JPS6160480B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention uses a collection of dots constituting a pixel to
The present invention relates to an information recording device that records information in a more preferable form and in a form that is easier to identify by changing the size of the dots when recording information. A symbol is created by a collection of dots (in the present invention,
In a recording device that records dots (used in the broadest sense, including characters, symbols, figures, etc.) on a recording medium, the shape of the dots that make up the pixels is predetermined, so the shape of the symbol is To make this change, we had to change the placement of the dots themselves. Therefore, in order to change the shape of a symbol, it is necessary to add a symbol generator that records the changed arrangement of dots, making the configuration complicated. Watermelon stripes (a stripe applied to a symbol recorded at a specific location on recording paper as a back shadow of the line where the symbol is located to call attention to it; for example, dots arranged in a checkered pattern) In order to record symbols on the formed stripes, it was common practice to print watermelon stripes on recording paper in advance using a normal printing method, and then record the symbols with dots on the recording paper. According to this method, it was necessary to prepare in advance many types of recording paper on which various watermelon stripes were printed. In order to eliminate the drawbacks of the conventional method, when trying to record watermelon stripes and symbols simultaneously on recording paper, it is difficult to record the dots that make up the watermelon stripes and the dots that make up the symbols. This makes it extremely difficult to identify symbols. That is, the 23rd
As shown in Figure A, the water melon stripe consists of a checkered pattern and the symbol A as shown in Figure 23B.
If these are simultaneously recorded on recording paper, a recording pattern as shown in FIG. 23C is obtained, but as can be seen from the figure, it is difficult to identify the letter A. The present application eliminates the above-mentioned drawbacks without requiring a complicated structure. Another object of the present application is to provide a recording device that records information in a more preferable form by changing the size of the dots. In other words, the memory 16 that stores the array of pixel information
5,184, clock pulse generation means 16 for generating clock pulses for reading pixel information from the memory;
6,180, Pulse signal generating means 401, 401-1 for generating pulse signals of mutually different widths synchronized with the clock pulse of the clock pulse generating means, for recording according to an AND condition of the pulse signal and the pixel information signal from the memory. It has a control circuit 403, 403-1 that outputs a pixel signal, and the control circuit is configured to select a pulse signal having a different pulse width depending on a signal representing the dot size, and the dot width per pixel is set to the dot size. An object of the present invention is to provide an information recording device that records an image by changing it according to a signal represented. The present invention will be described in detail below using a recording apparatus that records information by scanning a recording medium with a laser beam as an embodiment. FIG. 1 is a block diagram showing an overview of the recording apparatus, and shows a specific configuration The information providing unit 10 is composed of a device such as a magnetic tape and derives information to be recorded.
0. It consists of a control unit 101 that controls the information to be recorded obtained from the information supply unit 100 so as to be suitable for recording, and a recording unit 300 that records the information sent from the control unit 101 onto a recording medium. However, in this embodiment, the recording unit 300 scans a photoreceptor with a laser beam modulated according to recording information to form a latent image on the photoreceptor, and deposits toner on the latent image. This uses a recording device that transfers images onto recording paper, and this recording device will first be described in detail. 2 and 3 are perspective views showing an overview of the recording device and a perspective view showing an overview of the actual device.
A laser beam oscillated by a laser oscillator 301 is guided to an input aperture of a modulator 303 via a reflecting mirror 302. The reflecting mirror 302 is inserted to bend the optical path in order to reduce the space of the apparatus, and can be removed if not required. For the modulator 303, an acousto-optic modulation element using a known acousto-optic effect or an electro-optic element using an electro-optic effect is used. In the modulator 303, the laser beam is modulated in intensity according to the input signal to the modulator 303. In addition, when the laser oscillator 301 is a semiconductor laser, a gas laser, etc. that can perform current modulation, or an internally modulated laser that incorporates a modulation element in the oscillation optical path, The modulator 303 is omitted and the beam is guided directly to the beam expander 304. The beam diameter of the laser beam from the modulator 303 is expanded by a beam expander while remaining a parallel beam. Furthermore, the laser beam whose beam diameter has been expanded is a polyhedral rotating mirror 3 having one or more mirror surfaces.
It is incident on 05. The polyhedral rotating mirror 305 is mounted on a shaft supported by a high-quality bearing (for example, an air bearing) and is driven by a motor 306 that rotates at a constant speed (for example, a hysteresis synchronous motor, a DC servo motor). Therefore, the horizontally swept laser beam 312 is f-
An image is formed as a spot on a photosensitive drum 308 by an imaging lens 307 having θ characteristics. In a general imaging lens, when the incident angle of a ray is θ, the position r of the image on the image plane has the following relationship: r=f・tanθ (1) (f: focal length of the imaging lens) , as in this embodiment, a certain polyhedral rotating mirror 30
5, the angle of incidence of the reflected laser beam 312 on the imaging lens 307 changes linearly with time. Therefore, the photosensitive drum 30 serving as the image surface
The moving speed of the imaged spot position on 8 is
It changes non-linearly and is not constant. That is, the moving speed increases at the point where the angle of incidence increases. Therefore, by turning on the laser beam at regular time intervals,
When the spot rows are placed on the photosensitive drum 308, the intervals between them are wider at both ends than at the center. In order to avoid this phenomenon, the imaging lens 307 is designed to have the following characteristics: r=f·θ (2). Such an imaging lens 7 is called an f-θ lens. Furthermore, when collimated light is imaged into a spot by an imaging lens, the minimum diameter of the spot dmin is dmin=fλ/A...(3) where f: focal length of the imaging lens λ: wavelength of the light used A: Given by the entrance aperture of the imaging lens; if f and λ are constant, a smaller spot diameter dmin can be obtained by increasing A. The beam expander 304 mentioned above is used to provide this effect. Therefore, the necessary
If dmin is obtained by the beam diameter of the laser oscillator, the beam expander 304 is omitted. The beam detector 318 includes a small entrance slit and a fast response time photoelectric conversion element (e.g.
PIN diode). Beam detector 318
detects the position of the swept laser beam 312, and uses this detection signal to determine the start timing of the input signal to the modulator 303 for providing desired optical information on the photosensitive drum. As a result, errors in the division accuracy of each reflective surface of the polyhedral rotating mirror 305 and synchronization deviations of horizontal signals due to rotational unevenness can be greatly reduced, and high-quality images can be obtained. The tolerance range of accuracy required for the drive motor 306 is increased, and the drive motor 306 can be manufactured at a lower cost. As described above, the deflected and modulated laser beam 312 is irradiated onto the photosensitive drum 308, visualized by an electrophotographic process, transferred and fixed onto plain paper, and output as a hard copy. Next, the printing section 319 will be explained with reference to FIG. 4. As an example of the electrophotographic process applied to this embodiment, a photosensitive drum whose basic constituents are a conductive support, a photoconductive layer, and an insulating layer, as described in Japanese Patent Publication No. 42-23910 of the present applicant. The surface of the insulating layer 308 is uniformly charged positively or negatively in advance by a first corona charger 309, and charges of opposite polarity to the charged polarity are created at the interface between the photoconductive layer and the insulating layer or inside the photoconductive layer. Then, the surface of the insulating layer to be charged is irradiated with the laser beam 312 and, at the same time, an AC corona discharge is applied by the AC corona discharger 310 to capture the difference in surface potential that occurs according to the bright and dark pattern of the laser beam 312. A pattern is formed on the surface of the insulating layer, the entire surface of the insulating layer is uniformly exposed to light, a high-contrast electrostatic image is formed on the surface of the insulating layer, and the electrostatic image is charged and colored. After being developed and visualized by a developing device 313 using a developer mainly consisting of particles, the visible image is transferred to a transfer material 311 such as paper using an internal or external electric field, and then an infrared lamp or a hot plate is used. The transferred image is fixed by a fixing means 315 such as the like to obtain an electrophotographic print image, and after the transfer is performed, the surface of the insulating layer is cleaned by a cleaning device 316.
The photosensitive drum 308 is then cleaned to remove any remaining charged particles, and the photosensitive drum 308 is used repeatedly. Note that 314 is a transfer corona discharger, 31 is a post-corona discharger, and the same numbers in each figure indicate the same members. Next, in the embodiments described so far, the surface of the insulating layer of the photoreceptor, which has been uniformly charged in advance, is attenuated by alternating current corona discharge to attenuate the charge on the surface of the insulating layer, and at the same time, the photoreceptor is irradiated with laser light. The phenomenon that occurs will be further explained in detail with reference to FIG. FIG. 5 shows the state of change in surface potential on the surface of the insulating layer of the photoreceptor. FIG. 5a shows a case where the frequency of the alternating current of the alternating current corona discharge is relatively low. At this time, the potential of the surface of the insulating layer during AC neutralization can take an intermediate value between the curve shown by the solid line and the curve shown by the dotted line due to the difference in the phase of the AC voltage. However, the laser beam irradiation time is very short for a specific location on the photoreceptor, for example, in this embodiment, it is 150+1 seconds. Therefore, due to the difference in the potential of the surface of the insulating layer when the laser beam is irradiated, the potential of the electrostatic image obtained after the entire surface is exposed remains constant even though the irradiation amount of the laser beam is constant. It will stop happening. Therefore, unevenness synchronized with the frequency of the alternating current occurs in the developed image. In applications such as copying machines, this phenomenon does not appear because exposure is performed over the entire area of the AC static elimination area, so the influence of the phase is averaged out. In order to eliminate this phenomenon of unevenness, when the frequency of AC static elimination is increased (Fig. 5b), the amplitude of the fluctuation in the surface potential of the insulating layer that is synchronized with the AC frequency does not change the overall static elimination time. decreases. Therefore, the potential difference on the surface of the insulating layer during laser beam irradiation is reduced, and the unevenness of the developed image becomes practically negligible. This is explained by the equivalent circuit shown in FIG. In Figure 6, E is the voltage applied to the discharge electrode of the AC corona discharger, Rc is the resistance when the corona current flows between the discharge electrode and the photoreceptor, and Cp
represents the capacitance of the photoconductor when the photoconductor is considered as a capacitance-only load. At this time, if the potential on the surface of the insulating layer immediately before AC static elimination due to primary charging is Vo, and the voltage applied to the AC corona discharge electrode is E = Eo cos (wt + θ), then the voltage on the surface of the insulating layer during AC static elimination is: Potential Vp
teeth, It is expressed as From equation (4), the static electricity removal time is given by the second term on the right side,
Its time constant τ is CpRc. In addition, the amplitude of the fluctuation due to the frequency of AC corona discharge is determined from the first term.

It is given by [Formula]. Furthermore, from FIG. 5, the AC static neutralization time td is given by td=l/v (5) v: peripheral speed of the drum l: width of the static neutralization area. Furthermore, the amount corresponding to Cp in the equivalent circuit of FIG. 6 is proportional to the surface area of the photoreceptor that passes through the static elimination area per unit time. Cp=Av...(6) A: Constant of proportionality Here, if we assume that static electricity is sufficiently removed under the conditions of Cp=Cp ₁ , Rc=Rc ₁ , v=v ₁ , then in equation (4), The time constant for static elimination is τ ₁ = Cp ₁ RC ₁ ...(7) At this time, the amplitude of fluctuation Wo due to the AC discharge frequency wo is It is assumed that this amplitude Wo is large enough to cause density unevenness in the developed image. By setting W=W ₁ (W ₁ <W ₀ ), It is assumed that W ₁ is sufficiently small so as not to cause the density unevenness described above. In this way, by changing the frequency of AC corona discharge, the density unevenness can be removed without changing the static elimination time. Next, assuming that the circumferential speed of the drum is V = αv ₁ = v ₂ , CF ₂ = αCp ₁ ...(10) The static elimination time is td ₂ = l/v ₂ = l/αv ₁ = td ₁ /α
...(11) td ₁ = l/v ₁ Therefore, in order to remove static electricity sufficiently within td ₂ during static elimination, the static elimination time constant τ ₂ = Cp ₂・Rc ₂ = τ ₁ /α=Cp ₁・Rc ₁ /α……
(12) Since Cp ₂ = αCp ₁ , it is necessary that Rc ₂ = Rc ₁ /α ² (13). In practice, changing Rc is achieved by changing the distance between the discharge electrode wire and the photoreceptor. At this time, the amplitude of fluctuation W ₂ due to the frequency of the AC corona discharge is Then, to find the condition for W ₂ for W ₂ to become W ₁ , WcCp ₂ Rc ₂ = W ₁ Cp ₁ Rc ₁ ∴W ₂ = W ₁・Cp ₁・Rc ₁ /Cp ₂・Rc ₂ αW ₁ …
...(15) From equation (15), it is necessary to apply an AC corona frequency higher than a certain value in order to prevent the unevenness of the developed image from occurring, and that value is proportional to the circumferential speed of the drum. In this example, the peripheral speed v of the drum is 30
cm/sec, the width of the static elimination area was 3 cm x 30 cm, the capacitance G of the photosensitive plate was 5 pF/cm, the AC static neutralization current was 75 μArms, the voltage was 7 kV, the frequency was 1 KHz, and the electrostatic contrast was approximately 500 V. The development was carried out using liquid development and a reversal phenomenon.
