JPH01297670A - Multicolor image display device - Google Patents

Abstract

PURPOSE:To attain affluent expression by determining the development timing based on a signal from a position detecting means detecting the turning position of a recording belt, developing an image and erasing an image after erasing parts are selectively operated based on a signal from a memory. CONSTITUTION:The title device is provided with plural developing parts 9 and 10 carrying different types of toner, plural erasing parts 6 and 7 corresponding to these parts 9 and 10, and the position detecting means detecting the turning position of the recording belt 5. To develop an image, the developing part is selected according to a selected area and color, and the development timing is determined based on the signal from the position detecting means, thereby developing an image. Moreover, the memory 38 storing the relation between areas on the recording belt 5 and developing colors is provided. To erase an image, the erasing parts 6 and 7 are selectively operated based on the signal in the memory 38 to erase an image. An image is displayed with plural areas in different colors. As a result, expression becomes enriched. In addition, toner can be recovered without mixing with the other one at the time of cleaning the device, whereby it can be reused.

Description

[Detailed description of the invention] [Field of application in a business] The present invention relates to a multicolor image display device, and in particular,
The present invention relates to a multicolor image display device in which toners of different colors are deposited on a belt-shaped recording medium to form an image, and the resulting image is observed.

[Prior Art] Conventional image display devices form images by attaching toner to the surface of the belt while rotating a belt, which is a recording medium, and are suitable for large screen display, such as A1 size and A
O size can be provided relatively easily and inexpensively. This device can be used for meetings, for example, by reading an A4 size document with a scanner and enlarging it to A1 size using electrical processing.
Alternatively, it can be used for internal bulletin boards, advertisements, etc.

[Problems to be Solved by the Invention] However, in the conventional image display device described above,
Since it is a still image display and a monochromatic display, there is a problem that it lacks expressive power and cannot be used in a way that emphasizes parts or attracts the attention of the viewer.

The present invention aims to solve the above problems. That is, an object of the present invention is to provide a multicolor image display device that can obtain rich expressive power by forming images using multicolor toners.

[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 as a recording medium, and a row-like display arranged in a direction perpendicular to the rotating direction of the recording belt. a plurality of developing sections each consisting of an electrode and a toner container, a plurality of erasing sections corresponding to each of the developing sections, and a position detecting means for detecting a rotational position of the recording belt; The developing section carries toners of different colors and has designation means for designating a display area and display color, and a memory for storing signals from the designation means.

[Function] According to the present invention, since there are a plurality of developing sections carrying toners of different colors and a plurality of erasing sections corresponding thereto,
During development, a developing section is selected according to the selected area and color, the development timing is determined based on the signal from the position detection means that detects the rotational position of the recording belt, and development is performed. Since it has a memory that stores the relationship between the area on the recording belt and the developed color, when erasing, the erasing unit is selectively operated based on the signal of the memory to erase.
Each area can be displayed in multiple colors.

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

In FIG. 1, 1 is a black conductive magnetic toner;
It is carried over the surface of the cylinder 3 by being drawn by the rotating magnet of the non-magnetic cylinder 3, and guided onto the recording electrode 30 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 by rollers 11 and 12 in the direction of the arrow, and as the belt 5 rotates, a linear recording electrode repeats the operation of depositing toner, thereby forming a two-dimensional image. Formation takes place.

A fixed erasing blade 6 scrapes off the toner adhering to the recording belt 5 into the toner container 9. Reference numeral 7 designates a movable erasing blade, which is rotatable around a fulcrum 8 and connected to the plunger 14. When the plunger 14 is off, it is in the (a) position, and when the plunger 14 is on, it is in the (b) position. in position. When the blade 7 is in the position (A), it contacts the recording belt 5 and scrapes off the toner on the surface into the toner container 10, and in the position (0), it is away from the recording belt 5 and is attached to the toner. The toner that has been removed is allowed to pass through.

Reference numeral 15 denotes a toner conveying belt, which is hung around 16 and 17 and conveys the toner to the cylinder 4 side by rotation. 13 is a main body case, and a display section is provided on the front surface of the main body case.

FIG. 2 is an electrical block diagram of the device of FIG. 1.

