WO2000058820A1 - Ecran tactile pour lecture optique - Google Patents

Ecran tactile pour lecture optique Download PDF

Info

Publication number
WO2000058820A1
WO2000058820A1 PCT/JP1999/006528 JP9906528W WO0058820A1 WO 2000058820 A1 WO2000058820 A1 WO 2000058820A1 JP 9906528 W JP9906528 W JP 9906528W WO 0058820 A1 WO0058820 A1 WO 0058820A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
optical
scanning
touch panel
reflected
Prior art date
Application number
PCT/JP1999/006528
Other languages
English (en)
Japanese (ja)
Inventor
Yasuhide Iwamoto
Satoshi Sano
Fumihiko Nakazawa
Nobuyasu Yamaguchi
Original Assignee
Fujitsu Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Limited filed Critical Fujitsu Limited
Publication of WO2000058820A1 publication Critical patent/WO2000058820A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • G06F3/0423—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen using sweeping light beams, e.g. using rotating or vibrating mirror

Definitions

  • the present invention relates to an optical scanning touch panel that optically detects the position of an indicator on a display screen.
  • a human finger or a specific indicator is displayed on the display screen of a display device on which information is displayed by the computer system.
  • Devices that input new information or give various instructions to a computer system by giving instructions are used.
  • the angle of the finger or pen is determined from the mining, and the position coordinates are detected from the obtained angle by the principle of triangulation.
  • the number of parts is small, the detection accuracy can be maintained, and the position of a finger, an arbitrary pen, etc. can be detected.
  • An optical scanning type touch panel that performs position detection by using such scanning light generally includes a retroreflector provided outside the display screen, a light emitting element that emits light such as laser light, and a light emitting element that emits light.
  • Polygon scanning angle scan And a plurality of optical units including a light receiving element for receiving the light reflected by the retroreflector of the scanning light, and the light from the light emitting element is transmitted to each optical unit.
  • the light is scanned by the optical scanning unit.
  • the light reflected by the retroreflector of the scanning light is reflected again by the optical scanning unit, and the reflected light is received by the light receiving element.
  • the position of the pointing object can be detected.
  • an optical scanning type touch panel for example, when dust adheres to an optical scanning section such as a polygon mirror, the reflectance is deteriorated, the S / N ratio is reduced, and the accurate position of the indicator is determined. It cannot be detected. Also, not only the polygon mirror but also other optical members in the optical unit need to prevent external dust from adhering so that the characteristics are not deteriorated. However, in the conventional optical scanning type touch panel, no consideration is given to preventing this dust adhesion.
  • An object of the present invention is to provide an optical scanning type touch panel capable of detecting a position of an indicator accurately while suppressing deterioration of characteristics of members. Disclosure of the invention
  • An optical scanning type touch panel includes a light retroreflector provided outside a predetermined area, an optical scanning section for angularly scanning light in a plane substantially parallel to the predetermined area, and an optical scanning section. Anti-reflection of scanning light at the light retroreflector
  • the optical unit has a dust-proof structure having an optical opening surface in the scanning light area.
  • the optical unit has a dustproof structure, so that external dust does not enter the optical unit and adhere to the internal optical members. Therefore, characteristic deterioration of the optical member due to dust adhesion is suppressed, a stable operation for detecting the position of the pointer is performed, and an accurate position of the pointer can be detected.
  • the normal direction of the optical aperture surface is substantially equal to the direction of the scanning light at which the amount of reflected light is minimized.
  • the reflected light from the retroreflector with the minimum light quantity is incident on the optical aperture surface almost perpendicularly. Therefore, the reflected light with the minimum light amount can be efficiently received, and the detection accuracy can be improved.
  • a normal line of the optical aperture surface is inclined with respect to an optical axis of the scanning light.
  • the normal to the optical aperture is inclined with respect to the optical axis of the scanning light, and the scanning light emitted from the optical unit is specularly reflected at the optical aperture.
  • the inclination angle of a normal to the optical axis of the scanning light is less than half the viewing angle of the light receiving unit.
