JPH01298375A - Multicolor image display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a multicolor image display device, and in particular,
The present invention relates to an image display device that forms an image by depositing toners of different colors on a belt-shaped recording medium and observes the image.

[Prior Art] A conventional image display device forms an image by attaching toner to the surface of the belt while rotating the belt, which is a recording medium, and displays the image on a large screen. A
O size can be provided relatively easily and at low cost.

This device can be used for meetings, internal bulletin boards, advertisements, etc. by scanning an A4 size document with a scanner and enlarging it to Al size through electrical processing. can. In addition, in this type of device, only one color of toner is used so that the attached toner can be collected and reused, and monocolor development is performed.

[Problems to be Solved by the Invention] However, since the conventional image display device described above displays a still image and displays a monochrome image, it has poor expressive power and cannot emphasize parts or distract the viewer's attention. There was a problem that it could not be used in a similar way. Furthermore, in order to increase expressiveness, it is possible to form images using multi-colored toners, but in that case, toners of different colors will mix with each other during cleaning, and the toner The problem is that it cannot be reused.

The present invention attempts to solve these problems. That is, the present invention provides a multicolor image display device that can display images in multiple colors using toners of different colors, provides rich expressive power, and also allows reuse of toner. The purpose is to

[Means for Solving the Problems] In order to achieve the above object, the multicolor image display device of the present invention includes a recording belt, which is a belt-shaped recording medium, and a recording belt arranged in a direction perpendicular to the rotating direction of the recording belt. row-shaped electrodes,
a toner container, and a plurality of (n) developing sections each carrying toner of a different color, and
storing image information corresponding to the developing section for each side;
and a control means for extracting information from each of the storage means at regular intervals, sequentially performing development by a predetermined amount by the corresponding developing section, and repeating this a plurality of times. It was assumed that they were prepared.

[Function] According to the present invention, the recording belt is divided into fine stripes in a direction perpendicular to the rotating direction, and has a plurality of developing sections carrying toners of different colors. Display can be performed in a plurality of colors by forming images with each developing section while repeatedly making the developing sections correspond to the divided areas in order. In addition, by selectively operating the erasing section corresponding to the divided areas, it is possible to reuse the collected toner.

[Example] FIG. 1 shows the overall configuration of an embodiment of the present invention.

In FIG. 1, 1 is a black conductive magnetic toner;
It is attracted by the rotating magnet inside the non-magnetic cylinder 3, is conveyed over the surface of the cylinder 3, and is guided onto the recording electrode 8i30 provided on the generally upward surface of the cylinder 3.

Similarly, the red toner 2 is guided onto the recording electrode 31 provided on the surface of the cylinder 4.

The recording electrodes 30 and 31 are composed of a plurality of electrodes arranged in a line in the direction perpendicular to the plane of the drawing, and toner adheres to the surface of the recording belt 5 by applying a voltage to the electrodes.

The recording belt 5 is rotated in the direction of the arrow by rollers 11 and 12, and as the belt 5 rotates, a linear recording electrode repeatedly applies toner, thereby forming a two-dimensional image. It will be done.

A fixed erasing blade 6 scrapes off the toner adhering to the recording belt 5 into the toner container 9. 7 is a movable erasing blade, which is rotatable around a fulcrum 8;
It is connected to the plunger 14, and is in the (a) position when the plunger 14 is off, and in the (b) position when the plunger 14 is on. Further, when the blade 7 is in the position (A), it comes into contact with the recording belt 5 and scrapes off the toner on the surface into the toner container 10, and in the position (0), it moves away from the recording belt 5 and removes the attached toner. pass through as is.

15 is a toner conveying belt, and rollers 16 and 17
The toner is hung on the cylinder 4 and conveys the toner to the cylinder 4 side by rotation. 13 is the main body case, on the front of which there is a display section,
It is provided.

FIG. 2 is an electrical block diagram of one of the devices of FIG.

In FIG. 2, 32 and 33 are the recording electrodes 3, respectively.
This is an electrode drive circuit that applies a voltage to a predetermined terminal of 0.31. 34 is a host which is a specifying means, and C
It comes with an RT display, keyboard, etc., and image information read with a scanner etc. is recorded once.

Then, when the operator specifies an area to be output in red, the image is divided into black and red, each arranged into image signals for one screen, and the image signals are sent to the control circuit 35.

38 and 29 are memories for storing black and red image signals, respectively. The control circuit 35 controls each part to form an image on the recording belt 5 from an image signal.

36 is a step motor that rotates the recording belt 5, and although not shown in FIG. 2, it rotates the roller 12 via a gear train or the like, and its single pulse drive causes the recording electrode to move. It is set so that one line of recording is performed. Further, the recording belt 5 is fed by 0.25aI11 with one pulse. 37 is a counter;
One count is added every time the step motor 36 is driven by four pulses. That is, the recording belt 5
1 count is added every time 1 mm advances.

