JP2001290604A - Coordinate input/detection device, electronic blackboard system, coordinate position detecting method and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coordinate input/detection device, capable of highly accurately detecting a two-dimensional(2D) coordinate position pointed by a pointing means by excluding cases where a pointing means does not really touches a detection plane but is just proximate thereto, when calculating the coordinate position. SOLUTION: When the receiving state of a reflecting mirror image 27' formed on a detection plane 2a for reflecting a detecting signal transmitted from a transmitting element 27 becomes almost '0' in a receiving element, it is judged that the a pointing means P points the detection plane 2a, and the two-dimensional coordinate position pointed by that pointing means P is calculated. Thus, concerning the position pointed by the operation of the pointing means P (operation similar to clicking operation by means of a mouse, for example), the coordinates of the position on the detection plane 2a actually touched by the pointing means P are calculated and used, and in the case the pointing means P does not actually touch the detection plane 2a but is just proximate thereto, can be excluded so that the coordinate position can be detected highly accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coordinate input / detection device for optically detecting a coordinate position indicated by an indicating member such as a pen or an indicating means such as a finger for inputting or selecting information. The present invention relates to an electronic blackboard system mainly including a coordinate input / detection device, a coordinate position detection method in the coordinate input / detection device, and a storage medium storing a computer-readable program for causing a computer to execute the coordinate position detection.

[0002]

2. Description of the Related Art Conventionally, handwritten information written on a writing surface such as a whiteboard or a writing sheet by using a writing instrument is read by a dedicated scanner and output to recording paper by a dedicated printer. Blackboard devices are known. On the other hand, in recent years, a coordinate input / detection device is arranged on a writing surface of an electronic blackboard device, and information written by hand on the writing surface can be input to a computer such as a personal computer in real time. An electronic blackboard system is also provided.

For example, a software board manufactured by Microfield Graphics, Inc. (Microfield Graphics, Inc.) is configured by arranging a coordinate input / detection device on a whiteboard. This is a device that makes it possible to capture visual data such as pictures into a computer in real time. In an electronic blackboard system configured using this software board, visual data captured by the software board is input to a computer and displayed on a CRT (Cathode Ray Tube), or displayed on a large screen using a liquid crystal projector. It is possible to output to a recording paper by a printer. Further, it is also possible to project a screen of a computer to which the software board is connected on the software board with a liquid crystal projector and to operate the computer on the software board.

[0004] Further, a display device for displaying characters and images, a coordinate input / detection device having a coordinate input surface (touch panel surface) disposed on the front surface of the display device, and an input from the coordinate input / detection device. There is provided an electronic blackboard system including a control device for performing display control of the display device, and using the display device and the coordinate input / detection device to configure the display surface and the writing surface of the electronic blackboard unit.

[0005] For example, a Smart 2000 manufactured by SMART Technologies Inc. uses a liquid crystal projector connected to a computer to project characters, pictures, figures, and graphics onto the panel. Of a handwriting information into a computer by using a coordinate input / detection device arranged in front of the projection surface (display surface). Then, the handwritten information and the image information are combined in the computer, and can be displayed again in real time via the liquid crystal projector.

In such an electronic blackboard system, an image input using the coordinate input / detection device can be displayed as an overwrite image on an image on the screen displayed by the display device, so that a conference, a presentation, etc. ,
It has already been widely used in educational sites and the like, and its use effect has been highly evaluated. The electronic blackboard system is also used as an electronic conference system by incorporating a communication function such as voice and image into the electronic blackboard system and connecting remote locations with a communication line.

As a method of a coordinate input / detection device provided in such an electronic blackboard system, a film-like coordinate input / detection device provided by being stacked on a display screen of a display device or the like is used. A so-called touch panel, which is a method of providing a special function to a surface (touch surface) and detecting a characteristic change due to touch, is often used.
There are a pressure-sensitive system, a capacitance system, an ultrasonic surface acoustic wave system, and the like. According to such a touch panel, it is excellent in detection accuracy because it detects that a finger or the like has actually touched, but the size of the touch panel is limited due to the use of special materials and mechanisms. Thus, there is a problem that the method cannot be applied to a large-screen display device. In addition, since the light transmittance is low on the coordinate input / detection surface (touch surface) of such a touch panel, the image quality of the display image is deteriorated when the touch panel is stacked on the display screen of the display device. Problem. Further, such a touch panel has a problem that the coordinate input / detection surface (touch surface) is easily damaged.

Therefore, in recent years, it has been considered that an optical coordinate input / detection device, which enables input without a physical surface such as a coordinate input / detection surface (touch surface), is promising. It is considered. Various methods have been proposed as such an optical coordinate input / detection device.

As an example of an optical coordinate input / detection device, there is a coordinate input / detection device described in JP-A-11-110116. Japanese Patent Application Laid-Open No. H11-110116
FIG. 1 shows a coordinate input / detection device 100 described in FIG.
As shown in FIG. 9, the laser beam light B emitted from the light sources 102 provided in the two optical units 101, respectively.
Is scanned using a polygon mirror 103, and the laser beam B is reflected by a retroreflective member 104, and a coordinate input / detection area 105 is formed.
If the laser beam B in the coordinate input / detection area 105 is blocked by inserting the pointing means A, such as a fingertip or a pen, into the coordinate input / detection area 105, the two optical units 101 The number of pulses of a pulse motor (not shown) that rotates the polygon mirror 103 is detected based on the intensity distribution of light in the light receiving element 106 provided in each of the light receiving elements 106, and the indicating means A responds to the detected number of pulses. The emission angle of the laser beam B that is blocked is determined for each optical unit 101, and the coordinate position (x, y) at which the indicating means A is inserted is detected by a triangulation method based on the emission angles.

An optical coordinate input / detection device having no physical surface such as a coordinate input / detection surface (touch surface) as described above is mounted on a display screen of a display device and used. Even in this case, the image quality of the displayed image is not degraded, the visibility is excellent, and the size thereof is relatively easy.

[0011]

However, the coordinate input / detection device as described above is positioned as a powerful tool for inputting and selecting information with the spread of personal computers and the like. However, there are many issues that are not perfect, but must be solved for full-scale practical application.

FIG. 20 shows a coordinate input / detection device 10.
FIG. 20A shows a case where a finger A indicates the coordinate input / detection area 105 of 0, and FIG. 20A shows a plasma display panel (PDP: Plasma Display) having a flat display surface 202.
Panel) 201 is provided with the coordinate input / detection device 100. As shown in FIG. 20A, the laser beam B forming the coordinate input / detection area 105 is applied to the PDP 201.
Is scanned at a fixed interval from the display surface 202 of the laser beam, and when a point on the display surface 202 is pointed by the finger A as the indicating means, the laser beam light is emitted before the finger A touches the display surface 202. B will be cut off. However, as shown in FIG. 20 (a), when the other direction perpendicular to the laser beam B has instructed a point of the display surface 202 with a finger A is actually touched points p ₁ and the coordinate input / At a point p ₂ detected by the detection device 100,
Parallax will occur. When such parallax occurs, it is difficult to accurately draw characters and pictures.

FIG. 20B shows a projector screen 30 having a slightly concave display surface 302.
1 is an example in which a coordinate input / detection device 100 is provided. When the display surface 302 is curved as in the display surface 302 of the projector screen 301 shown in FIG. 20B, the touch is actually performed as compared with the case where the display surface 202 of the PDP 201 is flat as described above. since parallax between a point p ₄ is detected by the point p ₃ and the coordinate input / detection device 100 becomes larger, the problem becomes remarkable.

An object of the present invention is to eliminate the case where the pointing means is not actually in contact with the detection surface but is only close to the detection surface when calculating the two-dimensional coordinate position specified by the pointing means. An object of the present invention is to provide a coordinate input / detection device, an electronic blackboard system, a coordinate position detection method, and a storage medium that can perform position detection with high accuracy.

An object of the present invention is to provide a coordinate input / detection device, an electronic blackboard system, a coordinate position detection method, and a storage medium capable of detecting an operation similar to a non-click operation by a mouse for displaying a balloon help or the like. It is to provide.

[0016]

According to a first aspect of the present invention, there is provided a coordinate input / detection device having a two-dimensional coordinate input / detection region, and a detection device provided in accordance with the coordinate input / detection region. A coordinate input / detection device that detects a two-dimensional coordinate position of a pointing device that designates a surface, comprising: a transmitting element that emits a detection signal in the coordinate input / detection area; and a transmitting element that is formed on the detection surface. A receiving element disposed at a position for receiving a reflection mirror image, and a touch instruction detection for determining that the detection surface has been instructed by the instruction means when the reception state of the reflection mirror image at the reception element becomes substantially zero. Means, and a touch coordinate position calculating means for calculating a two-dimensional coordinate position specified by the specifying means when it is determined by the touch instruction detecting means that the specifying means has specified the detection surface.

Therefore, when the receiving state of the reflection mirror image formed on the detecting surface for reflecting the detecting signal emitted from the transmitting element becomes substantially zero in the receiving element, it is determined that the detecting surface is instructed by the indicating means. The two-dimensional coordinate position designated by the designation means is calculated. Thus, the coordinates of the position where the pointing device actually touches the detection surface are calculated and used for the pointing position by the operation of the pointing device (for example, the same operation as a click operation by a mouse), so that the pointing device detects the position. Since it is possible to eliminate a case in which the surface is not actually in contact with the surface but only in proximity, the coordinate position can be detected with high accuracy.

According to a second aspect of the present invention, in the coordinate input / detection apparatus according to the first aspect, the approaching distance of the pointing means inserted into the coordinate input / detection area is determined by a receiving state of the reflection mirror image at the receiving element. Approach distance detecting means for detecting in accordance with the distance, and when the approach distance of the indicating means detected by the approach distance detecting means is constant within a predetermined period, the indicating means indicates the coordinate input / detection area. Non-touch instruction detecting means for determining that the coordinate input / input has been performed by the non-touch instruction detecting means.
A non-touch coordinate position calculating means for calculating a two-dimensional coordinate position specified by the specifying means when it is determined that the detection area is specified;

Therefore, if the approaching distance of the pointing means inserted into the coordinate input / detection area detected according to the receiving state of the reflecting mirror image at the receiving element is constant within a predetermined period, the coordinate input / detection area Is determined as having been instructed by the instructing means, and the two-dimensional coordinate position instructed by the instructing means is calculated. This makes it possible to detect an operation similar to a non-click operation by a mouse for displaying, for example, balloon help or the like, so that a more user-friendly user interface can be obtained.

