JP2001195189A - Information input/display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information input/display device which enables a user to efficiently hold a conference while using the information input/display device on the site of the conference, etc. SOLUTION: This information input/display device 100 is provided with a coordinate detector 101 to detect planar or approximately planar two-dimensional coordinates by presence/absence of light shielding in optical paths from plural light emitting means to plural light receiving means in a coordinate detection area 103 to be formed by the plural light emitting means and the plural light receiving means and a display device 102 to display information at a prescribed position based on the coordinates detected by the coordinate detector 101, the coordinate detection area 103 of the coordinate detector 101 and a display area 104 of the display device 102 are arranged so that they are overlapped and a material sticking part 105a with adhesion (or magnetic force responsiveness) is provided in the vicinity of the display area 104.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information input / display device, and more particularly to a personal computer and the like.
The present invention relates to a so-called touch panel type information input / display device that detects a coordinate position indicated by a pointing member such as a pen, a finger, or the like in order to input or select information. This information input / display device is applied to an electronic blackboard, a large display, and the like.

[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. .

[0003] Another method is disclosed in Japanese Patent Application Laid-Open No. 61-239.
There is an ultrasonic type touch panel coordinate input / detection device as known from Japanese Patent No. 322. 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.

[0004]

However, according to the coordinate detecting device for detecting a coordinate position by electrostatic or electromagnetic induction as in the above-mentioned prior art, since the coordinate input surface has an electric switch function, the manufacturing cost is reduced. And the need for a cable connecting the pen and the main body increases the operability.

[0005] Further, in the ultrasonic type, since a finger input is premised, when a pen input is made with a material (soft and elastic) having an absorption on a panel and a straight line is drawn, a press is performed. At this point, stable attenuation is obtained, but there is a problem that a straight line is broken because sufficient contact cannot be obtained when moving the pen. Further, if the pen is pressed with an excessive force to obtain sufficient contact, the pen is distorted due to the elasticity of the pen accompanying the movement of the pen, and a force to return during movement is exerted. For this reason, if you try to draw a curve in the middle of drawing a straight line, the force to hold down the pen is weakened, and the force to restore the distortion is excellent, so the tip of the pen returns and sufficient contact, that is, stable attenuation is obtained. It is determined that the input has been interrupted. For this reason, there has been a problem that reliability cannot be ensured as pen input.

[0006] However, regarding the problems of the prior art as described above, the present applicant has first disclosed in Japanese Patent Laid-Open No. 10-127.
No. 035, Japanese Patent Application Laid-Open No. 5-173
No. 699, Japanese Unexamined Patent Publication No.
An optical coordinate input / detection device represented by Japanese Patent Application Laid-Open No. 319501/1991 and an optical input / detection device represented by Japanese Patent Application Laid-Open No. This is solved by the coordinate input / detection device used, and a touch panel type coordinate input / detection device can be realized with a relatively simple configuration.

On the other hand, an information input / display device (coordinate input device) comprising a conventional coordinate detection device and a display device for displaying various information, wherein the coordinate detection region of the coordinate detection device and the display region of the display device are arranged so as to overlap each other. / Detection device).

In recent years, such an information input / display device (coordinate input / detection device) has been positioned as a powerful tool for inputting and selecting information with the spread of personal computers and the like, and is disclosed in the above publications. There are many issues other than those that have been intensively studied, but there are still many issues that need to be solved for full-scale practical use.

As one of the conventional problems, there is a problem that the usability is poor when using various materials while inputting and displaying information by an information input / display device (coordinate input / detection device). For example, when using the device at a site such as a meeting, paper, photos, samples, and documents such as documents are often used together,
Since there is no site for posting these materials, there is a problem that it is difficult to efficiently hold a meeting while using an information input / display device at a site such as a meeting.

The present invention relates to an information input / display device provided with such an optical coordinate detecting device or a coordinate detecting device utilizing image input means such as a camera. A part of the information input / display device is made to be sticky or magnetically responsive, and it is possible to freely attach the pointing sticks and documents necessary for actually using this device at meetings etc. Usability that could not be realized with information input / display device is realized,
Make meetings very efficient. For example, FIG.
The present invention is easily carried out by sticking a document or the like aside at all times as shown at 0 and using an information input / display device. In addition, it has such a function, and sometimes has a function as a bulletin board for pasting a document or the like even when the information input / detection / display function is not used.

Secondly, a part of the information input / display device is made of a material capable of piercing a needle-like member, and a document or the like necessary for actually using the device at a meeting or the like is provided. A needle-shaped member such as a drawing stick can be freely attached to the device, so that it is easy to use that cannot be realized with a mere information input / display device, and a conference or the like can be performed very efficiently. For example, as shown in FIG. 20, a document or the like is always pasted aside and the information input / display device is used to easily perform the present invention. In addition, since such a function is provided, even when the information input / detection / display function is not used, a function as a bulletin board for pasting a document or the like may be provided.

[0012]

In order to achieve the above object, the present invention firstly comprises a plurality of light emitting means and a plurality of light receiving means, and a coordinate detection area formed by these light emitting means and light receiving means. A coordinate detecting device that detects two-dimensional coordinates of a flat or substantially flat surface depending on whether light is blocked in an optical path from the light emitting unit to the light receiving unit, or an image that captures image information of a flat or substantially flat coordinate detection area A coordinate detecting device having input means and a converting means for converting a part of the image information of the image information taken in by the image input means into two-dimensional coordinate information, and based on the coordinates detected by the coordinate detecting device. A display device for displaying information at a predetermined position, wherein a coordinate detection region of the coordinate detection device and a display region of the display device are arranged so as to overlap with each other. In broadcast input and display device, characterized in that a document posting part having tackiness or force responsive to the vicinity of the display area.

