JP2001014104A - Information input/detection/display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the fatigue of the eyes of a user by making the surface of the part to be in the visual angle of the user of an outer frame part non- glossy. SOLUTION: A coordinate input/detection/display unit 40 is composed of plural light emitting/receiving means and detects the two-dimensional coordinates of the plane or near plane of a light interrupting means by the presence/absence of the light interrupting means inside the optical path of the emitted/received light. The unit 40 is composed of an image input means for fetching the coordinate input/detection area of the plane or near plane and converts the area of a part of information fetched by the image input means to two-dimensional coordinate information. For the unit 40, the surface of the outer frame part 40B of the display surface 40A is made non-glossy and thus, reflected light from the part does not enter the eyes of the user and the fatigue of the eyes of the user is reduced.

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, and more particularly, to a personal computer or the like.
The present invention relates to a so-called touch panel type coordinate input / detection device that detects a coordinate position specified by a pointing member such as a pen, a finger, or the like in order to input or select information. This coordinate input / detection device is used as an information input / detection / display device integrated with an electronic blackboard and a large display.

[0002]

2. Description of the Related Art Conventionally, as a coordinate detecting device, there is an apparatus which detects an electric change by electrostatic or electromagnetic induction when a coordinate input surface is pressed by a pen or when the pen approaches a coordinate input surface. . Another method is disclosed in
There is an ultrasonic touch panel coordinate detecting device as disclosed in Japanese Patent Application Laid-Open No. 1-239322. In simple terms, the surface acoustic wave transmitted onto the panel is touched to the panel to attenuate the surface acoustic wave and its position is detected.

[0003]

However, in the method of detecting a coordinate position by electrostatic or electromagnetic induction, since the coordinate input surface has an electric switch function, the manufacturing cost is high, and the pen and the main body are connected. Since a connecting cable was required, there was a difficulty in operability. In addition, since the ultrasonic method is based on the premise of finger input, when a pen input is performed with a material that absorbs on the panel (soft and elastic) and a straight line is drawn, it is stable when pressed. But there is not enough contact when moving the pen,
The straight line breaks. So, to get enough contact,
The pen is pressed with excessive force. Then, with the movement of the pen, a stress is received due to the elasticity of the pen to generate a strain, and a force for returning during the movement is exerted. Therefore, once an attempt is made to draw a curve at the time of pen input, the force for holding down the pen is weakened, and the force for restoring distortion is excellent, so that it is not possible to obtain a stable attenuation and it is determined that the input has been interrupted. For this reason, there is a problem that reliability cannot be ensured as pen input.

[0004] However, regarding the problems of the prior art as described above, the present applicant has previously filed Japanese Patent Application No. 10-12.
No. 7035 and Japanese Patent Application Laid-Open
No. 99, Japanese Unexamined Patent Publication No.
-319501, and further, an optical coordinate detection device represented by the applicant of the present invention as Japanese Patent Application No. 10-230960,
Alternatively, the problem is solved by a coordinate detection device using image input means, and a touch panel type coordinate detection device can be realized with a relatively simple configuration.

In recent years, with the spread of personal computers and the like, such a coordinate detection device has been positioned as a powerful tool for inputting and selecting information, and has been studied diligently in addition to those disclosed in the above publications. However, there are many issues that need to be solved for full-scale practical application.

One of the problems is such an optical coordinate input and detection device, or a coordinate input using image input means such as a camera, and an information input / detection / display device combining a detection device and a display means. However, when information is visually obtained from the display surface, there is a problem that unnecessary information comes into view from a portion other than the display surface, causing eyestrain.

The object of the present invention is to provide such an optical coordinate input / detection device, or information input / detection combining a coordinate input / detection device using image input means such as a camera and display means. The first and second inventions reduce the eye fatigue of a user using such a device, and the third invention relates to the first and second inventions. The fourth invention has been made for the purpose of proposing a specific configuration for realizing the invention, and for making a further proposal.

[0008]

The invention according to claim 1 comprises a plurality of light-emitting means and a plurality of light-receiving means, and the presence or absence of the light-blocking means in the light path for light emission / reception depends on the presence of the light-blocking means. A coordinate input / detection device for detecting a two-dimensional coordinate of a plane or a substantially plane, or image input means for capturing a coordinate input / detection area of a plane or a substantially plane,
A coordinate input / detection device comprising means for converting a part of the information taken in by the image input means into two-dimensional coordinate information;
An information input / detection / display device combining a coordinate input / detection surface of the coordinate input / detection device and a display surface of the display device, the display device displaying information at a predetermined position based on the detected coordinates. The outer surface of the display device has a non-glossy surface property at a portion of the display surface outside the frame which is within the viewing angle of the user.

According to a second aspect of the present invention, there are provided a plurality of light emitting means and a plurality of light receiving means. Coordinate input / detection device for detecting dimensional coordinates,
Alternatively, the coordinates include image input means for capturing a plane or substantially plane coordinate input / detection area, and means for converting a part of the information captured by the image input means into two-dimensional coordinate information. An input / detection device;
A display device for displaying information at a predetermined position based on the coordinates input / detected by the coordinate input / detection device is combined with a coordinate input / detection surface of the coordinate input / detection device and a display surface of the display device. In the information input / detection / display device, the information input / detection / display device includes an information input / detection / display device.
It is composed of a detection / display device unit, a holding member for holding the unit, a control unit for processing the coordinate information and the like, and the surface properties of a portion of the holding member that enters the user's viewing angle are non-glossy. It was made.

According to a third aspect of the present invention, in the information input / detection / display device according to any one of the first and second aspects, the non-glossy property is obtained by making the surface non-mirror. It was made. According to a fourth aspect of the present invention, in the information input / detection / display device according to any one of the first to third aspects, a color of a portion entering the viewing angle of the user is a non-white color.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the principle of a first example of an optical coordinate input / detection device to which the present invention is applied will be described. FIG. 1 is a diagram showing an example of an optical coordinate input / detection device to which the present invention is applied. Coordinate input area 3
Has a square shape, and may be a display surface for electronically displaying an image or a whiteboard written with a pen such as a marker. It is assumed that the user touches the coordinate input area 3 with pointing means such as a finger, a pen, and a pointing stick made of an optically opaque material. It is an object of such an optical coordinate input device to detect the coordinate 2 of the pointing means at this time.

Light receiving and emitting means 1 are provided at both upper ends of the coordinate input area 3.
Is installed. A bundle of light beams L1, L2,... Ln (probe light) is emitted from the light emitting / receiving means 1 toward the coordinate input area. Actually, it is a fan-shaped plate-like light wave traveling along a plane parallel to the coordinate input plane spread from the point light source 81. A retroreflective member 4 is attached to the periphery of the coordinate input area 3 with the retroreflective surface facing the center of the coordinate input area 3.