The invention according to claim 3 is the invention according to claim 1 or 2
The coordinate input / detection device according to claim 1, wherein the transmission area of the transmission element is such that the height of the reflection mirror image formed on the detection surface by the transmission element as viewed from the reception element is the coordinate input as viewed from the reception element. / Set so as not to exceed the height of the detection area.

Therefore, it is possible to minimize the height of the pointing means necessary for detecting the contact of the pointing means.

The invention according to claim 4 is the invention according to claim 1 or 2.
The coordinate input / detection device according to claim 1, wherein the transmission area of the transmission element is such that the height of the reflection mirror image formed on the detection surface by the transmission element as viewed from the reception element is the coordinate input as viewed from the reception element. / It is set to be higher than the height of the detection area.

Therefore, since the entire detection surface can be covered, it is possible to detect the specified position even when any position on the detection surface is specified. In addition, since the reflecting mirror image is enlarged if it has a concave surface shape, it is possible to accurately detect the indicated position even when the detection surface is bent and curved by touch pressing by the indicating means.

According to a fifth aspect of the present invention, in the coordinate input / detection device according to the fourth aspect, a mirror is provided above the transmitting element.

Therefore, when the reflection mirror image seen from the receiving element becomes larger than the actual size of the transmitting element, an inexpensive and small-sized transmitting element can be used and the size of the device can be reduced. This can save space.

The invention according to claim 6 is the invention according to claims 1 to 5
The coordinate input / detection device according to any one of the above, further comprising a reception restricting unit that allows the reception element to only receive the reflection mirror image.

Therefore, the receiving element receives only the reflecting mirror image, so that the height of the pointing means can be suppressed to be equal to the height of the reflecting mirror image.

According to a seventh aspect of the present invention, in the coordinate input / detection device according to the sixth aspect, there is provided a position adjusting means for adjusting the position of the reception restricting means.

Therefore, it is possible to ensure that the receiving element receives only the reflection mirror image.

[0030] The invention according to claim 8 provides the invention according to claims 1 to 7.
In the coordinate input / detection device according to any one of the above, a large number of the transmitting elements and the receiving elements are arranged in a horizontal direction and a vertical direction of the coordinate input / detection area, respectively, and the transmitting elements and the receiving elements are paired with the transmitting elements. A two-dimensional coordinate position is calculated based on a receiving state of the reflection mirror image in each receiving element.

Therefore, with the conventional configuration in which the transmitting element and the receiving element are spaced apart from each other in a matrix, it is possible to eliminate the case where the indicating means does not actually contact the detection surface but merely comes close to it. become.

[0032] The ninth aspect of the present invention is the first to seventh aspects.
In the coordinate input / detection device according to any one of the above, the transmitting element is a line light emitter or a surface light emitter, and the receiving element is an image sensor, and a triangulation method based on an image forming position in the image sensor. Calculate the two-dimensional coordinate position.

Therefore, by using a line light emitter or a surface light emitter as the transmitting element, the number of components can be reduced as compared with a case where a large number of light emitters are arranged, thereby reducing the cost of the apparatus. Can be

An electronic blackboard system according to a tenth aspect of the present invention has a display surface which is a detection surface for reflecting a detection signal emitted from the transmitting element, and displays characters and images, and the display device. The coordinate input / detection device according to any one of claims 1 to 9, wherein the coordinate input / detection region is arranged on the display surface of the display device so as to match the coordinate input / detection region, and the display is performed based on an input from the coordinate input / detection device. And a control device for controlling display of the device. The display device and the coordinate input / detection device constitute a display surface and a writing surface of the electronic blackboard.

Therefore, when the coordinate input / detection device is mounted on the display surface of the display device and used, the detection signal emitted from the transmitting element is reflected on the display surface serving as the detection surface to form a reflection mirror image. , Coordinate input surface (touch panel surface)
It is possible to provide an inexpensive electronic blackboard system having no physical surface as described above and having excellent visibility.

An electronic blackboard system according to an eleventh aspect of the present invention includes a writing board having a writing surface which is a detection surface for reflecting a detection signal emitted from the transmitting element and receiving writing of characters and images, and the writing board. The coordinate input / detection device according to any one of claims 1 to 9, wherein the coordinate input / detection region is arranged so as to coincide with a writing surface of a board, and the coordinate input / detection device is configured to input the coordinate input / detection device based on an input from the coordinate input / detection device. And a control device for controlling information written on the writing board, wherein the writing board and the coordinate input / detection device are used to form a writing surface of an electronic blackboard.

Therefore, when the coordinate input / detection device is mounted on the writing surface of the writing board and used, the detection signal emitted from the transmitting element is reflected on the writing surface, which is the detection surface, to form a reflection mirror image. It is possible to provide an inexpensive electronic blackboard system that does not have a physical surface such as a coordinate input surface (touch panel surface) and has excellent visibility.

According to a twelfth aspect of the present invention, in the electronic blackboard system according to the tenth or eleventh aspect, a display surface of the display device or a writing surface of the writing board is non-planar.

Therefore, the reflecting mirror image is reflected along the curved mirror surface even if the mirror surface is curved. Therefore, even if the surface is a projector screen having a concave surface, for example, the pointing means does not actually touch the detection surface. Since it is possible to eliminate cases that are only close to each other, the versatility of the system is increased. Further, if the shape is a concave surface, the reflection mirror image is enlarged and lengthened, so that the height of the transmitting element can be shortened and the manufacturing cost of the system can be reduced.

According to a thirteenth aspect of the present invention, there is provided a coordinate position detecting method, comprising a two-dimensional coordinate input / detection area, and a pointing means for designating a detection surface provided in accordance with the coordinate input / detection area. A coordinate position detecting method for detecting a two-dimensional coordinate position, comprising: a transmitting element for generating a detection signal in the coordinate input / detection area; and a transmitting element formed on the detection surface for receiving a reflection mirror image of the transmitting element. A touch element detecting step for determining that the detection surface has been instructed by the indicating means when the receiving state of the reflecting mirror image at the receiving element has become substantially zero; and A touch coordinate position calculating step of calculating a two-dimensional coordinate position instructed by the instructing means when it is determined that the means has instructed the detection surface.

Accordingly, when the reception state of the reflection mirror image formed on the detection surface that reflects the detection signal emitted from the transmission element becomes substantially zero in the reception element, it is determined that the detection surface has been instructed by the instruction means. The two-dimensional coordinate position designated by the designation means is calculated. Thus, the coordinates of the position where the pointing device actually touches the detection surface are calculated and used for the pointing position by the operation of the pointing device (for example, the same operation as a click operation by a mouse), so that the pointing device detects the position. Since it is possible to eliminate a case in which the surface is not actually in contact with the surface but only in proximity to the surface, the coordinate position can be detected with high accuracy.

According to a fourteenth aspect of the present invention, in the coordinate position detecting method according to the thirteenth aspect, the approach distance of the pointing means inserted into the coordinate input / detection area is set to a receiving state of the reflection mirror image in the receiving element. And a non-touch indication detecting step of determining that the indication means has instructed the coordinate input / detection area when the approach distance of the indication means is constant within a predetermined period. And a non-touch coordinate position calculating step of calculating a two-dimensional coordinate position specified by the specifying means when it is determined that the specifying means has specified the inside of the coordinate input / detection area.

Therefore, if the approaching distance of the pointing means inserted into the coordinate input / detection area detected according to the receiving state of the reflecting mirror image at the receiving element is constant within a predetermined period, the coordinate input / detection area Is determined as having been instructed by the instructing means, and the two-dimensional coordinate position instructed by the instructing means is calculated. This makes it possible to detect an operation similar to a non-click operation by a mouse for displaying, for example, balloon help or the like, so that a more user-friendly user interface can be obtained.

According to a fifteenth aspect of the present invention, there is provided a storage medium having a two-dimensional coordinate input / detection area, and a two-dimensional coordinate input / detection means for indicating a detection surface provided in accordance with the coordinate input / detection area. A coordinate input / detection device for detecting a coordinate position, comprising: a transmitting element for generating a detection signal in the coordinate input / detection region; and a position for receiving a reflection mirror image of the transmitting element formed on the detection surface. And a computer-readable program that is used in a coordinate input / detection device provided with the receiving element and that causes the computer to detect a two-dimensional coordinate position of the pointing member that has pointed to the detection surface. A storage medium, wherein the program is a touch instruction detection unit that determines that the detection surface has been instructed by the instruction unit when a reception state of the reflection mirror image in the reception element becomes substantially zero. Features and, if the instruction means determines that an instruction to the sensing surface, to perform the touch coordinate position calculation function for calculating a two-dimensional coordinate position indicated by the instruction means, the said computer.

Therefore, when the receiving state of the reflecting mirror image formed on the detecting surface for reflecting the detecting signal emitted from the transmitting element becomes substantially zero in the receiving element, it is determined that the detecting surface is instructed by the indicating means. The two-dimensional coordinate position designated by the designation means is calculated. Thus, the coordinates of the position where the pointing device actually touches the detection surface are calculated and used for the pointing position by the operation of the pointing device (for example, the same operation as a click operation by a mouse), so that the pointing device detects the position. Since it is possible to eliminate a case in which the surface is not actually in contact with the surface but only in proximity to the surface, the coordinate position can be detected with high accuracy.

According to a sixteenth aspect of the present invention, in the storage medium according to the fifteenth aspect, the approach distance of the pointing means inserted into the coordinate input / detection area is determined according to a reception state of the reflection mirror image in the receiving element. An approach distance detection function for detecting, and a non-touch instruction detection function for determining that the instruction means has instructed the coordinate input / detection area when the approach distance of the instruction means is constant within a predetermined period, If it is determined that the instructing means has instructed the coordinate input / detection area, the computer is caused to execute a non-touch coordinate position calculating function of calculating a two-dimensional coordinate position instructed by the instructing means.

Therefore, if the approach distance of the pointing means inserted into the coordinate input / detection area detected according to the receiving state of the reflecting mirror image at the receiving element is constant within a predetermined period, the coordinate input / detection area Is determined as having been instructed by the instructing means, and the two-dimensional coordinate position instructed by the instructing means is calculated. This makes it possible to detect an operation similar to a non-click operation by a mouse for displaying, for example, balloon help or the like, so that a more user-friendly user interface can be obtained.