Secondly, it has a plurality of light emitting means and a plurality of light receiving means, and blocks light in an optical path from the light emitting means to the light receiving means in a coordinate detection area formed by the light emitting means and the light receiving means. A coordinate detecting device that detects two-dimensional coordinates of a plane or a substantially plane, or an image input unit that captures image information of a coordinate detection region of a plane or a substantially plane, and image information that is captured by the image input unit. Some image information of
A coordinate detection device having conversion means for converting the coordinate detection device into dimensional coordinate information, and a display device for displaying information at a predetermined position based on the coordinates detected by the coordinate detection device; and a coordinate detection area of the coordinate detection device. In an information input / display device in which a display region of the display device is overlapped, a material posting portion capable of piercing a needle-like member is provided near the display region.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the information input / display device of the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1) First, the principle of an information input / display device having an optical coordinate detecting device to which the present invention is applied will be described. FIG. 1 is an explanatory diagram showing an information input / display device according to Embodiment 1 of the present invention. The coordinate input area (coordinate detection area) 3 has a rectangular shape, and may be a display surface for electronically displaying an image, a white board written with a pen such as a marker, or the like. In the first embodiment, it is assumed that the pointing means 2 made of an optically opaque material such as a user's finger, a pen, or a pointing stick touches the coordinate input area 3. It is an object of such an optical coordinate detecting device to detect the coordinates of the pointing means 2 at this time.

As shown in FIG. 1, light receiving / emitting means 1 is mounted at both upper ends of the coordinate input area 3. Light emitting / receiving means 1
From toward the coordinate input area 3, L1, L2, L3
, Ln light beam (probe light) is irradiated. Actually, the probe light emitted from the point light source 5 is a fan-shaped plate-like light wave that spreads along a plane parallel to the coordinate input area 3.

A retroreflective member 4 is mounted around 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 6 among the fan-shaped plate-like light waves emitted from the light receiving / emitting means 1, the beam 6 is reflected by the retroreflective member 4 and returns to the light receiving / emitting means 1 through the same optical path as the retroreflected light 7 again. Proceed back. 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 return light of each of the probe lights L1 to Ln has returned to the light receiving / emitting means 1.

Now, the user manually moves the position 8 with the hand (instruction means 2).
Think about touching. At this time, the probe light 9 is at position 8
And does not reach the retroreflective member 4. As described above, since the return light of the probe light 9 does not reach the light receiving / emitting means 1, it is detected by detecting that the return light corresponding to the probe light 9 is not received.
It can be detected that the indicating means 2 has been inserted on the extension line (straight line L) of.

Similarly, the probe light is emitted from the light receiving / emitting means 1 provided at the upper right of FIG. 1 to detect that the return light corresponding to the probe light 10 is not received. Pointing means 2 on (straight line R)
Can be detected. If the straight line L and the straight line R can be obtained, the coordinates at which the indicating means 2 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 L1
To Ln, a mechanism for detecting which probe light is 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 and receiving means 1 attached to the coordinate input area 3 of FIG. 1 when viewed from a direction perpendicular to the coordinate input area 3. Here, for simplicity, the description will be made on a two-dimensional plane parallel to the coordinate input area 3.

In the general configuration, the light receiving / emitting means 1 is a point light source 5,
It comprises a condenser lens 11 and a light receiving element 12. The point light source 5 emits fan-shaped light in a direction opposite to the light receiving element 12 when viewed from the light source. The fan-shaped light emitted from the point light source 5 is considered to be a set of beams traveling in arrows 13 and 14 and other directions. The beam that has traveled in the direction of arrow 13 is reflected by the retroreflective member 4 and
And reaches the position 15 on the light receiving element 12. The beam that has traveled in the direction of arrow 14 reaches the position 16 on the light receiving element 12 by the retroreflective member 4.

The light emitted from the point light source 5, reflected by the retroreflective member 4 and returned along the same path reaches respective different positions on the light receiving element 12 by the action of the condenser lens 11. Therefore, when the pointing means 2 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 12 corresponding to the beam. Therefore, by examining the distribution of the light intensity on the light receiving element 12, 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 12 is provided on the focal plane of the condenser lens 11. Light emitted from the point light source 5 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 5. The center of the condenser lens 11 is installed so as to coincide with the position of the point light source. The return light returning from the retroreflective member 4 is collected by the condenser lens 1.
Since the light passes through the center of No. 1, the light travels along a symmetrical path behind the lens (light receiving element side).

At this time, the light intensity distribution on the light receiving element 12 is considered. If the indicating means 2 is not inserted, the light receiving element 1
Although the light intensity distribution on the light receiving element 12 is substantially constant, when the pointing means 2 for blocking light is inserted at a position as shown in FIG. At the position, a region where the light intensity is weak occurs (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) as a function of Dn. Note that f represents the distance between the point light source 5 and the light receiving element 12.

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 θL between the pointing means 2 and the coordinate input area 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, and D is obtained by the above function.
θL = g (θnL) 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. ΘR = h (θnR) where θnR = arctan (DnR
/ F).

Here, the light emitting / receiving means 1 on the coordinate input area 3
The mounting interval between the points is W as shown in FIG.
Then, the coordinates (X, Y) of the point designated by the pointing means 2 on the coordinate input area 3 are as follows: X = (W · tan θR) / (tan θL + tan θR) Y = (W · tan θL · tan θR) / (Tan θL + tan θR).

As described above, X and Y can be represented as functions of DnL and DnR. That is, the positions of the dark points DnL and DnR on the light receiving element 12 on the right and left light receiving and emitting means 1 are detected, and the coordinates of the point designated by the indicating means 2 are detected by considering the geometric arrangement of the light receiving and emitting means. can do.

Next, an embodiment will be described in which the above-described optical system is installed in the coordinate input area 3, for example, on the surface of a display.
FIG. 5 shows an embodiment in which one of the left and right light emitting / receiving means 1 described in FIGS. 1 and 2 is installed on a display surface (coordinate input area 3).

FIG. 3 shows a cross section of the display surface, which is viewed in a direction from the negative side to the positive side of the y axis shown in FIG. In addition, A and B in the figure are displayed by changing the viewpoint as shown in the figure for the sake of explanation.

The light emitting means of the light emitting / receiving means 1 will be described. As the light source 20, a light source such as a laser diode or a pinpoint LED that can narrow the spot to some extent is used. Light emitted perpendicularly to the display surface 3 from the light source 20 is collimated by the cylindrical lens 21 only in the x direction. This is because the collimator is turned back by the half mirror 26 and then distributed as parallel light in a direction perpendicular to the display surface.