  • the inclination angle of the normal to the optical aperture surface with respect to the optical axis of the scanning light is larger than half the viewing angle of the light receiving section, and the viewing angle is limited for the light receiving section. Even if you go there, Does not interfere.
  • FIG. 1 is a schematic diagram showing a basic configuration of an optical scanning type touch panel of the present invention
  • FIG. 2 is a perspective view showing an optical system configuration and an optical path in an optical unit
  • FIG. 3 is a dustproof structure in the optical unit.
  • Sectional view Fig. 4 is a side view showing the dustproof structure in the optical unit
  • Fig. 5 is a sectional view showing the process of mounting the dustproof structure
  • Fig. 6 is a sectional view showing the state of attachment of the dustproof structure
  • Fig. 7 The figure is a schematic diagram showing the relationship between the scanning light and the incident angle with respect to the display screen
  • FIG. 8 is a graph showing the relationship between the incident angle and the transmittance in the visible light power filter
  • FIG. 9 is a diagram showing the relationship between the polygon mirror and the polygon mirror.
  • a diagram showing the positional relationship with the optical aperture surface
  • FIG. 10 is a diagram showing the relationship between the optical distances
  • FIG. 1i is a diagram showing the magnitude of the viewing angle
  • FIG. 12 is a dustproof structure in the optical unit.
  • FIG. 13 is a cross-sectional view showing a curved surface portion of the optical system.
  • FIG. 14 is a configuration diagram of another example of an optical unit with noise light countermeasures.
  • FIG. 15 is a schematic diagram showing an implementation state of an optical scanning type touch panel.
  • Fig. 16 is a schematic diagram showing the principle of triangulation for coordinate detection
  • Fig. 17 is a schematic diagram showing an indicator and a cut-off range
  • Timing chart shown-Fig. 19 is a schematic diagram showing the principle of measuring the diameter of the cross section of the pointer.
  • FIG. 1 is a schematic diagram showing a basic configuration of an optical scanning type touch panel of the present invention.
  • reference numeral 10 denotes a power supply of a personal computer or the like.
  • This is a rectangular display screen such as a CRT or flat display, “nel” (PD ⁇ , LCD, EL, etc.) in a slave device, a projection type video display device, etc.
  • a display screen of a PDP (brass display) It is configured as
  • one short side of this rectangular display screen 10 which is a range of a plane defined as a target area for touching with an indicator S such as a finger or a pen
  • the right side of Optical units 1a and 1b each having an optical system including a light-emitting element, a light-receiving element, a polygon mirror, various types of lenses, and the like are provided outside the two corners of each side.
  • Each of the optical units 1a and 1b is provided with a dustproof structure for preventing dust from entering from outside and preventing dust from adhering to the internal optical system. This dustproof structure will be described later in detail.
  • a retroreflective sheet 7 as a retroreflector is provided on three sides except the right side of the display screen 10, that is, outside the upper and lower sides and the left side. .
  • FIG. 2 is a perspective view showing an optical system configuration and an optical path in the optical unit 1a, lb. Both optical units 1a and 1b have the same optical system.
  • the optical units la and lb are a light emitting element 11 composed of a laser diode (LD) that emits infrared laser light and a collimator for converting laser light from the light emitting element 11 into parallel light. And a photo diode (PD) 13 for receiving light reflected from the retroreflective sheet 7 and a slit for limiting light incident on the light receiving element 13.
  • LD laser diode
  • PD photo diode
  • a slit plate 14 having 14 a, a polygon mirror 15 having, for example, a quadrangular prism shape for angularly scanning a laser beam from the light emitting element 11, and an aperture 16 a are used to collimate.
  • the light reflected from the retroreflective sheet 7 via the polygon mirror 15 is received by the light receiving element 13.
  • An optical unit main body 19 for mounting and fixing each optical member is provided.
  • Figures 3 and 4 are a cross-sectional view and a side view showing the dustproof structure of each optical unit 1a, 1b.
  • a dustproof cover 20 is provided in the optical units 1a and 1b so as to cover the above-described optical system.
  • the dust cover 20 is made of steel in which an inner surface covering the optical system is subjected to a non-reflection treatment. This anti-reflection treatment is applied to prevent the reflected light on the inner surface of the dust cover 20 from becoming noise light.
  • the emission area of the scanning light from the polygon mirror 15 is not provided with the dust cover 20, and the emission area is an optical aperture surface 21.
  • the optical aperture surface 21 may be made of any material that transmits light, and is made of, for example, transparent glass.
