JP2017004148A - Coordinate detection device and electronic information board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To specify operation processing by indicating an operation symbol arranged in a position where a display surface is not hidden.SOLUTION: A coordinate detection device includes an image display panel including an image display surface 22 and a bezel part 25 located outside the image display surface 22, an operation sheet 120 arranged in the bezel part 25 and displaying operation symbols 131 to 135 for specifying an operation processing item, at least two light-receiving sensors 300 and 310 imaging the image display surface 22 and the operation sheet 120, receiving light from a pen type input device 100 being in contact with the image display surface 22 or the operation sheet 120, and outputting a detection signal, and a light-receiving control circuit 350 detecting the coordinate of the pen type input device 100 in the image display surface or the operation sheet 120 on the basis of the detection signal from the light-receiving sensors 300 and 310.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a coordinate detection device and an electronic information board.

  In recent years, an image display device such as a liquid crystal panel, a coordinate detection device that detects coordinates on a display surface designated by a user using an indicator such as a pen-type input device, and writing based on coordinate data from the coordinate detection device An electronic information board called an interactive white board (Interactive White Board: IWB) having a control device for displaying various images is widely used. In such an electronic information board, an operation symbol area displaying an operation symbol for designating a specific electronic information board operation command is displayed on the display surface, and the operation symbol in the operation symbol area is designated by the indicator. It is detected by the coordinate detection device, and the operation specified by the operation symbol is performed on the electronic information board.

  In Patent Document 1, an operation sheet device (operation symbol display member) that can be pasted on a whiteboard that also serves as a projector screen that projects a desktop image of a personal computer is arranged, and operation buttons are displayed on the surface of the operation sheet device. The PC stores the operation sheet device button attribute table including information on the operation buttons (operation symbols) assigned to the operation sheet device. A device that detects an operation button clicked by a reading device and executes a corresponding command is described.

However, in the conventional electronic information board, an area for displaying an operation symbol is displayed so as to overlap a part of a display surface for presenting image information. For this reason, the image information to be presented is hidden. In order to cope with this and not hide the image information in the operation symbol area, it is necessary to perform an operation of selecting display / non-display of the operation symbol area.
Further, in the device described in Patent Document 1, when the operation sheet device is arranged outside the projection area on the whiteboard, the projection area of the whiteboard is reduced, while the operation sheet device is arranged inside the projection area on the whiteboard. Then, there is a problem that the image information displayed in the projection area of the whiteboard is covered.

  The present invention has been made in view of the above problems, and an object thereof is to designate an operation process by designating an operation symbol arranged at a position where the display surface is not hidden.

  In order to solve the above problems, the invention according to claim 1 is directed to an image display panel having an image display surface, a bezel portion located outside the image display surface, and an operation processing item that is disposed on the bezel portion. The operation symbol display member displaying the operation symbol for performing the imaging, the image display surface, and the light from the light emission indicator that touches the image display surface or the operation symbol display member by imaging the operation symbol display member Coordinate detection for detecting the coordinates of the light emission indicator on the image display surface or the operation symbol display member based on the detection signal from the imaging means and at least two imaging means for receiving a detection signal and receiving the detection signal Means.

  According to the present invention, it is possible to designate an operation process by instructing an operation symbol arranged at a position where the display surface is not hidden.