From these experiments, it was possible to remove the unevenness of the image under the condition that the frequency of the AC power source was 〓v/0.03Hz...(16). That is, this means that the pitch due to the frequency of AC corona discharge on the photosensitive drum is 0.3 mm. Therefore, the effect of the above equation (16) can be expressed more generally by the condition 〓v/p...(17). P is a constant determined by the capacitance of the photoreceptor, the width of the static elimination area, the development conditions, etc., and was 0.03 in the above example. As still another example, the present applicant's Japanese Patent Publication No. 42
- The electrostatic image forming process of electrophotography as described in Publication No. 19748 is applied. That is, a photosensitive plate having a conductive support, a photoconductive layer, and an insulating layer as basic components is used, and the surface of the insulating layer is uniformly positively or negatively charged in advance by a first corona discharge, and the photoconductive layer A charge having a polarity opposite to the charged polarity is captured on the surface of the insulating layer or inside the photoconductive layer, and an alternating current corona discharge is applied to the charged surface to attenuate the charge on the surface of the insulating layer.
After the process of irradiating the laser beam as an information signal, forming an electrostatic image on the surface of the insulating layer according to the brightness of the laser beam, and then developing the electrostatic image, a first step is performed.
This is similar to the embodiment. The photoreceptor and laser oscillator used in the first and second embodiments were as follows. Combination A Laser oscillator He-Ne gas laser Wavelength 632.8mμ B Photoreceptor 90g of cadmium sulfide activated by copper
Add 10g of vinyl chloride, add a small amount of thinner, and mix the resulting photosensitive material to a thickness of about 100μ.
Spray onto aluminum foil to a thickness of approximately 70μ. Next, coat the surface of this photoconductive coating with a thickness of approximately
A photosensitive plate is obtained by closely bonding 25 μm Mylar films with adhesive, and the photosensitive member is then wound around a drum made of aluminum. In the case of this photoreceptor, the charge polarity of the first charge is positive. Combination B A Laser oscillator He-Cd laser Wavelength 441.6 mμ B Photoreceptor A Te layer with a thickness of approximately 1 μ is vacuum-deposited on an aluminum substrate, and a layer of Se containing 15% Te is further applied.
In the case of this photoreceptor, which is vacuum-deposited to a thickness of 90μ, a transparent insulating resin is applied to the surface to a thickness of about 30μ, and cured, the first charging polarity is negative. Furthermore, various laser light sources currently announced or to be announced in the future may also be applied to the first and second latent image forming processes. It is important to devise a combination of photoreceptors whose spectral sensitivity characteristics match the wavelength of each laser.

[Table] 〓Semiconductor 〃 〓
Available.
Therefore, in such a recording device, the photosensitive drum
308 is rotated at a constant speed in the direction of the arrow.
Then, drive the motor 306 so that the beam 312 is
The photosensitive drum 08 is moved over the optical drum 308 at a constant speed.
as if moving in a direction approximately parallel to the rotation center axis of
and draw this beam like the English letter “A”.
By modulating from the controlled modulator 303.
As shown in FIG.
It is something that can be used to draw characters. As will be explained in detail later, this device uses a certain sentence.
Ability to draw letters in three sizes: small, medium, and large.
The character pattern is shown in Figure 7.
The dots are arranged in a matrix so that
The lowercase letters are as shown in Figure 7A.
Drawn by selecting 7x9 dots,
(i.e., drawn by nine scan lines), and the small text
A blank space equivalent to 6 scanning lines is placed above the character.
There is a blank space equivalent to two dots to the right of the character.
, including the blank space is the lowercase letter 1.
Space required to output character information
It is. Medium letters are 14×18 dots as shown in Figure 7B.
(i.e. 18 lines)
), and the upper part of the medium character
has a blank space equivalent to 12 scanlines to the right of the character.
has a blank space equivalent to 4 dots.
, including the blank space is one Chinese character.
This is the space required to output information. Capital letters are 36 x 28 dots as shown in Figure 7C.
(i.e. 36 runs).
(drawn by horizontal lines) and 24 at the top of the capital letter.
A blank space corresponding to a scanning line is placed on the right of the character.
It is made up of a blank space corresponding to the
A screen equivalent to 60 x 36 dots including the blank space
The pace is necessary to output information with a single capital letter.
It is a space and thing that can be used. However, this capital letter
simplifies the configuration of the character generator, as detailed later.
, use the same character generator as the Chinese character generator.
One dot in Chinese characters is used as four dots
Therefore, the resolution of the characters is the same as that of Chinese characters.
It is something. The outline of the recording unit 300 is as described above.
However, going back to Figure 1, the information provision unit
100 and the control unit 101 will be described in detail. The information providing unit 100 does not necessarily have to be described above.
It is not limited to magnetic tape as usual;
other storage devices, or the computer itself.
The key is to be able to derive the information that should be recorded.
Any provision of such information would be fine, but
From unit 100, data is recorded in the recording unit.
Signals that encode the information to be recorded and control signals
This information is derived from magnetic tape.
on the loop (not shown) in the format shown in Figure 8.
It is stored in. That is, at standard density, the magnetic tape is as shown in Figure 8A.
Information is stored in blocks on the loop.
However, this one block contains 34 additional units.
It consists of a record area (record), and this one
The record further consists of 276 characters.
This one block is shown in Figure 9A,
136 characters per line in medium letters on the recording paper 103,
and information equivalent to one page consisting of 66 lines vertically.
It's something I remember. To explain in more detail, the first record is the control
This is the area where signals are memorized, and the 1st to 3rd characters
Enter the ID information described below in the character, and enter the ID information described below in the 5th character.
The mode information is stored in the 6th and 7th characters.
8th character stores reduced printing information.
Seshime, the 9th to 276th characters include the 1st record.
Do not store any meaningful information in the
It's a good thing. In this way, only control information is stored in the first record.
As a reminder, each of the 2nd to 34th
The record is recorded in the recording unit 300.
Information on characters, symbols, etc. (hereinafter referred to as characters) (hereinafter referred to as characters)
(referred to as lower character information) and the size of the character for each line.
Font size information (hereinafter referred to as size information)
), specifically, a certain record.
Recording paper 103 for the 2nd to 137th characters of the code
Copy the 136 character information that makes up one line above.
code and store it (the 138th character is blank).
space), the first character contains the 2nd to 137th characters.
Recording unit 30 for character information stored in Yarakuta
When recording with 0, change the size of the character by one line.
Stores the size information to be specified collectively, and
Similarly, the character code contains 136 character information.
(The 276th character is a blank spec.
(base) The 139th character includes the above 140th to 275th characters.
The size of characters or symbols stored in the vector can be changed all at once.
This is used to store size information specified by the user. In addition, the 276th character in the 2nd to 34th records
Kuta was described as blank, but the 34th record
The page end signal is stored in the 276th character of
It also sends a signal to notify the end of a certain program.
It also includes. Therefore, one record contains two lines of Chinese characters.
or memory information and character or symbol information in each line
The font size information that specifies the size when recording information is
33 of such records will be stored
Each page can store one page of information as shown in Figure 9A.
It is something that Figure 8B is a storage format for information that should be recorded with high density.
(hereinafter referred to as high-density format),
In such a case, the 2nd to 273rd keys of the 2nd to 34th records
Yarakuta stores 272 character or symbol information.
Characters 274 to 276 are left blank.
and the 2nd to 273rd characters are assigned to the 1st character.
Contains information specifying the font size of the file.
Same as described for Figure 8A except for
It consists of a structure. Such high-density information is indicated in lowercase letters as shown in Figure 9B.
272 characters per line on A4 size recording paper 103,
and 132 such lines are provided, so 4
A block containing information for one page of A4 size
It is. Note that the record number corresponding to the last line of the page
276 Inform the character that it is the end of the page
This is used to store the end mark for use. Na
Also, character support is provided in the information recording format shown in Figure 8A.
If the size specifies uppercase, each record
In, sentences of characters 2 to 69 and 140 to 207
Only character information is treated as valid information related to printing.
Items 70 to 137 and 208 to 275 are not printed.
Ru. In this embodiment, the control signal as described above is used.
However, the following instructions can be issued by such a signal.
It is possible to demonstrate. That is, the mode information has character information shown in FIG. 8A.
Whether it is standard density information or high density information as shown in Figure 8B.
The function information should be recorded.
The information to be used is fixed data or variable data.
(Here, fixed data is two pieces of information.)
Commonly used for each page when overlapping and recording on one page.
Tell me the data you have. Therefore, some information and other information
After printing them together, both data will be unnecessary.
If you want to use fixed data or variable data,
Although it may be used as dynamic data, for example, if the content is the same,
Record multiple recipients in each text
In such cases, the text becomes fixed data and the destination
is the fluctuating data. In addition, overlapping
Data that does not require this shall be considered variable data. further fluctuations
When specifying data, use (fixed data)
Contains a signal to indicate whether or not to superimpose
It is something that The reduced print information is 4 pages worth of information (must be
It doesn't have to be limited to 4 pages, it can be multiple pages)
Reduced printing on one page of output paper (hereinafter, such printing format is called reduced printing)
Should I print one page of information?
Specify whether to print on the page (hereinafter referred to as normal printing).
It is meant to show. Note that ID information indicates a unique number for a certain program.
A certain program is
When it becomes, it is set only in this first block.
Printing can be started from a specific program.
Use this program as a means of specifying
I can stay. Also, the multi-information specifies the number of copies.
Ru. There are blocks on the magnetic tape as shown in Figure 8.
A large amount of unit information is stored.
Then, the magnetic tape control circuit 1 of the control unit 101
04 to the magnetic tape control line 105.
applied to control the reading of information from magnetic tape
By doing so, the information read out on the output line 106 is
It's about getting information. Note that the magnetic tape control circuit 104 controls the magnetic tape.
Controls reading of information on the loop in blocks.
In this block, the information is
This is derived from the 1st record side. As mentioned above, character information is encoded on magnetic tape.
The information is stored as the
EBICDIC code is used as such code.
ASC11 code
The information on the output line 106 is coded to convert the information to
is applied to the code converter 107. Note that this code conversion
The device 107 responds to the code stored on the magnetic tape.
Also, the components used in the control unit 101 are
Of course, it can be omitted or changed depending on the code.
Ru. Information converted into ASC11 code in this way
is applied to the distributor 108, but this distributor 108
contains size information, information to be recorded, and control signals.
Classify and send size information and recording information to signal line 10
9, and the ID signal is routed through the signal line 110.
The function is stored in the ID register 115.
The function signal is sent to the function line via signal line 113.
The mode signal is stored in the register 118, and the mode signal is connected to the signal line.
112 to the mode register 117.
Therefore, the reduced printing signal is sent to the reduced printing register via the signal line 114.
The data is stored in the data 119. The size information and character information pass through the gate 120.
The page buffer register (hereinafter referred to as PBF) is
c) It is stored in 121 or PBF122.
