JPS5956263A - Disc device - Google Patents

Abstract

PURPOSE:To start storing information from a prescribed track in the halfway position of a disc by storing a compensation scale number from the initial position of a scale to the detection of an innermost or outermost track and compensating a scale value corresponding to a prescribed track number with the compensation scale number when information is stored initially on the disc and moving a head to a position corresponding to this value. CONSTITUTION:A control circuit 54 allows a laser oscillator 42 to output a reproducing beam light; and when it is focused onto the innermost track, the reflected light from the track on an optical disc 19 is led to a photodetector 49, and respective output signals of photodetectors 491 and 492 are supplied to an adder 50 and a differential amplifier 51, and a signal corresponding to the sum of both outputs and a positional slippage signal corresponding to the difference between both signals are outputted. When an eccentric quantity detecting circuit 52 detects eccentricity, these signals are used as signals for direction and track. This eccentricity is stored in an address corresponding to signals of a reference position detector 36 and a position detector 35 in a storing circuit 53, and eccentricity compensation data is stored in the storing circuit 53 for each sector of the optical disc 19 divided to 32 sectors.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a disk device that stores or reproduces information on an optical disk in which information is stored, for example, in a circular or concentric pattern.

[Technical background of the invention]

In recent years, image information such as documents, which are generated in large quantities, is photoelectrically converted by two-dimensional optical scanning, and this photoelectrically converted image information is used as an image recorder. Recently, optical disk devices have been used as image storage devices in image information file devices that can store images in the device, retrieve and reproduce them as needed, and reproduce and output them as hard copies or soft copies.

Conventionally, such optical disk devices have used an optical disk that stores information in a spiral or concentric pattern, and an optical head that is moved in the radial direction of the optical disk by a linear motor is used to store or store information. Life is about to take place.

[Problems with background technology]

However, in the above-mentioned apparatus, image information is stored from the innermost track, and no one has been considered that can start recording image information from a predetermined track in the middle of an optical disc.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its object is to provide a disk device that can start storing information from a predetermined track in the middle of the disk.

[Summary of the invention]

This invention stores the number of correction scales from the initial position of the scale until detecting the innermost track or the outermost track, and moves the slider corresponding to a predetermined track number when initially storing information on the disk. This is what I did.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to all the drawings.

FIGS. 1 and 2 show the configuration of an image information file device according to the present invention. That is, 1 is a main control unit, a CPU 12 that performs various controls, a main memory 13, a pack memory having a storage capacity corresponding to at least one unit (manuscript - page) of images (for example, page Pamphlet 14, a compression/expansion circuit 15 that compresses (reduces redundancy) and expands image information (returns reduced redundancy), and an f-turn in which pattern information such as characters and symbols is stored. generator 16,
, a display interface 17, and a title memory 18 that stores search data read from a floppy disk 28, which will be described later. 2° is a reading device, for example, a two-dimensional scanning device, which scans the original (document) 21 two-dimensionally with a radar beam light to scan both images IP! on the original 21. It is used to obtain electrical signals according to the information received. 22 is an optical disk device, which is connected to the two-dimensional scanning device 2o.
The image information read by and supplied via the main control device 11 and the index information created by the main control device 11 are sequentially stored on the optical disk 19.

As shown in FIG. 3, the optical disk 19 has a circular substrate made of, for example, lath or glass, and a metal coating layer such as tellurium or bismuth coated in a donut shape on the surface of the substrate. A notch, that is, a reference position mark 191, is provided near the center of the metal coating layer. The optical disc 19 also includes a blank area 19a for reading eccentricity correction data sequentially from the innermost track, an identification code storage area 19b for storing an identification code given at the time of factory shipment, and a floppy disk 28 to be described later. Completion data storage area 19c1 that can store data given when the identification code is stored in 1. First dummy data storage area 19d for cueing the image information storage area 19e.
1 Image information 1. An area 19e1 and a title dump list storage area 19f for storing image IW information of search data are provided. Further, as shown in FIG. 4, the optical disk 19 is divided into 32 sectors "0 to 31" with the reference position mark 191 being 0.

