JPH08212002A - Electronic information board - Google Patents

Abstract

PURPOSE: To provide an electronic information board being sanitarily handled and capable of easily erasing a picture and easily displaying a preceding picture. CONSTITUTION: This electronic information board 10 is constituted of an XY coordinate input panel 11 consisting of a transparent material provided with plural amorphous magnetic wires extended in X and Y directions in parallel at a prescribed interval, a dot matrix type liquid crystral panel 12 for X and Y directions which is arranged on the back of the panel 11, a rear panel 13 arranged on the rear of the panel 12 and consisting of a light absorbing material, and a controller 14 for controlling the drive of the panel 13 based upon a coordinate signal outputted from the panel 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic information board in which handwritten characters and figures are taken in as image signals and displayed on a large screen.

[0002]

2. Description of the Related Art Conventionally, for example, in a conference room or the like, handwritten characters and figures are given to a plurality of attendees in the conference room.
When giving a presentation, the following means are adopted.

In the case of a blackboard, a presentation is given by handwriting characters and figures with chalk on the surface of the blackboard and letting attendees directly observe these characters and figures.

Further, in the case of an electronic blackboard, for example, when characters / figures, etc. are handwritten with water-based ink on the surface of a whiteboard in the form of a roll sheet, these characters / figures are directly observed by attendees, and Characters / graphics can be captured as an image signal by being electronically scanned by a line CCD scanner. Then, by printing this image signal on the paper by the printer,
A copy of the handwritten letters and figures on the electronic blackboard can be distributed to attendees.

Overhead projectors are also widely used for presentations. In this case, when characters / figures are handwritten with a water-based ink on a transparent film placed on the platen, these characters / figures are illuminated from below and projected on the screen, A presentation can be made by having attendees watch the video of.

In recent years, a liquid crystal projector has been known in which a CRT display signal in a personal computer is projected on a screen as in the case of an overhead projector.

[0007]

However, each of the above-mentioned presentation means has the following problems. In other words, blackboard has the advantage of low cost, but when erasing with a blackboard wipe, chalk powder scatters and stains hands, clothes, etc., and chalk powder also surrounds the blackboard. There was a problem in terms of hygiene, as it was scattered and soiled. Furthermore, maintenance work is required to remove chalk powder adhering to the blackboard wipe.

In the case of electronic blackboards, handwritten characters and figures can be easily copied, which is rapidly spreading. However, in the case of erasing, it is necessary to wipe the blackboard as well. However, in order to display previously handwritten characters / figures, it is necessary to rewind the white sheet in the form of a roll sheet, which is troublesome to operate.

In the case of the overhead projector and the liquid crystal projector, there is a problem that it is necessary to darken the surroundings, and when a person stands in front of the screen, the screen becomes a shadow and the display disappears.

In view of the above points, the present invention has an object to provide an electronic information board which is hygienic and which can be easily erased and displayed on the previous screen.

[0011]

According to the present invention, there is provided an XY coordinate input panel made of a transparent material having a plurality of amorphous magnetic wires extending in parallel in the X direction and the Y direction at predetermined intervals. A dot matrix type liquid crystal display panel in the XY directions arranged behind the XY coordinate input panel, a rear panel made of a light absorbing material arranged behind the liquid crystal display panel, and an XY coordinate input panel. And a control device for driving and controlling the liquid crystal display panel based on the coordinate signal of
Achieved by electronic information boards.

In the electronic information board according to the present invention, preferably, each coordinate input position of the XY coordinate input panel corresponds to each display dot of the liquid crystal display panel.

In the electronic information board according to the present invention, preferably, the control device is a personal computer.

In the electronic information board according to the present invention, the control device preferably includes a memory for storing the coordinate signal from the XY coordinate input panel.

In the electronic information board according to the present invention, preferably, the control device includes recording means for recording the coordinate signal from the XY coordinate input panel.

[0016]

According to the above construction, by applying a coordinate pointing pen for performing AC excitation to a predetermined position on the XY coordinate input panel, the corresponding X direction and Y are applied at that position.
The directional magnetic wire generates a pulse-like voltage as a vertical Matouchi voltage at both ends thereof by the so-called Matuchi effect. Then, by inputting this pulsed voltage to the control device, the specified XY coordinate is detected, and based on the coordinate signal relating to this XY coordinate, the XY coordinate specified by the coordinate signal of the liquid crystal display panel is detected. The display dot at the position is drive-controlled. In this case, since each coordinate input position of the XY coordinate input panel and each display dot of the liquid crystal display panel correspond to each other, the coordinate position designated by the coordinate pointing pen of the XY coordinate input panel is displayed. Can be

Therefore, in the case of erasing, the controller can clear the coordinate signal so that the erasing can be easily performed electrically, and chalk powder may fly like in the case of a blackboard. Not hygienic. Also, since the display by the liquid crystal display panel is not projection,
Even if a person stands in front of it, the display does not disappear.