However, this buffer register 121 is
This is a register used for storing data.
Capacity for storing lock information (approximately 9K bytes)
The PBF 122 is used for storing the fluctuation data.
These are registers for each of the above PBF121, etc.
4 registers PBF121 with new storage capacity
Consists of -1 to 121-4 and has a capacity of approximately 36K bytes.
storage device and satisfies the required access time.
If the random access memory (RAM)
Anything is possible, but in this example, semiconductor memory is used.
This is what I am using. The PBF121 and PBF122 are address counters.
123, 124, and 125 independently.
Therefore, it is necessary to read both PBFs at the same time.
It is also possible. Note that the PBF 122 has two address counters.
address counters 124 and 125, but
The printer 124 writes to the PBFs 122-1 to 122-4.
Controls writing and reading of recorded information, and addresses
Is counter 125 PBF122-3, 122-4?
This controls the reading of stored information.
By providing multiple page buffers in this way,
read out the stored information on multiple PBFs at the same time.
Recording two pieces of information on one recording paper
It can also be stored in PBF122.
Recording 4 pages of information in small letters on 1 page
It is also possible. As mentioned above, size information and character information are PBF12
1 or stored in PBF122
However, this determination is made by the write control circuit 126 at gate 1.
controlled by a gate signal applied to 20
It is something. The outputs of the registers 117 to 119 are write control
applied to a circuit 126 where the gate 120
It forms the gate signal that controls the
There are 8 types of combinations of these three command signals as shown below.
It is something that you have. However, when specifying variable data, fixed data
When instructing to read out overlapping with
There are two types, one not shown. (1) Fixed data, standard density, normal printing (2) Fixed data, standard density, reduced printing (3) Variable data (overlapping), standard density, normal printing (4) Variable data (overlapping), high density, normal printing (5) Variable data (overlapping), standard density, reduced printing (6) Variable data (non-overlapping), standard density, normal printing
Printing (7) Variable data (no overlap), high density, normal printing (8) Variable data (no overlap), standard density, reduced printing
Print Other combinations are errors. In such a command signal, in the case of (1) above,
Go to PBF121 in case of (2), go to PBF121 in case of (3).
In case of (4), go to PBF122-1.
Go to 1 to 4, in case of (5) go to PBF122-1 to 4, (6)
In case of (7), go to PBF122-1, in case of (7) go to PBF12
2-1 to 4, and in case of (8), PBF122-1
As the size and character information are written to ~4 respectively,
It forms the gate signal. In this way, PBF121 or PBF122
The information applied to is a signal from the write control circuit 126.
Write control signals applied by lines 127, 128
address counters 123, 12
4 is sequentially stored in PBF121, 122.
It is something. Note that the write control circuit 126 outputs a control signal for a certain page.
If it is determined that the command is instructing reduced printing
The information for four consecutive pages is PBF122-1~1
22-4. However,
One program satisfies four PBFs.
Quit this program if you want to quit without
It is possible to read only up to the page that is
In such cases, it may be less than 4 pages.
It is. Once the information has been stored in the PBF as described above, the
Writing to the main control circuit 130 is completed via line 129.
Apply the write end signal, and the main
A signal is sent from the control circuit 130 to the read control circuit 131.
A read command signal is given from line 132. Next, the information is read out and printed.
However, for example, the control signal as mentioned in (6) above,
- Fluctuation data (do not overlap), standard density, ordinary mark
Character and size information of information with printing control signals
is about the state stored in PBF122-1.
In other words, the read control circuit 131 has the above-mentioned functions.
Information in registers 117 to 119 is transmitted to signal lines 133 to
135, so this
The recorded information is now stored in PBF122-1.
The address counter is determined by the signal line 136.
Instructs counter 124 to read BF122-1.
It is something that Here, regarding the address counter 123, the fourteenth
To explain in more detail with reference to the figure, this
The address counter is the first address of each line on the PBF.
a reference counter 205 that counts the
The relative counter 206 counts the relative character position.
These two counters 205 and 206
The contents of are added by the adder 207 to this addition output.
This specifies the address on PBF121.
be. To explain in more detail, the reference counter 205
is the output of each of the multiple storage elements that make up the counter.
It has an output terminal 211 that derives the force in parallel,
First, it notifies that all scanning of a certain row has been completed.
a terminal 212 for applying a row complete signal;
Before starting printing a page, the reference counter 205
It has a clear terminal 213 for clearing the contents of
Ru. Also, the relative counter 206 constitutes a counter.
An output that derives the output of each of multiple storage elements in parallel.
has a power terminal 218 and has one character stroke.
Applying a digit end signal to notify that the scan is complete.
The scanning of terminal 215 and a certain scanning line for
By applying a scanning line end signal generated when
Clear terminal for clearing the contents of counter 206
216. The output terminal 218 is the lower digit of the register 207.
connected in parallel to the storage elements constituting the output terminal.
Child 211 is a record that constitutes the upper digits of register 207.
It is connected in parallel to the storage element. To explain in more detail, the number of lower digits is
It takes to count the number of characters stored in one line NC
When the number of digits is set and 1 bit is added to the LSD of the upper digit
The above NC is added to the register 207 as a whole.
The number of upper digits should be set on one page.
It is only necessary to be able to count the number of rows included. Therefore, one digit end signal is applied from 215.
When the count value of register 207 increases by 1
and when one row complete signal is applied, one
Number register 2 equal to the number of characters included in the line NC
The count value of 07 increases. In short, the register 207 functions as an adder.
It is working. The address counter 123 is configured as described above.
This is the result of reading PBF121.
Counters 205 and 206 are cleared before
The output of register 207, which works as an adder, is
0 and address 0, that is, the first line of the first line of a certain page.
Specifies the address of the th character information. This readout
Once completed, the digit complete signal is applied and the relative digit is
Since 1 is added to the contents of counter 206, register
The output of data 207 is 1, and the second digit of the first row is
Specify the address of the character. Continue reading in the same way and read the NC character.
Then (the output of register 207 becomes NC-1)
), the first reading of the first row has been completed.
(As I will explain in detail later, the actual truth
In the embodiment, one row is scanned by a plurality of m scanning lines.
Complete printing of one line as characters are formed
In order to do this, the information on the same line must be read m times repeatedly.
) The end of scan line signal is generated and the relative
Clear counter 206. Therefore, the output of register 207 becomes “0” again.
After reading m characters as described above, scan again.
A line end signal is generated. Repeat this kind of action
At the same time as the m-th scanning line end signal is derived.
Then, the row completion signal is sent to the terminal 21 of the reference counter 205.
2, the counter 205 registers the register.
NC is added to the contents of star 207, and its output is
Becomes NC. This NC stores the first character of the second line.
Since this is the address, read the first character and
A digit complete signal is applied upon completion of such a read.
Due to the issue, the output of register 207 becomes NC+1.
Indicates the address of the second character on the second line. Below
In the same manner as below, the output of the repeat register 207 is
When it becomes 2NC-1, the scanning line end signal is applied.
Again from the NC address, the number is NC+1, ...2NC-1.
Repeat the location specification and end the scanning line on the second line
As soon as the signal is derived m times, the reference counter
The content becomes 2NC, and the content of the relative counter 206 becomes 0.
Then, the reading of the third line is repeated. By repeating the above reading, 1
It reads out information corresponding to a page, but this
Since we used a reference counter and a relative counter in the same way,
When repeatedly reading character information on the same line
You can simply clear the relative counter and read
This makes control extremely simple. In addition, this
Here, only the address counter 124 will be described in detail.
However, the address counters 123 and 125 are also completely blank.
They are configured in the same way, and the address counter
When using the diagram in FIG. 14 in connection with the printer 123,
The numbers used in Figure 14 are appended with (-1).
characters used in connection with the address counter 125.
When it is used, the subscript (-2) is used. 13
8,139 is a size latch, recorded in one line.
The character information stored at the beginning of each line of
address information, but it also stores address information.
The information read out according to instructions from the printer 124 is
Indicate to Tsuchi 138 using address counter 125.
The information read out is stored in the size latch 139.
The gate 137 is read through the signal line 140 as shown in FIG.
It is controlled by the output control circuit 131.
Therefore, in the above example, the read control circuit 131
The address counter 124 is read by the signal line 136.
Since the output command is issued, the read character size is
gate to guide the size information to the size latch 138.
137. The character information is read after the character size information.
However, the gate 137 is
After reading the size information, transfer the read information to the data
The read control circuit 131 leads to the output 141.
It is controlled by This gate 137 is the target of the read control circuit 131.
When it is determined that it is quasi-density information,
The size information is read as is, 136 in one row
Data while reading information corresponding to a character.
Readout sequential information is applied to latch 141, and
When the reading of a certain line is completed, the above 16
The read information is sequentially read from the beginning of the character to the data latch.
It is controlled so that the cycle of application is repeated.
It is something. (If printing of a certain line is not completed,
If the read control circuit 131 is high-density information
font size information is readable.
and read information equivalent to 275 characters.
While reading, the read information is printed on the data latch 141.
Something that controls the repetition of the period of addition.
It is. The size latches 138 and 139 are decorated with decorations, respectively.
cards 142 and 143 are provided, and such devices
Large, medium, small font size with coders 142 and 143
It decodes information. This decoder 14
2,143 is a signal from the read control circuit 131.
Lines 144-1 and 144-2 are connected, but
This signal line applies a control signal during reduced printing.
decodes uppercase letters as middle letters, and decodes uppercase letters as middle letters.
No restrictions apply when decoding as lowercase letters and printing normally.
No control signal is applied. The output of either of such decoders 142, 143
The force is derived on signal line 144 via gate 145
However, in the case of reduced printing, the output of one of the decoders
It acts as a gate that distributes and selects power based on time.
For normal printing, select output 142.
The sea urchins are working hard. In other words, for reduced printing
and when decoder 142 is selected,
The output of decoder 142 is applied to signal line 144.
When decoder 143 is selected, as shown in
The output of the decoder 143 is applied to the signal line 144.
to the read control circuit via the signal line 146.
It gives you more control. 147 and 148 are line counters, and each counter
The counter counts the number of scanning lines required to form a character,
After counting a predetermined number, go to the readout control circuit 131.
A row completion signal is applied via signal lines 226 and 227.
Specifically, the decoder 142,1
When the size according to the output of 43 is lowercase, the size shown in Figure 7 is
As is clear from A, after counting 15 scanning lines, we get
To derive the force, for medium letters, 30 scanning lines are calculated.
It is structured so that the output is derived after counting.
be. As mentioned later, uppercase letters are the same as medium letters.
It is structured like this. Note that the counting circuit selected in this way has a vertical
Applying the vertical output from the clock circuit 149,
This vertical output is counted, but this
Vertical output is provided by a recording drum using a laser beam.
Occurs every time a scan starts or ends
Therefore, this line counter 147, 148
The output of is the scan number of a certain character.
This is an indication of what to do. Note that uppercase letters also serve as a middle letter generator.
Therefore, when a capital letter is detected, the vertical
so that the force count is 1/2, i.e. 2 vertical clocks
Controlled by reduced printing signal to count 1 by
It is equipped with a gate that allows line
The outputs of counters 147 and 148 are sent to gate 151.
to the modification circuit 152 through the modification circuit 1
52 is further applied to the character generation circuit 150.
It is something. Note that the gate 151 is the gate
145, the control signal on signal line 146
It is controlled, and the noise during reduced printing is
Select one of the counter outputs and print normally.
operates to select the signal from the line counter.
It is something. Now, let's learn more about the character generation circuit 150.
In detail, this circuit is shown in Figures 1 and 10.
As shown in Figure A, the output of the data latch 141
Character information from line 153 and lead to signal line 144
Apply the generated font size information to create font information.
Applied to the lowercase character generation terminal 155 of the character generator 154
or apply it to the middle character generation terminal 156 (text
When the font size information specifies uppercase letters, medium letters are emitted.
Selection circuit 1 for selecting (applied to raw terminal 156)
57 and applied from terminal 155 or 156.