On the other hand, 23 is a keyboard for inputting unique search codes and various operation commands corresponding to image information. Reference numeral 24 denotes an output device such as a cathode ray tube display device (hereinafter referred to as a CRT display device) which is a display section, and an image 'Ili? It displays search codes, image IN information, etc. read from the optical disk device 22 and supplied via the main control device 11, and has a large meaning in conjunction with the display interface 17 in the main control device 11. It constitutes an image IN information display device. 25 is a storage device which stores image information read by the two-dimensional travel device lt and supplied via the main control device 1, or read from the optical disk device 22 and sent to the main control device 1.
The search data, image information, etc. supplied through the hard copy 26 are outputted as a hard copy 26. 27 is a Flo2P disk device, and the above key? - stores search data on the floppy disk 28 for each piece of image information, consisting of a search code entered into the code 23 and a storage address on the optical disk 19 where the image information corresponding to the search code is stored; It is. An identification code storage area 28a is provided on the floppy disk 28 to store an identification code.

FIG. 5 shows the structure of search data.

That is, the number of search digits is made up of, for example, a 20-digit search code divided into six items at maximum and five-digit address information. The above address information consists of 1-digit image information length (sector number) L, 2-digit image information storage track address (track number) T-ADH, and 2-digit image information storage sector address 5-ADH. There is.

FIGS. 6(n) and 6(b) schematically show an optical disk device 22 of the present invention. In other words, the optical disc ty (tJ, turntable 3) is placed and fixed on it.
Ru. The turntable 31 is directly connected to a motor 33 via a rotating shaft 72, and is driven to rotate by the motor 33. The reference position detector 36 detects the mark 191 at the reference position f on the optical disk 19, and is, for example, a well-known photodetector comprising a light emitting element and a light receiving element.

Further, on the back side 81 of the optical disc 19, an optical head 41 for recording and copying data is mounted on the optical disc 19.
is provided so as to be movable in the radial direction. This optical head 41 includes a semiconductor Rade oscillator 42 that generates Rade beam light, a collimating lens 43, a beam sinter 44, a galvanometer mirror 45, a λ/4 wavelength plate 46, an objective lens 47, a convex lens 48, and a laser beam from an optical disk 19. Light receiving element 491r49 that receives reflected light and performs photoelectric conversion
It is composed of a two-split light receiver 49 consisting of two parts, etc. The light receiving element 491.

The outputs of 492 are respectively supplied to adders 50 and 71, and also to a differential amplifier 51.

The output of the adder 50 and the output (tfi shift signal) of the differential amplifier 51 are supplied to an eccentricity detection circuit 52.

This eccentricity detection circuit 52 includes an adder 50 and a differential amplifier 51.
A track (groove) that traverses the optical disk 19 according to the output of
It detects the signal corresponding to the direction and the amount of eccentricity of the directional knob.

Further, the output of the eccentricity detection circuit 52 is supplied to a memory circuit 53, and this memory circuit 53 is connected to the base coating position detector 3.
6 and the output of the position detector 35 are supplied, as well as a mode switching signal from the control circuit 54. When the storage circuit 53 is in the eccentricity storage mode, the period from when the reference position detection signal is supplied until when the next detection signal is supplied is divided into 32 sectors by the detection signal of the position detector 35. Eccentricity amount (eccentricity correction data) A signal and direction corresponding to the track (groove) crossed by the toe are stored. Furthermore, the storage circuit 53 outputs the stored eccentricity correction data in synchronization with the detection signal of the position detector 35 in the recording and reproduction modes.

Further, the output of the adder 71 is supplied to a binarization circuit 72, and this binarization circuit y? ! The signal binarized by r72 is demodulated by a demodulation circuit 73 and supplied to the control circuit 54.