After exiting the cylindrical lens 21,
Is collected by two cylindrical lenses 22 and 23 whose curvature distribution is orthogonal to each other in the y direction in FIG. The portion A in the figure shows the arrangement of the cylindrical lens groups and the high-speed focusing state 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 23. Here, a slit 24 that is narrow in the y direction and elongated in the x direction is inserted. That is, the linear secondary light source 25 is formed at the slit position. The light emitted from the secondary light source 25 is turned back by the half mirror 26, and does not spread in the vertical direction of the display surface 3 and is parallel light, and spreads in a fan shape in the direction parallel to the display surface 3 around the secondary light source 25. , Along 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 in the same direction as the half mirror 26 (arrow C). The light transmitted through the half mirror 26 travels parallel to the display surface 3, passes through the cylindrical lens 27, and enters the light receiving element 28.

At this time, the secondary light source 25 and the cylindrical lens 27 are in a conjugate positional relationship with respect to the half mirror 26 (FIG. D). Accordingly, the secondary light source 25 is the point light source 5 in FIG.
, And the cylindrical lens 27 corresponds to the condenser lens 11 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, and the condensing lens 11 and the light receiving element 12 shown in FIG.
Corresponding to

The information input / display device of the present invention further comprises:
In addition to the coordinate detection device described above, a display device for displaying information at a predetermined position based on the coordinates detected by the coordinate detection device is provided. As such a display device, a large-sized plasma display or LCT display can be used.

The coordinate detection area (coordinate input area) of the coordinate detection device and the display area (display surface) of the display device are arranged so as to overlap in a plane. Here, the coordinate detection area (coordinate input area) of the coordinate detection device and the display area (display surface) of the display device are arranged so as to overlap with each other because of the detection coordinates on the coordinate detection area and the display position on the display area. This is because, for example, characters and graphics are displayed along the detected coordinates, and the displayed characters and graphics are accurately specified or selected by superimposing them.

Further, a material posting section, which is a feature of the present invention, is provided near the display area. This material posting portion has a structure having adhesiveness or magnetic responsiveness, or a structure capable of piercing a needle-shaped member.

The operation of the above configuration will be described with reference to FIGS. FIG. 20 is an explanatory diagram showing a configuration of an information input / display device provided with an adhesive material posting section 105a. FIG. 21 is an explanatory view showing information provided with a magnetic responsive material posting section 105b. FIG. 22 is an explanatory diagram showing a configuration of the input / display device, and FIG. 22 is an explanatory diagram showing a configuration of the information input / display device provided with a material posting portion 105c capable of piercing a needle-like member.

20 to 22, 100 is an information input / display device, 101 is a coordinate detection device,
102 is a display device, 103 is a coordinate detection device 101
Is a coordinate detection area (coordinate input area); 104 is a display area of the display device 102;
05c) is a material posting section for posting materials and the like.
Reference numeral 6 denotes a material such as a photograph or a graph, reference numeral 107 denotes a magnet which can be freely attached to and detached from the material posting portion 105b, and reference numeral 108 denotes a pin which can be inserted into the material posting portion 105c.

In the present invention, since the coordinate detection area of the coordinate detection device and the display area of the display device are arranged so as to overlap with each other, the coordinate detection device 101 and the display device 102 are arranged as shown in FIGS. Are placed one on top of the other, and
The coordinate detection area 103 and the display area 104 are also arranged so as to overlap.

The material posting section 105 (105a to 105)
c) has an action of attaching materials such as paper, photographs, samples, and the like, a writing instrument, and a pointing rod, and appropriately positions, sizes, and shapes the information input / display device of the present invention according to the main use. Change and arrange. For example, when the main use of the information input / display device is coordinate input (information input), it is preferable to dispose the material posting section 105 at a position where the detection of coordinates is not hindered.

When the information input / display device is used for inputting coordinates and utilizing materials, it is preferable in terms of operation of the device to arrange the material posting section 105 relatively near the coordinate detection area 103. Here, a case where the material posting unit 105 is provided near the coordinate detection region 103 will be described. However, the material posting unit 105 may be provided so as to overlap the coordinate detection region 103.

The material posting portion 105a shown in FIG. 20 has tackiness (adhesion). The adhesive having such adhesiveness is preferably a detachable adhesive such as "Franklin Covinax 21-00" (registered trademark), "Note Stakes", or "Clean Tack" (all It is preferred to use a registered trademark (Moore Business Form, Inc., Lake Forest, Ill.) Or of this type.

In the case where it is desired to post the data in the same place forever, a permanent adhesive may be used. Examples of such a permanent adhesive include a pressure-sensitive adhesive, a rewet adhesive, a radiation-curable adhesive, a heat-sensitive adhesive, and a solvent-melting adhesive.

According to the material posting portion 105a shown in FIG. 20, the material posting portion 105a is formed by an adhesive member without using a specific fixing device such as a clip, a magnet, and a pin.
The material 106 can be appropriately posted. In addition, as a material having adhesiveness, a highly-chargeable member such as celluloid or plastic can also be used, and even with this, a material can be displayed by electrostatic force without using a specific fixing device such as a clip, a magnet, and a pin. The material 106 can be appropriately posted on the unit 105a. Alternatively, it is also possible to attach a writing instrument or a pointing stick depending on the strength of the adhesive.

The material posting section 105b shown in FIG.
Has magnetic responsiveness. Iron or the like can be considered as having such magnetic force response. According to the material posting unit 105b shown in FIG. 21, the material 106 can be appropriately posted on the material posting unit 105b using the magnet 107 or the like.

The material posting section 105c shown in FIG.
Has a structure capable of piercing a needle-like member such as a pin 108 or a thumbtack. Such members include wood,
Soft members such as rubber, cork, cloth, paper and the like are conceivable. FIG.
According to the material posting section 105c shown in FIG. 2, the material 106 can be appropriately posted on the material posting section 105c using the pin 108 or the like.