The retroreflective member 4 is a member having a characteristic of reflecting incident light in the same direction regardless of the incident angle. For example, when focusing on one beam L12 among the fan-shaped plate-like light waves emitted from the light emitting / receiving means 1, the beam L1
Numeral 2 is reflected by the retroreflecting member 4 and travels back to the light receiving / emitting means 1 along the same optical path as the retroreflected light L11 again. The light receiving / emitting means 1 is provided with a light receiving means, which will be described later, and can determine whether or not the returning light has returned to the light receiving / emitting means for each of the probe lights L1 to Ln.

Now, consider the case where the user touches position 2 with his hand. At this time, the probe light L10 is blocked by the hand at the position 2 and does not reach the retroreflective member 4. Therefore, by detecting that the return light of the probe light L10 does not reach the light receiving / emitting means 1 and that the return light corresponding to the probe light L10 is not received, an instruction is given on the extension line (straight line L) of the probe light L10. It is possible to detect that an object has been inserted. Similarly, the light receiving and emitting means 1 installed at the upper right of FIG.
By irradiating the probe light from and detecting that the return light corresponding to the probe light L13 is not received,
It is possible to detect that the pointing object has been inserted on the extension line (straight line R) of the probe light L13. If the straight line L and the straight line R can be obtained, the coordinates 2 at which the indicating means is inserted can be obtained by calculating the intersection coordinates by calculation.

Next, the structure of the light receiving / emitting means 1 and the probe light L
A mechanism for detecting which of the probe lights 1 to Ln has been blocked will be described. FIG. 2 schematically shows the internal structure of the light receiving / emitting means 1. FIG. 2 is a diagram of the light emitting / receiving unit 1 attached to the coordinate input surface of FIG. 1 when viewed from a direction perpendicular to the coordinate input surface 3. Here, for simplicity, the description will be made on a two-dimensional plane parallel to the coordinate input surface 3. The schematic configuration of the light receiving / emitting means 1 includes a point light source 81, a condenser lens 51, and a light receiving element 50. The point light source 81 emits light in a fan shape in a direction opposite to the light receiving element 50 when viewed from the light source. The fan-shaped light emitted from the point light source 81 is indicated by arrows 53 and 5.
8. It is considered to be a set of beams traveling in other directions. The beam that has traveled in the 53 direction is reflected by the retroreflective member 4 to become reflected light 54, passes through the condenser lens 51, and reaches a position 57 on the light receiving element 50. In addition, the traveling direction 5
The beam traveling along 8 is reflected by the retroreflective member 4 to become reflected light 59,
Reach 6. Thus, the light emitted from the point light source 81, reflected by the retroreflective member 4, and returned on the same path is
Each of the light receiving elements 50
Reach different locations on the top. Therefore, when the pointing means is inserted at a certain position and a certain beam is cut off, the light does not reach the point on the light receiving element 50 corresponding to the beam. Therefore, by examining the distribution of the light intensity on the light receiving element 50, it is possible to know which beam is blocked.

The above operation will be described in detail with reference to FIG. In FIG. 3, it is assumed that the light receiving element 50 is installed on the focal plane of the condenser lens 51. Light emitted from the point light source 81 toward the right side in FIG. 3 is reflected by the retroreflective member 4 and returns along the same path. Therefore, the light is condensed again at the position of the point light source 81.
The center of the condenser lens 51 is installed so as to coincide with the position of the point light source. The return light returning from the retroreflective member 4 passes through the center of the condenser lens 51, and thus travels in a symmetrical path behind the lens (light receiving element side).

At this time, the light intensity distribution on the light receiving element 50 is considered. If the indicating means is not inserted at the position shown in FIG. 2, the light intensity distribution on the light receiving element 50 is almost constant,
As shown in FIG. 3, when the indicator for blocking light is inserted at the position 2, the beam passing therethrough is blocked, and the light receiving element 5 is blocked.
On 0, an area where the light intensity is weak occurs at the position of the position Dn (dark spot). This position Dn corresponds to the emission / incidence angle θn of the shielded beam, and θn can be known by detecting Dn. That is, θn can be expressed as θn = arctan (Dn / f) (1) as a function of Dn. Here, in particular, θn in the light receiving / emitting means 1 at the upper left of FIG. 1 is replaced with θnL, and Dn is replaced with DnL.

Further, in FIG. 4, the angle .theta.L between the position 2 of the pointing means and the coordinate input means 3 is obtained by the conversion g of the geometric relative positional relationship between the light receiving / emitting means 1 and the coordinate input area 3.
Is a function of DnL obtained by Expression (1), and θL = g (θnL) Expression (2) where θnL = arctan (DnL / f).

Similarly, for the light receiving / emitting means 1 at the upper right of FIG. 1, the L symbol in the above equation is replaced with an R symbol, and the geometrical relationship between the right light receiving / emitting means 1 and the coordinate input area 3 is obtained. By the conversion h of the relative positional relationship, θR = h (θnR) Expression (3) where θnR = arctan (DnR / f).

If the mounting interval of the light receiving and emitting means on the coordinate input area 3 is w shown in FIG. 4 and the origin and the coordinates are as shown in FIG. The coordinates (x, y) of the point 2 are as follows: x = w tan θR / (tan θL + tan θR) Expression (4) y = w tan θL · tan θR / (tan θL + tan θR) Expression (5) Thus, x and y can be represented as functions of DnL and DnR. That is, the left and right light emitting / receiving means 1
By detecting the positions DnL and DnR of the dark spots on the upper light receiving element 50 and considering the geometrical arrangement of the light receiving and emitting means,
The coordinates of the point 2 designated by the designation means can be detected.

Next, an embodiment will be described in which the optical system described above is installed in a coordinate input area, for example, on the surface of a display. FIG. 5 shows the left and right light emitting / receiving means 1 described with reference to FIGS.
This is an embodiment in which one of them is installed on the surface of the display 3. 3 in FIG. 5 shows a cross section of the display surface when viewed in the direction from the negative to the positive y-axis shown in FIG. FIGS. 5A and 5B are views in which the viewpoint is changed as shown in the figure for the sake of explanation. The light emitting means among the light receiving and emitting means will be described. As the light source 83, a light source such as a laser diode or a pinpoint LED that can narrow the spot to some extent is used. Light source 8
Light emitted perpendicularly from 3 to the display surface 3 is collimated by the cylindrical lens 84 only in the x direction. This is because the collimator is turned back by the half mirror 87 and then distributed as parallel light in a direction perpendicular to the display surface. After exiting the cylindrical lens 84, the two cylindrical lenses 85 and 86 whose curvature distribution is orthogonal to the cylindrical lens 84 are used as y in FIG.
Light is collected in the direction. Part A in FIG. 5 illustrates the arrangement of the cylindrical lens groups and the state of condensing the light flux when the viewpoint is rotated about the z-axis and viewed from the x direction in order to explain this situation.