The output of the storage circuit 53 is supplied to a control circuit 54.

This control circuit 54 controls the entire optical disk device 22 in response to signals from the CPU 12. For example, the control circuit 54 controls the output signal from the storage circuit 53 or the output signal from a comparator 87 (described later) to a side converter. By supplying the signal to the linear motor driver 56 via the signal line 55, the drive control of the linear motor driver 56 is performed. Also, the control circuit 54? 'i When it is determined to record the first dummy data, the movement of the optical head 41 is controlled by 64 tracks while outputting a dummy data recording signal. The 64 tracks of dummy data are stored in the image information storage area 19 during storage and playback.
This is done to cue the beginning of m. The linear motor driver 56 moves the optical head 4 using a linear motor 81 (described later) in response to a supplied signal, so that the beam light from the optical head 41 always tracks and irradiates all of the required tracks.

Further, the output of the differential amplifier 51 is supplied to a galvanometer mirror driver 58. This galvano mirror driver 5
8 drives the drive coil 45Mf of the galvano mirror 45 in response to the positional deviation signal from the differential amplifier 51, and by rotating the galvano mirror 45, accurate positional deviation detection and track tracking based thereon are performed. It can be done. That is, the rotation of the lupano mirror 45 is operated based on the eccentricity correction data, and the amount of eccentricity that cannot be completely corrected by the near motor mechanism is tracked.

On the other hand, the modulation circuit 611 outputs dummy data after performing MFM on one page of image information supplied from the above-mentioned peso-puffer 14, or outputs dummy data. A modulator 62, a pattern generator 63 that generates a dummy signal, a track number generator 64 that generates a track number, and an AND circuit 65.
, and an OR circuit 66.

That is, the modulator 62 modulates the recording data supplied from the output buffer 14 or the track number from the track number generator 64 in accordance with a control signal from the control section 54, and this modulation signal is transmitted via an OR circuit 66f. It is designed to be output. Also, the main turn generator 63 outputs dummy data in response to a control signal from the control unit 54, or performs an OR circuit using the track number supplied from the AND circuit 65 in response to a control iMI signal from the control unit 54. It is configured to output via 66.

The output signal of the modulation circuit 61 and the output (N) of the υOR circuit 66 are supplied to a radar driver 67. This radar driver 67 drives and controls the laser oscillator 42 according to the supplied data. be.

The optical head 41 is directly moved in the radial direction of the optical disc 19 by a DC linear motor 81 that is composed of a movable part and a fixed part. Optical scale 8 fixed to the movable part
2, its position is detected by a position detector 83. The position detector 83 outputs two types of detection signals having different phases in accordance with the movement of the movable section pick-up optical head 41 using a so-called overlapped grid detection method. The output of the position detector 83 is the signal processing circuit 8
4.

This signal processing circuit 84 obtains multi-position signals by performing predetermined signal processing on the output signal of the position detector 83. position according to the detection signal]? The pulse generating circuit 85 generates a pulse, and the counter 86tlC counts up or down depending on the pulse of the pulse generating circuit 85.

The output of the signal processing circuit 84, ie, the scale value of the counter 86, is supplied to a comparator 87.

This comparator 87 compares whether the scale value of the counter 86 and the contents of an adder 91, which will be described later, match. The output of the comparator 82 is supplied to the control circuit 54.

Further, the innermost track detection number 44 from the control circuit 54 is supplied to a correction scale register 88, and this correction scale register 88 is supplied with the scale value from the signal processing circuit 84 indicated by η.