As described above, the information input / display device 100 according to the first embodiment includes the material posting portion 105 having a structure having adhesiveness or magnetic response or a structure capable of piercing a needle-like member. It is possible to freely attach the sticks and documents required when using the information input / display device at the site such as a meeting, so that it is easy to use that could not be realized with a simple information input / display device Can be realized, and information input and
It is possible to efficiently hold a conference while using the display device.

Even when the information input / display device 100 according to the first embodiment is not used as a coordinate detecting device or a display device, the information posting unit 105 can be used as a bulletin board for pasting a document or the like. Since the material can be held on the information input / display device 100, it can be used for storing the material.

That is, when the information input / display device is used at a site such as a meeting in an office, materials and documents are used in many general meetings, but the conventional information input / display device is not used for the material. Since there is no site for posting information, it is necessary to store materials and the like in another place, and there is a problem in efficiently using the materials and the like while using the information input / display device. Since the information input / display device of the present invention can hold materials and the like on the information input / display device in advance, it is possible to efficiently utilize the materials and improve the work efficiency of a meeting or the like, and to improve the efficiency of the materials. It can also be used for storage purposes.

As described above, according to the present invention, with the spread of personal computers and the like in recent years, the realization of a coordinate detection device positioned as a powerful tool for inputting and selecting information has been aimed at. It solves important issues and promotes their commercialization in many cases.

As described above, the invention made by the inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to the above, and various modifications can be made without departing from the gist of the invention. It goes without saying that it is possible. Hereinafter, cases in which another configuration is applied as a coordinate detection device will be described in Modification Examples 1 to 3.

(Modification 1) Next, the principle of an information input / display device having an optical coordinate detection device of Modification 1 will be described. FIG. 6 shows a typical optical coordinate detection device, for example, a light emitting diode (LED) 31 arranged Xm horizontally in the horizontal direction as shown in FIG. Xm of, for example, phototransistors 32 and Yn of LEDs 33 arranged in the vertical direction
And Yn phototransistors 34 which are opposed to each other in a one-to-one relationship to form a coordinate detection area 35.

When a touch input is performed on, for example, the touch portion 36 in the coordinate detection area 35, the light path passing through the touch portion 36 is blocked, so that the amount of light received by the phototransistors 32 and 34 in the cut light path is reduced. descend. Therefore, the phototransistor 3 in which the amount of received light is reduced
The positions of the touch coordinates 2 and 34 are averaged to calculate the position 37 of the touch coordinates.

(Modification 2) Next, the principle of an information input / display device having an optical coordinate detection device of Modification 2 will be described. FIG. 7 shows a third example of the optical coordinate detecting device.
FIG. 3 is a configuration diagram of an example of FIG. Here, two adjacent corners (k1, k2) of the coordinate input surface 41 which is a quadrangular flat plate
Then, light emission detection devices (coordinate detection devices) 42 and 43 are fixedly installed. Light is emitted from the two light emission detection devices 42 and 43 onto the coordinate input surface 41. On the other hand, the user points to an arbitrary position on the coordinate input surface 41 with the position indicator stick, that is, the pen 45.

At this time, the light emission detecting devices 42 and 43 are connected to the pen 45 out of the light emitted from the light emission detecting devices 42 and 43.
The light which is reflected by and returns to the light emission detection devices 42 and 43 is detected, and the position coordinates of the pen 45 are calculated. The light emission detection devices 42 and 43 have the same configuration, and include light emission units 42a and 43a and light reception angle detection units 42b and 43b.
It is composed of

Here, in the light emission detecting devices 42 and 43, both the light emitting optical axis of the light emitted from the light emitting section and the light receiving optical axis of the light receiving angle detecting section face the direction of the reference point 44 on the coordinate input surface. As described above, it is installed on the coordinate input surface 41.

In FIG. 7, a line segment a1 connecting the angle k1 of the coordinate input surface 41 and the reference point 44, and the angle k2 of the coordinate input surface 41
The direction of the line segment a2 connecting the reference point 44 and the reference point 44 is defined as the light emitting optical axis and the light receiving optical axis of each of the light emission detection devices 42 and 43. Here, the line segments a1 and a2 are directions in which the angle of the coordinate input surface 41 is bisected into 45 °. Also, the angle k2 of the coordinate input surface 41
Is the origin (0, 0), and the position on the coordinate input surface 41 is represented by an XY coordinate system in which the horizontal direction is the Y axis and the vertical direction is the X axis.

FIG. 8 is a conceptual diagram showing the structure of the light emission detecting devices 42 and 43. Here, the light emitting unit 42 of the light emission detecting device
Reference numerals a and 43a each include a light source (LED) 46 and an optical lens 47. An optical lens 47 that changes only the magnification in one direction of the image;
Alternatively, a toroidal lens is used in which only the magnification in one direction of the image is changed, and the magnification is not changed by the incident angle. The light-receiving angle detectors 42 b and 43 b of the light-emission detecting device include a PSD 48 and a cylindrical lens 49.

The light emitted from the LED 46 is transmitted to the coordinate input surface 41 by an optical lens 47 disposed immediately before the light.
Are condensed so as to become a parallel beam. That is, FIG.
As shown in FIG. 2, light in a direction perpendicular to the coordinate input surface 41 is condensed by the optical lens 47 so as to be parallel to the coordinate input surface 41, and further becomes a fan-shaped beam parallel to the coordinate input surface 41. To do. As described above, if 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, the LED 46 may emit visible light, but L2656 (manufactured by Hamamatsu Photonics) that emits infrared light (wavelength 890 nm) is used. The length of the optical lens 47 in the direction perpendicular to the coordinate input surface 41 is 10 mm, and the length in the direction parallel to the coordinate input surface 41 and perpendicular to the emission optical axis of the infrared light is about 10 mm. The focal length is about 6 mm. Furthermore, it is fixedly arranged so that the light emitting point of the LED 46 comes to the focal position of the optical lens.

As shown in FIG. 8, the cylindrical lenses 49 constituting the light receiving angle detecting units 42b and 43b are arranged so as to converge the reflected light from the pen 45 in a direction parallel to the coordinate input surface 41. . The focused spot light is received by the PSD 48. As shown in the figure, the PSD 48 has a structure elongated in a direction parallel to the coordinate input surface 41, and the light receiving surface is a PN junction surface for converting incident light into an electric signal.