  • such a dustproof structure provides a completely hermetic structure, thereby preventing dust from entering from the outside. Therefore, this dustproof structure prevents dust from adhering to the optical members in the optical units 1a and lb. For example, reflection caused by the dust adherence of the polygon mirror 15 and the aperture mirror 16 The deterioration of the S / N ratio can be prevented without deterioration of the rate.
  • a guide groove 22 is formed in the optical unit main body 19 (FIGS. 5 (a) and 6), and a dust cover 20 is inserted into the guide groove 22. (Fig. 5 (b), Fig. 6).
  • the tip 20a of the dustproof cover 20 is provided with a hooking structure, and the dustproof cover 2 for the guide groove 22 is provided.
  • the process of attaching and detaching 0 is easy. No screws are required, and excellent maintenance such as optical axis adjustment is achieved.
  • the dustproof cover 20 and the optical unit main body 19 are guided by the positioning mechanism (the guide groove 22), and the dustproof cover 20 and the optical unit The main body 19 is fitted to the connector c to prevent dust from entering from outside.
  • this dustproof structure is completely built into the optical units 1a and 1b, and the dustproof structure does not increase the size of the optical units 1a and 1b.
  • the laser light emitted from the light emitting element 11 is converted into a collimation lens.
  • the light is collimated at 1 2, passes through the aperture 16 a of the aperture mirror 16, and is rotated by the polygon mirror 15 to form the optical aperture 2
  • the light is angularly scanned in a plane substantially parallel to the display screen 10 through 1 and projected on the retroreflective sheet 7. Then, the reflected light from the retroreflective sheet 7 is reflected by the polygon mirror 15 and the aperture mirror 16, and then condensed by the condenser lens 17, and is reflected by the slit plate 14. The light passes through the slit 14 a and enters the light receiving element 13. However, when the pointer S is present in the scanning light path, the reflected light is not incident on the light receiving element 13 because the projected light is blocked.
  • Each optical unit 1a, 1b includes a light emitting element driving circuit 2a, 2b for driving each light emitting element 11, and a light receiving signal detecting circuit 3 for converting the amount of light received by each light receiving element 13 into an electric signal. a, 3b, and a scan synchronization control circuit 4 for controlling the operation of each polygon mirror 15 to synchronize the start of optical scanning in each of the optical units la, lb. Also, reference symbols
  • Reference numeral 5 denotes an MPU that calculates the position and size of the pointer S and controls the operation of the entire device.
  • Reference numeral 6 denotes a table that displays the calculation results and the like of the MPU 5. Display device.
  • the MPU 5 sends a drive control signal to the light-emitting element drive circuits 2a and 2b, and the light-emitting element drive circuits 2a and 2b are driven according to the drive control signals, so that the light-emitting operation of each light-emitting element 11 is performed. Controlled.
  • the light receiving signal detection circuits 3 a and 3 b send the light receiving signals from the respective light receiving elements 13 to the MPU 5.
  • the MPU 5 calculates the position and size of the pointer S based on the light receiving signal from each light receiving element 13 and displays the calculation result on the display device 6.
  • the display device 6 can also serve as the display screen 10.
  • the light projected from the optical unit 1b is applied to the light receiving element 13 as shown in FIG. From the incident position, scanning is performed in the counterclockwise direction on FIG. 1, and the position (P s) where the light is reflected at the leading end of the retroreflective sheet 7 is a substantial scanning start position. Then, the light is reflected by the reflexive reflection sheet 7 up to the position (P 1) reaching one end of the pointer S, but is reflected up to the position (P 2) reaching the other end of the pointer S. The light is blocked by S and is reflected by the retroreflective sheet 7 until reaching the subsequent scanning end position (P e).
  • FIG. 7 is a schematic diagram showing a relationship between scanning light and an incident angle.
  • the optical aperture surface 21 is provided so that the direction of the scanning light at which the reflected light is minimized coincides or substantially coincides with the normal direction. Therefore, when the reflected light is minimized, the transmittance of the optical aperture surface 21 is maximized, and a decrease in the S / N ratio can be prevented.
  • FIG. 8 is a graph showing a relationship between an incident angle and a transmittance in a visible light cut filter. From FIG. 8, it can be seen that the transmittance becomes maximum near the incident angle of 0 degree. Therefore, when the reflected light is incident on the optical aperture surface 21 formed of the visible light cut filter at an incident angle of approximately 0 degree, the transmittance becomes maximum, and the position where the reflected light becomes minimum in this direction ( When the angle of incidence on the retroreflective sheet 7 is maximized), the S / N ratio is improved. In this case, the normal direction of the optical aperture surface 21 is set to a scanning angle of 60 degrees.