FIG. 3 is a diagram showing the relationship between the length of the recording belt 5 and the count value of the counter 37. Set the recording electrode 30 position to 0.
In this case, the value counted until the position on the recording belt 5 reaches each point is shown.

That is, the recording electrode 31 reaches the position at 100 counts, the lower end of the display at 300 counts, the upper end at 900 counts, and the erase position of the erasing blade 7 at 1700 counts. Also, one lap is 2000 counts.

An example of the operation when displaying an image in the multicolor image display device described in FIGS. 1 and 2 will be described with reference to FIG. 4.

FIG. 4 is one of the flowcharts.

Step S1: The black image signal sent from the host 34 is stored in the memory 3.
8, the red image signal is stored in the memory 39.

Step S2: The count value β of the counter 37 is reset to O.

Step S3 The second step motor 36 is driven, and the recording belt 5 is rotated.

Step S4: The electrode drive circuit 32 is activated, voltage is applied to the electrode 30 according to the image signal of the black image memory 38, and an image is formed using black toner. When this operation is repeated for 4 lines, that is, when the step motor 36 is driven by 4 pulses, 1 is added to the count value β and the value becomes 1, so it is determined that the value of β is not an even number. Ru.

Step S5: Information for the next line of the black image memory 38 is subtracted for one line, and this operation is repeated until the value of β becomes an even number again, that is, for four lines, leaving a blank area on the recording belt 5. is formed. Then, this operation is repeated and β
= 100, that is, recording type i where the leading edge of the black toner image on the recording belt 5 is the red toner development position.
When the number reaches 31, the process advances to step S6.

Step S6: Line information in the red image memory 39 is drawn for one line. This operation is repeated until the β becomes an odd number again,
Four lines are thinned out.

And when that β is larger than 100 and is not an even number,
That is, after β=101, the process moves to step S7.

Step S7: The electrode drive circuit 33 is activated, voltage is applied to the recording electrode 31 according to the image signal of the red image memory 39, and an image of red toner is formed on the recording belt 5. That is, an image using red toner is formed in a blank area formed when an image was previously formed using black toner. Thereafter, while β is an even number, the information is developed with black toner and the information is thinned out from the red image memory 39, and while β is an odd number, the black image information is developed with red toner and the black image information is thinned out. The action is repeated. Then, when the β reaches 600, that is, after the writing of the black image information is completed, steps S6 and S7 are repeated to continue only the development with the red toner, and the β reaches 701. In other words, after writing of the red image information is completed, step s is executed.
Move to 8.

Step S8: The step motor 36 is driven until the β becomes 900.

Step S9: The second step motor 36 is stopped, and the image is displayed on the display section of the main body.

As described above, the images on the two sides inputted from the host 34 are formed on the recording belt S every four lines, that is, every 1lI11. An example of the display is shown in FIG.

101 in FIG. 5(a) is black image information, and 102 is red image information. Once these image information is input,
An image like 103 in FIG. 5(b) is displayed.

Portions B and C of the image indicated by 102 in FIG. 5(a) are displayed in red in a stripe shape, and the other portions, that is, the image indicated by 101 are displayed in black. Fifth
An enlarged portion of the image indicated by 103 in FIG. 5(b) surrounded by a circle 104 is indicated by 105 in FIG. 5(c). As can be clearly seen from FIG. 5(c), black images and red images are alternately repeated in a stripe pattern.

Next, the erasing operation in the multicolor image display device described in FIGS. 1 and 2 will be explained with reference to FIG. 6.

FIG. 6 is one of the flowcharts.

Step SIO plunger 14 is turned on and erasing blade 7 is retracted from recording belt 5.

Step S11: The two-step motor 36 is driven to rotate the recording belt 5. When the count value β reaches 1700, the leading edge of the image recorded by the recording electrode 30 reaches the erasing position of the erasing blade 7. Then, when the β becomes 1701, the leading edge of the image recorded by the recording electrode 31, that is,
The leading edge of the portion developed with red toner reaches the position of the erasing blade 7.

Step 512: At this time, the plunger 14 is turned off and the erasing blade 7 is turned off.
is brought into contact with the recording belt 5 to start erasing. and,
Since the process continues until the value of β becomes an even number, the area developed with the red toner is erased. That is, the red toner is scraped off and collected into the toner container 10.

In this way, by erasing with the erasing blade 7 only while the count value β is an odd number, only the area developed in red is erased. The area that has not been erased, that is, the area that has been developed in black, is erased when it reaches the position of the erasing blade 6, and the black toner is transferred to the toner container 9.
will be collected within.

Step 513: When the count value β reaches 2401, the entire image is erased, so the step motor 36 is stopped at this time.

Step 514 D The erasure is completed by turning off the plunger 14.