In the PSD 48, output terminals (S1, S2) for extracting a current are provided at both ends of the light receiving surface, and the currents (I ₁ , I ₂ ) are inversely proportional to the distance between the light receiving point S0 and the output terminal. Is output from this output terminal. The current (I ₁ , I ₂ ) is A / D converted and calculated by a microcomputer, whereby the position of the light receiving point S0 can be specified, and further, the light receiving angle of the reflected light from the pen 45 can be calculated. . A control circuit for performing this arithmetic processing will be described later.

As the PSD 48, a PSD having a length of 13 mm in a direction parallel to the coordinate input surface 41 and a length of approximately 1 mm in a direction perpendicular to the coordinate input surface 41 may be used. For example, S3270 manufactured by Hamamatsu Photonics can be used.

FIG. 10 shows the cylindrical lens 49 and P
A specific arrangement example of the SD 48 is shown. Here, the cylindrical lens 49 has a length in the direction parallel to the light receiving surfaces of the coordinate input surface 41 and the PSD 48 of about 10 mm and a length in a direction perpendicular to the coordinate input surface 41 of about 10 mm. Are arranged so that the distance between the optical center position of the above and the light receiving surface of the PSD 48 is 6.5 mm. Also,
A mask 50 made of a material such as black ABS is arranged around the cylindrical lens 49 so that the reflected light from the pen 45 does not directly enter the light receiving surface of the PSD 48.

Further, the focal length of the cylindrical lens 49 varies with the difference between the incident angle of the reflected light from the pen 45 and the distance between the lens and the PSD.
The maximum value max of the distance between the center of No. 9 and the light receiving surface of PSD 48
And the minimum value min. For example, in the case of FIG. 10, since max = 9.2 mm and min 6.5 mm, a cylindrical lens 49 having a focal length of about 9 mm may be used. The length of the mask 50 in the direction parallel to the coordinate input surface 41 may be longer than the length of the light receiving surface of the PSD 48 (= 13 mm).
In this case, it is sufficient that the distance is about 15 mm.

In the example shown in FIG. 8, a configuration is shown in which the cylindrical lens 49 is used to squeeze the reflected light from the pen 45 into spot light. However, the present invention is not limited to this. As shown in FIG. And a cylindrical lens 49
Instead of this, an aperture having one minute transmission hole may be used.

FIG. 9 is a conceptual diagram showing the structure of the light emission detecting devices 42 and 43 using the aperture 51. In the case of this modified example, of the reflected light from the pen 45, only the light that has passed through the transmission hole 52 is received at the light receiving point S0 of the PSD 48 as spot light. The aperture 51 is black A
A thin plate made of a material such as BS may be used.

FIG. 11 shows an aperture 51 and a PSD 48.
The following shows a specific arrangement example. Here, as in FIG.
When the length of the light receiving surface of SD48 is 13 mm, PSD4
An aperture 51 is arranged at a position which is half the distance 6.5 mm away from the light receiving surface 8 so that the light receiving surface of the PSD 48 is parallel to the surface of the aperture.

The size of the aperture 51 is preferably larger than the light receiving surface of the PSD 48 so that the reflected light from the pen 45 does not directly enter the light receiving surface of the PSD 48. For example, the size of the aperture 51 can be set to about 15 mm × 3 mm with respect to the size of the light receiving surface of the PSD of 13 mm × 1 mm. The transmission hole 52 is shorter than the length (13 mm) of the light receiving surface of the PSD 48 in a direction parallel to the coordinate input surface 41 and longer than the length (1 mm) of the light receiving surface of the PSD in a direction perpendicular to the coordinate input surface 41. I do. For example, as shown in FIG. 11, 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 46, the optical lens 47, the PSD 48, the cylindrical lens 49 or the aperture 51) are arranged in the above-described relationship. And may be integrally molded into one housing.

However, the light emitting section (LED 46, optical lens 47) and the light receiving angle detecting section (PSD 48, cylindrical lens 49 or aperture 51) emit light mutually.
The light receiving optical axis of the infrared light emitted from the LED 46 and the light receiving optical axis of the infrared light received by the cylindrical lens 49 or the aperture 51 are in the same direction. It is necessary to arrange them so that

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 detection is performed by scanning the light beam using a rotary motor. It is.

FIG. 13 is a block diagram showing a configuration of a control circuit for the LED 46 and the PSD 48. This control circuit is LED
The control of the light emission timing of 46 and the calculation of the currents (I ₁ , I ₂ ) output from the PSD 48 are performed. As shown in the figure, the control circuit mainly includes an MPU 67, a ROM 65 for storing programs and data, and a RAM 6 for storing programs and data.
6. Timer 68 for controlling light emission time interval, interface driver 69, A / D converter 63 and L
The ED driver 64 is configured to be connected to a bus.

The current (I ₁ ,
As a circuit for calculating I ₂ ), a PSD output terminal (S
1, S2), an amplifier 61 and an analog operation circuit 62 are connected as shown in the figure. The currents (I ₁ , I ₂ ) output from the PSD 48 are input to the amplifier 61 and amplified. The amplified current signal is supplied to the analog operation circuit 6
In step 2, processing such as I ₂ / (I ₁ + I ₂ ) is performed, and further converted to a digital signal by the A / D converter 63 and passed to the MPU 67.
Thereafter, the MPU 67 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 detection devices, or may be incorporated in a part of the coordinate input surface 1 as a separate housing. Further, 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 69.

Next, FIG. 14 shows a modified example of the shape of the tip of the pen 45 which is a position pointing stick used in the present invention.
The pen 45 has a shape similar to a so-called writing instrument, and has a “light reflecting structure” (retroreflective portion) at its tip, that is, in a region through which light emitted from the light emission detection devices 42 and 43 passes. Prepare. In particular, the “structure that reflects light” is a recursive structure that reflects light emitted from the light emission detection devices 42 and 43 in the same direction as the incident direction.