  • a transmittance higher than a predetermined value can be obtained in the range of an incident angle of ⁇ 45 degrees, so that the normal direction of the optical aperture surface 21 is set to 45 degrees or approximately 45 degrees.
  • a transmittance higher than a predetermined value within the entire scanning range (scan angle 0 to 90 degrees).
  • the normal direction of the optical aperture surface 21 is the direction of the optical axis of the scanning light from the polygon mirror 15.
  • a part of the scanning light from the polygon mirror 15 is specularly reflected on the optical aperture surface 21 and returns to the polygon mirror 15 with this setting.
  • Noise may occur.
  • the influence of the specular reflection component on the optical aperture surface 21 is eliminated.
  • the specular light from the optical aperture surface 21 is not received by the light receiving element 13 so that the normal line of the optical aperture surface 21 falls upward or downward with respect to the optical axis of the scanning light.
  • the optical aperture surface is such that the normal direction (dashed line B) of the optical aperture surface 21 is inclined upward by an angle ⁇ / 2 from the optical axis (solid line A) of the scanning light. 2 1 is set.
  • the specular reflection light of the scanning light from the polygon mirror 15 on the optical aperture surface 21 is directed away from the incident optical axis (solid line ⁇ ) by an angle ⁇ upward (solid line). Proceed to C), and the light is not received by the light receiving element 13 via the polygon mirror 15. Note that this angle ⁇ / 2 is called the opening plane inclination angle. Next, the setting of the opening plane inclination angle will be considered. In order to prevent specularly reflected light from the optical aperture surface 21 from being incident on the light receiving element 13, as shown in FIG.
  • the distance from the aperture mirror 16 to the light receiving lens 17 is D
  • the aperture Assuming that the distance from the polygon mirror 16 to the polygon mirror 15 is dL, the distance from the polygon mirror 15 to the optical aperture surface 21 is d L, and the radius of the light receiving lens 17 is B, Condition (1) should be satisfied.
  • the inclination angle of the opening face so as to satisfy the condition (1), it is possible to eliminate the above-described influence of the regular reflection.
  • ⁇ / 2 is close to 0, the transmittance is hardly attenuated in the optical aperture surface 21 with such a degree of inclination, and the transmittance is not a problem.
  • the dustproof cover 20 is made up of a resin-made visible light power filter having a characteristic of selectively transmitting light in a wavelength range of 700 nm or more. In such a case, in addition to the dust-proof function, a function of blocking disturbance light from fluorescent lamps, incandescent lamps, and the like can be performed.
  • An antireflection film is provided on the optical aperture surface 21. In this case, reflection at the optical aperture surface 21 is suppressed, and the influence of regular reflection can be eliminated.
  • Fig. 12 is a sectional view of the optical unit ia, lb.
  • the portion covering the polygon mirror 15 is a curved surface, and the shape of the curved surface is Is concentric with the circumcircle of the polygon mirror 15 (indicated by the dashed line in Fig. 12). Therefore, the airflow generated by the rotation of the polygon mirror 15 can be made smooth. As a result, the generation of airflow noise can be reduced, which is a measure against noise.
  • the diffused light from the aperture mirror i6 is reflected on the inner surface of the dust cover 20 to become noise light, and the noise light reaches the polygon mirror 15 to perform accurate detection processing. May not be. Therefore, use the following configuration to eliminate the influence of noise light.
  • FIG. 13 is a configuration diagram of an example of an optical unit in which such noise light countermeasures are taken.
  • a non-reflective sheet 23 is provided on the inner surface of the dust cover 20 so as to extend parallel to the optical path from the aperture mirror 16 to the polygon mirror 15. Therefore, the diffused light from the aperture mirror 16 serving as noise light is absorbed or scattered by the non-reflection sheet 23 and does not reach the polygon mirror 15. As a result, detection accuracy can be improved.
  • FIG. 14 is a configuration diagram of another example of an optical unit having such noise light countermeasures.
  • the dust cover 20 protrudes to the vicinity of the circumscribed circle of the polygon mirror 15, and the surface (the surface on the aperture mirror 16 side) and the rear surface (the surface of the polygon mirror 15) of the protrusion 2 Ob