It is a perspective view which shows the external appearance of the electronic information board which concerns on 1st Embodiment of this invention. It is a block diagram which shows the hardware constitutions of the electronic information board which concerns on 1st Embodiment of this invention. It is a figure which shows typically the structure of the electronic information board which concerns on 1st Embodiment of this invention. It is a block diagram which shows the control system of the electronic information board which concerns on 1st Embodiment of this invention. It is a block diagram which shows the structure of the controller in the electronic information board which concerns on 1st Embodiment of this invention. It is a figure which shows the principle of position detection of the pen-type input device in the coordinate detection apparatus which concerns on 1st Embodiment of this invention. It is a graph which shows the output of the detection signal by the light receiving sensor in the coordinate detection apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the position detection state of the pen-type input device in the coordinate detection apparatus which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the example of the operation symbol display member in the electronic information board which concerns on 2nd Embodiment of this invention.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
The present invention has the following configuration in order to designate an operation process by designating an operation symbol arranged at a position where the display surface is not hidden.
That is, the coordinate detection device of the present invention includes an image display surface, an image display panel including a bezel portion positioned outside the image display surface, and an operation symbol arranged on the bezel portion for designating an operation processing item. The operation symbol display member displaying the image, the image display surface, and the operation symbol display member are imaged, and a detection signal is received by receiving light from the light emission indicator that is in contact with the image display surface or the operation symbol display member. And at least two image pickup means for outputting, and a coordinate detection means for detecting the coordinates of the light emission indicator on the image display surface or the operation symbol display member based on a detection signal from the image pickup means. It is characterized by that.
With the above configuration, it is possible to designate an operation process by instructing an operation symbol arranged at a position where the display surface is not hidden.
Hereinafter, the features of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
A coordinate detection device and an electronic information board according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an external appearance of an electronic information board according to an embodiment of the present invention.
As shown in FIG. 1, an electronic information board 10 according to an embodiment of the present invention includes a display 20 that is an image display device, a stand 40 that holds the display 20 in an upright state, and a device that drives the display 20. And a device storage section 50 for storage.
The display 20 is a liquid crystal panel, a plasma panel, or the like and forms a panel member. An image display surface 22 for displaying an image is formed on the front surface of the housing of the display 20, and a touch panel 24 that is a coordinate detection device is disposed on the image display surface 22.
The display 20 is an image display panel including an image display surface 22 and a bezel portion 25 located outside the image display surface 22.
In the embodiment, an operation sheet 120 that is an operation symbol display member that displays an operation symbol for designating an operation processing item is disposed on the bezel portion 25 located outside the image display surface 22 of the display 20. ing. The operation sheet 120 includes an operation symbol display unit 130 on which various operation symbols 131, 132, 133, 134, and 135 are displayed.

Furthermore, the electronic information board 10 can write characters, figures, and the like on the image display surface 22 with the pen-type input device 100 that is a dedicated light emission indicator. The pen-type input device 100 includes contact detection means on the pen tip 100A, detects that the pen tip 100A has touched the image display surface 22, and transmits a writing detection signal as a wireless signal.
The display 20 is provided with two light receiving sensors 300 and 310 that are light receiving means constituting the touch panel 24. The two light receiving sensors 300 and 310 detect the light of the pen-type input device 100 and detect the coordinates of the pen-type input device 100 based on the principle of triangulation.
The handwriting detection signal transmitted from the pen-type input device 100 is received. Based on these pieces of information, characters, figures, and the like written at the coordinate positions detected by the touch panel 24 are displayed.
The light receiving sensors 300 and 310 are disposed at the two upper corners of the image display surface 22 and have an imaging field angle of 90 degrees or more.
The light receiving sensors 300 and 310 capture the image display surface 22 and the operation symbol display unit 130 and receive light from the pen-type input device 100 that is in contact with the image display surface 22 or the operation symbol display unit 130. A detection signal is output to each.

The pen bottom 100B of the pen-type input device 100 is also provided with contact detection means, and when the pen bottom 100B contacts the image display surface 22, an erasure detection signal is transmitted as a radio signal. When the display 20 receives the erasure detection signal transmitted from the pen-type input device 100, the display 20 erases characters, graphics, and the like written at the coordinate position detected by the touch panel 24 from the image display surface 22.
In addition, as the display process by the erasing operation, a display process is performed in which the detected coordinate position is the same color as the background (for example, white) in the controller 60 which is a display control device.

  Furthermore, the pen-type input device 100 includes a pressure sensor that detects the contact force to the image display surface 22, and can change the intensity of light based on the detection value of the pressure sensor. The controller 60 changes the thickness of the writing line on the image display surface 22 based on the intensity of the light.

  The device storage unit 50 stores various devices such as a controller, a printer, and a video disk device described later. A keyboard 30 for performing an input operation is mounted on the upper surface of the device storage unit 50.

FIG. 2 is a block diagram showing the hardware configuration of the electronic information board.
As shown in FIG. 2, the electronic information board 10 includes a display 20, a touch panel 24, a keyboard 30, a CPU (Central Processing Unit) 501, a ROM (Read Only Memory) 502, a RAM (Random Access Memory) 503, An HDD (Hard Disc Drive) 504, an HDC (Hard Disk Controller) 505, a media drive 507, an interface (I / F) 508, a mouse 509, a microphone 510, a speaker 511, and a GPU (Graphics Processing Unit) 512 are connected via an expansion bus line 520. Connected and configured.