By the action of the cylindrical lens group, a linearly focused area is formed behind the cylindrical lens 86. Here, a slit 82 narrow in the y direction and elongated in the x direction is inserted. That is, the linear secondary light source 81 is formed at the slit position. The light emitted from the secondary light source 81 is folded back by the half mirror 87, and the display surface 3
Is parallel light without spreading in the vertical direction, and travels along the display surface 3 while spreading in a fan shape around the secondary light source 81 in the direction parallel to the display surface 3. The light that has traveled is reflected by the retroreflective member 4 provided at the peripheral edge of the display, and returns to the half mirror 87 (arrow C) along a similar path. The light transmitted through the half mirror 87 travels parallel to the display surface 3, passes through the cylindrical lens 51, and enters the light receiving element 50.

At this time, the secondary light source 81 and the cylindrical lens 51 have a conjugate positional relationship with respect to the half mirror 87 (D in FIG. 5). Accordingly, the secondary light source 81 corresponds to the light source 81 in FIG. 3, and the cylindrical lens 51 corresponds to the lens 51 in FIG. 5 shows the cylindrical lens and the light receiving element on the light receiving side viewed from the z-axis direction while changing the viewpoint. The lens 51 and the light receiving element 50 shown in FIG.
Corresponding to

Next, the principle of a second example of an optical coordinate input / detection device to which the present invention is applied will be described. FIG. 6 shows a typical optical coordinate input device. As shown in FIG. 6, for example, light emitting diodes (LEDs) 11 arranged Xm in the horizontal direction and opposed to each other in a one-to-one correspondence. Xm of, for example, phototransistors 12
And Yn LEDs 13 arranged in the vertical direction, and Yn phototransistors 14 opposed to each other in a one-to-one manner to form a coordinate detection area 3. Then, when a touch input is performed on, for example, the touch portion 15 in the coordinate detection area 3, the light path passing through the touch portion 15 is blocked, so that the amount of light received by the phototransistors 12 and 14 in the cut light path decreases. Therefore, the positions of the phototransistors 12 and 14 in which the amount of received light has decreased are averaged to calculate the position 16 of the touch coordinates.

Next, the principle of a third example of an optical coordinate input / detection device to which the present invention is applied will be described.
FIG. 7 is a configuration diagram of a third example of the optical coordinate detection device. Here, two adjacent corners (k1, k2) of the coordinate input surface 3, which is a quadrangular flat plate, are placed
1 and 22 are fixedly installed. Light is emitted from the two light emission detection devices 21 and 22 onto the coordinate input surface 3. On the other hand, the user points to an arbitrary position on the coordinate input surface 3 with the position pointing stick, that is, the pen 24.

At this time, the light emission detecting devices 21 and 22 are connected to the pen 24 of the light emitted from the light emission detecting devices 21 and 22.
The light which is reflected by and returns to the light emission detection devices 21 and 22 is detected, and the position coordinates of the pen 24 are calculated. The light emission detecting devices 21 and 22 have the same configuration, and include light emitting units 21A and 22A and light receiving angle detecting units 21B and 22B.
It is composed of Here, the light emission detection devices 21 and 22
Is installed with respect to the coordinate input surface 3 so that the light emitting optical axis of the light emitted from the light emitting unit and the light receiving optical axis of the light receiving angle detecting unit both face the reference point 23 of the coordinate input surface. You.
The light emission detecting device corresponds to the light emission / detection unit described above, the light emitting unit corresponds to the light emitting unit, and the light receiving angle detection unit corresponds to the angle detection unit.

In FIG. 7, the direction of a line segment a1 connecting the angle k1 of the coordinate input surface 3 and the reference point 23 and the direction of a line segment a2 connecting the angle k2 of the coordinate input surface and the reference point 23 are determined by the light emission detecting devices 21 and 21.
Two light-emitting optical axes and light-receiving optical axes. Here, the line segments a1 and a2 are directions in which the angle of the coordinate input surface 3 is bisected into 45 °. The angle k2 of the coordinate input surface 3 is defined as the origin (0, 0), and the position on the coordinate input surface 3 is defined as Y in the horizontal direction.
The axis and the vertical direction are represented by an XY coordinate system with the X axis.

FIG. 8 is a conceptual diagram showing the configuration of one embodiment of the light emission detecting devices 21 and 22. Here, the light emitting units 21A and 22A of the light emission detecting device are light sources (LED) 5 (5A, 5A).
B) and an optical lens 6 (6A, 6B).
The optical lens 6 is a cylindrical lens that changes only the magnification in one direction of the image, or a toroidal that changes only the magnification in one direction of the image and does not change the magnification due to the incident angle. Use a lens. In addition, the light receiving angle detecting units 21B and 22B of the light emission detecting device
Is the PSD 7 (7A, 7B) and the cylindrical lens 8
(8A, 8B).

The light emitted from the LED 5 (5A, 5B) is transmitted to an optical lens 6 (6A, 6B) disposed immediately before the light.
Thereby, the light is condensed so as to become a beam parallel to the coordinate input surface 3. That is, as shown in FIG. 12, light in a direction perpendicular to the coordinate input surface 3 is condensed by the optical lens 6 (6A, 6B) so as to be parallel to the coordinate input surface 3, and further,
A fan-shaped beam parallel to the coordinate input surface 3 is formed. As described above, when the light is condensed into a fan-shaped beam, the light can be used more effectively than when the light is not condensed, so that the reliability of position detection can be improved. Here, LED5 (5A,
5B) may emit visible light,
L2656 (manufactured by Hamamatsu Photonics) that emits infrared light (wavelength 890 nm) is used. The optical lens 6 (6A, 6B) has a length of 10 mm in a direction perpendicular to the coordinate input surface 3 and a length of 10 mm in a direction parallel to the coordinate input surface 3 and perpendicular to the emission optical axis of the infrared light. The size is about 6 mm and the focal length is about 6 mm. Furthermore, the LED 5 (5A, 5B) is fixedly arranged so that the light emitting point of the LED 5 (5A, 5B) comes to the focal position of the optical lens.