FIG. 14 shows a configuration example in which the tip of the pen 45 is composed of a large 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. Generally, a portion obtained by cutting one corner from a glass cube (a portion surrounded by a thick line in the drawing) is used as a corner cube. In the corner cube configured as described above, after the incident light is reflected once on each of the three surfaces, the reflected light accurately returns in the direction of the incident light.

For example, a corner cube having a side length c of 2 mm is radially arranged at the tip of a pen having a diameter of 10 mm. In addition, as shown in FIG. 14, when the corner cubes adjacent to each other are arranged in a reverse direction, 62
14 corner cubes.
With a step configuration, 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 position indicated by 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, on the coordinate input surface 41 of FIG.
Using the pen 45 shown in FIG. 14, an appropriate position (X, Y)
Is instructed. At this time, of the infrared light emitted from the LED 46 of the light emitting portion 42a of the light emission detecting device 42, the light emitted in the direction of the line segment p1 hits the pen 45, and the reflected light travels on the same line segment p1 in reverse, and the light receiving angle PSD of the detection unit 42b
The light is received at 48.

Similarly, the light emitting section 43a of the light emission detecting device 43
Out of the infrared light emitted from the LED 46, the light emitted in the direction of the line segment p2 hits the pen 45, and the reflected light travels in reverse on the same line segment p2, and is received by the PSD 48 of the light-receiving angle detection unit 43b. The light received by the PSD 48 depends on the incident angle with respect to the PSD 48 as shown in FIG.
Spot light is formed at different positions on the light receiving surface. Here, the line segment p2 forms an angle of θ2 from the line segment a2 bisecting the angle k2 of the coordinate input surface 41, and the line segment p1 is a line segment a1 bisecting the angle k1 of the coordinate input surface 41. From the angle θ1.

FIGS. 16A and 16B show the coordinate input surface 41.
A specific example of the positional relationship between the light receiving angle detection unit 42b and the cylindrical lens 49 and the PSD 48 is shown. Here, the light receiving surface of the PSD 48 is perpendicular to a line segment a1 that forms an angle of 45 ° with two sides of the coordinate input surface 41. That is,
A line segment a1 connecting the center of the cylindrical lens 49 and the center of the light receiving surface of the PSD 48 coincides with the light receiving optical axis and the light emitting optical axis. Also, the center of the cylindrical lens 49 and the PS
The distance from the center of the light receiving surface of D48 is L, and the length of the light receiving surface of PSD 48 is 2L.

Now, it is assumed that the reflected light from the pen 45 passes through the line segment p1 and is received at a position D1 away from the central position of the PSD 48. In addition, 2 of the light receiving surface of PSD 48
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
The current is obtained from the current values I ₁ and I ₂ obtained in D48.
Is calculated by By the way, in FIG. 16B, since the relationship of D1 / L = tan θ1 holds,
The incident angle θ1 of the reflected light is obtained from the following equation. θ1 = arctan (D1 / L)

Similarly, the other light emission detecting device 43
Also, assuming that the distance from the center of the PSD to the light receiving position is D2, the light receiving angle detecting unit 43b of
The incident angle θ2 of the reflected light is obtained. θ2 = arctan (D2 / L)

Further, the pointing position (X, Y) of the pen 45
Is a line segment a formed by the incident angles θ1 and θ2 of the two reflected lights.
Since it is the intersection of 1, a2, the indicated position (X, Y) is obtained from θ1, θ2 from the following equation. Y = X · tan (45 ° −θ2) Y = (AX) · tan (45 ° −θ1) Here, A is a horizontal length of the coordinate input surface 41 as shown in FIG. is there.

By solving the above simultaneous equations, the position coordinates (X, Y) on the coordinate input surface 41 specified by the pen 45 are obtained.
Is required. Note that (θ1, θ2) and (X, Y)
Is formulated, and if these formulas are programmed and stored in the ROM 65, the formulas can be easily obtained by the operation of the MPU 67. Further, the (X, Y) coordinate values, which are the calculation results, are transferred to a personal computer or the like via the interface driver 69, and can be used for processing such as displaying the position indicated by the pen 45 and inputting a command corresponding to the indicated position. .

In the above-described modification, an example in which two light emission detection devices are used has been described. However, if the LEDs of both devices are made to emit light at the same time, mutual infrared light may be detected by the PSD in the other device. Therefore, the LED 46 by the LED driver 64
It is preferable that the light emission control is alternately performed in a time-division manner, and the current detection of the PSD 48 is performed in synchronization with this.

For example, one LED emits light and the other LED emits light.
With the ED turned off, the PS corresponding to one LED
The current of D is detected, and after 10 msec, this LED is turned off and the other LED emits light.
Can be detected. That is, two LEDs alternately every 10 msec
Either one of them may emit light. This control is performed by the MPU 67 using the timer 68. By performing the time-sharing control of the LED light emission in this way, erroneous detection of infrared light is eliminated, and position detection can be sufficiently followed even when the pen 45 moves.

The coordinate input surface 41 has only to be a flat shape whose position can be indicated by the pen 45, and is not particularly limited to the square shape as shown in the modification of FIG. 7, but may be another shape. Absent. In the above-described modification, it is assumed that a flat plate is used as the coordinate input surface 41. However, the present invention is not limited to this, and a display device such as a C
An RT or LCD display screen may be used.

When a display screen of a CRT or LCD is used, it is preferable to use the above-mentioned infrared light emitting LED in order to eliminate the effect of display light being incident on the PSD 48 and being erroneously detected. It is preferable to use one that can detect the emission wavelength. Further, in order to prevent infrared rays generated from the CRT or the LCD from adversely affecting the coordinate detection, a PV
It is preferable to dispose an infrared cut filter made of C resin or the like on the display screen.

(Modification 3) Next, the principle of an information input / display device having an optical coordinate detecting device of Modification 3 will be described. Modification 3 uses a coordinate detection device using an infrared CCD camera as image input means. FIG. 17 is a block diagram showing a configuration of such a coordinate detection device. 71 is an infrared position detecting unit, 72a, 7
Reference numeral 2b denotes two infrared CCD cameras arranged in the infrared position detection unit 71, which are arranged at an interval of a distance L in the horizontal direction. Reference numeral 73 denotes an infrared LED, and reference numeral 74 denotes a pen-shaped coordinate input unit having an infrared LED 73 disposed at a tip thereof so as to emit infrared rays from the infrared LED 73 upward.