  • a non-reflective sheet 23 is provided on the side surface). Therefore, the diffused light from the aperture mirror 16 serving as noise light is absorbed or scattered by the non-reflective sheet 23 on the surface side, and does not reach the polygon mirror 15. Also, even if there is noise light that reaches the polygon mirror 15 through the non-reflective sheet 23, the reflected light is absorbed or scattered by the non-reflective sheet 23 on the back side. As a result, the light does not reach the light receiving element 13. As a result, the detection accuracy can be improved.
  • FIG. 15 is a schematic diagram showing an embodiment of an optical scanning type touch panel.
  • the configuration is other than the optical units 1a and 1b, the retroreflective sheet 7, and the display screen 10 The members are not shown. Also, the case where a finger is used as the pointer S is shown.
  • the MPU 5 rotates each of the polygon mirrors 15 in the optical units 1a and 1b so that the laser light from each light emitting element 11 is rotated. Is scanned angularly. As a result, the reflected light from the retroreflective sheet 7 enters each light receiving element 13. In this way, the amount of light received by each light receiving element 13 is obtained as a light receiving signal output from the light receiving signal detection circuits 3a and 3b.
  • ⁇ 00 and ⁇ 00 indicate the angle from the scanning reference line to each light-receiving element
  • ⁇ 0 and ⁇ 0 indicate the angles from the scanning reference line to the end of the retroreflective sheet 7.
  • ⁇ 1 and 1 are the angles from the scanning reference line to the reference line end of the indicator S
  • 0 2 and 0 2 are the angles from the scanning reference line to the reference line and the opposite end of the indicator S, respectively. Is shown.
  • the indicator S in this example, The process of obtaining the coordinates of the center position (pointed position) of the finger will be described.
  • the position of the optical unit 1a is set to the origin 0, the right side and the upper side of the display screen 10 are set to the X axis and the Y axis, and the length of the reference line (optical unit 1 Let L be the distance between a and 1b). Further, the position of the optical unit 1b is assumed to be B.
  • the center point P (PX, Py) indicated by the pointer S on the display screen 10 is the point when the force is located at an angle of 6 » ⁇ from the optical unit la, lb to the X axis.
  • the values of the X coordinate P x and the Y coordinate P y of P can be obtained from the following equations (2) and (3), respectively, based on the principle of triangulation.
  • the average value of the angle is obtained, and the average value of the angle is substituted into the conversion formulas (2) and (3) of the triangulation to obtain the coordinates of the center point Pc, which is the designated position.
  • the orthogonal coordinates of the four points P1 to P4 are obtained from the scanning angle according to the conversion formulas (2) and (3) for triangulation, and the average of the coordinate values of the four points is calculated. Then, it is possible to obtain the coordinates of the center point Pc. It is also possible to determine the coordinates of the center point Pc, which is the designated position, in consideration of the parallax and the visibility of the designated position.
  • FIG. 18 is a timing chart showing the relationship between the received light signal from the received light signal detection circuit 3a and the scanning angle ⁇ and the scanning time T of the polygon mirror 15 in the optical unit 1a. . If the scanning angular velocity of the polygon mirror 15 is constant and the scanning angular velocity is ⁇ , the scanning angle ⁇ and the scanning time ⁇ have a proportional relationship as shown in the following equation (6). .
  • FIG. 19 is a schematic diagram showing the principle of measuring the diameter of the cross section of the pointer S.
  • D 1 and D 2 are the diameters of the cross section of the pointer S viewed from the optical units 1 a and 1 b, respectively.
  • the distance ⁇ P c (rl) from the position 0 (0, 0), B (L, 0) of the optical unit la, lb to the center point P c (P cx, P cy) of the pointer S , BP c (r 2) are obtained as in the following equations (9) and (10).
  • the dust proof structure is provided in the optical unit, external dust does not enter the optical unit and adhere to the internal optical members. Deterioration of the characteristics of the optical member can be prevented, and the position of the indicator can be accurately detected.
  • the reflected light from the retroreflector that minimizes the amount of light is made to enter the optical aperture almost perpendicularly, the reflected light that minimizes the amount of light can be efficiently received and the detection accuracy can be improved. Can be improved.
  • the scanning light emitted from the optical unit is specularly reflected by the optical aperture and enters the optical unit. This can be prevented, and the detection accuracy can be improved.
  • the inclination angle of the normal to the optical aperture surface with respect to the optical axis of the scanning light is set to be larger than half the viewing angle of the light receiving unit. Does not affect viewing angle restriction.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