As shown in FIG. 8, the cylindrical lenses 8 (8A, 8B) constituting the light-receiving angle detectors 21B, 22B condense the reflected light from the pen 24 in a direction parallel to the coordinate input surface 3. Are arranged as follows. Then, the focused spot light is received by the PSD 7 (7A, 7B). P
As shown in FIG. 8, the SD 7 (7A, 7B) has an elongated structure in a direction parallel to the coordinate input surface 3, and the light receiving surface is a PN junction surface for converting incident light into an electric signal.

The PSD 7 (7A, 7B) has a light receiving surface.
Output terminals (S₁,
S_Two) Is provided, and the light receiving point S₀And the distance to the output terminal
Proportional current (I₁, I_Two) Is output from this output terminal.
It is. This current (I₁, I_Two) Is A / D converted to micro
The light receiving point S is calculated by a computer.
₀Of the light reflected from the pen 24 can be specified.
The light receiving angle can be calculated. Perform this operation
The control circuit will be described later. PSD7 (7A, 7B)
The length of the light receiving surface in the direction parallel to the coordinate input surface 3 is
13 mm, the length in the direction perpendicular to the coordinate input surface 3 is about 1 mm
What is necessary is just to use. For example, Hamamatsu Photonics
S3270 can be used.

FIG. 10 shows a cylindrical lens 8 (8
A, 8B) and a specific arrangement example of PSDs 7 (7A, 7B). Here, the cylindrical lens 8 has a length of 10 m in a direction parallel to the coordinate input surface 3 and the light receiving surface of the PSD 7.
m, the length in the direction perpendicular to the coordinate input surface 3 is about 10 mm, and the distance between the optical center position of the cylindrical lens 8 and the light receiving surface of the PSD 7 is 6.5 mm. Also, the reflected light from the pen 24 is directly
A mask (shown by oblique lines) 9 made of a material such as black ABS is arranged around the cylindrical lens 8 so as not to enter the light receiving surface of D7.

Further, the focal length of the cylindrical lens 8 changes because the distance between the lens and the PSD 7 changes due to the difference in the incident angle of the reflected light from the pen 24.
May be between the maximum value max and the minimum value min of the distance between the center of the pixel 7 and the light receiving surface of the PSD 7. For example, in the case of FIG. 10, since max = 9.2 mm and min 6.5 mm, a cylindrical lens 8 having a focal length of about 9 mm may be used. Note that the coordinate input surface 3 of the mask 9 described above is used.
Is the length of the light receiving surface of the PSD 7 (= 1
3 mm), for example, in the case of FIG. 10, it may be about 15 mm.

In the embodiment shown in FIG. 8, the configuration in which the cylindrical lens 8 is used to focus the reflected light from the pen 24 to the spot light is shown. However, the present invention is not limited to this, and is shown in FIG. As shown, the cylindrical lens 8
Instead of this, an aperture 10 having one minute transmission hole 10A may be used. FIG. 9 shows a conceptual diagram of the configuration of the light emission detecting means 21 and 22 using the aperture 10.
In the case of this embodiment, of the reflected light from the pen 24,
Only light that has passed through the transmission hole 10A is PS
Is received by the light receiving point S ₀ of D7. As the aperture 10, a thin plate made of a material such as black ABS may be used.

FIG. 11 shows a specific arrangement example of the aperture 10 and the PSD 7. Here, as in FIG.
Assuming that the length of the light receiving surface of D7 is 13 mm, the aperture 10 is arranged at a position which is half the distance from the light receiving surface of PSD7 by 6.5 mm so that the light receiving surface of PSD7 is parallel to the surface of the aperture. I do. The size of the aperture 10 is such that the reflected light from the pen 24 is PSD
7 is preferably larger than the light receiving surface of the PSD 7 so as not to directly enter the light receiving surface of the PSD 7. For example, for the size of the light receiving surface of the PSD of 13 mm × 1 mm, the aperture 1
The size of 0 can be about 15 mm × 3 mm. In the direction parallel to the coordinate input surface 3, the transmission hole 10A
The length of the light receiving surface of the PSD 7 (1 m) is shorter than the length of the light receiving surface of the SD 7 (13 mm) and in the direction perpendicular to the coordinate input surface 3.
m). For example, as shown in FIG.
The size can be 2 mm × 2 mm.

FIGS. 8 and 9 show conceptual diagrams of the light emission detecting device. The components (the light source LED 5, the optical lens 6, the PSD 7, the cylindrical lens 8 or the aperture 10) are arranged as described above. And may be integrally molded into one housing. However, the light emitting unit (LED 5, optical lens 6) and the light receiving angle detecting unit (PSD 7, cylindrical lens 8 or aperture 10) are arranged as close as possible to each other so as not to interfere with light emission and light reception. It is necessary to arrange the emitted light optical axis of the infrared light and the light receiving optical axis of the infrared light received by the cylindrical lens 8 or the aperture 10 in the same direction.

The size of the light emission detecting device can be reduced to about 20 mm × 15 mm × 10 mm by being integrally molded, so that the size can be reduced as compared with the case where the position is detected by scanning the light beam using a rotary motor. It is.

FIG. 13 shows the LEDs 5 (5A, 5B) and P
FIG. 3 is a block diagram showing a configuration of a control circuit of SD7 (7A, 7B). The control circuit LED 5 (5A, 5B) and a control of emission timing of, and performs calculation of PSD 7 (7A, 7B) current output from (I _1, I _2). As shown in the figure, the control circuit mainly includes an MPU 37, a ROM 35 for storing programs and data, a RAM 36,
A timer 38 for controlling the light emission time interval, an interface driver 39, A / D converters 33A and 33B, and LED drivers 34A and 34B are connected by a bus. As circuits for calculating the currents (I ₁ , I ₂ ) output from the PSDs 7A, 7B, amplifiers 31A, 31B analog arithmetic circuits 32A, 32B are connected to the output terminals (S ₁ , S ₂ ) of the PSD as shown in the figure. Is done. PSD7
The currents (I ₁ , I ₂ ) output from A, 7B are
1A and 31B are input and amplified. Then, the amplified current signal is converted to I _{2 by the} analog operation circuits 32A and 32B.
A process such as / (I ₁ + I ₂ ) is performed, and further converted into digital signals by the A / D converters 33A and 33B and passed to the MPU 37. After that, the MPU 37 calculates the light receiving angle and the position coordinates of the pen.

This control circuit may be incorporated in the same housing as one of the light emission detecting devices, or may be incorporated in a part of the coordinate input surface 3 as a separate housing. It is preferable to provide an output terminal for outputting the calculated coordinate data to a personal computer or the like via the interface driver 39.