Reference numeral 75 denotes a control unit. Reference numeral 76 denotes an infrared position detection unit 71 generated by the control unit 75.
Is a reset signal inputted to the infrared CCD cameras 72a and 72b, 77 is a vertical clock signal for vertical scanning generated in the control unit 75 and inputted to the infrared CCD cameras 72a and 72b, and 78 is a control unit 75 The infrared CCD 72a generated in
The infrared CCD cameras 72a and 72b input a reset signal 76, a vertical clock signal 77, and a horizontal clock signal 7 to the infrared CCD cameras 72a and 72b.
In response to the input of No. 8, scanning in the X-Y direction is started.

79a and 79b are infrared CCD cameras 72
a and 72b are video signals output from the video signal 72a. 80 is a reset signal circuit for generating a reset signal 76;
Is a vertical clock circuit for generating a vertical clock signal 77, and 82 is a horizontal clock circuit for generating a horizontal clock signal 78. 83a and 83b are video signals 79a and 7
9b, the peak of the waveform is detected and the horizontal clock signal 7 is detected.
This is a peak detection circuit that generates a peak signal in accordance with a period of 8. 84a and 84b are the peak detection circuits 8
It is a peak detection signal obtained from 3a, 83b.

An arithmetic circuit 85 calculates a coordinate position. Reference numeral 86 denotes an interface circuit for transmitting the coordinate position calculated by the arithmetic circuit 85 to a computer (not shown). A display circuit 87 displays the coordinate position calculated by the arithmetic circuit 85.

Although not shown, when the pen-shaped coordinate input unit 74 is located outside the shooting range of the infrared position detecting unit 71, an operability is improved by providing an audio circuit unit for generating a warning sound and the like. Can be done. In addition, by providing a lens magnification adjustment circuit or a focal length adjustment circuit in the infrared CCD cameras 72a and 72b, 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 this modification, the control unit 75 is formed separately from the infrared position detecting unit 71. However, by miniaturizing each of the circuits described above, the control unit 75 and the infrared position detecting unit 71 are integrated. It is also possible.

The operation of the coordinate detecting device configured as described above will be described with reference to FIG. FIG. 18 is a timing chart showing a signal waveform of the coordinate detection device according to a modification of the present invention.

First, a reset signal 76, a vertical clock signal 77 and a horizontal clock signal 78 are simultaneously input to two infrared CCD cameras 72a and 72b. In response to these input signals, the infrared position detecting section 71 outputs video signals 79 from the two infrared CCD cameras 72a and 72b.
a and 79b are input to the control unit 75. When the pen-shaped coordinate input unit 74 is photographed with a normal infrared CCD camera, the pen itself is photographed.
When shooting with CD cameras 72a and 72b, infrared LED
Only the 73 light-emitting parts are photographed, and the other objects are not photographed and are black.

Therefore, each infrared CCD camera 7
Infrared LE is included in the video signals 79a and 79b of 2a and 72b.
A strong peak signal 88 corresponds to the position of D73.
a, 88b appear. Therefore, each peak signal 8
8a and 88b are detected by the peak detection circuits 83a and 83b, and are calculated as peak detection signals 84a and 84b by the arithmetic circuit 85.
Sent to.

In the arithmetic circuit 85, a conversion table (not shown) calculated in advance in a ROM (not shown) of the control unit 75 uses an infrared CCD camera 72.
Since it can be known how many angles the peak signals 88a and 88b appear at a and 72b from the origin serving as the reference of the infrared CCD cameras 72a and 72b, the two angle information and the two infrared CCD cameras 72a , 72b, the coordinate position of the pen-shaped coordinate input unit 74 can be calculated. The obtained coordinate position is transmitted to a computer or the like via the interface circuit 86 and displayed on a display screen (not shown) or the like.

A method of calculating the coordinate position of the coordinate detecting device that operates as described above will be described with reference to FIG. 2
The two infrared CCD cameras 72a and 72b detect peak detection signals 84a and 84b indicating the position of the pen-shaped coordinate input unit 74 having the infrared LED 73, and detect the position of the vertical clock signal 77 from the reset signal 76 and the horizontal clock. Infrared CCD camera 72 depending on the position of signal 78
a, 72b, two-dimensional coordinates (x1, y1), (x
2, y2) is required.

Here, the origin of each coordinate is appropriately determined, but here, the origin is set at the lower left corner of the photographing range of each of the infrared CCD cameras 72a and 72b. From now on, infrared CCD
The angles α and β from the origin of the infrared LED 73 in the cameras 72a and 72b can be obtained from the following equations. α = arctan (y1 / x1) β = arctan (y2 / x2)

From these equations, the pen angles α and β of the infrared LED 73 from the two infrared CCD cameras 72a and 72b can be calculated. Here, assuming that the position of one infrared CCD camera 72a is the origin and the distance between the two infrared CCD cameras 72a and 72b is L, the equations of the straight lines (a) and (b) are as shown in FIG. It is represented by an equation. (A) = (tan α) · x (b) = (tan (π−β)) · (x−L)

By solving these two simultaneous linear equations, the coordinate position of the pen-shaped coordinate input unit 74 of the infrared LED 73 can be calculated. Here, in order to increase the calculation speed of the calculation circuit 85, by providing a conversion table for calculating the coordinate position based on the angles α and β, the coordinate position can be obtained immediately, and input of a smooth figure or the like can be performed. it can.

As described above, according to such a coordinate detecting device using image input means such as an electronic camera, it is not necessary to place a tablet board or the like on a worktable, etc. 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. In addition, when a drawing or the like is described in the document, the shooting range can be variably set according to the size of the document by the lens magnification adjustment circuit unit and the resolution can be set, so that operability and convenience are improved. it can.