[0048]

FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG. Here, FIG. 1 is an external perspective view schematically showing the electronic blackboard system 1. FIG.
As shown in FIG. 1, an electronic whiteboard system 1 includes an electronic whiteboard unit 4 including a plasma display panel (PDP) 2 which is a flat panel display (flat panel display) and a coordinate input / detection device 3, and a device. The storage unit 9 is mainly configured. The device housing 9 includes a computer 5 such as a personal computer as a control device, a scanner 6 for reading an image of a document, a printer 7 for outputting image data to recording paper, and a video player 8 (see FIG. 2). It is stored. In addition,
As the PDP 2, a large screen type that can be used as an electronic blackboard is used. Although details will be described later, a so-called LED array type coordinate input / detection device is applied to the coordinate input / detection device 3.

The PDP 2 and the coordinate input / detection device 3
It is integrated so as to be located on the display surface 2a side of the DP2, and coordinate input / output is performed on the display surface 2a of the PDP 2.
The electronic blackboard part 4 is formed so that the coordinate input / detection area 3a of the detection device 3 substantially matches. That is, PDP2
The display surface 2a functions as a detection surface. As described above, the electronic blackboard unit 4 houses the PDP 2 and the coordinate input / detection device 3 and configures the display surface (the display surface 2a of the PDP 2) and the writing surface (the coordinate input / detection area 3a) of the electronic blackboard system 1. ing.

Further, although not shown, the PD
The P2 is provided with a video input terminal and a speaker, and is connected to various information devices and AV devices such as a video player 8 as well as a laser disk player, a DVD player, and a video camera, and uses the PDP 2 as a large-screen monitor. It is configured to be able to. The PDP 2 is also provided with adjusting means (not shown) for adjusting the display position, width, height, distortion, and the like of the PDP 2.

Next, the electrical connection of each part built in the electronic blackboard system 1 will be described with reference to FIG. FIG.
As shown in FIG.
, A PDP 2, a scanner 6, a printer 7, and a video player 8 are connected to each other, and a computer 5 controls the entire system. In addition, the computer 5 includes an instruction member P such as an instruction member such as a pen or a finger (FIG.
The controller 10 provided in the coordinate input / detection device 3 for calculating the coordinate position in the coordinate input / detection area 3a specified by the reference 1) is connected.
The coordinate input / detection device 3 is also connected to the computer 5 via the control unit 0. In addition, the electronic blackboard system 1 can be connected to the network 11 via the computer 5,
It is also possible to display data created by another computer connected to the network 11 on the PDP 2 and to transfer data created by the electronic blackboard system 1 to another computer.

Next, the computer 5 will be described.
Here, FIG. 3 is a block diagram showing an electrical connection of each unit built in the computer 5. As shown in FIG. 3, the computer 5 includes a CPU 12 for controlling the entire system.
(Central Processing Unit), a ROM (Read Only Memory) 13 storing a startup program and the like, and a CPU 12
RAM (Random Access) used as a work area for
Memory) 14, a keyboard 15 for inputting characters, numerical values, various instructions, etc., a mouse 16 for moving a cursor, selecting a range, etc., a hard disk 17,
A graphics board 18 connected to the DP 2 and controlling display of an image on the PDP 2, a network card (or a modem) 19 for connecting to the network 11, a controller 10, a scanner 6, and a printer 7. (I / F) 20 for connecting the components and the like, and a bus 21 for connecting the above components.
And

The hard disk 17 includes an operating system (OS) 22, a device driver 23 for operating the coordinate input / detection device 3 on the computer 5 via the controller 10,
Drawing software, word processor software, spreadsheet software,
Various application programs 24 such as presentation software are stored.

The computer 5 has a storage medium 26 storing various program codes (control programs) such as an OS 22, a device driver 23, and various application programs 24, that is, a floppy (registered trademark) disk, a hard disk, an optical disk ( CD-R
OM, CD-R, CD-R / W, DVD-ROM, DV
D-RAM, etc., a magneto-optical disk (MO), a floppy disk drive device which is a device for reading a program code stored in a memory card, etc., a CD-R
A program reading device 25 such as an OM drive device or an MO drive device is mounted.

The various application programs 24
OS2 that starts up when the power to the computer 5 is turned on
2 is executed by the CPU 12. For example, when the drawing software is activated by a predetermined operation of the keyboard 15 or the mouse 16, a predetermined image based on the drawing software is displayed on the PDP 2 via the graphics board 18. In addition, the device driver 23 is also an OS
It is started together with 22 and is in a state where data can be input from the coordinate input / detection device 3 via the controller 10. Entering coordinates /
When the user inserts the pointing means P into the coordinate input / detection area 3a of the detection device 3 and draws a character or a graphic, the coordinate information is input to the computer 5 as image data based on the description of the pointing means P, and is input to the PDP 2, for example. The image is displayed as an overwrite image on the image on the displayed screen. More specifically, the CPU 12 of the computer 5 generates drawing information for drawing a line or a character based on the input image data, and generates the drawing information in accordance with the coordinate position based on the input coordinate information. To a video memory (not shown) provided in the memory. Thereafter, the graphics board 18 transmits the drawing information written in the video memory to the PDP 2 as an image signal, so that the same characters as the characters written by the user are displayed on the PDP 2. That is, since the computer 5 recognizes the coordinate input / detection device 3 as a pointing device such as the mouse 16, the computer 5
The same processing as when writing characters using the mouse 16 on drawing software is performed.

Next, the coordinate input / detection device 3 will be described in detail. Here, FIG. 4 is an explanatory view schematically showing the configuration of the coordinate input / detection device 3, and FIG. 5 is a sectional view in the vertical direction. As shown in FIG. 4, the coordinate input / detection device 3 includes a light emitting diode (LE) as Xm transmitting elements.
D: Light Emitting Diode (Light Emitting Diode) 27 is arranged in the horizontal direction at regular intervals, and Xm receiving elements (PD: Ph
oto Diodes 29 are arranged opposite to each other at regular intervals, Yn LEDs 27 are arranged at regular intervals in the vertical direction, and light emitting element columns 28b are arranged at regular intervals. And a light receiving element row 30b opposed to each other at an interval. And these light emitting element arrays 2
8a, the light receiving element row 30a, the light emitting element row 28b, and the space surrounded by the light receiving element row 30b are the coordinate input / detection area 3a. That is, in the coordinate input / detection area 3a, m optical paths formed in the horizontal direction and n optical paths formed in the vertical direction can intersect in a matrix. Note that the coordinate input / detection area 3a is
This area has a size corresponding to the size of the display surface 2a of the PDP 2 and is formed in a horizontally long rectangular shape, and is an area in which characters, figures, and the like can be input by handwriting.

Further, as shown in FIG.
The LED 27 a is provided in contact with the end of the display surface 2 a of the PDP 2, and the lower end thereof is
The two display surfaces 2a are provided on the same surface. On the other hand, the PD 29 of the light receiving element row 30a is
The PDP 2 is provided at a position separated from the display surface 2a of the PDP 2 by a distance b and at a distance a above the same plane as the display surface 2a of the PDP 2.

Here, the relationship between the distance a and the distance b will be described. The length in the height direction of the display surface 2a of the PDP 2 is W ₁ (see FIG. 4), and the LE of the light receiving element row 30a is
Assuming that the height of D27 is Ha, the relationship between the distance a and the distance b can be expressed as b = W ₁ × (a / Ha) (1).

[0059] The distance a is made as since sufficiently smaller than the height direction of the length W ₁ of the display surface 2a of the PDP 2, the incident angle of PD29 is small relative to the display surface 2a of the PDP 2. Thus, PDP
By setting the incident angle of the PD 29 to the display surface 2a of the PDP 2 small, minute scratches and roughening of the display surface 2a of the PDP 2 become extremely fine in appearance.
(The apparent spatial frequency goes up). In other words, since the mirror looks like a smooth mirror, the reflection mirror image of the LED 27 described later becomes clear. Further, a clear reflecting mirror image can be obtained even when general anti-glare processing is performed.

Since the display surface 2a of the PDP 2 is formed of a flat glass plate, a transparent acrylic plate, or the like, coordinate input / output is performed on the display surface 2a of the PDP 2.
When the detection device 3 is installed, as shown in FIG.
LE in contact with the end of the display surface 2a of DP2
LED2 that emits light by installing D27
7 is reflected on the display surface 2a of the PDP 2. When the PD 29 is provided at a position that satisfies the expression (1), as shown in FIG. 5, the PD 29 has a length Hb of the reflecting mirror image 27 ′ when the display surface 2 a of the PDP 2 is viewed obliquely from above. , Hb = Ha (2) As described above, when the above expression (2) is satisfied, the entire display surface 2a (coordinate input / detection area 3a) of the PDP 2 is covered by the PD 29 of the light receiving element row 30b.

Further, assuming that the height of the indicating means P required to detect the contact of the indicating means P on the display surface 2a of the PDP 2 is Hm, it can be expressed as follows: Hm = Ha + Hb = 2Ha (3) . That is, by satisfying the expression (3), it is possible to minimize the height of the pointing means P necessary for detecting the contact of the pointing means P.

In FIG. 5, the light emitting element array 28a
And the light receiving element row 30a has been described.
It goes without saying that the same applies to the positional relationship between the light emitting element row 28b and the light receiving element row 30b. However, in this case, the relationship between the distance a and the distance b relating to the installation position of the PD 29 in the light receiving element row 30b can be expressed as b = W ₂ × (a / Ha) (4). Here, W ₂ is PDP2
Of the display surface 2a in the width direction (see FIG. 4).

Next, the electrical connection of each part of the coordinate input / detection device 3 will be described with reference to FIG. As shown in FIG. 7, the controller 10 is provided with a CPU 31 for centrally controlling each unit. This CPU 31 has a ROM for storing programs and data, and a work area for storing various data in a rewritable manner. RA functioning as
M and a memory 32 such as a hard disk for storing various program codes (control programs) are connected.
Further, the CPU 31 has a storage medium 33 storing various program codes (control programs), that is, a floppy disk, a hard disk, and an optical disk (CD).
-ROM, CD-R, CD-R / W, DVD-ROM,
A floppy disk drive, which is a device for reading program codes stored in a DVD-RAM, a magneto-optical disk (MO), a memory card, or the like; a CD
-A program reading device 34 such as a ROM drive device or an MO drive device is connected. The various program codes (control programs) stored in the storage medium 33 or the various program codes (control programs) stored in the hard disk or the like of the memory 32 are:
When the power to the controller 10 is turned on, it is written into the RAM of the memory 32, and various program codes (control programs) are executed.