When the control device is a personal computer, the electronic information board can be easily controlled by using a commercially available personal computer, and a dedicated control device is developed. Costs can be reduced because there is no need.

When the control device has a memory for storing the coordinate signal from the XY coordinate input panel, the coordinate position designated by the coordinate indicating pen can be fetched in the memory, so that the coordinate indicating pen can be used. When is moved, the coordinate position of the movement locus of the coordinate indicating pen is sequentially stored in the memory, so that the movement locus can be displayed on the liquid crystal display panel.

In the case where the above-mentioned control device is provided with a recording means for recording the coordinate signal from the XY coordinate input panel, the coordinate signal is read out from the recording means as necessary, and if necessary, At any time, based on the desired coordinate signal, desired characters, figures, etc. can be re-displayed on the liquid crystal display panel.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. 1 to 6 show an embodiment of an electronic information board according to the present invention. In FIG.
The electronic information board 10 includes an XY coordinate input panel 11, a liquid crystal display panel 12 arranged behind the XY coordinate input panel 11, a rear panel 13 arranged behind the liquid crystal display panel 12, Control device 1 for driving and controlling a liquid crystal display panel based on coordinate signals from an XY coordinate input panel
4 and.

The XY coordinate input panel 11 is, for example, PET.
A plurality of amorphous magnetic wires 11b extending in the x direction and a plurality of amorphous magnetic wires 11c extending in the y direction are provided on the surface of the transparent sheet 11a made of
Further, a protective cover 11d is provided on the front surface and the back surface. The magnetic wires 11b and 11c extend in parallel to each other at a predetermined interval, for example, an interval of about 3 to 10 mm, and one end thereof is connected to a circuit board (not shown) and the other end thereof is connected. However, they are commonly connected.

The liquid crystal display panel 12 is constructed as a so-called dot matrix type liquid crystal display panel in which display dots are arranged in the X and Y directions. In this case, each display dot has a size of 0.5 to several mm square, for example, and has a large display screen as a whole. And each dot of the liquid crystal display panel 12 is
As shown in FIG. 3, for each magnetic wire 11b and 11c of the Y-coordinate input panel 11, the adjacent magnetic wires 11b
Between b and 11c, at least one (three in the illustrated case) display dot is arranged. As a result, each display dot on the liquid crystal display panel 12 corresponds to each XY coordinate position on the XY coordinate input panel 11.

The display dots of the liquid crystal display panel 12 can be driven by the drive control circuit of the control device 14, respectively. As a result, as shown in FIG. 4, each display dot has a relatively low light transmittance when the driving voltage is low and a high light transmittance when the driving voltage is high.
The light transmittance is relatively high. Therefore, each light emitting dot is turned on and off by the drive voltage.
It can be controlled to be transparent or non-transparent.

The rear panel 13 is made of a light absorbing material,
Alternatively, a light absorbing film is provided on the front surface. As a result, when the display dots of the liquid crystal display panel are in the transmissive state, the light transmitted through the display dots is absorbed by the surface of the rear panel 13.

In the case shown in FIG. 1, the control device 14 includes a personal computer 14a and an XY position control circuit 14.
b, a liquid crystal display panel control circuit 14c. The XY position control circuit 14b uses the above-mentioned XY coordinate input panel 11 to move the magnetic wire 1 by the coordinate pointing pen 11e.
By inputting the voltages 1b and 11c, the designated coordinate position is detected, and the personal computer 14a is detected.
The coordinate signal is output to.

Further, the liquid crystal display panel control circuit 14c is
Based on the coordinate signal from the personal computer 14a, the display dot at the designated coordinate position of the liquid crystal display panel 12 is driven to switch to the non-transmissive state.

In the illustrated embodiment, a transparent protective film 15 is provided on the front surface of the XY coordinate input panel 11.

Electronic information board 10 according to an embodiment of the present invention
Is configured as described above, and as shown in FIG.
By applying a coordinate indicating pen 11e that performs AC excitation of, for example, several hundreds of kHz from above the transparent protective film 15 to a predetermined position of the XY coordinate input panel 12, the corresponding X direction and Y direction can be detected at that position. Magnetic wire 1
1b and 11c generate a pulse-like voltage as a vertical Matouchi voltage by the so-called Matuchi effect at both ends thereof. This pulsed voltage is passed through the circuit board,
It is input to the XY position control circuit 14b of the control device 14.
As a result, the XY position control circuit 14b causes the designated X
The Y coordinate is detected and a coordinate signal relating to this XY coordinate is output to the personal computer 14a.