The correction scale register 88 stores the scale value from the signal processing circuit 84 as a correction scale value when the innermost track detection signal output from the control circuit 54 is supplied. On the other hand, the track arrival number from the control circuit 54 is supplied to the scale conversion section 89. The scale conversion unit 89 obtains the scale value by calculating [truck notification number x track pitch (3 μm) ÷ scale pitch (32 μm)]. The output of the scale converter 89 is supplied to a designated scale register 90, and the output of this register 90 is supplied to an adder 91.
The output of the correction scale register 88 is also supplied to this adder 91 . The adder 91 uses the scale value of the specified scale register 90 and the correction scale register 88.
This is to add the scale value of .

Next, the operation in such a configuration will be explained. For example, now, turn on the power (not shown), set the optical disk 19 on which no image information is stored in the optical disk device 22, and set the floppy disk 28t'' in the floppy disk device 27. When set to eccentricity memory mode, CP
U 72 supplies its mode signal to control circuit 54 within optical disk device 22 . Then, the control circuit 54 outputs a predetermined signal to the linear motor driver 56 via the D/A converter 55.

Accordingly, the linear motor driver 56 drives the linear motor 8, thereby moving the optical head 41 outward from the innermost circumference. At this time, each time the optical head 41 corresponds to a scale in order from the initial position of the optical scale 82, a signal is outputted from the signal generation circuit 86 in response to a detection signal with a different phase from the detector 83. , the counter 86 is counted and amplified.

However, the optical head 41t'i reproducing beam light is irradiated onto the optical disk 19, and the reflected light t is converted into a short signal and supplied to the adder 71. Then, the output of the adder 71 is binarized by the binarization circuit 72, demodulated by the demodulation circuit 73, and supplied to the control circuit 54. Accordingly, the control circuit 54 detects the innermost track based on the signal from the demodulation circuit 73 and outputs the detection signal to the correction scale register 88. As a result, the correction scale register 88 stores the contents of the counter 86 when the detection signal is supplied as a correction scale value. Also, at this time, the optical head 4
A blank area 79aVC is set for the innermost track.

Next, the control circuit 54 operates the radar driver 67 to output a reproduction beam from the laser oscillator 42, and causes the objective lens 47 to image it onto the innermost track.

The light reflected from the track on the optical disk 19 by this reproduction beam light is guided to the light receiver 49, where the light π is converted into an electric signal, which is transmitted to the light receiving elements 491, 49, . Each output signal is supplied to an adder 50 and a differential amplifier 51, respectively.

Then, the adder 50 outputs a signal according to A1f of both outputs, and the differential amplifier 51 outputs a positional deviation signal according to the difference between the two signals. As a result, the eccentricity detection circuit 52 uses these signals as direction and trunk signals when eccentricity occurs. Based on these signals, the storage circuit 53 stores the eccentricity t- at an address corresponding to the detection signal from the reference position detector 36 and the detection signal from the position detector 35.

Accordingly, the storage circuit 53 stores eccentricity correction data for each sector of the optical disc 19 divided into 32 sectors.
be done.

Therefore, when storing and reproducing image information, the storage circuit 5
In addition, the IJ near motor driver 56f is activated by the eccentricity correction data No. 3, and the optical head 41 is made to correspond to the stored track.

Next, the CPU 12 outputs a control signal to the control circuit 54 to cause the optical head 41 to set the completed data storage area 19ctlC of the optical disc 19. Next, the control circuit 54 operates the dedriver 67 to output the reproduction beam light from the laser oscillator 42.
It is imaged onto a predetermined track by an objective lens 47. The reflected light from the track on the optical disk 19 due to this reproduction beam light is guided to the light receiver 49, where it is photoelectrically converted into an electric signal, and the light is transmitted to the light receiving element 491*49.
Each output signal of 2 is supplied to an adder 71. Then, the output of the adder 71 is binarized by a binarization circuit 72, subjected to F+'jJ by a demodulation circuit 73, and then supplied to the control circuit 54.