The CPU 31 has a light emitting element array 28a.
An X scanning circuit 35 that switches and drives each LED 27 one by one and scans it, and a Y scanning circuit 36 that switches and drives each LED 27 of the light emitting element row 28b one by one and scans. In addition, the CPU 31 has an X multiplexer 37 that samples a detection signal corresponding to the amount of light received by each PD 29 of the light receiving element array 30a in a time-division manner and outputs the signal at regular intervals, and an amount of light received by each PD 29 of the light receiving element array 30b. And a Y multiplexer 38 which samples the detection signal corresponding to the time division by time division and outputs the sampled signal at regular intervals. The CPU 31 sends a switching control signal to the scanning circuits 35 and 36 and the multiplexers 37 and 38, respectively, and sequentially switches (scans) the opposing LED 27 and PD 29 in pairs. As a result, (m +
n) Only one optical path is formed at the same time,
By being sequentially formed in a time-sharing manner, light interference is prevented.

Further, the CPU 31 has an A / D (Analog
/ Digital) converter 39, contact determination unit 40, distance detection unit 41, coordinate calculation unit 42, and coordinate output unit 43 are connected. The operation of each unit that is driven and controlled by the CPU 31 will be described below.

The A / D converter 39 converts a detection signal corresponding to the amount of received light in each PD 29 output from the multiplexers 37 and 38 into a digital signal.
1, contact determination unit 40, distance detection unit 41, coordinate calculation unit 42
Output to

The contact judging section 40 is a circuit section composed of a comparator and the like.
Is compared with a complete concealment reference value, which is a threshold value previously stored in the memory 32, based on the digital signal output from the PDP 2 to determine whether or not the indicating means P has touched the display surface 2a of the PDP 2. Things. When the complete concealment reference value appears in the digital signal (output voltage value) output from the A / D converter 39, the contact determination unit 40 determines that the indicating means P has touched the display surface 2a of the PDP 2. In the present embodiment, the complete concealment reference value is such that the amount of received light at PD 29 is “ＰＤ0”.
Is set to the output voltage value in the case of. That is,
The contact determination unit 40 determines the paired LED 27 based on the amount of light received by each PD 29 facing the LED 27 that is sequentially driven.
The presence / absence of a touch by the instruction means P between the device and the PD 29 is determined for all pairs.

The distance detecting section 41 is a monotonic function calculator, and calculates the P / P based on the increase or decrease of the output voltage value based on the amount of light received by the PD 29 output from the A / D converter 39.
This is for detecting the distance of the indicating means P from the display surface 2a of the DP2. Here, an approach distance detecting means is realized.

The coordinate calculation unit 42 calculates the coordinate input / detection area 3
(a) is a circuit unit for calculating the coordinate position indicated by the indicating means P based on the determination result of the contact determining unit 40, and in the X direction and the Y direction in which the contact determining unit 40 determines that there is a touch by the indicating means P. Each LED
The coordinate position indicated by the indicating means P is calculated from the position of the pair of 27 and PD29. In addition, the coordinate calculation unit 42
Is the PD detected by the distance detection unit 41 at the coordinate position indicated by the indicating means P in the coordinate input / detection area 3a.
A circuit section for calculating based on the distance of the pointing means P with respect to the display surface 2a of P2.
The coordinate position indicated by the indicating means P is calculated from the paired position of the LED 27 and PD 29 in each direction.

The coordinate output section 43 is a circuit for outputting the coordinate position calculated by the coordinate calculation section 42 to the computer 5. When a coordinate output control signal is input from the CPU 31, the coordinate output section 43 calculates the coordinate position. The designated coordinate position is output as input coordinates by the instruction means P. In addition, CPU
31 again determines the presence or absence of a touch by the indicating means P between the pair of the LED 27 and the PD 29 at the position corresponding to the coordinate position calculated by the coordinate calculation unit 42 based on the determination result from the contact determination unit 40 again, The coordinate output control signal is transmitted to the coordinate output unit 43 only when the presence of the touch by the instruction means P is detected again.

Subsequently, based on the control program, the CPU
The function executed by the function 31 will be described. Here, first, a touch coordinate detection process which is a characteristic function of the coordinate input / detection device 3 of the present embodiment will be specifically described below.

Here, FIG. 8 is an explanatory diagram showing a state in which the pointing means P enters the coordinate input / detection area 3a of the coordinate input / detection device 3, and FIG. 9 schematically shows a flow of the touch coordinate detection process. It is a flowchart. FIG. 8 shows a state in which the indicating means P enters the coordinate input / detection area 3a of the coordinate input / detection device 3 to indicate one point of the display surface 2a of the PDP 2 in a time series manner and from the viewpoint from the PD 29. ,
As the indicating means P enters the coordinate input / detection area 3a, the light emitted from the predetermined LED 27 is blocked (FIG. 8B). However, in the state shown in FIG. 8B, even if the light emitted from the LED 27 is blocked, the LED 2
7 is reflected on the display surface 2a of the PDP 2, so that the amount of light received by the PD 29 paired with the LED 27 does not change.

As the entry into the coordinate input / detection area 3a further proceeds, as shown in FIG. 8C, the light emitted from the predetermined LED 27 is completely blocked by the indicating means P, and the reflection mirror image 27 'is formed. Is covered by the indicating means P. In addition, a shadow of the pointing means P also occurs on the display surface 2a of the PDP 2. As a result, the amount of light received by the PD 29 paired with the LED 27 gradually decreases.

When the indicating means P comes into contact with the display surface 2a of the PDP 2, the reflecting mirror image 27 'of the predetermined LED 27 is completely hidden as shown in FIG. The amount of light received by the PD 29 paired with the LED 27 is “$ 0”.

That is, the CPU 31 detects the state in which the reflecting mirror image 27 'of the predetermined LED 27 is completely concealed by the indicating means P by the contact determining section 40, and the indicating means P indicates the display surface 2a. (Y in step S1 shown in FIG. 9). Here, the function of the touch instruction detecting means is executed. Then, the contact determination unit 4
X determined to be touched by the indicating means P at 0
The coordinate position indicated by the indicating means P is calculated by the coordinate calculation unit 42 from the position of each pair of the LED 27 and the PD 29 in the direction and the Y direction (step S shown in FIG. 9).
2). Here, the function of the touch coordinate position calculating means is executed. Then, the coordinate position calculated by the coordinate calculation unit 42 is output to the computer 5 as input coordinates by an operation of the indicating means P (for example, an operation similar to a mouse click operation) (step S3 shown in FIG. 9). ).

Therefore, the operation of the instruction means P (for example,
The pointing means P operates the display surface 2 of the PDP 2 with respect to the pointing position by the same operation as the click operation by the mouse).
By calculating and using the coordinates of the position that actually touched the a, it is possible to exclude a case where the display surface 2a of the PDP 2 is not actually in contact with the display surface 2a and is merely close to the display surface 2a. It can be performed with high accuracy.

Next, a non-touch coordinate detection process, which is a characteristic function of the coordinate input / detection device 3 of the present embodiment, will be specifically described below. Here, FIG.
9 is a flowchart schematically showing the flow of a non-touch coordinate detection process. Coordinate input / detection device 3 of the present embodiment
Is an operation similar to a non-click operation by a mouse for displaying, for example, a balloon help, in addition to the output of input coordinates by an operation of the instruction means P (for example, an operation similar to a click operation by a mouse) as described above. The output of the input coordinates is also possible.

More specifically, as shown in FIG. 8C, the light emitted from the predetermined LED 27 is completely blocked by the indicating means P and the reflecting mirror image 27 'is covered by the indicating means P. Is continued for a certain period of time, that is, when the indicating means P is stopped at a position close to the display surface 2a of the PDP 2 for a certain period of time, the LED 27 described above is used.
A certain period of time elapses in a state where the amount of received light in the PD 29 that is paired with is reduced.

That is, the CPU 31 determines whether the PD2
9 is a display surface 2 of the PDP 2 in which the state in which the amount of received light has decreased for a certain time is detected by the distance detection unit 41.
If the distance of the instruction means P to a does not change for a predetermined time, it is determined that the operation is the same as the non-click operation by the mouse (Y in step S11 shown in FIG. 10). Here, the function of the non-touch instruction detecting means is executed. After that, in the distance detecting section 41, the indicating means P approaches the LED 27 and the PD 2 in the X direction and the
A coordinate position indicated by the indicating means P is calculated by the coordinate calculation unit 42 from the position of the pair with No. 9 (step S12 shown in FIG. 10). Here, the function of the non-touch coordinate position calculating means is executed. Then, the coordinate position calculated by the coordinate calculation unit 42 is output to the computer 5 as input coordinates by an operation of the pointing means P (for example, an operation similar to a non-click operation by a mouse) (step S13 shown in FIG. 10). ).

Therefore, in addition to the contact detection of the operation of the pointing means P (for example, the same operation as a mouse click operation), the same operation as the non-click operation of the mouse for displaying balloon help or the like is detected. Therefore, a more user-friendly user interface can be obtained.

Here, the conventional configuration in which the LED 27 and the PD 29 are spaced apart from each other in a matrix form eliminates the case where the indicating means P is not actually in contact with the display surface 2a of the PDP 2 but is merely in proximity. It becomes possible.

A second embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the first embodiment of the present invention are denoted by the same reference numerals, and description thereof will be omitted. The coordinate input / detection device 50 according to the present embodiment is a modified example of the coordinate input / detection device 3 according to the first embodiment.
Means for receiving only the reflection mirror image 27 '.