Next, FIG. 14 shows an embodiment of the shape of the tip of the pen 24 which is a position indicating rod used in the present invention.
The pen 24 has a shape similar to a so-called writing instrument, and has a structure (retroreflective portion) that reflects light at its tip 24A, that is, a region 24A through which light emitted from the light emission detection devices 21 and 22 passes. 25. In particular, this “structure for reflecting light” 25 includes the light emission detecting devices 21 and 22.
It is a recursive structure that reflects in the same direction as the incident direction of the light emitted from.

FIG. 14 shows, as an example of the structure, a shape in which the tip of the pen 24 is composed of a number of corner cubes. As shown in FIG. 15, the corner cube is a combination of three plane mirrors that are perpendicular to each other. In general, a portion surrounded by a thick line in a figure obtained by cutting one corner from a glass cube is used as the corner cube 25. In the corner cube 25 configured as described above, after the incident light is reflected once on each of the three surfaces, the reflected light accurately returns to the direction of the incident light.

For example, a corner cube 25 having a side length c of 2 mm is radially arranged at the tip of a pen having a diameter of 10 mm. Further, as shown in FIG. 14, when the corner cubes adjacent to each other are arranged in the opposite direction, it is possible to form 62 corner cubes per stage.
In the case of a three-stage configuration as in the above, a total of 186 corner cubes can be configured. Although a structure using a corner cube as a structure in which reflected light returns in the direction of incident light has been described, other structures may be used as long as the structure has a recursive property in which reflected light returns in the direction of incident light. Good.

Next, the principle of detecting the pointing position of the pen in the coordinate detecting device of the present invention will be described. here,
As shown in FIG. 7, the case where two light emission detection devices are used will be described. However, the same pen pointing position can be detected by using three or more light emission detection devices. First, FIG.
It is assumed that an appropriate position (X, Y) is designated on the coordinate input surface 3 using the pen 24 shown in FIG. At this time, of the infrared light emitted from the LED 5A of the light emitting unit 21A of the light emission detecting device 21, the light emitted in the direction of the line segment p1 is the pen 2
The reflected light travels on the same line segment p1 in the reverse direction, and is received by the PSD 7A of the light-receiving angle detection unit 21B. Similarly, out of the infrared light emitted from the LED 5A of the light emitting unit 22A of the light emission detection device 22, the light emitted in the direction of the line segment p2 hits the pen 24, and the reflected light travels in reverse on the same line segment p2,
The light is received by the PSD 7B of the light receiving angle detection unit 22B. PS
The light received by D7B is, as shown in FIG.
Spot light is formed at different positions on the light receiving surface of the PSD depending on the incident angle with respect to D7B. Here, the line segment p2
Is θ from the line segment a2 bisecting the angle k2 of the coordinate input surface 3.
2, and the line segment p1 forms an angle of θ1 from the line segment a1 that bisects the angle k1 of the coordinate input surface 3.

FIGS. 16A and 16B show a specific example of the positional relationship between the coordinate input surface 3 and the cylindrical lens 8A and the PSD 7A forming the light receiving angle detecting means 21B. Here, the light receiving surface of PSD 7A is the coordinate input surface 3
It is perpendicular to a line segment a1 forming an angle of 45 ° with the side. That is, a line segment a1 connecting the center of the cylindrical lens 8A and the center of the light receiving surface of the PSD 7A coincides with the light receiving optical axis and the light emitting optical axis. Also, let L be the distance between the center of the cylindrical lens 8A and the center of the light receiving surface of the PSD 7A,
The length of the light receiving surface of A is 2L.

Now, it is assumed that the reflected light from the pen 24 passes through the line segment p1 and is received at a position D1 away from the central position of the PSD 7A. In addition, 2 of the light receiving surface of PSD7A
The current values obtained from the two output terminals are defined as I ₁ and I ₂ . At this time, the following relationship is established between the current and the light receiving position of the PSD. I ₁ = I ₀ × (L−D 1) / ₂ L I ₂ = I ₀ × (L + D 1) / 2 L I ₀ = I ₁ + I ₂ (I ₀ : all currents) Therefore, L + D 1 = ₂ L × I ₂ / (I ₁ + I ₂ ).

That is, the light receiving position D1 of the reflected light is PS
D7A is obtained from the current values I ₁ and I ₂ obtained by D7A.
Calculated by 2A. By the way, according to FIG. 16B, the relationship of D1 / L = tan θ1 holds,
The incident angle θ1 of the reflected light is obtained from the following equation. θ1 = tan ⁻¹ (D1 / L)

Similarly, the other light emission detecting device 22
Also, assuming that the distance from the center of the PSD to the light receiving position is D2,
The incident angle θ2 of the reflected light is obtained. θ2 = tan ⁻¹ (D2 / L) Further, since the indicated position (X, Y) of the pen 24 is the intersection of the line segments a1 and a2 formed by the incident angles θ1 and θ2 of the two reflected lights, , Θ1, θ2 from the indicated position (X,
Y) is required. Y = Xtan (45 ° −θ2) Y = (AX) tan (45 ° −θ1) Here, A is the horizontal length of the coordinate input surface 3 as shown in FIG.

By solving the above simultaneous equations, the position coordinates X and Y on the coordinate input surface 3 specified by the pen 24 are obtained. Since (θ1, θ2) and (X, Y) are formalized, if these formulas are programmed and incorporated in the ROM, they can be easily obtained by the calculation of the MPU 37. Further, the (X, Y) coordinate value as the calculation result is transferred to a personal computer or the like via the interface driver 39, and can be used for processing such as displaying the position indicated by the pen and inputting a command corresponding to the indicated position.

In the above embodiment, an example in which two light emission detection devices are used has been described. However, if the LEDs of both devices emit light at the same time, mutual infrared light may be detected by the PSD in the other device. So, LED5 by LED driver 34
The light emission control of (5A, 5B) is performed alternately in a time-sharing manner,
It is preferable to detect the current of PSD 7 (7A, 7B) in synchronization with this. For example, with one LED emitting light and the other LED turned off, one LED
, And after 10 msec, the current of the PSD corresponding to the other LED can be detected while one LED is turned off and the other LED emits light. That is, 10 mse
What is necessary is just to make one of two LEDs emit light alternately for every c. This control is performed by the MPU 37 using the timer 38. By performing the time-sharing control of the LED emission in this manner, erroneous detection of infrared light is also eliminated, and the pen 24
The position can be detected by sufficiently following the movement of.