In this way, since the red area is erased by the erasing blade 7 and the black area is erased by the erasing blade 6, toners of different colors are collected without mixing with each other.

FIG. 7 is another electrical block diagram of the device of FIG. 1.

In FIG. 7, 40.41 is a memory that stores signals x and y indicating an area to be displayed in a single color.

That is, as explained in FIG. 2, numeral 34 is a host which is a specifying means, and stores image information for one screen each when displaying in two colors, black and red. When the operator specifies an area to be displayed in a single color of black or red, signals x and y indicating the area to be displayed in a single color are sent to the control circuit 35 along with the image signal. Others are 2nd
This is the same as the case shown in the figure.

Next, an example of the operation of the multicolor image display device described in FIGS. 1 and 7 will be described with reference to FIGS. 8 to 13.

First, FIGS. 8 and 9 are diagrams that simply show the operations performed by the operator. For the image 51 displayed in black and red (shaded areas) on the CRT 50, select the area ( This shows how EFG)l in the figure is specified with the cursors 52 and 53.

In the flowchart of FIG. 12, step 521 has just been performed.

Step 521: An area to be displayed only in black is specified.

At this time, a value X l + X 2 corresponding to the count value of the counter 37 is calculated from the cursor position.

Step S22: As shown in FIG. 9, when an area to be displayed only in red is designated with the cursor 54, 55, a value 3'l, ``J2'' corresponding to the count value is similarly calculated.

Step S23: When the operator instructs to start, the black image signal, the red image signal, and the area signal X
+, 2,'j1. The value of 'j2 is sent from the host 34 to the control circuit 35.

FIGS. 10(a) and 10(b) show images developed in accordance with black and red image signals, respectively, and these signals are stored in memories 38 and 39, respectively.

Moreover, the above-mentioned X, +X2 are stored in the memory 40, and the above-mentioned y+
+y2 are respectively stored in the memory 41.

Step S24: The control circuit 35 resets the count value β of the counter 37 to O.

With this, the flow for standby ends.

Next, the flow of the display operation will be described, but to make the explanation easier to understand, development by the black developing section and development by the red developing section will be explained separately.

First, FIG. 13 shows a flowchart of the developing operation by the black developing section.

In step S25, the recording belt 5 starts rotating by starting to drive the two-step motor 36.

Step 526: The electrode drive circuit 32 is activated, a voltage is applied to the recording electrode 30 according to the image signal of the black image memory 38, and an image is formed with black toner. Then, when this operation is repeated for four lines, that is, when the step motor 36 is driven by four pulses, 1 is added to the count value β and becomes 1, so that β is determined to be an odd number.

Step S27; The next line information of the black image memory 38 is subtracted for one line, and this operation is repeated until the value of β becomes an even number again, that is, for four lines. As a result, a blank space is left on the recording belt 5. area is formed.

Then, when the β is an even number, the image is developed according to the information in the black image memory 38, and when the β is an odd number, the information in the memory 38 is thinned out.By repeating this operation, a striped image is formed. . Then, the β is the x1
When the value of β is reached, step 52B is executed regardless of whether the value of β is an odd number or an even number. This operation is performed until the β reaches x2, so that X.

, and x2, information from the black image memory 38 is continuously developed. That is, the image in the area indicated by the cursor is developed without thinning out.

Further, when the value of β reaches y, step S27 is executed regardless of whether the value of β is an odd number or an even number. And, since this operation is performed until the β reaches the above-mentioned y2,
Between y and y2, no development is performed on the recording belt 5, so a blank area is formed.

Then, the process returns to the initial operation again, and steps S26 and 527 are repeated depending on whether the value of β is an odd number or an even number, and an image is formed in a stripe shape. When β reaches 600, i.e. When the development for one surface of the display screen is completed, the operation of the electrode drive circuit 32 ends.

Next, a flowchart of the developing operation by the red developing section is shown in FIG. In reality, it is shown to proceed simultaneously with the above-mentioned concrete development section, and the same step as step S25 in FIG. 13 is performed first.

Step S25: Start driving the second step motor 36, rotate the recording belt 5, and when the counter value β of the counter 37 reaches 100, that is, when the leading edge position of the image on the recording belt 5 is at the recording electrode 3 of the red developing section. When the position is reached, the developing operation is started. If the β is an odd number, the process proceeds to step 528.

Step 528: The electrode drive circuit 33 is activated, voltage is applied to the recording electrode 31 according to the image signal of the red image memory 39, and an image is formed with red toner. Since this operation is performed only while the value of β is an odd number, an image with red toner is formed in the blank area formed when an image was previously formed with black toner.

If β is not an odd number, step S29 is executed.

Step S29: Information is only thinned out from the red image memory 39 and no development is performed. That is, the area on the recording belt 5 that has been developed with black toner is not developed with red toner.