FIG. 11 shows a coordinate input / detection device 50.
3 is a cross-sectional view in the vertical direction of FIG. As shown in FIG. 11, in addition to the configuration of the coordinate input / detection device 3 described in the first embodiment, the coordinate input / detection device 50 of the present embodiment cuts off the direct light from the PD 29. An optical mask 51, which is a reception restricting means for receiving only the reflection mirror image 27 'of the LED 27, and a condensing optical system 52 such as a lens and a slit are provided. Further, the coordinate input / detection device 50 is provided with a polarization filter 53 serving as a reception restricting means in front of the PD 29 to prevent direct light from an image displayed on the display surface 2a of the PDP 2 from entering the PD 29. , S / N ratio is improved.

In addition, on the display surface 2a side of the PDP 2 of the LED 27, an adjusting light emitting element (point light source) Q, which is a blinking light source for adjusting the position of the optical mask 51, is provided.
7 is provided detachably below. Note that the LED 27 when the light emitting element (point light source) Q for adjustment is removed.
LED2 in the coordinate input / detection device 3
It is no different from the installation state of 7. The optical mask 51 is provided in the direction of the arrow shown in FIG.
A drive mechanism (not shown) for moving the unit 1 forward and backward is connected. Further, a blinking cycle bandpass filter (not shown) is added to the PD 29 to distinguish between the LED 27 and the light emitting element (point light source) Q for adjustment, and the output of the blinking cycle bandpass filter is used as a Q component. I reckon.

The procedure for adjusting the mask position of the optical mask 51 will now be described. First, the optical mask 51 is set to the initial state (the lower position in FIG. 11), and the adjusting light emitting element (point light source) Q is installed and driven below the LED 27.
Next, the optical mask 51 is gradually moved upward by the driving of the driving mechanism, and a portion where the amount of light received from the adjustment light emitting element (point light source) Q in the PD 29 is attenuated is detected. As shown in FIG. 12, the point at which the Q component of the light amount is reduced by half is the optimal position of the optical mask 51,
When the optical mask 51 reaches the optimum position, the light emitting element (point light source) Q for adjustment is removed, and the mask position adjustment is completed. Here, a position adjusting means is realized. As a result, it is possible for the PD 29 to reliably receive only the reflection mirror image 27 ′ of the LED 27.

In the present embodiment, the position of the optical mask 51 is adjusted using the light emitting element (point light source) Q for adjustment. However, the present invention is not limited to this, and the LED 27 is covered with a thin black band or the like. May be adjusted.

When the PD 29 receives only the reflection mirror image 27 ′ of the LED 27 by providing the optical mask 51 as described above, it is necessary to detect the contact of the pointing means P on the display surface 2 a of the PDP 2. The height Hm of the indicating means P can be expressed as Hm = Hb = Ha (5). That is, it is sufficient that the height of the pointing means P is equal to the height of the reflecting mirror image 27 '. According to the coordinate input / detection device 50, the height is higher than that of the coordinate input / detection device 3 described in the first embodiment. , The coordinate position indicated by the indicating means P having a half size can be detected.

A third embodiment of the present invention will be described with reference to FIG. Note that the same parts as those described in the first embodiment or the second embodiment of the present invention are denoted by the same reference numerals, and description thereof is omitted. The coordinate input / detection device 60 of the present embodiment is a modification of the coordinate input / detection device 50 of the second embodiment,
In place of the LED 27, an LED 61 having a half size (height) of the LED 27 is provided.

FIG. 13 shows a coordinate input / detection device 60.
3 is a cross-sectional view in the vertical direction of FIG. As shown in FIG. 13, the coordinate input / detection device 60 of the present embodiment is different from the configuration of the coordinate input / detection device 50 described in the second embodiment in that the size of the LED 27 is half that of the LED 27. An LED 61 having a height (ha) (Ha '= Ha / 2) is provided, and an auxiliary mirror 62 is provided at an end of the LED 61 located on the opposite side of the PDP 2 from the display surface 2a.

With such a configuration, in the coordinate input / detection device 60, a reflection mirror image 63 of the LED 61 is reflected on the auxiliary mirror 62 as shown in FIG. Therefore, as shown in FIG. 13, the reflection mirror image 64 of the LED 61 and the LED 6 are provided on the display surface 2a of the PDP 2.
The reflection mirror image 65 of the first reflection mirror image 63 is reflected.

Here, considering the height Hm of the indicating means P required to detect the contact of the indicating means P on the display surface 2a of the PDP 2, Hm = Hb '+ Hc' ≒ by the aforementioned equation (5). 2Ha ′ (6) Since Ha ′ = Ha / 2, Hm = Ha (7), and the LED 6 having half the size (height) of the LED 27
Even if it is 1, the entire display surface 2a (coordinate input / detection area 3a) of the PDP 2 will be covered.

Therefore, an inexpensive small product can be used as the light emitting element (LED 61), and the space of the system can be reduced by reducing the size of the system.

A fourth embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the first to third embodiments of the present invention are denoted by the same reference numerals, and description thereof will be omitted. The coordinate input / detection device 70 of the present embodiment is a coordinate input / detection device of an imaging triangulation method that is different from the coordinate input / detection devices 3, 50, and 60 described above, and is instructed based on the principle of triangulation. The coordinate position designated by the means P is detected.

FIG. 14 shows a coordinate input / detection device 70.
FIG. 3 is an explanatory diagram schematically showing the configuration of FIG. As shown in FIG. 14, the coordinate input / detection device 70 includes a horizontally long rectangular coordinate input / detection area 70a having a size corresponding to the size of the display surface 2a of the PDP 2. The coordinate input / detection area 70a is an area in which characters, figures, and the like can be input by handwriting. This coordinate input / detection area 70
In the vicinity of the corners located at both lower ends of a, a number of CCDs for outputting image information (subject image) as electric signals
(A left image detecting device 73L, a right image) in which a line sensor 71, which is a receiving element in which (Charge Coupled Devices) are arranged in a line, and an imaging optical lens 72 are arranged with a distance f. The detection device 73R) determines that the distance L
At a predetermined angle α (see FIG. 18). In addition, these image detecting devices 73 (the left image detecting device 73L and the right image detecting device 73R) are provided with a mask 74 which is a reception restricting means for cutting external light.

Further, a light emitting element 75 as a transmitting element is provided on the periphery of the coordinate input / detection device 70 except for the lower part of the coordinate input / detection area 70a. This luminous body 75
For example, electroluminescence (E
L: Electroluminescence) and PDP
In the case where the coordinate input / detection device 70 is installed on the display surface 2a of the second light-emitting device 2, a reflecting mirror image 75 '
Is reflected on the display surface 2a of the PDP 2.

The height of the luminous body 75 and the line sensor 7
Since the installation position of 1 is the same as that described in the first to third embodiments of the present invention, the description is omitted.

Next, the electrical connection of each part of the coordinate input / detection device 70 will be described with reference to FIG. As shown in FIG. 15, the controller 10 is provided with a CPU 76 for centrally controlling each unit. The CPU 76 has a ROM for storing programs and data, and a work area for storing various data in a rewritable manner. Functioning as a RAM, various program codes (control programs)
Is connected to a memory 77 such as a hard disk or the like. Further, the CPU 76 has a storage medium 78 storing various program codes (control programs), that is, a floppy disk, a hard disk, an optical disk (CD-ROM, CD-R, CD-R / W, DVD-R).
OM, DVD-RAM, etc.), magneto-optical disk (M
O), a program reading device 79 such as a floppy disk drive device, a CD-ROM drive device, and an MO drive device, which is a device for reading a program code stored in a memory card or the like, is connected. The various program codes (control programs) stored in the storage medium 78 or the various program codes (control programs) stored in the hard disk or the like of the memory 77 correspond to power-on of the controller 10. Various program codes (control programs) are written into the RAM of the memory 77 and executed.

Further, a driving circuit 80 for causing the light emitting body 75 to emit light is connected to the CPU 76. in addition,
The CPU 76 includes an analog processing circuit 81 as a circuit for calculating an output from the line sensor 71, and an A / D (Analog /
Digital) converter 82 is connected. The light from the light emitter 75 incident on the line sensor 71 is converted into analog image data having a voltage value corresponding to the light intensity in the line sensor 71 and output as an analog signal.
This analog signal is processed by an analog processing circuit 81, converted to a digital signal by an A / D converter 82, and passed to the CPU 76.

Further, the CPU 76 includes a contact determination unit 8
3. The distance detection unit 84, the coordinate calculation unit 85, and the coordinate output unit 86 are connected. The operation of each unit that is driven and controlled by the CPU 76 will be described below.

The A / D converter 82 digitally converts a detection signal output from the analog processing circuit 81 in accordance with the amount of light received by each line sensor 71 of the image detecting device 73 (left image detecting device 73L, right image detecting device 73R). The signal is converted to a signal and output to the contact determination unit 83, the distance detection unit 84, and the coordinate calculation unit 85 in addition to the CPU 76.

The contact judging section 83 is a circuit section composed of a comparator and the like.
Is compared with a complete concealment reference value, which is a threshold value previously stored in the memory 77, based on the digital signal output from the CPU 77, and it is determined whether or not the indicating means P has touched the display surface 2a of the PDP 2. Things. When the complete concealment reference value appears in the digital signal (output voltage value) output from the A / D converter 82, the contact determination unit 83 determines that the instruction means P has touched the display surface 2a of the PDP 2. In the present embodiment, the complete concealment reference value is such that the amount of received light at PD 29 is “ＰＤ0”.
Is set to the output voltage value in the case of.

The distance detecting section 84 is a monotonic function computing unit. The distance detecting section 84 adjusts the output voltage value based on the amount of light received by each line sensor 71 output from the A / D converter 82 to the display surface 2 a of the PDP 2. It detects the distance of the instruction means P.

The coordinate calculation section 85 has a coordinate input / detection area 7
0a, which is a circuit unit for calculating the coordinate position indicated by the indicating means P based on the result of the judgment by the contact judging unit 83. The coordinate position indicated by the indicating means P is calculated by a triangulation method based on the light intensity distribution of each line sensor 71 of the left image detection device 73L and the right image detection device 73R. In addition, the coordinate calculating unit 85 calculates a coordinate position indicated by the indicating unit P in the coordinate input / detection area 70a based on the distance of the indicating unit P with respect to the display surface 2a of the PDP 2 detected by the distance detecting unit 84. Department,
The image detecting device 73 (the left image detecting device 73) when the instruction means P approaches to a certain distance in the distance detecting section 84.
L, the coordinate position indicated by the indicating means P is calculated by a triangulation method based on the light intensity distribution of each line sensor 71 of the right image detection device 73R).

