JP5487865B2 - Information processing device - Google Patents

Description

  The present invention relates to an information processing apparatus such as a personal computer having a touch panel on a display screen.

  As a touch panel mounted on a display provided in an information processing apparatus such as a personal computer, various detection principles such as an infrared method, a capacitance method, and a resistance film method have been put into practical use. Infrared touch panels are often used for relatively large displays because of the low cost of increasing the detection range compared to other detection principles.

  The infrared touch panel is irradiated with infrared rays along the screen of the display, detects the blocking of infrared rays by a shielding object such as a user's finger indicating the screen, and determines the position of the shielding object on the screen. . As an infrared touch panel, there is an infrared reflective touch panel that uses infrared reflection.

  In an infrared reflective touch panel, a detector that performs irradiation and detection of infrared rays and a reflective member that reflects infrared rays are provided. Two detectors are usually used and are arranged at two corners of the screen, respectively. Each detector includes a light emitting unit that emits infrared light and a light receiving unit that receives infrared light. The infrared light emitted from the light emitting unit is periodically changed in the optical axis direction by the scanning mechanism, and is projected in a predetermined angle range (for example, 90 degree range). The reflecting member is arranged at a position along the three sides of the screen, which is a position corresponding to the range of infrared light projected from the two detectors.

  The reflecting member has re-reflectivity (characteristic that reflects incident light in the same direction as the incident direction), and reflects incident infrared rays toward the detector. The light receiving unit of the detector outputs an electrical signal corresponding to the intensity of the received infrared light. In the infrared reflective touch panel, the position (coordinates) of the shielding object on the screen is determined using two signals output from the light receiving units of the two detectors. That is, if there is a shield on the screen, the infrared ray is blocked by the shield, so the signal level corresponding to the amount of reflected infrared light obtained from the light receiving unit decreases, and at this point, the scan for each detector is performed. Based on the two scanning angle information obtained from the mechanism, the position (coordinates) of the shielding object on the screen is determined.

  As a known technique using such an infrared reflective touch panel, for example, a light recursive reflector provided on the side of a CRT and a scanning optical handset facing the light recursive reflector are provided. There is a coordinate input device provided (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2007-72501 (paragraph [0043], FIG. 1)

  However, the coordinate input device according to Patent Document 1 has a configuration in which the light recursive reflector is exposed around the screen. Due to the property that a wave-like pattern appears on the surface of the light-returning reflector or its own color tone is limited, the light-returning reflector is exposed around the display screen like the device described in Patent Document 1. If the design is adopted, the appearance may be impaired. Moreover, there is a possibility that the detection accuracy of the indicated coordinates may be lowered due to the exposed or retroreflective reflector being soiled or damaged.

  In view of the circumstances as described above, an object of the present invention is to provide an information processing apparatus capable of preventing deterioration of appearance due to a reflecting member, protecting the reflecting member, and improving the strength of the bezel of the display screen. There is to do.

In order to achieve the above object, an information processing apparatus according to an embodiment of the present invention includes a display unit, a plurality of detectors, a coordinate detection unit, a reflecting member, and a bezel.
The display unit has a display screen.
The detectors are provided at a plurality of positions separated at the periphery of the display screen, respectively, scan light of a predetermined wavelength band including an invisible region along the display screen, and reflect the reflected light of the light. To detect.
The coordinate detection unit detects coordinates instructed on the display screen based on detection results of the plurality of detectors.
The reflection member is selectively disposed along the periphery of the display screen and has retroreflectivity that reflects the light from the detection unit.
The bezel is a bezel made of a selectively transmissive material that limits the amount of transmission of light in the visible region, and blocks the first portion that decoratively surrounds the display screen, the detector, and the reflecting member. And a second portion extending from the first portion.