The coordinate input surface 3 only needs to be a planar shape that can indicate a position with a pen, and is not particularly limited to the square shape as shown in the embodiment of FIG. 7, but may be another shape. Absent. Further, in the above-described embodiment, it is assumed that a plane plate is used as the coordinate input surface 3, but the present invention is not limited to this, and a display device, for example, a CR
A display screen of T or LCD may be used. CRT and LCD
In order to eliminate the effect of display light being incident on the PSD 7 and being erroneously detected, it is preferable to use the infrared light emitting LED described above.
It is preferable to use one that can detect the peak emission wavelength of D. Further, in order to prevent infrared rays generated from the CRT or the LCD from affecting the coordinate detection, it is preferable to arrange an infrared cut filter made of a PVC resin or the like on the display screen.

Next, as a fourth example of an optical coordinate input / detection device to which the present invention is applied, the principle of a coordinate detection device using image input means will be described. FIG.
FIG. 1 is a block diagram showing a configuration of such a coordinate input / detection device. Reference numeral 60 denotes an infrared position detecting unit, and 61 and 62 denote two infrared CCD cameras arranged in the infrared position detecting unit 60, which are arranged at an interval of a distance L in the horizontal direction. 67 is an infrared LED, 68 is an infrared LED 67
This is a pen-shaped coordinate input unit in which an infrared LED 67 is disposed at the tip of the pen-shaped coordinate input device so as to radiate infrared rays upward.

Reference numeral 70 denotes a control unit; 63, a reset signal generated by the control unit 70 and input to the infrared CCD cameras 61, 62 of the infrared position detection unit 60;
Numeral 64 denotes an infrared CC generated by the control unit 70.
A vertical clock signal 65 input to the D cameras 61 and 62 for vertical scanning, and 65 is a horizontal clock signal generated by the control unit 70 and input to the infrared CCDs 61 and 62 for horizontal scanning. The infrared CCD cameras 61 and 62
Starts scanning in the X-Y direction in response to the input of the reset signal 63, the vertical clock signal 64, and the horizontal clock signal 65.

66A and 66B are infrared CCD cameras 6
1 and 62. Reference numeral 71 denotes a reset signal circuit for generating a reset signal 63; 72, a vertical clock circuit for generating a vertical clock signal 64; and 73, a horizontal clock circuit for generating a horizontal clock signal 65. 74A and 74B are peak detection circuits that detect the peak of the waveform based on the video signals 66A and 66B and generate a peak signal in accordance with the cycle of the horizontal clock signal 65.
75A and 75B are peak detection circuits 74A and 74B.
5 is a peak detection signal obtained from.

Reference numeral 76 denotes an arithmetic circuit for calculating a coordinate position.
An interface circuit 7 transmits the coordinate position calculated by the arithmetic circuit 76 to a computer (not shown). Reference numeral 78 denotes a display circuit for displaying the coordinate position calculated by the arithmetic circuit 76. Although not shown, when the pen-shaped coordinate input unit 68 is located outside the imaging range of the infrared position detection unit 60, the operability can be improved by providing an audio circuit unit that generates a warning sound and the like. it can. By providing a lens magnification adjustment circuit or a focal length adjustment circuit in the infrared CCD cameras 61 and 62, the resolution and detection range can be set according to the size of the document, the demand for input accuracy, or the work space. Performance can be improved.

In the present embodiment, the control unit 70 is formed separately from the infrared position detecting unit 60. However, the control unit 70 is integrated with the infrared position detecting unit 60 by reducing the size of each circuit described above. It is also possible.

The operation of the coordinate input device configured as described above will be described with reference to FIG. FIG. 18 is a timing chart showing signal waveforms of the coordinate input device according to one embodiment of the present invention. First, a reset signal 63, a vertical clock signal 64, and a horizontal clock signal 65 are simultaneously input to two infrared CCD cameras 61, 62. In response to these input signals, the infrared position detector 60 causes the video signals 66A, 66A from the two infrared CCD cameras 61, 62 to be transmitted.
B is input to the control unit 70. Normal infrared CC
When the pen-shaped coordinate input unit 68 is photographed by the D cameras 61 and 62, the pen itself is photographed.
Only the light emitting portion 7 is photographed, and the other objects are not photographed and are black.

Therefore, each infrared CCD camera 6
The infrared LED 6 is used for the video signals 66A and 66B of
7, a strong peak signal 69A,
69B appears. Therefore, each peak signal 69
A and 69B are detected by the peak detection circuits 74A and 74B, and are calculated as peak detection signals 75A and 75B by the arithmetic circuit 76.
Sent to. The arithmetic circuit 76 uses the conversion table (not shown) calculated in advance in a ROM (not shown) of the control unit 70 to store the infrared CCD camera 6.
Since it is known how many angles the peak signals 69A, 69B appear in the infrared CCD cameras 1 and 62 from the reference origin of the infrared CCD cameras 61 and 62, the two angle information and the two infrared CCD cameras 61 , 62, the coordinate position of the pen-shaped coordinate input unit 68 can be calculated. The obtained coordinate position is transmitted to a computer or the like via the interface circuit 77 and displayed on a display screen (not shown) or the like.

With respect to the coordinate input device operating as described above, a method of calculating a coordinate position will be described with reference to FIG. 2
Infrared LE by two infrared CCD cameras 61 and 62
Peak detection signals 75A and 75B indicating the position of the pen-shaped coordinate input unit 68 having D67 are detected, and the infrared CCD camera 61 and the infrared CCD camera 61 are determined based on the position of the vertical clock signal 64 from the reset signal 63 and the position of the horizontal clock signal 65. 62
Are obtained at (x1, y1) and (x2, y2).

Here, the origin of each coordinate is determined as appropriate. Here, the origin is set at the lower left corner of the photographing range of each of the infrared CCD cameras 61 and 62. From this, the angles α and β from the origin of the infrared LED 67 in the infrared CCD cameras 61 and 62 can be obtained from the following equations. α = tan ⁻¹ (y1 / x1) β = tan ⁻¹ (y2 / x2)

From these equations, the pen angle α, of the infrared LED 67 from the two infrared CCD cameras 61, 62,
β can be calculated. Here, one infrared CCD camera 6
Taking the position 1 as the origin, two infrared CCD cameras 6
Assuming that the distance between 1 and 62 is L, the equations of the straight lines (a) and (b) are represented by the following equations as shown in FIG. (A): y = (tan α) × x (b): y = (tan (π−β)) × (x−L)

By solving these two simultaneous linear equations, the coordinate position of the pen-shaped coordinate input section 68 of the infrared LED 67 can be calculated. Here, in order to increase the calculation speed of the calculation circuit 76, by providing a conversion table for calculating the coordinate position based on the angles α and β, the coordinate position can be immediately obtained, and input of a smooth figure or the like can be performed. it can.