  The CPU 501 controls the overall operation of the electronic information board 10. The R0M 502 stores a program used for driving the CPU 501 such as IPL. The ROM 503 is used as a work area for the CPU 501. The HDD 504 stores various data such as programs. The HDC 505 controls reading or writing of various data with respect to the HDD 504 according to the control of the CPU 501. The media drive 507 controls reading or writing (storage) of data with respect to a recording medium 506 such as a flash memory. The I / F 508 performs connection of a dongle used for data transmission and prevention of unauthorized use of software via a communication network. The GPU 512 is connected to a ROM 513 storing a program used for driving the GPU 512 and a RAM 514 used as a work area of the GPU 512. The expansion bus line 520 includes an address bus, a data bus, and the like for electrically connecting the above components.

FIG. 3 is a diagram schematically showing the configuration of the electronic information board, and FIG. 4 is a block diagram showing a control system of the electronic information board.
The display 20 is controlled by the controller 60, and displays images captured from various screen operation units 26 and user PCs (Personal Computers) 90 that are input and operated on the image display surface 22.
The controller 60 includes a USB socket 72 to which a USB (Universal Serial Bus) cable 70 is connected and an input socket 82 to which a VGA (Video Graphics Array) cable 80 is connected. In the example shown in FIGS. 3 and 4, the input socket 82 corresponds to the VGA cable, but the input socket 82 is compatible with other standards such as HDMI (registered trademark) (High-Definition Multimedia Interface), DisplayPort, and the like. The input cable can be connected.

The user PC 90 has a storage 94 composed of a magnetic disk device or the like. The storage 94 stores programs such as various contents and content display application software. Then, the operator selects the desired content from the content stored in the storage 94 to display the content on the monitor 92.
Therefore, when the image data displayed on the monitor 92 of the user PC 90 is transferred via the USB cable 70 and the VGA cable 80, the controller 60 displays the image data displayed on the user PC screen 28 of the display 20 on the monitor 92. The same image as is displayed.

  The controller 60 is also connected to a network 204 such as the Internet or a LAN (Local Area Network) via a communication line 201 such as an optical fiber and a network socket 202.

FIG. 5 is a block diagram showing the configuration of the controller of the electronic information board.
The controller 60 of the electronic information board 10 includes a pen signal receiving unit 210, a controller operation system unit 220, an application unit 230, a video input device unit 240, and a touch panel driver unit 250. The application unit 230 includes an event signal determination unit 231, a video input processing unit 232, an image drawing processing unit 234, a screen deletion processing unit 236, and a screen operation processing unit 238.
The controller operation system unit 220 is a main control unit that manages and executes control processing performed by the controller 60. The application unit 230 performs a control process for generating the entire image displayed on the image display surface 22 of the display 20 and a control process for displaying on the user PC screen 28. In addition, the controller operation system unit 220 detects a writing detection signal when the pen tip 100A or the pen bottom 100B of the pen-type input device 100 is in contact with the image display surface 22, and detects a non-light emitting body such as a finger. If it is, a control process for displaying a written figure or character is performed.

The event signal determination unit 231 monitors an event signal input from the controller operation system unit 220 and performs control processing according to the input event signal.
The video input processing unit 232 performs control processing for displaying an image input from the user PC 90 on the user PC screen 28 of the image display surface 22.
The image drawing processing unit 234 generates a handwritten graphic based on the coordinate position data input from the touch panel 24 via the event signal determination unit 231. Further, the image drawing processing unit 234 superimposes a handwritten graphic on the already displayed image and displays it on the image display surface 22 of the display 20.
The screen erasure processing unit 236 generates a graphic with the background color of the currently displayed image based on the coordinate position information input from the touch panel 24 via the event signal determination unit 231. As a result, the background color graphic is superimposed on the already displayed image and displayed on the image display surface 22 of the display 20.
As a result, the background color graphic is superimposed on the handwritten graphic displayed on the display 20 and apparently erased from the image display surface 22.