The coordinate output section 86 is a circuit for outputting the coordinate position calculated by the coordinate calculation section 85 to the computer 5. When a coordinate output control signal is input from the CPU 76, the coordinate output section 86 calculates the coordinate position. The designated coordinate position is output as input coordinates by the instruction means P. In addition, CPU
76 determines again whether or not there is a touch by the indicating means P at the position corresponding to the coordinate position calculated by the coordinate calculating section 85 based on the determination result from the contact determining section 83, and again detects the presence of the touch by the indicating means P Only when this is done, a coordinate output control signal is sent to the coordinate output unit 86.

Subsequently, based on the control program, the CPU
The function performed by 76 will be described. Here, first, a touch coordinate detection process, which is a characteristic function of the coordinate input / detection device 70 of the present embodiment, will be specifically described below. Note that the flow of the processing does not differ from the flow shown in FIG. 8, and therefore, will be described with reference to FIG. Here, FIG. 16 is an explanatory diagram showing a state in which the pointing means P enters the coordinate input / detection area 70a of the coordinate input / detection device 70. FIG. 16 shows a state in which the indicating means P enters the coordinate input / detection area 70a of the coordinate input / detection device 70 in order to indicate a point on the display surface 2a of the PDP 2 in a time-series manner, and the line sensor of the right image detection device 73R. 71, the direct light from the luminous body 75 is cut off by the mask 74.
This shows a state where only the display surface 2a of the DP 2 is visible from the line sensor 71. FIG. 16 shows a state in which the indicating means P is sensed in the a-th light receiving cell of the line sensor 71 of the right image detecting device 73R. As shown in FIG. 16, the pointing means P is used for the coordinate input / detection area 7.
0a, the amount of light received by the line sensor 71 of the right side image detection device 73R decreases (see FIG. 1).
6 (b)).

When the pointing means P comes into contact with the display surface 2a of the PDP 2, as shown in FIG.
Since the reflection mirror image 75 'of the light emitting body 75 sensed in the second light receiving cell is completely hidden, the amount of light received in the a-th light receiving cell of the line sensor 71 of the right image detecting device 73R is "≒ 0". "become.

That is, the CPU 76 determines that the reflecting mirror image 75 'of the luminous body 75 sensed in the a-th light receiving cell of the line sensor 71 of the right image detecting device 73R is completely hidden by the indicating means P. Contact determination unit 8
3 to determine that the indicating means P has indicated the display surface 2a (Y in step S1 shown in FIG. 9). Here, the function of the touch instruction detecting means is executed. Thereafter, the position of the a-th light receiving cell of the line sensor 71 of the right image detecting device 73R determined to be touched by the instruction means P in the contact determining portion 83 and the b-th light receiving of the line sensor 71 of the left image detecting device 73L. Based on the position of the cell, the coordinate position indicated by the indicating means P is calculated by the coordinate calculation unit 85 by a well-known triangulation method (step S2 shown in FIG. 9). Here, the function of the touch coordinate position calculating means is executed.

Here, a method of calculating the coordinate position specified by the specifying means P will be described. FIG. 17 shows the coordinates input /
FIG. 18 is a front view showing an example in which one point in the coordinate input / detection area 70a of the detection device 70 is indicated, and FIG. The distance s from the position of the a-th light receiving cell of the line sensor 71 of the right image detecting device 73R whose received light amount is “≒ 0” to the light receiving cell at the center of the line sensor 71 is equal to the center line of the line sensor 71, and It depends on the angle θ1 formed between the means P and the line connecting the a-th light receiving cell, and this angle θ1 can be expressed as follows: θ1 = tan ⁻¹ (s / f) (8) it can. Where f is the imaging optical lens 72
Is the focal length.

Further, as shown in FIG. 18, the angle β1 between the right image detecting device 73R and the instruction means P is determined by using the mounting angle α of the right image detecting device 73R, as follows: β1 = α−θ1. 9) is calculated as

Similarly, the angle β2 between the left image detecting device 73L and the instruction means P is not shown in the figure, but the angle β2 described in the above (8)
Based on equation (9), β2 = α−θ2 (10)

As described above, since the left image detecting device 73L and the right image detecting device 73R are provided at a distance L, the position of the point designated by the designating means P in the coordinate input / detection area 70a. The two-dimensional coordinates (x, y) can be calculated as x = L · tanβ2 / (tanβ1 + tanβ2) (11) y = xtanβ1 (12) according to the principle of triangulation.

Thereafter, the coordinate position calculated by the coordinate calculation unit 85 is output to the computer 5 as input coordinates by the operation of the pointing means P (for example, the same operation as a mouse click operation) (FIG. 9). Step S
3).

Therefore, the operation of the instruction means P (for example,
The pointing means P is operated on the display surface 2
By calculating and using the coordinates of the position that actually touched the a, it is possible to exclude a case where the display surface 2a of the PDP 2 is not actually in contact with the display surface 2a and is merely close to the display surface 2a. It can be performed with high accuracy.

Next, the non-touch coordinate detection processing which is a characteristic function of the coordinate input / detection device 70 of the present embodiment will be specifically described below. Note that the flow of the processing does not differ from the flow shown in FIG. 10, and therefore, will be described with reference to FIG. The coordinate input / detection device 70 according to the present embodiment displays, for example, a balloon help or the like, in addition to the output of the input coordinates by the operation of the indicating means P (for example, the same operation as a mouse click operation) as described above. Output of input coordinates by the same operation as the non-click operation by the mouse is also enabled.

Specifically, as shown in FIG. 16 (b), when the state in which the amount of received light in the line sensor 71 of the right image detecting device 73R has been reduced has continued for a certain period of time, that is, when the indicating means P is turned on the display surface 2a of the PDP 2 If the distance between the pointing means P and the display surface 2a of the PDP 2 detected by the distance detection unit 84 does not change for a certain time, the CPU 76 performs the same operation as the non-click operation by the mouse. It is determined that the operation is performed (Y in step S11 shown in FIG. 10). here,
The function of the non-touch instruction detecting means is executed. Thereafter, the right image detection device 7 in which the instruction means P has approached to a certain distance.
The position of the a-th light receiving cell of the 3R line sensor 71,
Based on the position of the b-th light receiving cell of the line sensor 71 of the left image detection device 73L, the coordinate position indicated by the indicating means P is calculated by the coordinate calculation unit 85 by a well-known triangulation method (see FIG. 10). Step S12).
Here, the function of the non-touch coordinate position calculating means is executed. Then, the coordinate position calculated by the coordinate calculation unit 85 is output to the computer 5 as input coordinates by the operation of the pointing means P (for example, the same operation as a non-click operation by a mouse) (step S1 shown in FIG. 10).
3).

Therefore, in addition to the contact detection of the operation of the pointing means P (for example, the same operation as a mouse click operation), the same operation as the non-click operation of the mouse for displaying balloon help or the like is detected. Therefore, a more user-friendly user interface can be obtained.

Here, as a transmitting element, for example, an electroluminescence (EL) which is a surface emitting element is used.
luminescence) 75 is used,
Since the number of components can be reduced as compared with the case where a large number of light emitters are arranged, the cost of the device can be reduced. In the present embodiment, electroluminescence is used as the luminous body 75. However, the present invention is not limited to this, and a fluorescent lamp, a neon tube, an LED array + diffusion plate, or the like may be applied.

In each of the embodiments, the coordinate input / detection devices 3, 50, 60,
70 is a plasma display panel (PDP: Plasma Dis) which is a flat panel display (flat panel display).
play Panel) 2, but is not limited to this.
An LCD (Liquid Crystal Display), a liquid crystal rear projection display, or the like may be applied as a flat panel display. Further, the coordinate input / detection devices 3, 50, and 6 are not limited to the flat panel display device (flat panel display) but may be any material whose writing surface (detection surface) is optically reflected.
0, 70 may be provided on a whiteboard that functions as a writing board.

Further, in each embodiment, PDP2
Has been described on the condition that the display surface 2a is flat, but the present invention is not limited to this. Even if the mirror surface is curved, the reflected mirror image is reflected along the curved surface.
It is also possible to combine the detection devices 3, 50, 60, 70. However, in this case, the LED 27 or the light-emitting element is set so that the “height” of the reflecting mirror image viewed from the PD 29 or the line sensor 71 is higher than the “height” of the detection area surface viewed from the PD 29 or the line sensor 71. A height of 75 must be set. However, in general, if the concave shape is used, the reflection mirror image is enlarged and lengthened. In this case, the height of the LED 27 and the light emitter 75 can be shortened, so that the manufacturing cost of the system can be reduced. . Further, even when the projector screen is bent by touch pressure, the pointing position can be accurately detected.

Further, in each of the embodiments, it is possible to use ultrasonic waves having straightness instead of light. For example, an ultrasonic transmitter (40 kHz) is used as a transmitting element.
Using an ultrasonic receiver (such as a distance measuring product paired with a transmitter) as a receiving element, and using a transparent acrylic surface or a glass surface as a detection surface. Can be.

In each embodiment, the controller 10 is provided separately from the computer 5, but the present invention is not limited to this.
And the computer 5 may function as the controller 10.

In each embodiment, the coordinate input / detection device is integrated with the electronic blackboard system and incorporated. However, the present invention is not limited to this. It may be configured to be detachable.

Further, in each embodiment, a floppy disk, a hard disk, an optical disk (CD-ROM, CD-R, CD) is used as the storage media 26, 33, 78 storing various program codes (control programs).
−R / W, DVD-ROM, DVD-RAM, etc.), magneto-optical disk (MO), memory card, etc.
The storage medium is not limited to this, and the storage medium is not limited to a medium independent of a computer, but also includes a storage medium in which a program transmitted via a LAN, the Internet, or the like is downloaded and stored or temporarily stored.