  In the present invention, it is possible to transmit and receive light between the detector and the reflecting member by the second portion of the bezel made of a selectively transmissive material that restricts the amount of light transmitted in the visible region, while displaying the reflecting member. Can prevent adverse effects on the appearance of the information processing apparatus. Further, it is possible to prevent the coordinate detection accuracy from being lowered due to the reflecting member becoming dirty or damaged, and further, it is possible to improve the strength of the bezel by extending the second part to the first part. is there.

The reflection member may be fixed to a support member provided at a peripheral portion of the display screen.
According to this configuration, the reflecting member can be supported by the supporting member. Since the bezel and the reflecting member are supported independently, even if the bezel is deformed by external force or heat, the reflection of the light by the reflecting member is not affected, and the position of the shielding object can be accurately detected. It is.

The reflective member may be fixed to the second part of the bezel.
According to this configuration, since the reflecting member is directly fixed to the second portion of the bezel, the influence of light refraction by the air layer can be reduced. In addition, the optical path length can be shortened and light attenuation can be suppressed as compared with the case where a gap exists between the reflecting member and the second portion of the bezel. Furthermore, the bezel can be downsized as compared with the case where the reflecting member is fixed to the support member.

The reflective member may be fixed to the bezel with an adhesive having light transmittance.
According to this configuration, it is possible to suppress light attenuation by the adhesive. The reflective member may be fixed to the bezel with an adhesive having light transmittance. According to this configuration,

The information processing apparatus may further include a receiving unit capable of receiving an optical signal from a remote controller, and the first part of the bezel may be configured to cover the receiving unit.
According to this configuration, the bezel can be used as a cover of the receiving unit. Since the bezel restricts the amount of light transmitted in the visible light region, it can be used as a cover for the receiving unit. For this reason, it is not necessary to provide another component as the operation signal light receiving unit, the bezel can be designed seamlessly, and the number of components can be reduced.

  As described above, according to the object of the present invention, it is possible to provide an information processing apparatus that can prevent deterioration of the appearance due to the reflecting member, protect the reflecting member, and improve the strength of the bezel of the display screen. Is possible.

It is a top view which shows the external appearance of the information processing apparatus which concerns on 1st Embodiment. It is a top view which shows the state which removed the bezel from the information processing apparatus. It is a perspective view which shows the detail of a detector. It is a block diagram which shows the structure of a coordinate detection part. It is sectional drawing which shows arrangement | positioning of a bezel. It is a schematic diagram explaining a detection operation. It is a graph which shows a receiver gain. It is a graph which shows the spectral transmission factor of a selectively permeable material. It is sectional drawing which shows arrangement | positioning of the bezel of the information processing apparatus which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
An information processing apparatus 1 according to a first embodiment of the present invention will be described.

<Configuration of information processing apparatus>
FIG. 1 is a plan view showing an appearance of the information processing apparatus 1 according to the first embodiment.
FIG. 2 is a plan view showing a state in which the bezel 3 is removed from the information processing apparatus 1.

  As shown in these drawings, the information processing apparatus 1 includes a support portion 10 and a main body portion 15. The support portion 10 is provided below the main body portion 15 and supports the main body portion 15. The support unit 10 has a space and is configured to accommodate a keyboard or the like. In addition, the information processing apparatus 1 includes a stand 11 provided on the back side thereof.

  The main body unit 15 includes a display screen 2, a bezel 3, a housing 4, a reflecting member 5, and a detector 6. One direction parallel to the surface of the display screen 2 is defined as an X direction, a direction parallel to the surface of the display screen 2 and perpendicular to the X direction is defined as a Y direction, and a direction perpendicular to the X direction and the Y direction is defined as a Z direction. That is, the display screen 2 is a plane parallel to the XY plane. The side where the display screen 2 of the information processing apparatus 1 appears in FIG. 1 is the front side of the information processing apparatus 1, and the opposite side is the back side of the information processing apparatus 1.