As a result, the contents of the completed data storage area 19c are read out and supplied to the CPU 72. And CPU z
When the CPU Z 2 determines that the completion data is not stored in the completion data storage area 19c, the CPU Z 2 reads the contents of the floppy disk ``1. It is determined whether an identification code is stored in the storage contents of the floppy disk 28 stored in the title memory 18, and if it is stored, the error data is supplied to the display interface 17, so that the CRT display device 24 can display the identification code. If the identification code is not stored in the storage contents of the floppy disk 28, the identification code is read from the identification code storage area 19b of the CPU 12n optical disk drive 1g, and this identification code is used as the identification code on the floppy disk 28. Code storage area 28m
At the same time, the completion data is stored in the completion data storage area 19a of the optical disc 19, and then the control circuit 54 assumes that it is storing first dummy data and outputs it to a predetermined track number gold scale conversion section 89. Then, the scale converter 89 converts all the supplied track numbers into corresponding scale values and stores them in the specified scale recorder 90. As a result, the specified scale Renosuke 90
The scale value (!: content of the correction scale register) is added by the adder 9, and the result of this addition is compared with the scale value of the counter 87 by the comparator 87, and the comparison result is output to the control circuit 54. Ru. Therefore, the control circuit 54
is the signal 'i D/A converter 5 according to the comparison result.
5, the linear motor driver 56 is driven. This drives the linear motor 81,
The optical head 4 moves.

Thereafter, when the scale value of the counter 86 and the addition result of the IL adder 9 match, the 1st division circuit 54 stops the linear motor driver 56.

This causes the linear motor driver 56rI'i and the linear motor 81f to stop, thereby causing the optical head 411c to stop.
Make it stop. This corresponds to the initial track of the first dummy data storage area 19d.

Thereafter, the control circuit 54 outputs a control signal to the AND circuit 65 and pattern generator 63.

Then, the Nohira turn generator 63 generates dummy data "55".
and the track number from the track number generator 64 are supplied to the radar driver 67 via the OR circuit 66. The radar driver 67 performs storage by switching the reproduction beam light to the storage beam light according to the supplied signal. Accordingly, the first dummy data storage area 19d of the optical disk 19 contains dummy data "55" and 0.5.
Track numbers are stored for each mg over 64 tracks.

Therefore, when storing the first image information, access to the storage start track is temporarily limited to the dummy data area 19.
After accessing d, it is only necessary to access the corresponding number of tracks, so that access can be performed reliably.

Next, registration (storage) of image information will be described. The key 23 is used to select and set the registration mode, and input the @Hagane code of the image information to be registered. For this, CPU
12, the validity of the entered data is checked (cyclic redundancy check, CRC) according to the predefined search code format based on the number of digits, character type, etc., and the search codes that have already been registered are checked to prevent duplicates. Checks are made to see if the search code has been registered, and if the search code is correct as a result of these checks, it is stored in the main memory 75. Then, the original is set on the two-dimensional scanning device 20, and the CPU Z 2 operates the optical disk device 22 and the two-dimensional scanning device 20. The two-dimensional scanning device 2o two-dimensionally scans the set image IN information such as a document,
Convert photoelectrically. This photoelectrically converted line information is sequentially stored in the page buffer 14.

When the image + ft information for one member is stored in this page buffer 14, the image information is stored in the display ink-face 1.
7, and the image information is displayed on the CRT display device 24. By the way, the CRT display device f
If the image displayed on the rji 24 is satisfactory, a record key (not shown) is turned on. Then, C
The PU J 2 compresses and expands one unit of image information stored in the page buffer 14 for each line information.
Bandwidth compression is performed using the well-known (Modify Hoffma/) conversion, and the compressed line information is transferred to the optical disk device 2.
Supply 2VC. Accordingly, the optical disk device 22 stores the supplied image information in the tracks of the image information storage area 19e on the optical disk 19. That is, the control circuit 5
4 outputs the signal 'i of the track corresponding to the first dummy data storage area 19d to the D/A converter 55. Accordingly, the linear motor driver 56 drives the linear motor 4 by operating the linear motor 8. When the optical head 4 stops, the control circuit 54 reads the track number of that track and outputs the difference track number 4 from the storage start track to the linear motor driver 56.
1 is moved. When the optical head 4 corresponds to the storage start track, the control circuit 54 outputs a control signal to the modulator 62.