As described above, according to the coordinate detecting device using the image input means such as the electronic camera as described above, it is not necessary to place the tablet board or the like on the worktable or the like, and it is possible to use the space where the worktable is located. Thus, since the coordinate position can be accurately detected in inputting a figure or the like, the work table or the like can be effectively used. Further, even if originals and the like are bundled, a position input operation of a figure or the like can be performed thereon. Further, when a drawing or the like is described in the document, the photographing range can be variably set according to the size of the document and the resolution can be set by a lens magnification adjusting circuit section, so that operability and convenience are improved. it can.

The principle of the optical coordinate input / detection device or the coordinate input / detection device utilizing the image input means such as a camera has been described above. Input / detection device, CRT,
The present invention relates to an information input / detection / display device that displays information at a predetermined position based on coordinates input / detected by a coordinate input / detection device in combination with a display device such as an LCD or a plasma display.

FIG. 20 shows an information input / detection / display member 40.
FIG. 4 is a side view showing the supporting members 41, 42, the control unit 43, and the like for supporting the same. However, 4
Reference numeral 4 denotes a rotating shaft that rotatably supports the information input / detection / display member 40 on the holding member 41, 40A denotes an input / detection / display surface (front surface), and 43A denotes a switch, a key, and the like.

FIG. 21 shows a scene in which the above-described apparatus is actually used. Generally, such a device is shown in FIG.
As shown in FIG. 1, the information input / detection surface and the display surface are arranged to be perpendicular or approximately perpendicular to the floor. Left human M ₁ in the figure, a so-called operator, human M ₂ sitting in the right chair is where looking at the display information corresponding to the input / detection information entered by the operator. In the figure, the operating person M ₁ and the sitting person M ₂ are each one person. However, the number is not always one, and more people may appear. In general, a conference or the like is held via such a device, and usually there are many people who are sitting on a chair.

An example of usage conditions will be described. The person M ₁ sitting in a chair, for example, holds a meeting at a position 2 to 10 m from the front of the device and holds a meeting while looking at the device (display surface). It may be closer than 2 m, but if it gets too close, only one or two people can see this device, so usually two or more people are more than two meters away. Conversely, if this device is used at a distance of more than 10 m, the display surface becomes difficult to see, which is not preferable.

Normally, a conference or the like is held via the above-described apparatus, and the user, especially a user who continues to look at the display surface to obtain information from the display surface, is overworked with eyes. If you take a long time, you will be very tired. Further, even if the usage time is not so long, the burden on the eyes is increased.

The present invention has been made in view of the above point of view, and it is intended to reduce the burden on the eyes of the user as much as possible when used for a long time. The present invention proposes a gentle information input / detection / display device.

FIG. 22 shows the information input / detection / display member 4
0, that is, a view of the information input / detection / display unit 40, the holding members 41 and 42 supporting the unit, the control unit 43, and the like as viewed from the front. Such information input /
In the detection / display device, it is desirable that the display surface 40A be a display device that is easy on the eyes. For example, it is desirable to make various considerations such as adjusting the brightness of the display so that the display is not dazzled more than necessary, or adopting a green color that is easy on the eyes as the background color of the display surface.

Further, in addition to the above, for example, in the present invention, at least the user (the user who continues to look at the display surface) of the outer frame portion (display surface outer frame portion) 40B of the information input / detection / display unit. While viewing the display surface 40A, the portion entering the viewing angle is made as stimulating as possible so as not to hinder the information recognition of the display surface. More specifically, the surface property of the portion of the display surface outer frame portion 40B that enters the viewing angle of the user is non-glossy.

As described above, by making the display surface outer frame portion 40B non-glossy, the user can concentrate on the information on the display surface 40A without worrying about unnecessary reflected light from that portion. There is a merit that the eyes are less tired and hard to be tired even after using for a long time.

Further, according to the present invention, in addition to the outer frame portion 40B as described above, the user enters the visual angle of the user near the display surface while the user is watching the display surface. The other parts that are coming, that is, the holding members 41 and 42 of the information input / detection / display unit and the rotating part 44 are also made to have a non-glossy surface property.

As described above, to make the surface texture non-glossy
As a method, for example, the surface may be made non-mirror. Specifically, when processing is performed so that the surface roughness is 1 s or more, or when the surface is formed by molding, the surface roughness of the mold may be finished to that extent.

Another method for making the surface texture non-glossy is to use a non-glossy surface texture based on black to green, which easily absorbs light, to constitute the outer frame portion of the display surface, the support member, and the like. What should I choose?

Further, as another method, there is a method of performing a matting process. For example, a matte coating used for an optical device such as a camera can be suitably used. Further, in this case, if a paint capable of excellent matting is used, it is not always necessary to use a black matte paint, and a gray or green-dark paint may be used.

In the present invention, as described above, while the user is looking at the display surface, portions other than the display surface which come into the user's viewing angle at the same time are treated with a non-glossy, non-mirror surface. By performing the matting process or the like, the information input / detection / display device that is easy on the user's eyes can be provided.

The information input / detection / display device as described above is generally used in an indoor conference room, but such a conference room usually has many fluorescent lamps arranged on the ceiling. In many cases, the reflected light of the fluorescent lamp is reflected on a portion other than the display surface of the information input / detection / display device, and enters the user's eyes, making the display surface difficult to see or discomfort. My eyes get tired. Also, sunlight entering through the window may be reflected, making it difficult to use.
However, by using such a surface property that the reflected light is hardly reflected as in the present invention, it can be used comfortably without such a problem.

Further, according to the present invention, while a user (a user who continues to look at the display surface) looks at the display surface, a portion that enters the viewing angle does not hinder information recognition on the display surface. As another example for minimizing irritation as much as possible, the display frame outer frame portion, the support member, and the like may be colored non-white.

As is well known, since white easily reflects light, if the outer frame portion of the display surface or the support member is made white, the light of the fluorescent lamp or sunlight is reflected, and the display surface becomes very difficult to see. Alternatively, the comfort in use is lost due to the influence of the reflected light.

In the present invention, in view of this point, these colors are set to non-white colors. Specifically, the color is light gray, light brown, dark green, and the like. In particular, the green color has an effect that it is gentle on the eyes and cannot be used even if it is in the field of view for a long time.

[0081]

According to the first aspect of the present invention, in the information input / detection / display device, the surface of a portion of the outer frame portion of the display device which is within the viewing angle of the user is non-glossy, Since the light is scattered, fluorescent light and sunlight are reflected by those parts and enter the user's eyes, making it difficult to see the display surface, feeling discomfort, and tired eyes. I have no longer to do it.