And step 28. Step 29 is repeated according to the value of β, and the value of β is y1+100 to y2+1.
00, step 528 is executed regardless of whether the number is even or odd. That is, the image in the area designated by the cursor is developed without thinning out.

Further, while β is between x,+100 and x2+100, step 529 is executed and no development is performed.

That is, areas on the recording belt 5 that have already been developed with black toner are not developed with red toner.

Then, when the β reaches 700, the electrode drive circuit 33
operation ends.

When the development is completed in the manner described above, the step motor 36 is driven until the count value β reaches 900, and the developed image is displayed on the display section.

In this way, black and red images are developed alternately in stripes according to the information in the black image memory 38 and red image memory 39, while areas designated as black are continuously developed with only black. The red area is developed continuously with only red color.

FIG. 11 shows an example of the display screen displayed in this way, in which the images in FIGS. 10(a) and 10(b) are combined, and FIG. 11 ( b) As shown at 105, black and red images are developed alternately in stripes.

Also, the area specified by cursor 52 and 53 in Figure 8 (
It can be seen that the εFGI+ portion) is continuously developed in black, and there are no gaps in the image, making it easy to see. The same applies to the area designated by the cursors 54 and 55 in FIG. 9 (CO portion).

In this way, for fine text, specify the area and
- By developing in color, the image does not deteriorate;
Can be displayed.

Although the above embodiment has been described using two different toner colors, black and red, the present invention can also be applied to a case where three or more colors are used. Further, although a very simple display example has been given, it is also possible to specify a large number of areas to be developed. Furthermore, for erasing, a magnet or the like may be used instead of the erasing blade.

[Effects of the Invention] As explained above, according to the present invention, since images are formed using multicolored toners, the expressive power is rich, and various functions such as displaying parts to be emphasized by changing colors are possible. It is easy to use, and characters can be displayed in a single color without deteriorating the image quality. Furthermore, during cleaning, the toner h5 can be reused without being mixed with other colors.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional elevational view showing one embodiment of the present invention, Fig. 2 is an explanatory diagram showing the apparatus of Fig. 1 in an electrical block diagram, and Fig. 3 is a length of the recording belt of the same apparatus. FIG. 4 is an explanatory diagram showing the relationship between the display operation of the device and the count value of the counter, and FIG.
a), (b), and (c) are explanatory diagrams showing display examples of the same device, Fig. 6 is an explanatory diagram showing a flowchart of the erasing operation of the same device, and Fig. 7 is an explanatory diagram showing an example of the display of the same device. Another explanatory diagram shown in the figure, FIG. 8 is an explanatory diagram of an example of the operation of the same device, FIG. 9 is another explanatory diagram of an example of the operation of the same device, and FIGS. 10(a), (b) ) is another explanatory diagram showing an example of the display of the same device, and FIGS. 11(a) and (b
) is yet another explanatory diagram showing an example of the display of the same device,
FIG. 12 is another explanatory diagram showing the display operation of the same device in a flowchart, FIG. 13 is an explanatory diagram showing the developing operation by the black developing section of the same device in a flowchart, and FIG. 14 is an explanatory diagram of the same device. FIG. 2 is an explanatory diagram showing a developing operation by a red developing section in the form of a flowchart. 1... Toner (black) 2... Toner (red) 5...
・Recording belt 6,7... Erasing blade 9.10・
... Toner container 30.31 ... Recording electrode 34 ... Host 35 ... Control circuit 36 ...
Step motor 37... Counter 38... Black image memory 39.
...Red image memory Figure 1 Figure 3 Figure 50 ((L') (b) Figure 6 Figure 10 Figure 11

Claims (1)

[Claims] 1. Consisting of a recording belt as a recording medium, rows of electrodes arranged perpendicular to the rotating direction of the recording belt, and toner containers, each of which carries toner of a different color. The apparatus includes a plurality of developing sections, and storage means provided in the same number as the number of developing sections and storing image information corresponding to the developing sections for each side, and furthermore, information is stored from each of the storage means. Taking out a certain amount at regular intervals and sequentially developing a certain amount using the corresponding developing section,
A multicolor image display device characterized by comprising a control means for controlling this to be repeated a plurality of times. 2. It has a specifying means for specifying an image range and a color, and a memory for storing these signals, and for the specified range, image information corresponding to the specified color is continuously retrieved from the storage means corresponding to the specified color. In addition to being developed by the developing section,
2. The multicolor image display device according to claim 1, wherein control is performed to thin out a considerable amount of information from other storage means. 3 Erasing sections are provided in the same number as the developing sections in correspondence with the developing sections, and a position detecting means for detecting the rotational position of the recording belt, and each erasing section is set according to a signal from the position detecting means. Claim 1 wherein the parts are sequentially and selectively activated.
The multicolor image display device described above.