  The housing 4 accommodates various devices constituting the display and other information processing apparatuses. The display screen 2 is a surface for displaying an image on the display (display unit). As the display, for example, an LCD (Liquid Crystal Display), a CR (Cathode Ray Tube), or the like is used. The display screen 2 is also a surface designated (pointed) by the user. Although the display screen 2 of the information processing apparatus 1 according to the present embodiment is rectangular, the display screen 2 is not limited thereto. Regarding the four sides of the display screen 2, one side is defined as a first side 2a, and a side facing the first side 2a is defined as a second side 2b. One of the other two sides is a third side 2c, and the other is a fourth side 2d.

The bezel 3 is a frame that decoratively surrounds the four sides around the display screen 2.
FIG. 5 is a cross-sectional view showing the arrangement of the bezel 3. The bezel 3 includes a first part 3 a facing the front side of the information processing apparatus 1 and a second part 3 b extending from the first part 3 a so as to block the detector 6 and the reflecting member 5. As shown in FIG. 5, the first portion 3 a of the bezel 3 faces the front side of the information processing apparatus 1 and is supported by the housing 4. The second part 3b extends from the display screen 2 side of the first part 3a. Of the four sides of the display screen 2, the second part 3 b is provided along a side where a reflection member 5 described later is provided, that is, along the first side 2 a, the second side 2 b, and the third side 2 c. Is provided. The 1st site | part 3a shall have thickness of 2.0 mm or more and 3.0 mm or less, for example. Moreover, the 2nd site | part 3b shall have thickness of 0.5 mm or more and 2.0 mm or less, for example.

  The bezel 3 is made of a selectively permeable material. The selectively transmissive material is a material whose light transmittance varies depending on the wavelength. The selective permeability of the material constituting the bezel 3 transmits light in the wavelength band projected by the detector 6 and limits the amount of light transmitted in the visible light region. For example, the detector 6 can project infrared light having a wavelength of 850 nm, and the material of the bezel 3 can be a selectively transmissive material that selectively transmits infrared light having the wavelength of 850 nm. It is.

  FIG. 8 is an example of spectral transmittance data of a specific selectively transmissive material that can be used for the bezel 3. This spectral transmittance data is measured for the bezel 3 in which the thickness of the second portion 3b is 2.0 mm. As shown in the figure, this selectively transmissive material can limit the transmission of light in the visible light wavelength band having a wavelength of about 700 nm or less, and can selectively transmit light in the wavelength band of 700 nm or more. is there.

  As shown in FIG. 2, the information processing apparatus 1 is provided with a receiving unit 12. The receiving unit 12 receives an optical signal for operating the information processing apparatus 1 from the outside with a remote controller. The optical signal is a blinking signal of light in an invisible region such as infrared rays, and is converted into an electric signal by the receiving unit 12. The receiving unit 12 needs to be covered with a cover that blocks visible light in order to prevent malfunction of the receiving unit 12 due to visible light. Here, since the bezel 3 is made of a material that limits the amount of light transmitted in the visible light region, the first portion 3 a of the bezel 3 can be used as a cover of the receiving unit 12.

  Returning to FIGS. 1 and 2, the reflecting member 5 has retroreflectivity, and reflects the light emitted from the detector 6. Retroreflectivity is a property of reflecting incident light in the same direction as the incident direction. The reflective member 5 is provided along three sides of the four sides of the display screen 2. In the present embodiment, the reflecting member 5 is provided along the first side 2a, the second side 2b, and the third side 2c. Of the reflecting member 5, the portion along the first side 2a is the first portion 5a, the portion along the second side 2b is the second portion 5b, and the portion along the third side 2c is the third portion 5c. And The reflecting member 5 has a belt-like shape, and is formed on a support member 9 (see FIGS. 3 and 5) arranged along the first side 2 a, the second side 2 b, and the third side 2 c on the four sides around the display screen 2. It is attached. For example, the support member 9 is provided on the front side of a protective panel or the like disposed on the forefront of the display screen 2. The support member 9 has an inner wall surface 9a along a direction including a component orthogonal to the display screen 2, and the reflecting member 5 is supported by the inner wall surface 9a.