In the character information output from the change circuit 152,
Corresponds to the scan line selected by the output signal on field line 159
Output the dot signals to the dot output line 158 in parallel.
It is something to do. This dot output line 158 is smaller than the signal line 144.
When the character size signal is applied, dot output line 1
58 D1 to D7 at the same time, the signal line 14
4 to medium font size signal or uppercase font size signal
When the number or capital size signal is applied,
Simultaneously send signals to D1 to D14 of dot output line 158.
This is what you get. Lowercase letter size “A” with reference to Figure 10B.
If you want to explain when to generate the output
Line 153 indicates the information code signal for the letter A and the lowercase letter.
The size information is sent to the selection circuit 157 via the signal line 144.
When applied to , the information code signal for letter A is
The signal is applied to the character generation terminal 155. At this time, the character generator 154 is connected to the output line 159.
Apply a signal indicating that it is the first scanning line.
If so, the dot output lines D1 to D7 are
Corresponding to dots 160 to 162 of the first scanning line
It is possible to obtain output from D3 to D5.
Similarly, the output line 159 is the second scanning line.
When a signal indicating the dot output line D1 is applied, the dot output line D1
~D7 is dot 16 of the second scanning line in figure B
3,164, output can be obtained at D2 and D6.
It is possible to do this. Similarly, the scanning line number is
By sequentially specifying the numbers up to 9, the dot output line
D1 to D7 have dots corresponding to the dots shown in B.
It is possible to obtain output from the output line.
Ru. Here we will explain the generation of lowercase dot signals in detail.
As mentioned above, when specifying Chinese characters, character information is
is applied to the medium character generation terminal 156, and the output line 15
9 to apply a signal indicating the scanning line number.
emits a dot signal corresponding to the scanning line specified by
However, as shown in Figure 7B, the Chinese
The characters are structured to select 14 x 18 dots.
Therefore, it should be indicated by output line 159.
There are scanning lines from 1 to 18, and these scanning lines are specified.
When the dot output lines D1 to D14 are output at the same time,
It is something that can be obtained. In this way, dot output lines D1 to D7 or
The dot outputs output in parallel to D1 to D14 are
Although they are written simultaneously in parallel to the shift register 165,
It is. This shift register 165 is a laser
The speed at which the drum 312 scans over the photosensitive drum 308
A horizontal clock that generates a clock signal synchronized with
Shifted by clock pulses from generator 166
Therefore, it follows the movement of the laser beam.
Shift sequentially and read from the dot output D1 side.
It is. FIG. 7B should be drawn on the photosensitive drum 308.
Assuming the letter A, the laser beam is
When it is at the first parallel position C1 of the first scanning line, it is shifted.
Read the output of the first dot from the register 165
When the laser beam is located at the second row position C2, the
A soft pulse is applied, and the output of the second dot D2
is read out, and the laser beam is positioned at the third column position C3.
Once placed, a shift pulse is applied and the third dot D
The laser beam reads out the output of step 3.
One shift pulse is printed when one column position is moved.
It is configured so that it is added and shifted by 1 bit.
It is. In this way, a certain scanning line in a certain character
When scanning to the specified column position is completed, the next character information is
The information is read out to the data latch 141 and the
Read out the dot signal corresponding to the scanning line and
is transferred to the shift register 165 in parallel.
However, after reading out some text information like this,
If you read the next character information immediately, all adjacent characters
The letters are so close together that it is difficult to read them.
Therefore, in this example, lowercase letters are used because it is not practical.
In the case of , two dots are placed between the letters as shown in Figure 7A
Provide a blank space corresponding to
This is to provide a blank space for the opening. In Figure 10A
167 forms such a blank space.
This is a blank area forming circuit provided for the shift register.
A blank signal is applied to the terminal 165.
In other words, the lowercase letters connected to the dot output lines D8 and D9
Blank line 169 and shift register 165
Connect the dot output line D14 to the connected storage element.
The signal line 14 has a blank line 170 with
When lowercase character size information is applied by 4, it is set to small.
Applying a blank signal to the character blank line 169
Place this in the 8th and 9th column positions of shift register 165.
applied to the corresponding storage element and by signal line 144.
When large or medium font size information is applied
prints a blank signal on the blank line 170.
In addition, this is transferred to the 15th to 18th columns of the shift register 165.
It is applied to the storage element corresponding to the position. In this way, the blank part forming circuit 167 is provided,
9 clock pads are included as part of the horizontal clock generator 166.
When the counting is completed, the signal line 171 is
and sends a completion signal to the readout control circuit 131.
Lowercase counting circuit that returns to 0 and 18 clock pulses
When the count is completed, the signal line 171
While sending a completion signal to the read control circuit 131
Zero-returning medium-character counting circuit and 36 clock pulses
When the count is completed, the signal line 171 is
and sends a completion signal to the readout control circuit 131.
It has a capital character counting circuit that returns to zero, and the signal line
According to the font size information applied by 144,
Determine whether to apply a clock pulse to each counting circuit.
It has a gate circuit that determines the selected
The reading is completed by the arrival of the completion signal from the character counting circuit.
Address counter 12 from output control circuit 131
For the selected 3,124,125
This command instructs the reading of the next character. Na
Oh, because the character generation circuit 154 generates uppercase letters.
It does not have the circuit shown in Figure 7 B and C.
As is clear from the above, one dot in a Chinese character is made into four dots.
This is no longer necessary because it was formed by
Because of this, the horizontal clock generator 166 is
When clock information is applied, the clock frequency is halved.
It has a frequency dividing circuit that divides the frequency into
When information is applied via signal line 144, the shift occurs.
The shift register 1 is
Apply a clock with half the normal frequency to 65.
It is controlled as follows. As mentioned above, the horizontal clock generator 166 and
By providing the character generation circuit 150,
There are spaces between adjacent characters in the direction corresponding to the size of the characters.
A certain blank space is formed. However, as it is, between the lines, that is,
The spaces between vertically adjacent characters are very close together.
However, in this example, the line
Circuit 152 for changing the outputs of counters 147 and 148
and then to the character generator 154.
As shown in Figure 7 A, B, and C,
In addition, the vertical clock circuit 149 is
1 on the scanning line from the horizontal clock circuit 166.
the number of dots required to form the letter.
A digit end signal is sent from the signal line 278 every time the tsuku pulse is counted.
(If the font size is lowercase)
Every 9 horizontal pulses, 18 horizontal pulses for medium letters
1 digit for every 36 horizontal pulses when uppercase
(receives a termination signal), vertical clock circuit 149
is the end of digit signal according to the size information, one line
Count the number of characters corresponding to and mark the completion of this count.
Both the scanning line end signals are sent to the line counters 147 and 1.
48. Fill the blank space equivalent to 6 scanning lines with a medium character above the character.
, the blank area corresponding to 12 scan lines is placed above the character.
and 24 scan lines of space for uppercase letters.
The part is formed so that the part is formed on top of the letters.
However, in the change circuit 152,
does not use any special circuit and uses the one for medium letters as is.
It is meant to be shared. To explain in more detail, this changing circuit 15
2 passes through the gate 151 and becomes the counter output again.
The number of scan lines corresponding to the line spacing (i.e., lowercase letters)
The number of times to subtract 6 for , and 12 for Chinese characters.
Subtract 6 or add 12 depending on the path and size information.
It includes a selection circuit that determines whether to subtract.
Ru. For example, when the printing of a certain line is completed and the 10th print of the next line is completed,
When starting printing as shown in Figure B, the line counter 147
Or the output of 148 (1, 2, 3...15)
Input to the scanning line specification terminal of the character generator 150 as is.
Then, a blank space is not formed above the character, so the
until the number of scans reaches 6, which corresponds to the blank area.
This adds a blank space. With this configuration, the character generator has −
5, -4, -3...9, outputs are applied.
Then, the counting outputs of 1, 2...9, are applied.
The character generator can only be accessed when
-5, -4 since the character output is derived
...6 scanning line period counting 0, character occurrence
No character information is obtained from the circuit 150;
The scanning line period of the lever is formed as a blank space.
It is. FIG. 15 shows a specific example of the change circuit 152 as described above.
Here, the change circuit 152 is
Corresponds to the adder 279 and the scanning line of the blank space for lowercase letters.
The lowercase complement circuit 280 that generates the complement of
Chinese text that generates the complement corresponding to the scan line of the character space
Depending on the character complement circuit 281 and size information, which
A gate 282 determines whether the complement circuit is selected.
The line that passed through gate 151
Generated according to counter output 283 and size information.
This is done by adding the complement numbers. Therefore, the augend from output 283 is lowercase.
If the number exceeds 7, and if the number exceeds 14 in Chinese characters, the
A carry is output to the output line 284 that sends out a carry.
Therefore, the character generation circuit is only activated when this carrier is present.
The character signal is sent from 150.
By setting
The character generation circuit starts driving until the line is reached.
It's something that doesn't exist. On the other hand, the readout section of PBF121 will be explained.
If so, from the read control circuit 131 to the signal line 172
The address counter 123 operates under the control of
Then, the information of the indicated address of the address counter 123 is
information is applied to gate 174, which gate 1
74 is a recorder under the control of the readout control circuit 131.
When the information is standard density information, the first of each record,
The font size information of the 139th character is the size
Same size as Latch 138 or 139
To Chi 175, 2nd to 137th, 140th to 275th characters
The character information of the data clutch 141 is
Something that operates to transfer data to the data latch 176
It is. The output of the size latch 175 is the size
Size decoder similar to decoders 142 and 143
177, but this size decoder 1
77 is a signal line 178 from the read control circuit 131
The fluctuation data is controlled by
The decoder 177 operates only when the
In this case, the output of the decoder 177 is controlled so that it is not derived.
It is under your control. The output of the decoder 177 is
vertical clock circuit 179 similar to clock circuit 149;
A horizontal clock similar to the horizontal clock generator 166
Tsuk generator 180, the line counters 147, 14
Line counter 181 similar to 8, the character generation circuit
Character generation circuit similar to 150 and the change circuit 1
It is applied to the change circuit 183 similar to 52.
Ru. Also, the output of the data latch 176 is the data
Similarly to the latch 141, the voltage is applied to the character generation circuit 182.
The output of this character generation circuit 182 is
Shift register 184 similar to register 165
It is applied to In short, the readout section of PBF122 is printed in reduced size.
There were two systems in PBF121, but the readout section of PBF121
It only means that there is only one system, and each block
The structure itself is the same for both. Now, let's talk about the clock generation method.
If so, this device is the main reference for all clocks.
This main clock generator has a clock generator 185.
The high frequency generated by the generator 185 (in the example
(approximately 80MHz) to the recording clock generator 186.
The recording clock generator 186 applies this main clock.
A recording clock that counts down the clock (approx.
5MHz) is used for recording control. However, this countdown is always going on.
beam detection in the recording unit 300.
A gate is formed by the output of the output device 318, and the output of this output is
The countdown starts after application.
Ru. FIG. 11 shows such a recording clock generator 186.
This is shown in more detail as shown in Figure 1.
Detection output of the beam detector 318 (Fig. 12b)
) is connected to the signal line 18 via the print control unit 187.
8 and via interface 189
R- applied on signal line 190 and shown in FIG.
Set the S flip-flop 191. This set output is applied to the 1/16 frequency divider 192.
The voltage shown in FIG. 12a is applied from the output line 193.
Start counting main clock pulses (80MHz) like this
For every 16 pulses, count as shown in Figure 12C.
A pulse is delivered on output line 194. This counting pulse is a predetermined number (in the example,
200), the counter 19 derives the output.
5 and further gate the output of this counter 195.
is applied to the gate 196 as well as to the gate 196.
The output line 194 is connected. Therefore, this cow
After the printer 195 has counted a predetermined number N, the
An output can be obtained from the gate 196 by
In the example, this value is set to 200.
Therefore, the pulses after the 200th pulse are connected to the output line 19.
7. The pulses on such output line 197 are further
After counting n (2448 pulses in the example)
This counter is applied to a counter 198 which derives an output.
The output of the counter 198 is inverted and the gate 19
9, the output line 200 has the first
It is possible to obtain a certain number of pulses as shown in Figure 2e.