Then, the personal computer 14a
Captures this coordinate signal in a memory in the main body and stores it in an auxiliary storage device such as a floppy disk, a hard disk, or a magneto-optical disk, if necessary.

Further, the personal computer 14a
Outputs this coordinate signal to the liquid crystal display panel control circuit 14c. Thereby, the liquid crystal display panel control circuit 14c
Applies a relatively low drive voltage to the display dot 12a at the XY coordinate position designated by the coordinate signal, and applies a relatively high drive voltage to the other display dots. Therefore, as shown in FIG.
Only the non-transmissive state reflects the incident light from the front surface. The other display dots are in a transmissive state, and the incident light is transmitted through the display dots and absorbed by the surface of the rear panel 13. Thus, only the coordinate position designated by the coordinate indicating pen 11e is displayed in white, and the other parts are displayed in black.

Here, when the coordinate indicating pen 11e moves, the coordinate position of this movement locus is sequentially fetched into the memory of the personal computer 14a, so that
Characters, figures and the like due to the movement of the coordinate indicating pen 11e can be displayed in white on the liquid crystal display panel 12.

Further, by clearing the coordinate signal taken into the memory of the personal computer 14a, the display on the liquid crystal display panel 12 can be erased, and the coordinate signal stored in the auxiliary storage device of the personal computer 14a can be erased. By reading out on a memory and driving and controlling the liquid crystal display panel 12 based on this coordinate signal, the previously displayed display content can be easily redisplayed at any time.

FIG. 6 shows a second embodiment of the electronic information board according to the present invention. In this case, electronic information board 2
0 is an XY coordinate input panel 11, a liquid crystal display panel 12,
The rear panel 13 and the transparent protective film 15 are configured as an integrated board portion 21, and a dedicated integrated control is used instead of the control device 14 including the personal computer 14a, the XY position control circuit 14b and the liquid crystal display panel 14c. Device 22 is being used. Other configurations are similar to those of the electronic information board 10 shown in FIGS. 1 to 5.

According to the electronic information board 20 having such a configuration, by moving the coordinate indicating pen 11e to a predetermined position on the surface of the board portion 21, the coordinate position related to the position is changed to the control device 22. Is detected by the control device 22, and the control device 22 drives and controls the display dot at the corresponding coordinate position on the liquid crystal display panel of the board portion 21 to perform display.

Even in this configuration, the floppy disk drive 22a provided in the control device 22 allows
The coordinate signal is stored in the floppy disk, and when necessary, the coordinate signal is read from the floppy disk so that the re-display can be performed at any time.

FIG. 7 shows another embodiment of the electronic information board according to the present invention. That is, in FIG. 7, the electronic information board 30 includes a board unit 31 and an XY position control circuit 32 to which a signal from the coordinate input panel of the board unit 31 is input.
A liquid crystal display panel control circuit 33 for driving and controlling the liquid crystal display panel of the board section 31, and a host for inputting coordinate signals from the XY position control circuit 32 and driving and controlling the liquid crystal display panel control circuit 33. Personal computer 34, and the personal computer 34
LAN connected to multiple (two in the case shown)
Personal computers 35 and 3 as terminals
6, and a tablet device 35a for inputting XY coordinates, which is connected to the personal computers 35 and 36, respectively.
36a.

In this case, the board section 31 is constructed similarly to the board section 21 shown in FIG. 6, and in addition to the large-sized liquid crystal display panel 31a, a plurality of boards are provided on the right side (in the case of the figure, 3
The individual small liquid crystal display panels 31b, 31c, 31d are provided. Here, each small liquid crystal display panel 31b, 31
c, 31d are personal computers 34, respectively.
It is related to 35 and 36.

The electronic information board 30 thus configured
The large liquid crystal display panel 31a of the board unit 31
By moving a coordinate pointing pen to a predetermined position on the surface of the XY coordinate input panel on the front side of the XY coordinate input panel, the coordinate position relating to the position is detected by the XY position control circuit 32, and the coordinate signal is sent to the personal computer 34. Is entered. As a result, the personal computer 34
Outputs this coordinate signal to the liquid crystal display panel control circuit 33, and drives and controls the display dots at the corresponding coordinate positions of the large liquid crystal display panel 31a and the small liquid crystal display panel 31b of the board section 31, thereby performing the liquid crystal display. Panel 31
Display is performed on a and 31b.