  As described above, the support member 9 is provided on the forefront of the display screen 2, and the front side of the support member 9 is covered with the bezel 3 and apparently accommodated in the bezel 3. If the positional relationship between the support member 9 and the bezel 3 is further described, a gap is secured between the front end portion of the support member 9 and the back side surface of the bezel 3. For this reason, even when the bezel 3 is deformed by an external force or heat, the risk of affecting the reflecting member 5 is reduced.

The detector 6 projects light along the display screen 2 and detects the light reflected by the reflecting member 5. In this information processing apparatus 1, two detectors 6 are used. For example, the two detectors 6 are arranged in the upper left corner and the upper right corner of the display screen 2. That is, the two detectors 6 have corner portions between the side where the reflecting member 5 is not provided and the other side adjacent to the side, that is, the corners of the first side 2a and the fourth side 2d. It is provided at the corner of the portion and the second side 2b and the fourth side 2d. Hereinafter, the detector 6 provided at the corner of the first side 2a and the fourth side 2d (upper right corner of the display screen 2) is referred to as a “first detector 6R”, and the second side 2b and the fourth side The detector 6 provided at the corner of the side 2d (the upper left corner of the display screen 2) is referred to as a “second detector 6L”. Details of the structure of the detector 6 will be described later.
The positions of the two detectors 6 are not necessarily limited to the corner portions of the display screen 2. For example, what is necessary is just to arrange | position in the position mutually spaced apart in the 4th edge | side 2d.

  FIG. 3 is a perspective view showing details of the detector 6. FIG. 3 shows the first detector 6R arranged at the upper right corner of the display screen 2, but the second detector 6L has the same configuration. As shown in the figure, the first detector 6R includes an emitter 6Ra and a receiver 6Rb.

  The emitter 6Ra projects light along the display screen 2. The emitter 6Ra includes a light source, an optical system that converges light emitted from the light source, and a scanning mechanism that scans the light converged by the optical system. The light source is an LED (Light Emitting Diode), LD (laser diode), or the like, and generates light having a wavelength in an invisible region (infrared region or ultraviolet region). The optical system is a lens or the like. The scanning mechanism is a galvano scanner, a polygon scanner, or the like, and is configured to scan incident light within a predetermined range.

  The emitter 6Ra projects light onto the reflecting member 5 while periodically changing the direction of the light axis by a scanning mechanism within a predetermined angular range (for example, 90 degrees). Specifically, in FIGS. 2 and 6, the emitter 6Ra mounted on the first detector 6R scans the second portion 5b and the third portion 5c of the reflecting member 5 with light. The emitter 6La of the second detector 6L scans the first portion 5a and the third portion 5c of the reflecting member 5 with light.

  The receiver 6Rb receives the light emitted from the emitter 6Ra mounted on the same detector 6 and returning from the reflecting member 5, and outputs an electric signal corresponding to the intensity of the light. The output of the receiver 6Rb is transmitted to the coordinate detector 7 described later.

  In this embodiment, as shown in FIG. 3, two receivers 6Rb and 6Rb are arranged on both sides of the emitter 6Ra in one first detector 6R so as to supplement the detectable range.

FIG. 4 is a block diagram showing the configuration of the coordinate detection unit 7.
The information processing apparatus 1 includes a coordinate detection unit 7 that detects coordinates instructed on the display screen 2 based on detection results obtained by the two detectors 6.

  As shown in the figure, the coordinate detection unit 7 includes a drive circuit 71 (drive circuit 71R, drive circuit 71L), an amplification circuit 72 (amplification circuit 72R, amplification circuit 72L), a scanning mechanism control circuit 73, and an angle detection circuit 74 ( An angle detection circuit 74R, an angle detection circuit 74L), and an arithmetic circuit 75. Here, a circuit with a symbol R is a circuit corresponding to the system of the first detector 6R, and a circuit with a symbol L is a circuit corresponding to the system of the second detector 6L. .