According to the second aspect of the present invention, in the information input / detection / display device, the surface of a portion of the holding member of the display device which is within the viewing angle of the user is made non-glossy to scatter light. As a result, fluorescent lights and sunlight were reflected from those areas and entered the user's eyes, preventing the display surface from becoming difficult to see, discomfort, and eyestrain. .

In the information input / detection / display device according to the third aspect, a portion of the outer frame portion of the display surface of the display device which falls within the viewing angle of the user or a portion of the holding member of the display device which falls within the viewing angle of the user. The surface of the surface is made non-mirror, making it difficult to reflect light, so fluorescent light and sunlight are reflected by those parts and enter the user's eyes, making it difficult to see the display surface or discomfort I no longer remember and tired of my eyes.

In the information input / detection / display device according to the fourth aspect, a portion of the outer frame portion of the display surface of the display device which falls within the viewing angle of the user or a portion of the holding member of the display device which falls within the viewing angle of the user. The non-white color makes it easier to absorb light, so fluorescent light and sunlight are reflected by those parts and enter the user's eyes, making the display surface difficult to see and discomfort. And no more tired eyes.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an optical coordinate input / detection device to which the present invention is applied.

FIG. 2 is a diagram of a light emitting / receiving unit attached to the coordinate input surface of FIG. 1 as viewed from a direction perpendicular to the coordinate input surface.

FIG. 3 is a diagram for explaining the operation of the light receiving / emitting means in detail.

FIG. 4 is a diagram showing a geometric relative positional relationship between a light receiving / emitting means and a coordinate input area.

FIG. 5 is a diagram showing an embodiment in which the light receiving and emitting means is installed on the surface of the display.

FIG. 6 is a diagram showing a typical optical coordinate input device.

FIG. 7 is a configuration diagram of a third example of the optical coordinate detection device.

FIG. 8 is a conceptual diagram of a configuration of an embodiment of a light emission detection device.

FIG. 9 is a conceptual diagram of a configuration of a light emission detecting unit using an aperture.

FIG. 10 is a diagram showing a specific arrangement example of a cylindrical lens and a PSD.

FIG. 11 is a diagram illustrating a specific arrangement example of apertures and PSDs.

FIG. 12 is a diagram for explaining an example in which light is condensed so as to be parallel to a coordinate input surface and a fan-shaped beam parallel to the coordinate input surface is created.

FIG. 13 is a configuration block diagram of a control circuit for an LED and a PSD.

FIG. 14 is a view showing an embodiment of the shape of the tip of a pen which is a position indicating rod.

FIG. 15 is a diagram showing an example of a corner cubic in which three plane mirrors are combined so as to be perpendicular to each other.

FIG. 16 is a diagram showing a specific example of a positional relationship between a coordinate input surface, a cylindrical lens forming a light receiving angle detection unit, and a PSD.

FIG. 17 is a block diagram illustrating a configuration of a coordinate input / detection device.

FIG. 18 is a timing chart showing a signal waveform of the coordinate input device of the present invention.

FIG. 19 is a diagram for explaining a method of calculating a coordinate position.

FIG. 20 is a diagram showing an information input / detection / display member together with a holding member that supports it, a control unit, and the like.

FIG. 21 is a diagram showing an example in which an information input / detection surface and a display surface are arranged vertically and used.

FIG. 22 is an example of the present invention, and is a view of the information input / detection / display device according to the present invention as viewed from the front.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Light receiving / emitting means, 2 ... Coordinate position, 3 ... Coordinate input area (coordinate input device, coordinate input surface), 4 ... Retroreflective member,
5 (5A, 5B) ... light source (LED), 6 (6A, 6B)
... optical lens, 7 (7A, 7B) ... PSD, 8 (8A,
8B) Cylindrical lens, 9 Mask, 10 Aperture, 11, 13 Photodiode, 12, 1
4 phototransistor, 15 touch part, 16 touch coordinates, 21, 22 light emission detection device, 21A, 22A
... Light-emitting unit, 21B, 22B ... Light-receiving angle detecting unit, 23 ... Reference point, 24 ... Pen, 40 ... Information input / detection / display member,
40A: display surface, 40B: outer frame portion of display surface, 41, 42
... Holding member, 43, control unit group, 44, rotating shaft.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiromasa Shimizu 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Company (72) Inventor Sadao Takahashi 1-3-6 Nakamagome, Ota-ku, Tokyo Ricoh Co., Ltd. (72) Inventor Susumu Okada 1-3-6 Nakamagome, Ota-ku, Tokyo F-term in Ricoh Co., Ltd. 5B068 AA05 AA15 AA33 BB18 BC02 BC04 BD02 BD17 BD20 BE08 CC13 5B087 AA09 AB04 AC09 AE02 CC15 CC26 CC34 DD17

Claims (4)

[Claims] 1. A two-dimensional coordinate system comprising a plurality of light-emitting means and a plurality of light-receiving means, and detecting the presence or absence of a light-blocking means in an optical path for light emission / reception to detect a plane or substantially a plane of the light-blocking means. A coordinate input / detection device or image input means for capturing a plane or almost plane coordinate input / detection area, and converting a part of the information captured by the image input means into two-dimensional coordinate information; And a display device for displaying information at a predetermined position on the basis of the coordinates input / detected by the coordinate input / detection device. In an information input / detection / display device in which a detection surface and a display surface of the display device are combined, a surface property of a portion of a display surface outer frame portion of the display device which is within a viewing angle of a user is non-glossy. An information input / detection / display device characterized in that: 2. A two-dimensional coordinate system comprising a plurality of light-emitting means and a plurality of light-receiving means, and detecting the presence or absence of a light-blocking means in an optical path for light emission / reception to detect a plane or substantially a plane of the light-blocking means. A coordinate input / detection device or image input means for capturing a plane or almost plane coordinate input / detection area, and converting a part of the information captured by the image input means into two-dimensional coordinate information; And a display device for displaying information at a predetermined position on the basis of the coordinates input / detected by the coordinate input / detection device. In an information input / detection / display device combining a detection surface and a display surface of the display device, the information input / detection / display device includes an information input / detection / display device unit and the unit. And a control unit for processing the coordinate information and the like,
An information input / detection / display device, characterized in that the surface property of a portion of the holding member that enters a viewing angle of a user is non-glossy. 3. The information input / detection / display device according to claim 1, wherein the non-glossy property is obtained by making the surface non-mirror. 4. The information input / detection / display apparatus according to claim 1, wherein a color of a portion entering the viewing angle of the user is a non-white color.