The modulator 62 then outputs the track number from the track generator 64 and the information signal f in the sofa I4, one bit at a time, v? Jf3 and supplies it to the led dry/'t67 via the OR circuit 66t-.

The radar dryer 767 switches the reproduction beam light to the storage beam light according to the supplied signal and performs storage.

When the storage of this image information is completed, the CPU J 2 stores the storage address, such as the track number where the image information is stored, the starting sector, and the length of the image, in the main memory 13 in correspondence with the search code.

Next, the CPU J 2 supplies the search data stored in the ML in the main memory 13, that is, the search code, track number, image length, etc., to the floppy disk device 27, as well as a serial number that is the number of times the image information is stored. As a result, the floppy disk device 27 stores the supplied search data and its serial number on the floppy disk 28. After that, other image information operates in the same way, and the optical disk 1
9 is stored in the image familiarization storage area 19c.

Next, a search for image information registered as described above will be explained. First, the key bead 23 is used to set the search mode and the search code is input. Then,
The CPU J 2 sequentially compares and collates the search code with the search codes stored on the floppy disk 28, and sequentially checks whether the search code matches the input search code. For matching search codes,
The track number and start sector number of the Irll1 image information corresponding to the search code are searched. And the CPU
J 2 il: Causes the optical disk device 22 to reproduce the track on the optical disk 19 corresponding to the track number. Then, the CPU 12 supplies the image information (compressed information) from the optical disk device 22 to the compression/decompression circuit 15 for each scanning line, performs band expansion by MHjM conversion, and transfers the image information to the original sound page buffer 4. Next supply. In this way, 11J pages of image IW information were created in the page buffer 14. When all the image IW information is written, the CPU
12 is an interface 16 for displaying the entire image 1a
Either the image information is displayed on the CRT display device 24, or the recording device 25 is made to issue a copy 26 of the image information.

Thereafter, other searches are performed in the same manner.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide a disk device that can start storing 1n information from a predetermined track in the middle of the disk.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and show a schematic structure of FIG. 1 and FIG. 2.
Fig. 3 is a diagram showing an example of storage on an optical disk, Fig. 4 is a plan view showing a division state of sectors according to reference position marks on the optical disk, and Fig. 5 is a storage example of search data. 6(a) and 6(b) are schematic configuration diagrams of the optical disk device. 11... Main control device, 12... CPU, 19...
Optical disc, 191... Reference position mark, 19a...
- Blank presentation rear, 19b...Identification code storage area, 19e...Complete data storage area, 19d...First dummy data storage area, 19e...Image information storage area, 22...Optical disk device, 27...
Floppy disk device, 54...control circuit, 56.
...Linear motor driver, 72...Binarization circuit, 8
1... Linear motor, 82... Optical scale, 83
...Position detector, 84...Signal processing circuit, 87...
・Comparator, 88...Correction scale register, 89...
- Scale conversion unit, 90... designated scale register,
91...Adder. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] a head for storing and reproducing information on a disk, a moving mechanism for moving the head in a radial direction of the disk, and a position detector having a scale corresponding to the position of the disk;
a detection means for detecting the innermost track or the outermost track according to a signal obtained when the head is moved from the innermost or outermost circumference; and a detection signal detected by the detection means from the initial position of the scale. a storage means for storing the number of correction scales until the number of correction scales is supplied; and a storage means for correcting a scale value corresponding to a predetermined track number at the time of initial storage on the disk, and according to the corrected scale value. 4. A disk device characterized in that the disk device comprises a means for moving a position 4λ (strip 1), and is configured such that information can be stored from any track on the DayMeter.