The principle of the optical coordinate detecting device or the coordinate detecting device using image input means such as a camera has been described above. However, these are examples relating to the coordinate detecting device, and the information inputting device of the present invention.・ Coordinate detection devices that can use the display device are not limited to these,
It is needless to say that the present invention can be applied to another optical coordinate detecting device or a coordinate detecting device using image input means such as a camera.

[0110]

As described above, according to the information input / display device of the first aspect, in the coordinate detection area formed by the plurality of light emitting means and the plurality of light receiving means, the information input / display device is provided in the optical path from the light emitting means to the light receiving means. A coordinate detecting device for detecting two-dimensional coordinates of a plane or a substantially plane depending on whether light is blocked or not, or image input means for capturing image information of a plane or substantially plane coordinate detection area, and an image captured by the image input means A coordinate detecting device having a conversion means for converting some image information of the information into two-dimensional coordinate information, and a display device for displaying information at a predetermined position based on the coordinates detected by the coordinate detecting device. Prepared,
The coordinate detection area of the coordinate detection device and the display area of the display device are disposed so as to overlap with each other, and a material posting section having adhesiveness or magnetic responsiveness is provided in the vicinity of the display area. It is possible to efficiently hold a conference while using the information input / display device.

The information input / display device of claim 2 is
A coordinate detection device that detects two-dimensional coordinates of a plane or substantially a plane by detecting whether light is blocked in an optical path from the light emitting unit to the light receiving unit in a coordinate detection region formed by the plurality of light emitting units and the plurality of light receiving units, Or
A coordinate detecting apparatus comprising: image input means for capturing image information of a plane or substantially planar coordinate detection area; and conversion means for converting some of the image information captured by the image input means into two-dimensional coordinate information. And a display device for displaying information at a predetermined position based on the coordinates detected by the coordinate detection device, wherein the coordinate detection region of the coordinate detection device and the display region of the display device are arranged so as to overlap. In addition, since a material posting section that can pierce the needle-shaped member is provided near the display area, it is possible to efficiently hold a meeting while using an information input / display device at a site such as a meeting.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an information input / display device according to a first embodiment of the present invention.

FIG. 2 is a view schematically showing an internal structure of a light receiving / emitting means.

FIG. 3 is a diagram illustrating a mechanism for detecting whether or not probe light has been blocked;

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 example in which one of right and left light receiving and emitting means described in FIGS. 1 and 2 is installed on a display surface.

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

FIG. 7 is a diagram showing a configuration of a modification of the coordinate detection device of the present invention.

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

FIG. 9 is a diagram showing a configuration of a modification of the light emission detection device of the present invention.

FIG. 10 is a diagram showing an arrangement of a cylindrical lens and a PSD of the present invention.

FIG. 11 is a diagram showing the arrangement of apertures and PSDs according to the present invention.

FIG. 12 is a diagram for explaining a state of condensing emitted light according to the present invention.

FIG. 13 is a block diagram showing a configuration of an LED and PSD control circuit of the present invention.

FIG. 14 is a diagram illustrating a modification of the shape of the tip of the pen according to the present invention.

FIG. 15 is a diagram illustrating the shape of a corner cube used for the tip of the pen according to the present invention.

FIG. 16 is a diagram showing a positional relationship between a cylindrical lens according to the present invention and a PSD.

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

FIG. 18 is a timing chart showing signal waveforms of a coordinate detection device according to a modification of the present invention.

FIG. 19 is a diagram illustrating a method of calculating a coordinate position.

FIG. 20 is an explanatory diagram showing a configuration of an information input / display device provided with an adhesive material posting section.

FIG. 21 is an explanatory diagram showing a configuration of an information input / display device provided with a material posting section having magnetic responsiveness.

FIG. 22 is an explanatory diagram showing a configuration of an information input / display device provided with a material posting portion capable of piercing a needle-shaped member.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light receiving / emitting means 2 indicating means 3 coordinate input area 4 retroreflective member 5 point light source 6 beam 7 retroreflected light 8 position 9,10 probe light 11 condensing lens 12 light receiving element 100 information input / display device 101 coordinate detecting device 102 Display device 103 Coordinate detection area 104 Display area 105a, 105b, 105c Data display section 106 Data 107 Magnet 108 Pin

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiromasa Shimizu 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (72) Inventor Sadao Takahashi 1-3-6 Nakamagome, Ota-ku, Tokyo Ricoh Co., Ltd. (72) Inventor Takuro Sekiya 1-3-6 Nakamagome, Ota-ku, Tokyo F-term in Ricoh Co., Ltd. 5B068 AA32 BB20 BC02 BC04 BE08 CD06 5B087 AA09 AE02 CC12 CC26 CC33 DG02

Claims (2)

[Claims] A plurality of light-emitting means and a plurality of light-receiving means, wherein a coordinate detection area formed by the light-emitting means and the light-receiving means determines whether light is blocked in an optical path from the light-emitting means to the light-receiving means. A coordinate detecting device for detecting two-dimensional coordinates of a plane or a substantially plane, or image input means for capturing image information of a plane or substantially plane coordinate detection area, and a part of the image information captured by the image input means A coordinate detecting device having a converting means for converting the image information into two-dimensional coordinate information; and a display device for displaying information at a predetermined position based on the coordinates detected by the coordinate detecting device. An information input / display device in which the coordinate detection region of the display device and the display region of the display device are arranged so as to overlap with each other, Other information input and display device, characterized in that a document posting portion having a magnetic force responsive. 2. A light emitting device comprising: a plurality of light emitting means and a plurality of light receiving means; and in a coordinate detection area formed by the light emitting means and the light receiving means, whether or not light is blocked in an optical path from the light emitting means to the light receiving means. A coordinate detecting device for detecting two-dimensional coordinates of a plane or a substantially plane, or image input means for capturing image information of a plane or substantially plane coordinate detection area, and a part of the image information captured by the image input means A coordinate detecting device having a converting means for converting the image information into two-dimensional coordinate information; and a display device for displaying information at a predetermined position based on the coordinates detected by the coordinate detecting device. An information input / display device in which a coordinate detection region of the display device and a display region of the display device are arranged to overlap each other, wherein a needle-shaped portion is provided near the display region. Information input and display device, characterized in that a document posting portion capable of piercing the.