[0124]

According to the coordinate input / detection device according to the first aspect of the present invention, the coordinate input / detection area has a two-dimensional coordinate input / detection area, and the detection surface provided in accordance with the coordinate input / detection area is provided. Coordinate input for detecting the two-dimensional coordinate position of the designated pointing means /
A detecting device for transmitting a detection signal within the coordinate input / detection area; a receiving element disposed at a position for receiving a reflection mirror image of the transmitting element formed on the detection surface; Touch instruction detecting means for determining that the detecting surface has been instructed by the instruction means when the receiving state of the reflection mirror image in the element has become substantially zero; and the pointing means detects the detecting surface by the touch instruction detecting means. Touch coordinate position calculating means for calculating a two-dimensional coordinate position specified by the specifying means when it is determined to have been specified, and a reflection mirror image formed on a detection surface for reflecting a detection signal emitted from the transmitting element When the receiving state of the receiving element becomes substantially zero in the receiving element, it is determined that the detecting surface is instructed by the instructing means, and the two-dimensional coordinate position instructed by the instructing means is calculated. Since the coordinates of the position where the pointing device actually touched the detection surface are calculated and used for the position indicated by the operation of the pointing device (for example, the same operation as a mouse click operation), the pointing device detects Since a case that does not actually touch the surface but merely comes close to the surface can be eliminated, the coordinate position can be detected with high accuracy.

According to the second aspect of the present invention, in the coordinate input / detection device according to the first aspect, the approach distance of the pointing means inserted into the coordinate input / detection area is determined by the distance of the reflection mirror image on the receiving element. Approach distance detecting means for detecting in accordance with a reception state, and the pointing means for moving the coordinate input / detection area when the approach distance of the indicating means detected by the approach distance detecting means is constant within a predetermined period. Non-touch instruction detecting means for determining that the instruction has been given, and two-dimensional coordinates indicated by the instruction means when the non-touch instruction detecting means determines that the instruction means has instructed the coordinate input / detection area. Non-touch coordinate position calculating means for calculating a position, and an instruction inserted in a coordinate input / detection area detected in accordance with a reception state of a reflecting mirror image in the receiving element. If the approach distance of the step is constant within a predetermined period, it is determined that the pointing means has designated the inside of the coordinate input / detection area, and the two-dimensional coordinate position designated by the pointing means is calculated. Since an operation similar to a non-click operation by a mouse for displaying balloon help or the like can be detected, a more user-friendly user interface can be obtained.

According to the third aspect of the present invention, in the coordinate input / detection device according to the first or second aspect, the transmitting area of the transmitting element is formed on the detection surface by the transmitting element viewed from the receiving element. The height of the pointing means required to detect the contact of the pointing means is set by setting the height of the reflected mirror image to not exceed the height of the coordinate input / detection area viewed from the receiving element. Can be minimized.

According to a fourth aspect of the present invention, in the coordinate input / detection device according to the first or second aspect, the transmitting area of the transmitting element is formed on the detection surface by the transmitting element viewed from the receiving element. By setting the height of the reflected mirror image to be higher than the height of the coordinate input / detection area as viewed from the receiving element, the entire detection surface can be covered. Whichever location is designated, the designated position can be detected without fail. In addition, since the reflecting mirror image is enlarged if it has a concave shape, the pointing position can be accurately detected even when the detection surface is bent and curved by touch pressing by the pointing means.

According to the fifth aspect of the present invention, in the coordinate input / detection device according to the fourth aspect, since a mirror is provided above the transmitting element, a reflection mirror image seen from the receiving element can be reflected by the transmitting element. Since the size is larger than the actual size, an inexpensive small product can be used as the transmitting element, and the space can be saved by reducing the size of the device.

According to a sixth aspect of the present invention, in the coordinate input / detection device according to any one of the first to fifth aspects, a reception restricting means for permitting the receiving element to only receive the reflection mirror image is provided. Since the receiving device can receive only the reflection mirror image, the height of the pointing device can be suppressed to be equal to the height of the reflection mirror image.

According to the seventh aspect of the present invention, in the coordinate input / detection device according to the sixth aspect, the position adjusting means for adjusting the position of the reception restricting means is provided, so that only the reflection mirror image can be reliably obtained at the receiving element. Can be received.

According to an eighth aspect of the present invention, in the coordinate input / detection device according to any one of the first to seventh aspects, the transmitting element and the receiving element are arranged in a horizontal direction of the coordinate input / detection area. A large number of the transmitting elements and the receiving elements are arranged in a matrix by calculating a two-dimensional coordinate position based on a receiving state of the reflection mirror image in each of the receiving elements that are arranged in a pair with the transmitting element in the vertical direction. With the conventional configuration in which the pointing means is spaced apart and opposed, it is possible to eliminate the case where the pointing means does not actually contact the detection surface but merely comes close.

According to a ninth aspect of the present invention, in the coordinate input / detection device according to any one of the first to seventh aspects, the transmitting element is a line light emitting element or a surface light emitting element, and the receiving element is an image pickup element. Since a line light emitter or a surface light emitter is used as a transmitting element by calculating a two-dimensional coordinate position by a triangulation method based on an image forming position in the image sensor, a large number of light emitters are arranged. Since the number of parts can be reduced as compared with the case, the cost of the apparatus can be reduced.

According to the electronic blackboard system of the tenth aspect of the present invention, there is provided a display device having a display surface which is a detection surface for reflecting a detection signal emitted from the transmitting element and displaying characters and images, and The coordinate input / detection device according to any one of claims 1 to 9, wherein the coordinate input / detection region is arranged on the display surface of the display device so as to coincide with the coordinate input / detection region, and based on an input from the coordinate input / detection device. A control device for performing display control of the display device, wherein the display device and the coordinate input / detection device are used to configure a display surface and a writing surface of an electronic blackboard, thereby displaying the coordinate input / detection device. When used by attaching to the display surface of the device, the display surface, which is the detection surface, reflects the detection signal emitted from the transmitting element to form a reflecting mirror image. An electronic blackboard system which is excellent in visibility without a specific surface can be provided at low cost.

According to the eleventh aspect of the present invention, there is provided a writing board having a writing surface which is a detection surface for reflecting a detection signal emitted from the transmitting element and receiving writing of characters and images. The coordinate input / detection device according to claim 1, wherein the coordinate input / detection region is arranged on the writing surface of the writing board so as to match the coordinate input / detection region, and based on an input from the coordinate input / detection device. A control device for controlling information written on the writing board by using the writing board and the coordinate input / detection device to form a writing surface of an electronic blackboard. Is used on the writing surface of the writing board, the detection signal emitted from the transmitting element on the writing surface Shines from forming a reflector image, it is possible to provide a coordinate input surface physical aspects of electronic blackboard system which is excellent in visibility not have, such as (touch surface) in a low cost.

According to the twelfth aspect, according to the first aspect,
In the electronic blackboard system according to 0 or 11, since the display surface of the display device or the writing surface of the writing board is non-planar, the reflected mirror image is projected along the curved surface even if the mirror surface is curved. Even in the case of a projector screen or the like having a concave surface, it is possible to eliminate the case where the indicating means does not actually come into contact with the detection surface but merely comes close to the detection surface. In the case of a concave shape, the image of the reflecting mirror is enlarged and lengthened, so that the height of the transmitting element can be shortened and the manufacturing cost of the system can be reduced.

According to the coordinate position detecting method of the present invention, there is provided an instruction which has a two-dimensional coordinate input / detection area, and designates a detection surface provided in accordance with the coordinate input / detection area. A coordinate position detecting method for detecting a two-dimensional coordinate position of the means, wherein the transmitting element emits a detection signal in the coordinate input / detection area, and a position for receiving a reflection mirror image of the transmitting element formed on the detection surface. A receiving element disposed in the
A touch instruction detecting step of determining that the instruction surface has been instructed by the instruction means when the reception state of the reflection mirror image in the receiving element has become substantially zero, and the instruction means instructing the detection surface. If it is determined that the two-dimensional coordinate position specified by the indicating means, the touch coordinate position calculating step, and, the reflection mirror image formed on the detection surface that reflects the detection signal emitted from the transmitting element When the receiving state becomes substantially zero in the receiving element, it is determined that the detection surface has been instructed by the instructing means, and the two-dimensional coordinate position instructed by the instructing means is calculated. Since the pointing device calculates and uses the coordinates of the position where the pointing device actually touches the detection surface, the pointing device is operated by the pointing device. Actually, since the knowledge surface can be eliminated case only close not in contact, it is possible to detect the coordinate position with high accuracy.

According to the fourteenth aspect, the first aspect is provided.
3. The approach for detecting a coordinate position according to claim 3, wherein the approaching means detects an approaching distance of the pointing means inserted into the coordinate input / detection area in accordance with a receiving state of the reflection mirror image at the receiving element. A non-touch instruction detecting step of determining that the instructing means has instructed the inside of the coordinate input / detection area when the approaching distance is constant within a predetermined period; And a non-touch coordinate position calculating step of calculating a two-dimensional coordinate position instructed by the instructing means when the instructing unit has instructed the coordinate input / detection in accordance with the receiving state of the reflecting mirror image in the receiving element. If the approaching distance of the pointing means inserted into the detection area is constant within a predetermined period, it is determined that the pointing means has instructed the coordinate input / detection area. By calculating the designated two-dimensional coordinate position, it is possible to detect an operation similar to a non-click operation by a mouse for displaying, for example, balloon help, and thus, it is possible to obtain a more user-friendly user interface. .

According to the storage medium of the present invention, there is provided a storage medium having a two-dimensional coordinate input / detection area, and a pointing means for designating a detection surface provided in accordance with the coordinate input / detection area. A coordinate input / detection device for detecting a two-dimensional coordinate position, comprising: a transmitting element that emits a detection signal in the coordinate input / detection region; and a position where a reflecting mirror image of the transmitting element formed on the detection surface is received. A receiving element to be disposed, and a computer-readable program that is used in a coordinate input / detection device provided with the computer and causes the computer to detect a two-dimensional coordinate position of the pointing member that has pointed to the detection surface. A storage medium, wherein the program determines that the detection surface is instructed by the instruction means when the reception state of the reflection mirror image in the reception element becomes substantially zero. Causing the computer to execute a pointing detection function and a touch coordinate position calculating function of calculating a two-dimensional coordinate position specified by the specifying means when the specifying means determines that the detection surface has been specified; When the receiving state of the reflection mirror image formed on the detection surface that reflects the detection signal emitted from the receiving element becomes substantially 0 in the receiving element, it is determined that the detection surface has been instructed by the instruction means,
By calculating the two-dimensional coordinate position instructed by the instructing means, the designated position by the operation of the instructing means (for example, the same operation as a mouse click operation)
Since the coordinates of the position where the pointing means actually touched the detection surface are calculated and used, it is possible to eliminate a case where the pointing means does not actually touch the detection surface and merely comes close to the detection surface, The coordinate position can be detected with high accuracy.