It is coming. Here, the count values of the counters 195 and 198
In terms of the meaning of N and m, laser
The beam 312 scans the photosensitive drum 308.
When recording information using a certain scanning line,
The position from which recording begins must be defined very precisely.
Must be. If this provision is not followed correctly
The print start position is shifted for each scanning line, for example, as shown in Figure 7.
When a character is drawn using multiple scanning lines, each dot
The target is not exactly on a straight line in the column direction and jitters.
It appears as. For this purpose, move the laser beam to the left as shown in Figure 2.
If you want to move from to right, than start recording information.
Furthermore, a beam detector 318 is installed at a certain location on the left side.
The beam detector 318 detects the beam.
starts counting the clock frequency and calculates this count value.
Recording starts when a certain number is reached.
It is good if you can do it. The clock frequency used for recording is around 5MHz.
Therefore, this 5MHz clock can be used as is.
If used for counting, 80MHz as in this example is used.
Although the clock generator 185 is not necessary,
In the present invention, the recording start position is accurately defined.
Therefore, such a main clock generator 185 is used.
It is something. That is, if a 5MHz clock generator
This clock count is measured using a beam detector.
If it is started by the output of 318, counting will start.
The error occurs for a maximum of one clock cycle.
Ru. This one clock has a difference equivalent to one dot.
This means that considerable jitter is printed.
It means that it appears in the written character.
Ru. Therefore, in this example, the actual recording frequency is
Forming an 80MHz clock, which is 16 times 5MHz.
1/16 minute by the output of the beam detector 318.
The output of the frequency divider is calculated so as to operate the frequency divider 19.
Counter 195 counted and the count value became N.
The intention was to start recording from that point. Therefore, the counting start error is 1/16th of the maximum recording frequency.
Only the lock cycle (5MHz clock) is generated.
Since there is no such thing, the maximum amount is equivalent to 1/16 of 1 dot.
However, the error is within a range that is sufficient for practical use.
It is what it is. As is clear from the above explanation, the above N is a scanning
Set the printing start position (left margin) on the line.
Since the value of the counter 195 is to be determined,
By making the numerical value N variable, the
You can also adjust the left margin.
It is. Note that the count value N of this counter 195 may be variable.
Instead of the counter 201 as shown in FIG.
The output of is applied to the comparator 202 and manually
Numeric value setter 203 that can set numerical values
The output is applied to the comparator 202, and both outputs are
The comparator 202 determines if there is a match, and if there is a match, it is output.
The output may be derived from the line of force 204.
Of course. Further, the count value M of the counter 198 is
Determine the position on the line where information recording should end.
In the case of Chinese characters, one character's space is used.
136 characters in one line that takes 18 dots as a base
Since it is a device that can record 18 characters from the recording start position.
×136 = 2448 dots (lowercase and uppercase letters)
(This is the same even if the scanning line is moved)
This is to stop the clock output for the control.
Ru. In addition, in Figure 12, C' is the same as C.
It is simply a change in the time axis.
Furthermore, the circuit shown in FIG.
Applying the set output of loop 191 to the reset input
The output of the counter 198 is delayed by a delay time τ.
The free circuit connected to the set input via extension circuit 286
It has a flipflop 285, but this flipflop
The set output of loop 285 is configured as shown in Figure 12.
As a result, the beam detector can obtain a detection output and at the same time provide a high level of detection output.
The level is lower than that of the bell, and the recording of information is completed.
After a time τ has elapsed since (this τ is the laser beam
Record the last character of a line, and then
recording area, in this case defined by A4 size
(sufficient time to escape the area) lower levels.
It changes to a high level. In this embodiment, the video information generator 287
Applied shift register 184 or 165
from the clock generator 186 and the output from the clock generator 186.
The control signal as shown in FIG.
Modulator 303 via interface 189
It is applied to Shift register like this
Applying not only the output but also the control signal to the modulator.
The reason is that the beam is not exposed to light except when drawing characters.
The recording area of the drum is suppressed from being irradiated, and
First, the beam detector is suppressed so that the beam can be detected.
This is to cancel the . In this example, in order to detect the position of the beam,
Although the beam detector 318 was used, this beam position detection
The output device 318 is a photosensitive drum (recording paper) and a
They are arranged in the positional relationship as shown. That is, the width W on the photosensitive drum 308 is
The area is the area to be transferred to the transfer material (recording paper).
And the beam 31 is on the straight line shown by the dotted line L.
2 repeatedly scans in the direction of arrow R in the figure.
If the beam detector 318 is
Further than beam 312-1 located at the left end of W
Place it in a position where the beam located on the left side can be detected.
It is something that Fix the beam detector in this way
and keep the beam deflection speed constant.
If you keep the constant frequency clock frequency
By starting counting from the time the beam is detected, the beam
It is possible to accurately know the position of the target. Therefore, as explained in detail in the examples,
The beam can be modulated using information according to the beam position.
It is capable of recording characters. In Figure 21, the width V is the area to be recorded.
If (the beam scans this area)
The modulation signal of the modulator is applied based on the information of Kinomi PBF.
be done. ) dL and dR are the left mark on the recording paper.
Gin is a light margin space and takes
The area must be constructed so that the beam is not irradiated.
Must be. In the present invention, as shown in FIG. 11 for such purpose,
A flip-flop 285 as shown in FIG.
A control signal as shown in Fig. 12g is sent from the flop.
The logical output of this control signal and the information from the PBF
The modulator is modulated by
To further explain, the beam detector 318
detects the beam and then positions it at the right end of the beam width V.
τ time after the beam is placed on the right side of the width W.
(longer than the time it takes to reach the edge).
PBF between the control signal such as turning off the system and the width V
The one that controls the beam both with the character signal from
It is. Therefore, the beam is OFF in the interval dL and dR.
It is controlled so that the characters are drawn only between the width V.
The beam is irradiated with the beam. In this way, in this embodiment, the beam detection output
The beam position is detected by
The rotating polygon mirror 305 is
This makes manufacturing extremely easy. In other words, in order to detect the position of the beam, conventional
This is done even if the rotation of the motor 306 is detected.
However, if such a method is used, there will be many problems.
The precision of mirror processing must be extremely strict.
On the other hand, as mentioned above, a beam detector is installed to perform this detection.
Start counting the clocks using the output and
Configure to detect beam position based on numerical content
As a result, the accuracy of polygon mirrors is about 10 times lower than conventional mirrors.
It does not cause any inconvenience at all. In addition, specifically, the clock is set to a beam detection output.
A power-triggered frequency divider provides a recording clock.
Because it is made by a stable frequency, and
You can create a clock for recording at low cost.
It is something. Here, we have not explained it on the drawings so far.
If I were to explain the point where I got it, I would say 21 in Figure 1.
9 is the operation panel, and on this panel
, a switch 290 for specifying the ID number, and a switch 290 for specifying the ID number.
Switch 291 for specifying the page in , and both of the above
Based on your input, the corresponding location on the magnetic tape
Search command switch 292 for specifying search, star
, stop switch 293, number of copies set
Switch 294, automatic/manual changeover switch for number of sheets
295, normal printing command switch, reduced printing command switch
Reduction control with on/off and automatic mode switch
Has a switch 296 and a power switch 297
It is something. Furthermore, in Figure 1, 289 is a sequential system.
3-phase clock generator that generates clock for control
It is. In addition, in Fig. 11, the terminal 288 is lowered.
This is the pin that receives the clock signal and supports size information.
It can also be used as a clock to read the text
It is. With the structure described above, characters etc. can be shaped
The size of the dots formed is fixed, so the characters
When trying to change the shape etc. of
The very shape of the character signal sent from 0,182
This is something that has to change. However, if you want to change the thickness of the letters etc.
Requests such as
say you want to form watermelon stripes.
For various requests, as mentioned above, characters are generated.
Changing character signals sent from devices 150 and 182
cannot be a good solution.
Ru. If further explained according to the drawings, the above implementation
If you draw the letter “A” as in the example, it will appear in Figure 23B.
The characters shown in Figure 24A and B are drawn.
You can make the width of one dot smaller or larger.
Change the shape of the letters by
There are cases where you want watermelon stripes.
When trying to draw characters on top, use the method shown in Figure 24C.
Just like that, water melon strata with narrow dots.
This water melon stripe and
Superimpose the letter “A” as shown in Figure 23B.
By setting the recording pattern as shown in FIG. 24D,
You can get In this way, the pixels are configured
If the size of the dot is made variable,
Information is recorded using dots of a size that corresponds to the information to be recorded.
It is possible to record information, but as shown in Figure 1.
For this purpose, the numbers 400 to 403 are shown.
This is the circuit prepared for. In the explanation so far, the code signal is ASC1
Although it was explained that it consists of one chord, it is not explained here.
Similarly, the size of the dot can be changed according to the character code signal.
If you want to change it, change it to ASC11 code.
Approximately 2 bits are added to the
It may be configured to indicate the size of the hole. Now, in Figure 1, 400 indicates the instruction.
Dot size detection to identify the dot size
This dot size detector 400
and is latched into the data latch 176 along with the data.
The detected dot size is detected and the detection output is output as a parameter.
applied to the pulse width converter 401. This pulse width change
Converter 401 is connected to the main clock generator 185.
The output of clock generator 186 is applied to
The frequency of the recording clock is the same as that of the recording clock.
Time to form multiple types of pulses with varying pulse widths
and an indication of the dot size detector 400.
of a pulse with a certain pulse width selected by
The signal is output onto the signal line 402. this
A signal line 402 is the output of the shift register 184.
is input to one end of gate 403 to which
be. Therefore, from this gate 403, there is a shift register.
The output of the converter 184 is selected by the pulse width converter 401.
The pulse width is derived as follows.
For example, a watermelon as shown in FIG. 23A
Image information about the tripe is stored in the shift register.
If it is stored in 184, this shift lever
The output of the register 184 is a pulse as shown in FIG. 26b.
It is the width. However, at this time,
The pulse width converter 401 generates a signal as shown in FIG. 26d.
If a narrow pulse is derived,
From the gate 403, as shown in FIG.
A pulse signal will be derived. That is, the shift register 1 as shown in FIG. 26b
The output of 84 is converted as shown in FIG.
Since the modulator is controlled by such an output,
By doing so, a recording pattern as shown in FIG. 24D is created.
It is something that you can get a lot of benefits from. Similarly, if you draw the letter “A”, the original
If there is, it should be something like Figure 23B.
Then, a recording pattern as shown in FIG. 24A is obtained.
It is something that can be done. However, in this case, Pal
The pulse width obtained from the pulse width converter 401 is determined by the recording clock.
It is depicted as 3/5 of Ku. In addition, in the examples up to FIG.
The cross-sectional shape of the laser beam that irradiates the drum is cylindrical.
As explained above, you can change the dot width like this.
For the purpose of
Preferably, it is shaped like a tube. In addition, such dots
pulse size detector 400, pulse width converter 401,
The signal line 402 and gate 403 are exactly the same as above.
Between data latch 141 and shift register 165
It can be installed in
Simply add -1 to each corresponding member for detailed information.
Explanation will be omitted. The pulse width converter 40 is shown in FIGS. 25 and 26.
1,401-1 and gate 403,403-1
To explain in more detail, what is indicated by 404 is:
Connect an 80MHz clock signal to one terminal 405.
the other terminal 406 as shown in FIG. 12d.
This is an AND gate to which a gate signal is applied. Kurotsu derived from such AND gate 404
The clock signal is a hexadecimal ring counter (e.g.
counter) 407 for counting.
However, the counter 407 counts 3, 14,
Flip outputs as set and reset inputs
Apply to flop 408, count output of 7, 10,
as a set input and a flip-flop input as a reset input.
This is applied to pin 409. Therefore, the terminal
405 is marked with a clock signal as shown in FIG. 26a.
Assuming that the shift register in Figure 1 is
Equivalent to 1 dot output from stars 184 and 165
The output signal of the clock signal is as shown in Figure 26b.