The drive circuit 71R supplies a drive current to the light source of the emitter 6Ra. Similarly, the drive circuit 71L supplies a drive current to the light source of the emitter 6La.
The amplifier circuit 72R amplifies the output of the receiver 6Rb and outputs it to the angle detection circuit 74R. Similarly, the amplifier circuit 72L amplifies the output of the receiver 6Lb and outputs it to the angle detection circuit 74R.
The scanning mechanism control circuit 73 controls the scanning mechanisms in the emitter 6Ra and the emitter 6La.

  The angle detection circuit 74R detects the timing when the output of the amplified receiver 6Rb, which is the output of the amplification circuit 72R, is the lowest, based on the scanning timing reference signal supplied from the scanning mechanism control circuit 73, and detects the detected timing. Replace with angle information and output. Here, the scanning timing reference signal supplied from the scanning mechanism control circuit 73 is, for example, a signal output from the scanning mechanism control circuit 73 to the angle detection circuit 74R when the scanning angle of the scanning mechanism is 0 degrees. . The angle detection circuit 74R obtains a difference between the timing at which the scanning timing reference signal is input and the timing at which the output of the receiver 6Rb is the lowest, and replaces this difference with angle information. That is, when the scanning angle of the scanning mechanism is 0 degree and the light axis is set to be parallel to the first side 2a of the display screen 2, the coordinates specified by the user on the display screen 2 and the first The angle formed by the straight line connecting the first detector 6R and the first side 2a (straight line) of the display screen 2 is obtained as the first angle information. Then, the angle detection circuit 74R outputs the obtained angle information to the arithmetic circuit 75. Similarly to the angle detection circuit 74R, the angle detection circuit 74L also uses the scanning timing reference signal supplied from the scanning mechanism control circuit 73 at the timing when the output of the amplified receiver 6Lb, which is the output of the amplification circuit 72L, has decreased most. And the detected timing is replaced with the second angle information and output to the arithmetic circuit 75. The angle obtained in this way is an angle formed by the straight line connecting the coordinates designated by the user on the display screen 2 and the second detector 6L and the second side 2b (straight line) of the display screen 2.

  The arithmetic circuit 75 detects the coordinates designated by the user on the display screen 2 based on the two angle information input from the angle detection circuit 74R and the angle detection circuit 74L.

<Coordinate detection operation>
An operation of coordinate detection by the information processing apparatus 1 configured as described above will be described.
FIG. 6 is a schematic diagram for explaining the operation of coordinate detection.

  When a shielding object S such as a user's finger or stylus pen contacts (approaches) on the display screen 2, the coordinates of the contacted position are the first detector 6R and the second detector as shown below. 6L and the coordinate detection unit 7.

First, the operation of the first detector 6R will be described.
A drive current is supplied from the drive circuit 71R to the light source of the emitter 6Ra, light having a specific wavelength is emitted from the emitter 6Ra, and a control signal is supplied from the scanning mechanism control circuit 73 to the scanning mechanism of the emitter 6Ra. As a result, the scanning mechanism is driven, and the light emitted from the light source is scanned.

  The light emitted from the emitter 6Ra and passed on the display screen 2 passes through the second portion 3b of the bezel 3 made of a selectively transmissive material, reaches the reflecting member 5, and is reflected by the reflecting member 5. Here, since the reflecting member 5 has retroreflectivity, the light incident on the reflecting member 5 is reflected toward the incident direction, that is, the direction of the first detector 6R. The light reflected by the reflecting member 5 passes through the second portion 3 b of the bezel 3 and reaches the detector 6.