Further, the personal computers 35 and 36
When coordinate input is performed by the tablet device 35a or 36a connected to the personal computer, the coordinate signal is similarly transmitted from the personal computers 35 and 36 to the personal computer 34 through the LAN line. As a result, the personal computer 34 outputs these coordinate signals to the liquid crystal display panel control circuit 33 so that the small liquid crystal display panels 31c and 31d respectively display the coordinate signals.

Further, the personal computer 34 is
If necessary, the display screens of the small liquid crystal display panels 31c and 31d can be appropriately displayed on the large liquid crystal display panel 31a based on the coordinate signals stored in the memory. Switching, erasing, redisplaying, etc. of these display screens can be easily performed by applying a coordinate pointing pen to the icon displayed at the right end of the large-sized liquid crystal display panel 31a.

In each of the above embodiments, each display dot of the liquid crystal display panel is configured to switch from the non-transmissive state to the transmissive state when a drive voltage is applied. However, the display dot may be configured to be switched from the transmissive state to the non-transmissive state when a driving voltage is applied. In this case, each display dot is always applied with the driving voltage and the coordinate indication is performed. Only for the display dot corresponding to the coordinate position specified by the pen,
The driving voltage is turned off. This allows
Similarly, white is displayed on a black background.

[0043]

As described above, according to the present invention, X
By applying a coordinate pointing pen that performs AC excitation to a predetermined position on the Y coordinate input panel, the corresponding X-direction and Y-direction magnetic wires are perpendicular to each other at the position by the so-called Matheus effect. A pulsed voltage as a Matheus voltage is generated. Then, by inputting this pulsed voltage to the control device, the specified XY coordinate is detected, and based on the coordinate signal relating to this XY coordinate, the XY coordinate specified by the coordinate signal of the liquid crystal display panel is detected. The display dot at the position is drive-controlled. In this case, each coordinate input position of the XY coordinate input panel,
Since the respective display dots of the liquid crystal display panel correspond to each other, the display of the coordinate position designated by the coordinate indicating pen of the XY coordinate input panel can be performed.

Therefore, in the case of erasing, it is possible to easily electrically erase the coordinate signal by the controller to clear the coordinate signal, and the chalk powder may fly like the case of the blackboard. Not hygienic. Also, since the display by the liquid crystal display panel is not projection,
Even if a person stands in front of it, the display does not disappear.

Thus, according to the present invention, it is possible to provide an extremely excellent electronic information board which is sanitary and can be easily erased and displayed on the previous screen.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of an electronic information board according to the present invention.

FIG. 2 is a schematic plan view showing a configuration of an XY coordinate input panel in the electronic information board of FIG.

3 is a partially enlarged view showing a positional relationship between magnetic wires of an XY coordinate input panel and display dots of a liquid crystal display panel in the electronic information board of FIG.

FIG. 4 is a graph showing the relationship between the drive voltage of display dots and the light transmittance of the liquid crystal display panel in the electronic information board of FIG.

5 is a partially enlarged cross-sectional view of the electronic information board of FIG.

FIG. 6 is a block diagram showing a second embodiment of the electronic information board according to the present invention.

FIG. 7 is a block diagram showing a third embodiment of the electronic information board according to the present invention.

[Explanation of symbols]

10, 20, 30 Electronic information board 11 XY coordinate input panel 11b X direction magnetic wire 11c Y direction magnetic wire 11e Coordinate pointing pen 12 Liquid crystal display panel 13 Rear panel 14,22 Control device 14a Personal computer 14b XY position control circuit 14c , 33 Liquid crystal display panel control circuit 15 Transparent protective film 21, 31 Board part 22a Floppy disk drive 31a Large liquid crystal display panel 31b, 31c, 31d Small liquid crystal display panel 32 XY position control circuit 34 Personal computer (host) 35, 36 Personal computer (Terminal) 35a, 36a Tablet device

Claims (5)

[Claims] 1. An XY coordinate input panel made of a transparent material having a plurality of amorphous magnetic wires extending in parallel in the X and Y directions at predetermined intervals, and an XY disposed behind the XY coordinate input panel. Direction dot matrix type liquid crystal display panel, a rear panel made of a light absorbing material disposed behind the liquid crystal display panel, and control for driving the liquid crystal display panel based on coordinate signals from the XY coordinate input panel. An electronic information board, comprising an apparatus and a device. 2. The electronic information board according to claim 1, wherein each coordinate input position of the XY coordinate input panel corresponds to each display dot of the liquid crystal display panel. 3. The electronic information board according to claim 1, wherein the control device is a personal computer. 4. The electronic information board according to claim 1, wherein the control device includes a memory for storing coordinate signals from the XY coordinate input panel. 5. The electronic information board according to claim 1, wherein the control device includes recording means for recording the coordinate signal from the XY coordinate input panel.