It is equivalent to No. 16 (the record clock is
5MHz), the flip-flop 40
On the set output lines 410 to 411 of 8,409,
As shown in Figure 26c and d, respectively, the frequency is the recording clock.
Same as lock, but the pulse width is different2
It is possible to obtain various pulse signals. These signal lines 410 to 411 are connected to the AND game, respectively.
At the same time, this AND
Gates 412 and 413 also have dot size detection
The output lines 414 to 415 of the device 400 are connected. This dot size detector is a 2-bit dot size detector as mentioned above.
Decode the dot instruction code of
The output is derived to output lines 414 to 417.
For example, when the instruction code is “00”, output line 4
16, and when it is “01”, it is on the output line 414,
When it is “10” it is on the output line 415, when it is “11” it is on the output line 415.
Decode outputs latched respectively on output lines 417
It derives the signal. Therefore, the output lines of AND gates 412 and 413
The signal lines 418 and 419 have dot size detection
In response to the decoded output signal of the output device 400, the 26th
Pulse signals as shown in Figures c and d are derived, and the signal line 4
16, from which high-level DC signals are derived.
It is. Therefore, such signal lines 416, 418, 419
Introduced to AND gates 420, 421, and 423 respectively
The other end of the AND gate is connected to the shift lever.
By applying the outputs of registers 184 and 165,
The output of the second gate is introduced into the OR gate 424.
Then, from the OR gate 424, the shift register
The pulse width of the output signal of the controller is controlled and derived.
It is something. For example,
The output recording signal corresponding to one dot is shown in Figure 26b.
As shown in the figure, the 16 pulses of the 80MHz original clock signal
It is equivalent, but there is a dot site on terminal 425.
OR gate 4 when 00 is applied as the signal
From 24 onwards, the output signal of the shift register remains as is.
When 01 is applied, it is shown in Figure 26e.
When the output signal as shown in Fig. 26 is applied, 10 is applied.
A signal 11 as shown in is derived. That is, do
The pulse width may change depending on the output size signal.
This is the result. Therefore, “00” is applied as the dot size signal.
If you draw the letter A in the state shown in Figure 23B,
When a pattern is obtained, the dot size signal and
If “01” is used, as shown in Figure 24A.
A pattern can be obtained. Also, the checkered pattern shown in Figure 23A is dotted.
If the signal is “00”, then the dot site is
If the signal “10” is used, the result will be as shown in Figure 24C.
A pattern is obtained. Therefore, from the gate circuit 403, as shown in FIG.
Watermelon stripes made of a similar checkered pattern
The gate circuit 403-
1 to the letters constituting the letter A as shown in Figure 23B.
If we derive the number on the drum, it is shown in Figure 24.
The pattern shown in D is formed.
This makes it extremely easy to identify characters.
This can be seen by comparing Figure 23C and Figure 24D.
It will be understood even more clearly. In the above, the pulse width for recording dots is
The above explanation is for reducing the dot size.
Although I only explained what to write,
Is signal “11” is applied and output on signal line 417
When the signal is derived, the pulse width is widened
It is controlled as follows. That is, the signal line 417
is an AND with the output of the shift register applied to one end.
The output signal shown in FIG. 27a is applied to the gate 426.
However, one of the outputs of this AND gate 426
is applied to the delay circuit 427 and delayed by time TD.
(Fig. 27b) and the other part is applied to the signal line 428.
do. However, (TD<TP) Therefore, from the OR gate 424, the
As shown, the output pulse from the shift register
A pulse signal whose width is further extended by TD is obtained.
It is something that can be done. For example, when the dot size signal is “11”, the character A
If you draw a thick pattern as shown in Figure 24B,
It is something that can earn you a turn. As described above, the outline of the configuration of the recording device according to the present invention is explained.
Now that we have explained the operation in actual use, we will explain below.
Please describe in detail. Please note that in the following explanation
The following explanation assumes that all signal signals are in the “00” state.
Ru. Printing the recording unit 300 before use
Turn on the power switch 220 provided in the control unit 187
to keep the recording unit ready for use.
(The laser oscillator 301 is
By keeping it always on regardless of the
Waiting for the rise transition time of the laser oscillator 301 in vain.
It is something that can be avoided. ) Next, on the operation panel 219
Turn on the power switch of the control unit 10.
1 is in the standby state. Simply providing information on such conditions
The output of unit 100 is sent out from the unit.
When recording according to control signals, start
When switch 293 is pressed, this switch signal is the main control
applied to circuit 130 to form a start signal.
is applied to the magnetic tape control circuit 104 and supplied.
From the tape in unit 100, the next program
The control signals to and from the ram are read and the instruction
Yon register (general term for 115-119)
) respectively. Also, as mentioned above, do not press the start switch directly.
Before that, specify the ID and turn on the search command switch 29.
When you press 2, this ID information is sent to the main control circuit 130.
ID register 1 is stored by comparator 225.
Until these two match compared with the contents of 15.
Move only the tape and stop the tape at the matching stage.
Stop. You can also specify the number of copies with a switch.
However, according to the information in the multi-register 116,
or enter the number of copies from the panel.
Automatic-manual switch 295 to prioritize the number of sheets
It is formed so that it can be selected. As mentioned above, modes, functions, and reductions
Determine the control signal read into each register.
In which PBF should character information be stored?
This control signal is used to determine the
If the character information belonging to the number is fluctuating data and
If the reduction control signal indicates that a full print should be made,
The write control circuit 126 controls the gate 120.
and also controls the address counter 124,
PBF122-1 has text information (text) on this first page.
(including size information). 1st
Once you have finished writing the text information on the page, turn on the writing system.
A termination signal is sent from the control circuit 126 to the main control circuit 130.
The circuit 130 then outputs a magnetic tape control circuit.
Give a reading stop command to 104 and read the data.
Stop dispensing. Also, the main control circuit 130 is connected to the PBF122-1.
Receives a completion signal to notify that writing has been completed.
By the process, a read command is given to the read control circuit 131.
The address counter 124 is controlled by the circuit 131.
The first line of the first page of stored information
Start reading information. Here, in the first line
A, B, C,...N and 136 in font size "medium"
If the character code of is stored, reading
A control circuit 131 controls the registers 117, 118,
119 and converts the size information into a size label.
A control signal is applied to the gate 137 to apply to the gate 138.
Apply. Stored in the size latch like this
The data is decoded by the decoder 142.
This decoded information is then passed to the clock generator and
and a counter to control them. this
When the signal lines 144-1 and 144-2 are used, there is a reduction printing command.
Since no signal is applied, the medium font size information
is decoded as a medium character size.
That is, the vertical clock generator 149 is converted to a horizontal clock.
such that a digit end signal is derived every pulse 18, and
The number of clocks included in the recording area of one scanning line, the actual number of clocks included in the recording area of one scanning line,
In the example, 2448 clocks, converted to Chinese characters is 136
The end of the scanning line is reached every time the clocks corresponding to characters are counted.
The line counter 147 is
The scan line end signal is equal to the scan lines that make up one row.
In the case of numbers, i.e., in the case of medium characters, a line end signal is sent every 30 counts.
such as outputting a signal and applying it to the control circuit 131,
In addition, the character generation circuit 150 has a function for selecting a medium character.
Also, the register 279 of the change circuit 152 has
The complement of “12” is applied from the middle character complement circuit 281.
control as per Once reading of such size information is completed,
The coded information of A, which is the first letter,
However, before reading, the address
The counters 205 and 206 of the counter 124 are
Since the output line 200 in Figure 11
PBF122-1 at the first clock pulse obtained
Read data A into the data latch 141,
This read information is used as the middle character of the character generator 154.
is applied to terminal 156. At this time, line counter 14
7 is cleared and is in the "1" state. Therefore, on output line 159 of character generator 154,
A signal indicating the first scan line is applied, but the first
As is clear from Figure 5, the adder 279 has
The complement from the middle character complement circuit 281 is applied.
The carrier is applied to the character generation circuit 150 in order to
Therefore, the dot appearance in Fig.
“0” is output for D1 to D14 of the line of force 158.
It is something. Furthermore, the blank area forming circuit 167 operates.
Therefore, the dot output lines D15 and D18 are also “0”.
is applied, and as a result, the shift register 165
1st stage to 18th stage (reading side is the 1st stage)
0 is set to 0. This set
At the same time, the first stage signal is read out.
is applied as a modulation signal to the modulator 303.
However, the beam is blocked and does not hit the photosensitive drum.
stomach. Note that the beam is applied when a 0 signal is applied to the modulator 303.
It is cut off when the signal is applied, and passed when the signal is applied.
It shall be. Also, the dot size signal
For “01”, “10”, and “11”, change the size of the dot.
As mentioned above, in order to
Force pulses are output from gates 403 and 403-1.
It can be done. After such a state is reached, the laser beam arrives at the next dot position 1/5 Msec later, and also reaches a horizontal point.
lock is applied to shift register 165.
As shown in the figure, each circuit block remains at one dot position even as the beam advances.
No changes occur in the control signals exchanged between locks.
It won't happen. Therefore, the second shift register 165
The “0” of the stage is read out and applied to the modulator.
Ru. In this way, a section corresponding to 18 dots is scanned.
Once completed, the counter of vertical clock generator 149
The digit end signal from the printer B (Figure 16) controls the readout.
The end of the address counter 124 via the circuit 131
child 215 and sets the contents of counter 217 to 1.
is added, the output of register 207 becomes “1”, and
Address 1 of PBF122-1, that is, the first row of the first page.
Control is performed so that two characters are read out. Furthermore, the size is
The size information is still retained in the
So, such size information is controlled by the aforementioned
Circuits such as , remain as described above. In this way, the code information for the second character “B” is
The voltage is applied to the character generation circuit 150, but in the same way as described above.
1st stage to 18th stage of shift register 165
“0” is stored in the stage, and these are stored in the horizontal pattern.
synchronized with the horizontal clock.
It modulates a moving laser beam.
Ru. In this way, reading the 136th character is
Once finished, move the vertical cross as shown in Figure 16.
A counter A included in the clock circuit 149 determines the end of the scanning line.
A completion signal is applied to the line counter 147 and its contents are
becomes “2” (meaning the second scanning line) and
, scan the terminal 216 of the address counter 124.
Apply the line completion signal to read the contents of the counter 206.
Set to “0”. At this time, the contents of the counter 205 depend on
Naturally, it remains 0, so the first row of the first row
Start reading the character information of the character. Size information
The information is read when reading the first scan line.
Since it remains closed, it cannot be controlled by size information.
The contents of the circuit do not change, but the line counter 1
Only the content of 47 has changed from 1 to 2.
be. This second scanning line also has 1
Read the character information of the line sequentially, and read the last N character.
When reading and scanning are completed, the scan line end signal is sent again.
The number is printed on the line counter 147 from the vertical clock circuit.
Add. Repeat the reading of the first line in this way and start the 6th run.
When the reading of the information regarding scanning lines is completed (immediately
Then, the reading of the characters in the first line is completed 6 times.
) A line scanning end signal is applied to the line counter 147.
and change its contents from 6 to 7. After that,
This is the seventh reading, but it takes
In the state, as mentioned above, if it is a medium character, add it to Figure 15.
A carry signal is applied to the character generation circuit from the device 279.
and the output of adder 279 is a character generator.
1st line instruction signal that instructs the 1st line in
The first letter “A” is used to apply a symbol.
When read, D1 to D14 of the character generation circuit have
00000011000000 (arrow indicates shift register 165
read direction) is derived and the shift register
The data is transferred to the shift register and transferred to the shift register.
As mentioned above, “0” is transferred to D15 to D18.
Therefore, the parts of D1 to D18 except D7 and 8 are
It becomes "0". Similarly, the second character
Continue reading B, the third letter C, and the 136th letter N.
After reading out, set the contents of line counter 147 to 8.
After that, read the 1st character again to form the 8th scanning line.
It is something that I will return to. In this scan, the character
A second line instruction signal is applied to the raw circuit 150.
Ru. In this way, the 30th line related to the 30th scan line
Once the reading is completed, the vertical clock circuit
The 30th scanning line end signal from 149 is the line count.