  When there is a shield S that indicates a certain position on the display screen 2, the light irradiated toward the shield S among the light scanned by the emitter 6 Ra is blocked by the shield S. For this reason, when light does not reach the reflecting member 5, the amount of light received by the receiver 6Rb decreases. Accordingly, at this time, the output of the amplifier circuit 72R also decreases, and the angle detection circuit 74R causes the first detection timing based on the difference between the output reduction timing and the timing of the scanning timing reference signal supplied from the scanning mechanism control circuit 73. Angle information is obtained. The angle detected by the angle detection circuit 74R is defined as θR.

  The second angle information can be obtained by performing the same operation as the first detector 6R in the second detector 6L. This angle is defined as θL.

  The arithmetic circuit 75 obtains the coordinates of the position of the shielding object S on the display screen 2 from the angle θR output from the angle detection circuit 74R and the angle θL output from the angle detection circuit 74L.

  As described above, although the reflecting member 5 is hidden by the second portion 3b of the bezel 3, since the bezel 3 is made of a selectively transmissive material, light is exchanged between the detector 6 and the reflecting member 5. Will not be disturbed. In addition, since the amount of visible light transmitted is limited by the bezel 3, the reflective member 5 is not seen by the user.

<Receiver gain adjustment>
Depending on the size of the gap between the reflecting member 5 and the second portion 3b of the bezel 3, the surface state of the bezel 3, the molding state (molding unevenness, etc.), a difference in the light transmittance between the portions may occur. . Therefore, this problem is solved by adjusting the gain of the receiver.

FIG. 7 is a graph showing an example of the output of the receiver.
7A shows the output distribution of the receiver when the reflective member 5 is not covered with the bezel 3 made of a selectively transmissive material, and FIG. 7B shows the receiver output when the reflective member 5 is covered with the bezel 3. The output distribution is shown. In the figure, the solid line plot shows the output of one receiver 6Rb, and the broken line plot shows the output of the other receiver 6Lb. The horizontal axis of the graph is the angle of light, and the vertical axis is the output of the receiver.

  Comparing FIG. 7A and FIG. 7B, both outputs of the receivers 6Rb and 6Lb are attenuated in the vicinity of the angle region indicated by W1 in the figure, which is considered to be due to a decrease in the light transmittance of the bezel 3. . Therefore, an angle range in which the outputs of both receivers 6Rb and 6Lb are reduced below the threshold is examined, and in this angle range, the amplification factors (gains) of the amplifier circuits 72R and 72L with respect to the outputs of both receivers 6Rb and 6Lb are increased. It is desirable to configure. For example, when the information processing apparatus 1 is started up, the control unit drives the detector 6 and the coordinate detection unit 7 according to the program, examines the angle range in which the outputs of the receivers 6Rb and 6Lb are lower than the threshold value, and stores the result in the memory. Store. Thereafter, in the actual coordinate detection, the control unit sets the angle range stored in the memory, and the amplification factors (gains) of the amplifier circuits 72R and 72L with respect to the outputs of the receivers 6Rb and 6Lb can be determined in advance in this angle range. Increase the adjustment value.

As described above, according to the information processing apparatus 1 of the present embodiment, the following effects can be obtained.
In the information processing apparatus 1, light can be transmitted and received between the detector 6 and the reflecting member 5 by the second portion 3 b of the bezel 3 made of a selectively transmissive material that limits the amount of light transmitted in the visible region. Further, it is possible to prevent an adverse effect on the appearance of the information processing apparatus 1 due to the reflection member 5 being exposed. Further, it is possible to prevent a decrease in coordinate detection accuracy caused by the reflecting member 5 being soiled or damaged, and further, the strength of the bezel can be improved by extending the second portion 3b to the first portion 3a. Is possible.

  Further, since the bezel 3 and the reflecting member 5 are supported independently, even if the bezel 3 is deformed by an external force or heat, the reflection of the light by the reflecting member 5 is not affected, and the position of the shield S is detected. Can be performed with high accuracy.