  The screen operation processing unit 238 converts the coordinate position information (signal) input from the touch panel 24 into a pointing device signal such as a mouse event, and turns on / off the screen operation unit 26 displayed on the image display surface 22 of the display 20. Performs processing by an off operation. Further, the screen operation processing unit 238 transmits information on the coordinate position touched by the pen-type input device 100 detected by the light receiving sensors 300 and 310 of the touch panel 24 to the controller operation system unit 220 together with the coordinate value as a mouse down event. Further, when the pen-type input device 100 is moved while being in contact with the image display surface 22 of the touch panel 24, it is transmitted to the controller operation system unit 220 together with the coordinate value as a mouse up event.

The light reception control circuit 350 detects the coordinates of the pen-type input device 100 as coordinate detection means. Specifically, the light reception control circuit 350 detects the coordinates of the pen-type input device 100 on the image display surface 22 or the operation sheet 120 based on detection signals from the light reception sensors 300 and 310.
Further, the touch panel driver unit 250 converts the coordinate position signal and the writing detection signal or the erasure detection signal input from the pen-type input device 100 and the light reception control circuit 350 into predetermined event signals and transmits them to the controller operation system unit 220. .
When the pen signal receiving unit 210 receives a writing detection signal or an erasure detection signal from the pen-type input device 100, the touch panel driver unit 250 transmits the writing detection signal or the erasure detection signal together with the coordinate position signal to the controller operation system unit 220. To do.
The light reception control circuit 350 calculates the coordinates of the pen-type input device 100 and the finger based on the output of the first detection signal and the second detection signal detected by the light reception sensor 410, and controls the light emission of the light emitting unit 420. .

Here, the principle of the coordinate detection apparatus according to the present embodiment will be described.
FIG. 6 is a diagram illustrating the principle of position detection of the pen-type input device in the coordinate detection device according to the embodiment.
In the present embodiment, input detection and position detection on the operation sheet 120 arranged on the image display surface 22 and the bezel portion 25 of the pen-type input device 100 equipped with light emitting elements are performed.
The pen-type input device 100 is equipped with a light emitting element 110. When the pen tip 100A comes into contact with the image display surface 22, infrared light emitted from the light emitting element 110 enters the light receiving sensors 300 and 310. At this time, the amount of infrared light at the position where the pen-type input device 100 is in contact with the image display surface 22 is increased, and the angle can be calculated from the detection results of the light receiving sensors 300 and 310.
FIG. 7 is a graph showing an output of a detection signal by the light receiving sensor in the coordinate detection apparatus shown in FIG.

As shown in FIG. 8, when infrared light is emitted from the light emitting element 110 mounted on the pen-type input device 100, the amount of light at that position protrudes and becomes large. The angle θ1 is obtained by the light receiving sensor 300 and the angle θ2 is obtained by the light receiving sensor 310, and the coordinates (X1, Y1) of the pen are calculated by the triangulation method.
When there are a plurality of pen-type input devices 100, a pen-type input device 100 is prepared by charging each pen-type input device 100 with a wireless signal transmitter, transmitting different signals, and receiving the signals on the touch panel 24. Can be identified.

FIG. 8 is a diagram illustrating a position detection state of the pen-type input device in the coordinate detection device according to the embodiment.
The touch panel 24 performs a coordinate detection device based on the principle described above. In this example, the light receiving sensors 300 and 310 are disposed at both upper corners of the image display surface 22 of the display 20. The light receiving sensors 300 and 310 each have an angle of view of 90 ° or more, and can detect not only the image display surface 22 but also the upper portion of the bezel portion 25 arranged around the image display surface 22. . The light receiving sensors 300 and 310 can be arranged at other positions as long as the image display surface 22 and the bezel portion 25 are within the angle of view, or two or more can be installed.
In the present embodiment, the operation sheet 120 including the operation symbol display unit 130 is arranged at an arbitrary position on the bezel portion 25, in the upper part in this example. In the operation symbol display unit 130, various operation symbols 131, 132, 133, 134, and 135 are described.

When the pen-shaped input device 100 touches any one of the operation symbols 131 to 135 of the operation symbol display unit 130 of the operation sheet 120 on the touch panel 24, the operation symbol designated based on the detected coordinates of the pen-shaped input device 100. 131 to 135 are specified.
The operation symbols 131 to 135 are specified based on the coordinates of the pen-type input device 100 output from the touch panel driver unit 250. Then, the screen operation processing unit 238 performs screen operation processing based on the specified operation symbols 131 to 135. As a result, the operation menu can be selected by instructing any of the operation symbols 131 to 135 in the operation symbol display unit 130 without overlapping the operation sheet 120 on the image display surface 22.
Thereby, it is possible to designate the operation process by instructing the operation sheet 120 arranged on the bezel portion 25 which is a position where the image display surface 22 is not hidden.