This line counter 147 is applied as described above.
In the case of medium characters, the printer 147 outputs a scanning line end signal of 30
Reset and read by counting
It applies a row end signal to the control circuit 131.
Therefore, the address is read via the read control circuit 131.
This row applied to terminal 212 of counter 124
The end signal sets the contents of the reference counter 205 to 0.
1 and send this count output to the upper register 207.
The output of register 207 by transferring to the digit
is set to 138 (scanning line is always completed along with the line end signal).
Since the signal is applied, the contents of register 217 are 0.
). Therefore, the contents of this address counter 124 are
138, so the first information on the second line, that is, the
This is an instruction to read the size information. Therefore, first set the size information as a size label in the same way as above.
After reading to Tsuchi 138, read the first line
In the same way as explained in , read the second line.
Suppose you repeat the output and the second line is a medium character.
And the second line completes with 30 scan lines as above.
It is. By repeating this scanning, all readings in the 66th line are
When the output is completed, the last character on the 66th line
Read out the page end signal stored in the
1 by ANDing the row completion signals from the counter 147.
The end of the page is detected by the readout control circuit,
Stop reading from PBF122-1. This stoppage is detected and data is read from the magnetic tape again.
Start reading the next page and start reading from PBF as described above.
It reads and records information. In addition, the front
As mentioned above, the dot size detectors 400, 400-
1, the dot size signal is detected for each character code.
The size of the recording dot is changed for each character.
It is something that can be changed. Above, we talked about the case of medium letters, but for uppercase letters
If so, the size latch 138 reads and decodes the
The size information decoded by the first
As shown in FIG.
A is applied to the shift register 165.
The clock frequency is passed through the 1/2 circuit to 1/2
(This means that the same stage information is read twice.
), the vertical clock circuit is
Digits every 18 horizontal clocks (same as for medium letters)
the vertical clock generation so as to derive the termination signal.
149 and generates this vertical clock.
From the box 149, one scanning line is output as in the case of medium characters.
A scanning line completion signal is sent to the line counter 147 every time scanning is completed.
Character generation circuit 150, conversion circuit
152 is also controlled in the same way as for Chinese characters.
However, as shown in FIG.
When font size information is applied, gate B is controlled.
By controlling and passing through the 1/2 circuit, two
As if receiving the scanning line completion signal and counting up by one.
It is designed to be controlled in many ways. That is, in the column direction, the voltage applied to the shift register 165 is
By halving the clock frequency to
In this case, the count of the line counter 147 is doubled.
One dot obtained when it is a medium character is moved in the column direction.
and a total of 4 dots read out twice in the row direction.
and then read it out. For example, as above, 68 sentences in one line, A, B...N.
Read out the information consisting of 33 lines and record it.
If you want to read the size information
After reading the first letter A, press the data latch 14.
1, and the number of character occurrences as in the case of medium characters.
150 to the first stage of shift register 165.
“0” is transferred from the stage to the 18th stage. At the same time as this transfer, the first
Read 0 from the stage and modulate the modulator 303
However, the shift pulse of the shift register 165
Since the frequency is lowered to 1/2, the laser beam
Even if it reaches the position of the second dot, shift register 1
65 is not shifted like in the case of Chinese characters, but remains as is.
I am continuing to read information about the first stage.
Ru. Next, the laser beam arrives at the third dot position
Then, for the first time, the shift pulse is sent to the shift register 16.
5 and the second stage readout is performed.
Ru. When one character is read out in this way,
During this period, the digit end signal is sent to the vertical clock circuit 14 twice.
9 (same as for Chinese characters)
(because they use the same circuit). Continue reading the first line in this way.
After reading the last character of the 68th digit, the 136th digit
When the end signal is sent, the vertical clock circuit 14
9, a scanning line end signal is applied to the line counter 147.
However, this line counter does not contain uppercase size information.
When applied, two scan line end signals
The count increases by 1 starting from
, its contents remain unchanged and direct the first scan
The signal remains as it was derived. Therefore, after the first reading of the first row is completed,
Even when performing the second readout, the first scan
The same information is read out, and the laser beam
Since it is scanning the second scanning position,
In the case of uppercase letters, it is clear from Figure 7 B and C.
One dot of a medium letter is read out 4 times more.
It is something. In addition, in case of upper case size, 70th to 137th, 207th
~275 characters are not read.
Also, as mentioned above, the size of the recording dot is
Detected by size detector 400, 400-1
Based on the dot size signal for each character code
It is subject to change. Next, record lowercase letters with high density information as an example
To describe the case, the write control circuit 126
When the game determines that it is high-density information,
The size and character information are controlled by PBF1.
22, and PBF122-1 to PBF122-4.
One page of high-density information is sequentially written to each page.
control (high density information is 4 times as much information as standard density)
(because it has a large amount). If information is stored in PBF in this way,
Next, the reading instructions are as follows:
As with the case of characters, the size information is first set by the size latch.
138 and decoded by the decoder 142.
This decoded lowercase letter size information is
The digit end signal is output from the vertical clock circuit 149 at the 9th clock.
The vertical clock circuit, as derived for each clock,
149, and the line counter 147 is shown in FIG.
Read the row complete signal at the 15th scan line end signal as shown.
As applied to the output control circuit 131, the conversion circuit 1
52 derives the 6's complement number from the lowercase complement circuit 280
The gate 282 is controlled as shown in FIG.
150 selection circuit 157 is controlled so that character information is small.
As applied to the character generation terminal, the blank area forming circuit
A “0” signal is applied to D8 and D9 from 167.
and high-density information signals.
The response counter 124 counts 276 due to the row completion signal.
Control so that it increases. In the figure, the address where the 276 counts are uploaded is shown.
Although the details of the register are not shown,
This means that the register 207 contains the reference counter 205 and the phase
Similarly to the pair register 206, further 276 counts are added.
A reference counter and relative counter for high density are provided.
After determining that the density is high, the two
Switching the counter to the counters 205 and 206
It is only necessary to configure it so that it can be used. The first line of the page with this high-density information to be printed
If the character information is "A, B...N",
After reading the size information as described above, the first character
When A is read, this information is passed to character generator 154.
D1 to D7 of the shift register 165
(the first 6 runs due to the function of the conversion circuit 152)
(because the scan line is formed as a blank area), and D8, D
Since “0” is derived from 9 as described above, the shift register is
“0” is stored in the 1st to 9th stages of the star 165.
is read out sequentially by printing on the horizontal clock.
The laser is moving in synchronization with this clock.
The beam receives information read out from the shift register.
It is modulated depending on the information. The digit end signal is read at the end of the 9th horizontal clock.
Address counter 1 via output control circuit 131
24, so the content of the relative counter is 1.
The second character is counted up and the second character is read out.
command. Based on this directive, the second character
It is read out in the same manner as described above. In this way, the 272nd
After reading the th character, the vertical clock circuit 14
9. A scanning line end signal is sent to the stranded line counter 147.
At the same time, the readout control circuit 131
sent to the dress counter 124 and clocks the relative counter.
command to read the first character of the first row again.
Ru. In this way, the 15th reading of the character information in the first line is completed.
When the extension is completed, the line counter 147 indicates that the line is complete.
The completion signal is sent to the address via the read control circuit 131.
is applied to the counter 124 to indicate the contents of the reference counter.
1, advance the contents of register 207 by 276,
Number of characters equivalent to one line of address counter contents
Proceed only. Therefore, the address counter 124 is
This indicates the address of the first character on the second line. Repeat the above reading to find the top of the 132nd line.
The subsequent read is completed and the row complete signal is output to the line counter.
output from the printer 147 and the above-mentioned page end signal.
Detects the end of one page by detecting that it has been read.
It is something to do. Also, as mentioned above, the dot size
Dot size information is obtained by detectors 400 and 400-1.
The code is detected for each character code, so the recording dot
The size of the text is changed for each character. Above is PBF122 for printing large, medium and small characters.
-1 was explained in detail, but the previous
In the eight combinations of control signals described in
As shown, address counter 12 from PBF121
When reading fixed data using PBF12
From 2-2 to 4, address counter 12 for reduced printing
When reading out fluctuation data using 5, each
Data reading is done in the same way as described above.
It is something that can be done. Next, we will explain the reduced printing mode in detail.
Ru. This reduced printing is done as outlined in Figure 9C.
It is easy to print 4 pages of information on 1 page of recording paper.
In this figure, PBF122-1
~4 respectively all pages A, all pages B, all pages C, and all pages
The case where information of D is stored is shown. On the magnetic tape, the nth block has a Chinese character.
All pages A are in uppercase letters in n+1 block, all pages B are in uppercase letters,
All pages C in capital letters in n+2 block, and n+
The information of all pages D of Chinese characters is stored in block 3.
The control signal for each page was instructing reduced printing.
Then, the write control circuit 126 writes data from the magnetic tape.
This reduced printing command is detected when reading the information of
and send the second block to PBFF122-1, n+
1st block to PBF122-2, n+2nd block
block goes to PBF122-3, and n+3 block goes to PBF122-3.
Address counter as stored in PBF122-4
124. (The address counter 125 is
It is read-only. ) However, the block mentioned here is
This is the form in which the first record of the control signal is removed.
Ru. Wait for the end of such writing and then start reading.
In other words, the address counter 125 is PBF12.
It can only be used for reading 2-3 and 4.
Therefore, the address counter 124 is
is used only for reading PBF122-1~2.
It is something that In the case of reduced printing, also from Figure 9 C.
As you can see, one scan line writes two pages of information, and
The seam of this page, between A and C in the figure, or
Since there is no special blank space between B and D,
When recording character information located on the right side of
is one where there is no time to read the size information.
It is. Therefore, in this example, the
Prior to reading information, the read control circuit 131
is included in the beam detector 318 and the output of the beam detector 318 is applied.
the period from when the beam leaves the non-recording position.
The 5MHz recording clock (12th
The counter (the waveform of which is shown in the figure) counts the
(as shown), the time before the beam records information.
A certain clock, e.g. CP in Figure 12
1 (Mth clock after beam detection)
is applied to the address counter 125 and PBF122
- reads the font size information in the first line of 3.
Then, the gate 137 is controlled to close the size latch 13.
This size information is stored in 9. Information stored in the size latch 139 in this way
is decoded by the decoder 143
However, a reduction printing command signal is applied to the signal line 144-2.
is actually captured in the decoder 143.
Although the size information provided is in uppercase
, decoded as a medium character, which is the size one step lower.
Then, the line counter 148 is set according to the middle character information.
Control as described above. Next, the clock pulse following the aforementioned clock pulse is
By Rus CP2, the first line of PBF122-1
The size information is read out, and along with this, the gate 13
7 is controlled and the size information is transferred to the size latch 13
Store in 8. This size information is sent to the decoder 142
It is decoded by the signal line 144-1.
Since the reduced printing command signal is being applied, the readout is not possible.
The information entered is in medium letters, but it can be changed to lowercase letters.
Decode and further set the line counter 147 to lowercase letter information.
control according to If you read out the size information in this way,
Next, the first character of the first line of PBF122-1 is
While reading the character information to the data latch 141,
Then, the read control circuit 131 controls the gate 145.
horizontally by controlling the lowercase letter size information of the decoder 142.
Clock generator 166, change circuit 152, character generator
applied to the raw circuit 50 to print the lowercase letters mentioned earlier.
Control each in the same way as in the case of . However, in this case
Unlike the case of high-density information, one line (2448 clocks)
The line ends in the middle of ``Tsuku'', so don't paraphrase it.
It is the 1224th clock after printing started.
The printing of the line containing the page is completed, so the write control circuit
With said counter C included in path 126,
Detects the 1224th clock after printing starts,
Write control circuit for this clock CP3 in Figure 12
131 to address counter 1.
Stop applying the control signal to the address counter 24 and
This command instructs the printer 125 to start reading. In this way, the reading of the first line of PBF122-3
This is the start of reading.
In addition, the gate 145 receives size information of the decoder 143.
is controlled to apply information on signal line 144.