In FIG. 2, 32 and 33 are the recording electrodes 30.
This is an electrode drive circuit that applies voltage to predetermined terminals of 31. 34 is a host which is a specifying means, and CRT
It comes with a display, keyboard, etc., and image information read in with a scanner etc. can be recorded once. Then, the operator specifies the area to be output in red,
When the start button is pressed, along with the red area signal,
The image signal is sent to the control circuit 35. 38 is a memory that stores the red area signal. 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, etc., and by driving one pulse of the step motor, the recording electrode The setting is such that one line recording is performed by the following. 37 is a counter, which adds one count each time the step motor 36 is driven with a constant pulse.

FIG. 3 is a diagram showing the relationship between the length of the recording belt 5 and the count value of the counter 37.

That is, when the position of the recording electrode 30 is set to 0, it shows the value counted until the position on the recording belt 5 reaches each point. In other words, there are 5
0 count, 150 at the bottom of the display. The upper end is reached at 450 counts, and the erase position of the erase blade 7 is reached at 850 counts. Also, one round is 1000 counts.

The operation of displaying a multicolor image in the multicolor image display device of FIG. 1 configured as described above will be explained with reference to FIGS. 4 and 5.

FIG. 4 is a diagram that simply represents the operation, and FIG. 4(a) shows that the image 41 displayed on the CRT 40 is
This shows a state in which the area to be displayed in red (portion B in the figure) is pointed with the cursor.

The flowchart in FIG. 5 shows a state in which step S1 has been performed.

Step S1: An area to be displayed in red is specified. At this time, a value corresponding to the count value of the counter 37 from the cursor position (
Xl, X2) are calculated. For example, in the case of FIG. 4(a), (100, 200) is calculated.

Step S2: When the operator instructs to start, the host 34 sends the count value (XI, X2) and the image signal to the control circuit 35.

Step S2゛; The values of xl and x2 are stored in the memory 38.

Step S3: The control circuit 35 resets the count value β of the counter 37 to zero.

Step S4: Drive the second step motor 36 to rotate the recording belt 5.

Step S5: The electrode drive circuit 32 is activated, a voltage is applied to the recording electrode 30, and development with black toner is performed. and,
When the count value β reaches the value xl, the process moves to step S6.

Step S6: When the electrode drive circuit 32 is stopped and the position of the recording electrode 30 on the recording belt 5 reaches the position of the recording electrode 31 when the value of β is x and +50, that is, the count value X, step The process moves to S7.

Step 7: The electrode drive circuit 33 is activated, voltage is applied to the recording electrode 31, and development with red toner is performed. And β
When sx x2 is reached, the process moves to step 8.

Step 8: The electrode drive circuit 32 is activated again and development with black toner is performed. Then, when β exceeds 300, the process moves to step S9.

Step S9: When the electrode drive circuit 32 stops and β becomes a small amount of X2''50, the process moves to step SIO.

Step S10: When the electrode drive circuit 32 stops and β reaches a value of 450, that is, when the leading edge of the image reaches the upper end of the display section,
The process moves to step 311.

Step S11d Step motor 36 stops.

In this way, for the area on the recording belt S corresponding to the area designated as red, the electrode drive circuit 32 for attaching black toner is not activated, and the area corresponding to the area designated as red is adjusted by the distance between the electrodes 30 and 31. After the delay, the image is developed with red toner by activating the electrode drive circuit 33.

In addition, since the image signal to be recorded in red requires a time delay, if the signal sent from the host 34 is a continuous signal like a trickle, a memory is provided in the device to record the image signal in red. Only the image signal to be stored needs to be stored once.

Through the series of operations described above, the image specified by the cursor as shown in FIG. 4(a) changes to the image specified by the cursor as shown in FIG. 4(b).
The image indicated by 42 is displayed in red, and the other parts are displayed in black.

Next, erasing will be explained with reference to the flowchart of FIG.

Step S21: Turn on the plunger 14 and retract the erasing blade 7.

Step S22; The step motor 36 is driven to rotate the recording belt 5. As a result, the toner attached to the recording belt 5 is
The toner is dropped by the erasing blade 6 and collected into the toner container 9. Then, when the count value β reaches X%+850, that is, when the beginning of the area developed with the red toner reaches the erasing position of the erasing blade 7, the step 52
Move to 3.