  At this time, an operation sheet placement portion 29 that is a display member placement portion for placing the operation sheet 120 on the bezel portion 25 is determined in advance. As a result, the operation menu can be designated without performing calibration on the position of the operation sheet 120.

  The touch panel 24 can be applied not only to a display device including the display 20 but also to a projector that projects an image on a screen. In this case, the mounting positions of the light receiving sensors 300 and 310 with respect to the screen are made constant, and the operation sheet 120 is arranged at a fixed position with respect to the positions of the light receiving sensors 300 and 310. Accordingly, the operation menu can be selected without performing calibration every time even in a device using a projector.

Second Embodiment
Next, a second embodiment of the invention will be described.
In the coordinate detection device according to the second embodiment, an operation sheet selected from operation sheets corresponding to a plurality of types of prepared operation contents is replaceably disposed on the operation sheet placement unit 29 of the touch panel 24. Some electronic information boards 10 can switch between different types of processing, for example, drawing processing or video reproduction processing having a stamp function.
FIG. 9 is a schematic diagram illustrating an example of an operation symbol display member in the electronic information board according to the second embodiment.

The operation sheet 120 shown in FIG. 9A corresponds to the drawing process.
In the operation symbol display unit 130 of the operation sheet 120, operation symbols 131 to 135 corresponding to each process of the drawing process are described. In this example, the operation symbol 131 indicates “end”, the operation symbol 132 indicates “page duplication”, the operation symbol 133 indicates “handwritten input”, the operation symbol 134 indicates “return”, and the operation symbol 135 indicates “forward”.
The operation sheet 150 shown in FIG. 9B corresponds to a video reproduction process having a stamp function.
In the operation symbol display section 160 of the operation sheet 150, operation symbols 161, 162, 163, 164, and 165 corresponding to video reproduction processing having a stamp function are described. In this example, the operation symbol 161 indicates “start”, the operation symbol 162 indicates “text input”, the operation symbol 163 indicates “important mark”, the operation symbol 164 indicates “playback”, and the operation symbol 165 indicates “fast forward”.

In the second embodiment, the touch panel 24 can select the operation sheet 120 or the operation sheet 150 and arrange it in the operation sheet arrangement unit 29, and recognizes the type of the operation sheet only by arranging the operation sheets 120 and 150. .
In other words, the operation sheets 120 and 150 include attribute transmission units 140 and 170 that transmit the attributes of the operation symbols, and the attribute of the attribute transmission units 140 and 170 is specified in the operation sheet arrangement unit 29 of the bezel unit 25. Attribute specifying means 180 is provided. In the present embodiment, as the attribute transmission units 140 and 170, a plurality of protrusions arranged in different patterns are used, and the attribute specifying unit 180 arranged in the operation sheet arrangement unit 29 includes the attribute transmission units 140 and 170. The arrangement state of the protrusion is detected.

In the present embodiment, projection information representing the projection pattern of each operation sheet 120, 150 is stored in advance in the screen operation processing unit 238 as, for example, 4-bit data in the electronic information board 10. For example, the projection information of the attribute transmission unit 140 of the operation sheet 120 is “1101”, the projection information of the attribute transmission unit 170 of the operation sheet 150 is “1011”, and is registered in the screen operation processing unit 238.
As a result, the attribute specifying unit 180 reads and acquires the protrusion pattern of the attribute transmission unit by simply replacing the operation sheets 120 and 150, and acquires the acquired result information and the registered protrusion information referenced from the screen operation processing unit 238. By collating, it is possible to recognize which operation sheet is selected, and to perform processing corresponding to each operation sheet.
The type of operation sheet can be 3 or more. In addition, the attribute transmission unit and the recognition unit are not limited to the protrusions, and other units such as an IC tag and a wireless tag can be employed.