The horizontal clock circuit 149, the conversion circuit 152,
The character generation circuit 150 is controlled according to the size information.
It can be done. Therefore, the character information is sequentially sent to the data latch 141.
By reading, the data is recorded sequentially in Chinese characters.
It is. In this way, the first line of PBF122-3
When the first scan line of
The scanning line is sent to the line counters 147 and 148 from the path 149.
Apply end signal and count each line counter by 1
It's something that makes me excited. Such a scan line end signal is
Relative counters of each address counter 124, 125
This is applied as a signal to clear the counter.
Therefore, the initial address of each counter is
This will restore the condition. Therefore, from PBF122-1 again, the first line
Read the second information and then PBF12
Reading the second information on the first line from 2-3
and then continue such reading.
Ru. In this way, the reading of the 15th scanning line is completed.
Then, by applying the scanning line completion signal, line counter 1
A row completion signal is sent from 47 to the read control circuit 131.
is applied to the address counter 124 via
The corresponding number of characters (138) is counted up, and the readout instruction is
Specify the fixed address in the first character of the second line. child
When , the line counter 148 remains in the same state.
This is what we are doing. For reduced printing, size information in PBF122
There should be no lowercase font size (if there is, an error will occur)
address register).
The star counts up to 138 due to the row completion signal.
Control in advance. Therefore, in the scanning of the 16th scanning line
, read the information on the second line from PBF22-1.
From PBF122-3, the information on the first line is
This is to execute reading. In this way, the scanning of the 990th scanning line is completed.
(Printing of the first and third pages will be completed at this point.)
) and the scanning line completion signal are sent to the line counters 147 and 147, respectively.
148 and receives a row completion signal from each counter.
signal is applied to address counters 124 and 125.
So, the address counter is PBF122-2,122
-4 Specify the first address on the first line. In other words, the addresses of PBF122 are 122-1 to 122-4.
Since they are provided consecutively, you can simply
Only advances the address by one line in PBF
You can then start reading the information on the next page.
It is something. In the above explanation, in reduced printing, PBF
One page of information is stored in each of 122-1 to 122-4,
A device that records a total of 4 pages of information on 1 page of recording paper.
However, as shown above, the information for 4 pages that should be reprinted was
If it is on magnetic tape, read 4 pages onto PBF.
However, even if it is less than 4 pages, the program
At the end of the program, it is possible to perform a reduced printing.
Ru. For example, suppose there are 3 pages left in the program.
and read these three pages of information into PBF122-1~3.
276 characters of the 34th record on the 3rd page of the incorporation
indicates the end of the program, the remaining PBF
122-4 automatically sets L as the font size,
This inserts an invalid code as character information.
Ru. By inserting invalid code like this, PBF
The previous data held in 122-4 will be deleted.
3 pages of reduced prints and 1 page of blanks.
It is formed on recording paper. In order to insert invalid code like this, write control
The circuit 126 is provided with an invalid code generator,
When the end of the program is detected, the write control circuit 12
6 applies the code signal to the distributor 108.
Then, this signal is passed through the gate to PBF122-4.
It is something to write. As described above, according to this embodiment, the program
At the end of the process, 4 pages of information had not been stored.
However, if you insert invalid code into the remaining part and compress it
It is capable of printing. Incidentally, as mentioned above, the dot size detector 400,
400-1, the dot size signal is determined by each character code.
It is detected for each dot, and the size of the recorded dot is
It can be changed for each character. Next, read the two character information at the same time and read this
The beam is modulated according to the read information and two
Learn more about overprinting, which prints information on top of each other.
Explain. As mentioned before, in this example, PBF1
21 and 122, and each can be accessed independently.
Since it has an address counter for
Something that can read information simultaneously from PBF
It is. Until now, the data to be recorded was PBF12
I have only detailed the case where it is stored in 2, but before
As mentioned above, data read from magnetic tape
Functions are fixed data in
, the write control circuit 126
The character and size information of the data is
This is stored in the PBF 121. The next data read in this state will be the variable data.
This variation data
is stored in PBF122, but it cannot be read.
The control circuit 131 controls the superposition of this fluctuating data.
Function register 1 indicates whether the
Discriminates and detects the contents of 18 and instructs superimposition.
If not, use only the PBF122 fluctuation data.
When instructing to read out or superimpose
Read the contents of PBF121 and PBF122 at the same time
It is something. PBF121 and PBF122 to simplify the explanation
- If standard density information is stored in 1, it will be read.
Reading of superimposition command in control circuit 131
Therefore, address counters 123 and 124 are set simultaneously.
and start reading synchronously.
It operates similarly to shift registers 184 and 165.
The information is stored in these two shift registers.
synchronously read out the information of
The OR output of is formed by a video information generator, and this OR output is
Since the modulator is controlled by the output, the laser
The beam modulator is driven by the OR output of both PBFs.
It is something that In addition, here PBF121, PBF
Regarding reading individual information from 122-1, please refer to the explanation.
Although not explained in detail, such read operation itself was previously explained.
The behavior is exactly the same as described, just scan lines at the same time.
and in that the dots are read out synchronously.
This control differs only in gates.
174 and 137 at the same time, and
Horizontal clock generators 166 and 188 generate recording clocks.
receive the same clock signal from the clock generator.
It can be implemented by having a Figure 19 illustrates the superposition described above.
For example, PBF121 has a number as shown in a.
Make sure to memorize the capital letter A only as the first character of each line.
For PBF122-1, enter up to the second character of the first line.
The first line is not used and is indicated by b.
Suppose we have stored information called B.
By superposition, the OR output of both PBFs as shown in c is obtained.
power, i.e. the first row is A _BBB …… _B consists of other
I can get a record where the line consists of BBBB...B.
It is something that Note that this is not the case for normal printing as in the above example, but for reduced printing.
Overlapping can also be done in printing.
It is. However, in this case, increase the font size of PBF121.
When it is a letter, it becomes a medium letter, and when it is a middle letter, it becomes a lowercase letter.
The readout control circuit 131 converts the decoder 1 into
77, and each of PBF122-1 to 4
Like reading PBF121 in synchronization with
Reading the first scanning line of the first row of PBF122-1
The first scanning line of the first row of PBF121 is synchronized with
Read, then the first run of the first row of PBF122-3
The first row of PBF121 is synchronized with the scanning line readout.
Read out the first scan line, then read out the first scan line of PBF122-1.
PBF12 in synchronization with the readout of the second scanning line of one row.
Read the second scanning line of the first row of 1, and so on.
The shift register 165,1
It modulates the modulator with the OR output of 84 outputs.
be. Figure 20 shows the overlap in the case of reduced printing as described above.
For example, PBF12
1 has a capital letter A in the first character of the first line, PBF122
-Each of numbers 1 to 4 is in bold except for the 7th character in the first line.
If the letters B, C, D, and E are stored,
As shown in Figure 20, the first character of the first row of each page of four pages
, A is inserted and recorded.
Incidentally, as mentioned above, the dot size detectors 400, 4
By 00-1, the dot size signal corresponds to each character code.
The size of the recording dot varies depending on the size of the recording dot.
It can be changed for each character. Note that in the above embodiment, the flip-flop
285 reset output and shift register 165,
Alternatively, the OR output of the output of 180 is sent to the modulator 303.
However, the flip-flop
If the set output is derived from the step 285, this
set output and the shift register 165 or
180 and the output of the modulator 30
3, so the point is to apply both
It is sufficient to modulate the modulator 303 using the logic output.
It is. In addition, in the above example, leftmer
A counter 195 as a means for defining the gin.
Alternatively, a circuit like the one shown in Fig. 13 was used, but
Such a counter is required to operate as a timer.
Therefore, such a counter can be used as a time constant circuit.
formed by and constant from the arrival of the trigger input signal
Even if you replace it with a timer that derives the clock output after a certain period of time,
Similar effects can be obtained. In such a case, the counter 195 in FIG.
and the set output of flip-flop 191
is the trigger input signal, and the clock output is the AND game.
A timer including a time constant circuit as shown in FIG.
The fixed time of this timer is set to
Counter 195 outputs a fixed number of pulses from frequency divider 192.
The time should be equal to the time to count the number of times. In addition, this
The time constant of the timer including the time constant circuit of
By configuring it so that it can be
Similar to making the count value of the counter 195 variable.
Of course, it is effective. In addition, in the above embodiment, the main clock of 80MHz
A frequency divider 192 that steps down the frequency to 5MHz is used as a beam detector.
Drive with the output of 318 to detect the position of the moving object
However, the present invention is not limited to such embodiments.
For example, in conjunction with the 80MHz main clock,
Locked Oscillator with 5MHz resonant circuit
the output of the beam detector 318.
You can do it as you like. Furthermore, like this
In addition to detecting the beam position, the recording needle
The position of other moving objects such as
It is something that As explained above, according to the present invention, a simple configuration is possible.
The dot size can be made variable and the information can be
This makes it possible to record information in a preferred format.
be.

[Brief explanation of the drawing]

1A, B, and C are block diagrams showing a recording apparatus to which the present invention is applied, FIG. 2 is a perspective view showing an outline of the recording unit in FIG. 1, and FIG. 3 shows the actual configuration of the recording unit. FIG. 4 is a side view of the main parts of the recording unit to show the recording system, FIGS. An equivalent circuit diagram of the main part of the recording unit; FIGS. 7A, B, and C are explanatory diagrams showing characters formed on the recording medium;
8A and 8B are explanatory views showing how information is recorded on magnetic tape, FIG. 9 is an explanatory view showing how information is recorded on recording paper, and FIG. 10A is an explanatory view showing how information is recorded on a magnetic tape. FIG. 10B is a block diagram showing the character generation circuit in more detail, FIG. 10B is an explanatory diagram showing the characters formed by the beam in more detail, and FIG. 11 is a block diagram showing the recording clock generator in FIG. 1 in more detail. 12 is a signal waveform diagram for explaining the operation of the recording clock generator, FIG. 13 is a block diagram showing another embodiment of the counter 195 in FIG. 11, and FIG. 14 is a diagram showing the address counter in FIG. 1. 15 is a block diagram showing the changed circuit in FIG. 1 in more detail. FIG. 16 is a block diagram showing the vertical clock circuit in FIG. 1 in more detail. 17 is a block diagram showing the horizontal clock generator in FIG. 1 in more detail, FIG. 18 is a block diagram showing the line counter in FIG. 1 in more detail, and FIGS. 19A, B, C and 20 The figure is an explanatory diagram to explain overprinting, Figure 21 is a top view of the main parts of the recording unit to explain beam irradiation in the recording unit, and Figure 22 is a layout diagram showing the arrangement of Figures A, B, and C in Figure 1. , Figure 23 A, B, C and 2nd
4A to D are explanatory diagrams showing recording patterns, No. 25
The figure is a block diagram showing the main parts according to the present invention.
6 is a diagram of signal waveforms in each part of FIG. 26, and FIG. 27 is a diagram of signal waveforms at each part of FIG. Here, 100 is an information provision unit, 101 is a control unit, 121, 12
2 is a page buffer register, 123, 124,
125 is an address register, 126 is a write control circuit, 131 is a read control circuit, 150 and 182 are character generation circuits, 165 and 184 are shift registers,
186 is a recording clock generation circuit, 191, 285
is a flip-flop, 192 is a frequency divider, 195,
198 is a counter, 196 and 199 are AND gates, 286 is a delay circuit, 303 is a modulator, 400
is a dot size detector, 401 is a pulse width converter, and 403 is a gate circuit.

Claims (1)

[Scope of Claims] 1. A memory storing an array of pixel information, a clock pulse generating means for generating clock pulses for reading out pixel information from the memory, and pulse signals of mutually different widths synchronized with the clock pulses of the clock pulse generating means. and a control circuit that outputs a recording pixel signal based on an AND condition of the pulse signal and the pixel information signal from the memory, and the control circuit adjusts the pulse width according to the signal representing the dot size. 1. An information recording apparatus characterized in that the apparatus is configured to select pulse signals having different values, and records an image by changing the dot width per pixel according to a signal representing the dot size.