Step S23: Turn off the plunger 14, bring the erasing blade 7 into contact with the recording belt 5, and start erasing using the blade 7.

That is, the area developed with red toner is
, and the red toner is collected into the toner container 10 . Then, when the count value β reaches x2÷850, that is, when the rear end of the portion developed with the red toner reaches the erasing position of the erasing blade 7, step 3
Move to 24.

Step S24: The plunger 14 is turned on, and the blade 7 is retracted. Then, when the count value β reaches 1200, that is, when the position corresponding to the rear end of all the recorded images has completed one rotation, that is, when all the developed areas have passed the position of the erasing blade 6. , the process moves to step S25.

Step S25: The second step motor 36 stops, and the process moves to step 32B.

Step 326: Plunger 14 is turned off and erasing is completed.

In this way, when erasing, based on the value of X I * The blade 6 is controlled to erase.

As explained above, an image is developed with red toner corresponding to the designated red area to realize multicolor display, and when erasing, the image is developed using red toner based on the stored red area data. By selectively operating two erasing means to perform erasing, toner can be collected by color and reused.

In the above embodiment, a blade is used for erasing, but a magnet may also be used for erasing. Further, although the description has been made in the form of specifying only one red area, it is also possible to specify a plurality of red areas. Further, although it is not necessary to use two colors, red and black, a developing section and an erasing section are required for each color.

[Effects of the Invention] As explained above, the present invention includes a plurality of developing sections carrying different toners, a plurality of erasing sections corresponding thereto, and a position detection means for detecting the rotational position of the recording belt. established,
During development, a developing section is selected according to the selected area and color, the development timing is determined based on the signal from the position detection means, and development is performed. A memory is provided to store the relationship between the two areas, and when erasing, an erasing section is selectively operated based on the signal of the memory to erase, thereby making it possible to display each area in a plurality of colors. Therefore, according to the present invention, since an image is formed using multicolored toner, it is rich in expressiveness, and can be used in various ways, such as displaying areas that need to be emphasized in different colors. Since the toner is collected without being mixed with other colors, the toner can be reused.

[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 as an electrical block diagram, and FIG.
The figure is an explanatory diagram showing the relationship between the length of the recording belt in Figure 1 and the count value of the counter in Figure 2, Figure 4(a),
(b) is an explanatory diagram showing an example of display by the device in FIG. 1, FIG. 5 is an explanatory diagram showing a display operation of the device in FIG. 1 as a flowchart, and FIG. 6 is a flowchart showing the same erasing operation. It is an explanatory diagram. 1... Toner 2... Toner (red) 5
...Recording belt 6.7...Erasing blade 9
, lO... Toner container 15... Toner transport belt 30. 31... Recording electrode 34 River host 35.
...Control circuit 36...Step motor 37
...Counter 38...Memory Fig. 2 Fig. 3 Fig. 31: Recording ij electrode (b) Fig. 5

Claims (1)

[Scope of Claims] 1. A recording belt as a recording medium, a plurality of developing units each including a row of electrodes arranged perpendicular to the rotating direction of the recording belt, and a toner container; It has a plurality of erasing sections corresponding to each one and a position detecting means for detecting the rotational position of the recording belt, and the plurality of developing sections carry toner of different colors, and a display area and a display are provided. 1. A multicolor image display device comprising: a designating means for designating a color; and a memory for storing a signal of the designating means. 2. While rotating the recording belt, selectively operate the developing section in response to a signal from a specifying means for specifying the display area and display color and a signal from a position detecting means for detecting the rotational position of the recording belt. 2. The multicolor image display device according to claim 1, wherein an image is formed in a plurality of colors and is displayed. 3. According to the information in the memory that stores the signal of the designation means and the signal of the position detection means that detects the rotational position of the recording belt,
The multicolor image display device according to claim 1, wherein the erasing section is selectively activated. 4. Claim 1, 2 or 3, wherein toner transport paths are provided from the plurality of erasing sections to the respective developing sections.
The multicolor image display device described in .