  Further, the bezel 3 is integrally formed with a first part 3a facing the front side of the information processing apparatus 1 and a second part 3b covering the reflecting member 5, so that the entry of dust and the like is prevented, and the design is made. It is possible to improve the property. In addition, the thickness of the second portion 3b can be reduced while maintaining the strength, and the attenuation of light by the second portion 3b can be reduced. Furthermore, by forming the first part 3a and the second part 3b integrally, it is possible to suppress the number of parts and reduce the man-hours when the information processing apparatus 1 is assembled.

(Second Embodiment)
An information processing apparatus 20 according to the second embodiment of the present invention will be described.
The same components as those of the information processing apparatus 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The information processing apparatus 20 is different from the information processing apparatus 1 according to the first embodiment in the attachment method of the reflecting member 5.
FIG. 10 is a cross-sectional view showing the arrangement of the bezel 3.

  As shown in the figure, the first portion 3 a of the bezel 3 faces the front side of the information processing apparatus 1 and is supported by the housing 4. The second part 3b extends from the display screen 2 side of the first part 3a. The second part 3b is provided along the side where the reflecting member 5 is provided, that is, the first side 2a, the second side 2b, and the third side 2c. The bezel 3 can be formed by integrally molding a selectively permeable material. The reflection member 5 is attached to the back side 3 c of the second portion 3 b of the bezel 3.

  The reflecting member 5 is affixed to the second portion 3b with an adhesive. Here, by making this adhesive have light-transmitting properties, attenuation of light by the adhesive can be suppressed, and the accuracy of position detection of the shielding object S can be improved.

  By directly fixing the reflecting member 5 to the second portion 3b of the bezel 3, it is possible to reduce the influence of light refraction by the air layer. Moreover, compared with the case where a clearance gap exists between the reflective member 5 and the 2nd site | part 3b of the bezel 3, optical path length can be shortened and attenuation | damping of light can be suppressed. Furthermore, it is possible to reduce the size of the bezel 3 as compared with the case where the reflecting member 5 is fixed to the support member 9.

  The present invention is not limited only to the above-described embodiment, and can be changed within a range not departing from the gist of the present invention.

  In each of the above embodiments, the information processing apparatus is provided with two detectors, but the number of detectors is not limited to two. By arranging a larger number of detectors, it is possible to improve the position detection accuracy of the indicator.

DESCRIPTION OF SYMBOLS 1 Information processing apparatus 2 Display screen 3 Bezel 3a 1st site | part 3b 2nd site | part 5 Reflective member 6 Detector 6R 1st detector 6L 2nd detector 7 Coordinate detection part 9 Supporting member 12 Reception part 20 Information processing apparatus

Claims (5)

A display unit having a display screen;
Provided at a plurality of positions separated from each other at the periphery of the display screen, and scans the emitted light having a predetermined wavelength band including the invisible region along the display screen, and detects the reflected light of the emitted light. Multiple detectors;
A reflective member selectively disposed along the periphery of the display screen and having retroreflectivity to reflect the emitted light as the reflected light ;
A bezel made of a selectively transmissive material that limits the amount of light transmitted in the visible region, wherein the first portion that decoratively surrounds the display screen, the detector, and the reflecting member are shielded. A bezel having a second portion extending from one portion ;
A coordinate detection unit that detects coordinates instructed on the display screen based on detection results of the plurality of detectors, wherein the reflected light generated by the second part according to a scanning angle of the emitted light; An information processing apparatus comprising a coordinate detection unit that corrects attenuation . The information processing apparatus according to claim 1,
The reflection member is fixed to a support member provided at a peripheral portion of the display screen. The information processing apparatus according to claim 1,
The reflection member is fixed to the second part of the bezel. The information processing apparatus according to claim 3,
The reflection member is fixed to the bezel with an optically transmissive adhesive. The information processing apparatus according to claim 4,
The information processing apparatus further includes a receiving unit capable of receiving an optical signal from a remote controller,
The first part of the bezel covers the receiving unit.

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