<Configuration, operation and effect of exemplary embodiment of the present invention>
<First aspect>
In this aspect, an image display panel including an image display surface 22, a bezel portion 25 located outside the image display surface 22, and operation symbols 131 to 135 arranged on the bezel portion 25 for designating operation processing items. The operation sheet 120 displaying the image, the image display surface 22, and the operation sheet 120 are imaged, and the detection signal is output by receiving light from the pen-type input device 100 in contact with the image display surface 22 or the operation sheet 120. And at least two light receiving sensors 300 and 310, and a light receiving control circuit 350 for detecting coordinates of the pen-type input device 100 on the image display surface or the operation sheet 120 based on detection signals from the light receiving sensors 300 and 310. It is characterized by having.
According to this aspect, the operation sheet 120 is disposed on the bezel portion 25 located outside the image display surface 22, the image display surface 22 and the operation sheet 120 are imaged, and the image display surface 22 or the operation sheet is captured. The light from the pen-type input device 100 in contact with 120 can be imaged by the light receiving sensors 300 and 310 to detect the coordinates of the pen-type input device 100. Thereby, it is possible to designate the operation process by instructing the operation sheet 120 arranged on the bezel portion 25 which is a position where the image display surface 22 is not hidden.

<Second aspect>
This aspect is characterized in that the operation sheet 120 and the operation sheet 150 are arranged to be replaceable.
According to this aspect, it is possible to select different operation sheets 120 and 150 that are suitable for the operation content of the electronic information board 10. Thereby, it can apply to the electronic information board 10 provided with various functions.

<Third aspect>
In the present embodiment, one operation sheet can be arranged on the bezel portion 25 from among the operation sheets 120 and 150 on which different types of operation symbols are displayed. 150 includes attribute transmission units 140 and 170 that transmit the attribute of the operation symbol displayed on 150, and attribute specifying means 180 that specifies the attributes of the attribute transmission units 140 and 170.
According to this aspect, the attribute specifying unit 180 acquires the attribute of the attribute transmission unit of the operation sheet disposed on the bezel unit 25. As a result, the attributes of the operation sheet 120 or the operation sheet 150 can be easily acquired simply by placing the operation sheet on the bezel portion 25, and the operation by the operation sheet 120 or the operation sheet 150 can be selected.

<4th aspect>
This aspect includes a display 20 including an image display panel, the touch panel 24, and an image drawing processing unit 234 that displays a display image on the display 20 based on coordinates output from the touch panel 24. The electronic information board 10
According to this aspect, the operation symbols 131 to 135 of the operation sheet 120 arranged on the bezel portion 25 of the display 20 can be designated by the pen-type input device 100, and the operation of the pen-type input device 100 can be designated. Thereby, an operation symbol is not displayed on the image display surface 22 of the display 20, and the image display surface 22 of the electronic information board 10 can be effectively used in a wide range.

DESCRIPTION OF SYMBOLS 10 ... Electronic information board, 20 ... Display, 22 ... Image display surface, 25 ... Bezel part, 100 ... Pen-type input device, 120 ... Operation sheet, 130 ... Operation symbol display part, 131-135 ... Operation symbol, 300, 310 ... Reception sensor, 350 ... Reception control circuit

Japanese Patent No. 4785760

Claims (4)

An image display panel comprising an image display surface, a bezel portion located outside the image display surface;
An operation symbol display member arranged on the bezel portion and displaying an operation symbol for designating an operation processing item;
At least two imaging means for imaging the image display surface and the operation symbol display member, receiving light from the light emission indicator that is in contact with the image display surface or the operation symbol display member, and outputting a detection signal When,
A coordinate detection apparatus comprising: coordinate detection means for detecting coordinates of the light emission indicator on the image display surface or the operation symbol display member based on a detection signal from the imaging means.   The coordinate detection device according to claim 1, wherein the operation symbol display member is arranged to be replaceable. In the bezel portion, one operation symbol display member can be arranged from a plurality of operation symbol display members on which different types of operation symbols are displayed.
The operation symbol display member includes an attribute transmission unit that transmits an attribute of the operation symbol displayed on the operation symbol display member.
The coordinate detection apparatus according to claim 2, further comprising attribute specifying means for specifying an attribute of the attribute transmitting unit. An image display device comprising an image display panel;
A coordinate detection device according to any one of claims 1 to 3,
An electronic information board comprising: a display control device configured to display a display image on the image display device based on coordinates output from the coordinate detection device.

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