According to the sixteenth aspect of the present invention, the first aspect
6. The storage medium according to claim 5, wherein an approaching distance detecting function for detecting an approaching distance of said indicating means inserted into said coordinate input / detection area in accordance with a reception state of said reflection mirror image in said receiving element, and an approaching of said indicating means. A non-touch instruction detection function for determining that the instruction means has instructed the coordinate input / detection area when the distance is constant within a predetermined period; and the instruction means instructing the coordinate input / detection area. If it is determined that the coordinates have been detected, the computer executes a non-touch coordinate position calculating function of calculating a two-dimensional coordinate position instructed by the instructing means, and the coordinates detected according to the receiving state of the reflecting mirror image in the receiving element. When the approaching distance of the pointing means inserted in the input / detection area is constant within a predetermined period, it is determined that the pointing means has pointed in the coordinate input / detection area, By calculating the two-dimensional coordinate position instructed by the instructing means, it is possible to detect an operation similar to a non-click operation by a mouse for displaying, for example, balloon help, so that a more user-friendly user interface is obtained. be able to.

[Brief description of the drawings]

FIG. 1 is an external perspective view schematically showing an electronic blackboard system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical connection of each unit built in the electronic blackboard system.

FIG. 3 is a block diagram showing an electrical connection of each unit built in the computer.

FIG. 4 is an explanatory diagram schematically showing a configuration of a coordinate input / detection device.

FIG. 5 is a sectional view in the vertical direction.

FIG. 6 is a perspective view showing a state in which a reflecting mirror image of the emitted LED is reflected on the display surface of the PDP.

FIG. 7 is a block diagram showing an electrical connection of each unit of the coordinate input / detection device.

FIG. 8 is an explanatory diagram showing a state in which the instruction means enters a coordinate input / detection area of the coordinate input / detection device.

FIG. 9 is a flowchart schematically showing a flow of a touch coordinate detection process.

FIG. 10 is a flowchart schematically showing a flow of a non-touch coordinate detection process.

FIG. 11 is a vertical sectional view of a coordinate input / detection device according to a second embodiment of the present invention.

FIG. 12 is a graph showing the relationship between the amount of received light and the position of the upper end of the optical mask.

FIG. 13 is a vertical sectional view of a coordinate input / detection device according to a third embodiment of the present invention.

FIG. 14 is an explanatory diagram schematically showing a configuration of a coordinate input / detection device according to a fourth embodiment of the present invention.

FIG. 15 is a block diagram showing an electrical connection of each part of the coordinate input / detection device.

FIG. 16 is a diagram showing a coordinate input / coordinate input / detection device input / output unit;
FIG. 4 is an explanatory diagram illustrating a state of entering a detection area.

FIG. 17 is a front view showing an example in which one point in the coordinate input / detection area of the coordinate input / detection device is pointed out;

FIG. 18 is an enlarged front view showing a part thereof.

FIG. 19 is a front view schematically showing a conventional optical coordinate input / detection device.

FIG. 20 is an explanatory diagram showing a case where a finger indicates a coordinate input / detection area of the coordinate input / detection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic blackboard system 2 Display device 2a Detection surface, display surface 3, 50, 60, 70 Coordinate input / detection device 3a, 70a Coordinate input / detection area 4 Electronic blackboard unit 5 Control device 26, 33, 78 Storage media 27, 61 , 75 Transmitting element 27 ', 64, 65, 75' Reflecting mirror image 29, 71 Receiving element 51, 53, 74 Reception regulating means 62 Mirror P indicating means

Claims (16)

[Claims] 1. A coordinate input / detection device which has a two-dimensional coordinate input / detection area, and detects a two-dimensional coordinate position of a pointing means which designates a detection surface arranged in accordance with the coordinate input / detection area. An apparatus for transmitting a detection signal within the coordinate input / detection area, a receiving element disposed at a position for receiving a reflection mirror image of the transmission element formed on the detection surface, and a receiving element. A touch instruction detecting unit that determines that the detection surface has been instructed by the instruction unit when the reception state of the reflection mirror image in the display device becomes substantially zero; and the instruction unit instructs the detection surface by the touch instruction detection unit. And a touch coordinate position calculating means for calculating a two-dimensional coordinate position instructed by the instructing means when it is determined that the instruction has been made. 2. An approach distance detecting means for detecting an approach distance of the pointing means inserted into the coordinate input / detection area in accordance with a receiving state of the reflection mirror image in the receiving element, and detecting by the approach distance detecting means. A non-touch instruction detecting means for determining that the instruction means has instructed the coordinate input / detection area when the approach distance of the indicated instruction means is constant within a predetermined period; and a non-touch instruction detecting means. 2. The coordinate according to claim 1, further comprising: a non-touch coordinate position calculating unit configured to calculate a two-dimensional coordinate position specified by the specifying unit when the specifying unit determines that the specifying unit has specified the inside of the coordinate input / detection area. Input / detection device. 3. The transmitting area of the transmitting element is such that the height of the reflecting mirror image formed on the detection surface by the transmitting element as viewed from the receiving element is the height of the coordinate input / detecting area as viewed from the receiving element. 3. The coordinate input / detection device according to claim 1, wherein the coordinate input / detection device is set so as not to exceed a height. 4. A transmitting area of the transmitting element, wherein a height of the reflecting mirror image formed on the detection surface by the transmitting element as viewed from the receiving element is equal to a height of the coordinate input / detecting area as viewed from the receiving element. 3. The coordinate input / detection device according to claim 1, wherein the coordinate input / detection device is set to be higher than the height. 5. The coordinate input / detection device according to claim 4, wherein a mirror is provided above said transmitting element. 6. The coordinate input / detection device according to claim 1, further comprising a reception restricting unit that allows the reception element to receive only the reflection mirror image. 7. The coordinate input / detection device according to claim 6, further comprising a position adjusting means for adjusting a position of said reception restricting means. 8. A large number of the transmitting elements and the receiving elements are arranged in the horizontal direction and the vertical direction of the coordinate input / detection area, respectively, and the reflection mirror image of each of the receiving elements forming a pair with each of the transmitting elements. The coordinate input / detection device according to any one of claims 1 to 7, wherein a two-dimensional coordinate position is calculated based on a reception state. 9. The method according to claim 8, wherein the transmitting element is a line light emitter or a surface light emitter, and the receiving element is an image sensor, and a two-dimensional coordinate position is calculated by a triangulation method based on an image forming position in the image sensor. Item 8. The coordinate input / detection device according to any one of Items 1 to 7. 10. A display device having a display surface which is a detection surface for reflecting a detection signal emitted from the transmitting element, and displaying characters and images, and the coordinate input / detection area on the display surface of the display device. A coordinate input / detection device according to any one of claims 1 to 9, wherein the control device performs display control of the display device based on an input from the coordinate input / detection device. And an electronic blackboard system comprising a display surface and a writing surface of the electronic blackboard unit using the display device and the coordinate input / detection device. 11. A writing board which has a writing surface which is a detection surface for reflecting a detection signal emitted from the transmitting element, and receives writing of characters and images, and the coordinate input / writing on the writing surface of the writing board.
The coordinate input / detection device according to any one of claims 1 to 9, which is provided so as to match detection areas, and control of information written on the writing board based on an input from the coordinate input / detection device. An electronic blackboard system comprising a writing device of the electronic blackboard unit using the writing board and the coordinate input / detection device. 12. The writing surface of the display device or the writing surface of the writing board is non-planar.
Electronic blackboard system according to 0 or 11. 13. It has a two-dimensional coordinate input / detection area,
A coordinate position detecting method for detecting a two-dimensional coordinate position of a pointing means for pointing a detection surface disposed in accordance with the coordinate input / detection area, wherein a transmission signal for issuing a detection signal in the coordinate input / detection area is provided. An element, and a receiving element disposed at a position for receiving a reflection mirror image of the transmission element formed on the detection surface, and when a reception state of the reflection mirror image in the reception element becomes substantially zero. A touch instruction detecting step of determining that the detection surface has been instructed by the instruction unit, and when it is determined that the instruction unit has instructed the detection surface,
A touch coordinate position calculating step of calculating a two-dimensional coordinate position instructed by the instructing means. 14. An approach distance detecting step of detecting an approach distance of the pointing means inserted into the coordinate input / detection area in accordance with a reception state of the reflection mirror image in the receiving element; A non-touch instruction detecting step of determining that the instructing means has instructed the inside of the coordinate input / detection area when the instruction is constant within a predetermined period; and that the instructing means instructs the inside of the coordinate input / detection area. 14. The coordinate position detecting method according to claim 13, further comprising a non-touch coordinate position calculating step of calculating a two-dimensional coordinate position instructed by the instructing means when the judgment is made. 15. It has a two-dimensional coordinate input / detection area,
A coordinate input / detection device for detecting a two-dimensional coordinate position of a pointing means for designating a detection surface arranged in accordance with the coordinate input / detection area, and issues a detection signal in the coordinate input / detection area. The instruction which is used in a coordinate input / detection device provided with a transmitting element and a receiving element disposed on a position for receiving a reflection mirror image of the transmitting element formed on the detection surface, and which indicates the detection surface. A storage medium storing a computer-readable program that causes a computer to execute detection of a two-dimensional coordinate position of a member, wherein the reception state of the reflection mirror image in the receiving element is substantially zero. A touch instruction detecting function for determining that the detection surface has been instructed by the instruction unit in the case; and when it is determined that the instruction unit has instructed the detection surface,
A storage medium for causing the computer to execute a touch coordinate position calculating function of calculating a two-dimensional coordinate position instructed by the instructing means. 16. An approach distance detecting function for detecting an approach distance of the pointing means inserted into the coordinate input / detection area in accordance with a reception state of the reflection mirror image in the receiving element; A non-touch instruction detecting function for determining that the instructing means has instructed the inside of the coordinate input / detection area when it is constant within a predetermined period; and that the instructing means instructs the inside of the coordinate input / detection area. 16. The storage medium according to claim 15, wherein when it is determined, the computer executes a non-touch coordinate position calculating function of calculating a two-dimensional coordinate position instructed by the instructing means.