Deux unités optiques renfermant, chacune, un système optique comprenant un élément émetteur de lumière, un élément récepteur de lumière et un miroir polygonal, sont installées à l'extérieur des coins respectifs de l'un des petits cotés d'un écran de visualisation. Chaque unité optique envoie un faisceau lumineux à balayage angulaire et une partie de la lumière du faisceau de balayage réfléchie par une feuille rétroréfléchissante est reçue. On détermine l'emplacement où le faisceau lumineux est bloqué par un pointeur d'après la puissance de la lumière réfléchie correspondant à l'angle de balayage. Chaque unité optique possède une structure à l'épreuve de la poussière destinée à empêcher toute pénétration de poussière dans le dispositif.
PCT/JP1999/006528 1999-03-25 1999-11-22 Ecran tactile pour lecture optique WO2000058820A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8262999A JP4004177B2 (ja) 1999-03-25 1999-03-25 光走査型タッチパネル
JP11/82629 1999-03-25

Publications (1)

Publication Number Publication Date
WO2000058820A1 true WO2000058820A1 (fr) 2000-10-05

Family

ID=13779752

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/006528 WO2000058820A1 (fr) 1999-03-25 1999-11-22 Ecran tactile pour lecture optique

Country Status (2)

Country Link
JP (1) JP4004177B2 (fr)
WO (1) WO2000058820A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102262485A (zh) * 2010-05-26 2011-11-30 北京汇冠新技术股份有限公司 触摸定位方法和装置、触摸屏、触摸系统和显示器
US20160239151A1 (en) * 2015-02-16 2016-08-18 Boe Technology Group Co., Ltd. Touch Panel and Display Device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001282445A (ja) * 2000-03-31 2001-10-12 Ricoh Co Ltd 座標入力／検出装置および情報表示入力装置
KR100951679B1 (ko) * 2009-05-29 2010-04-07 주식회사 아하정보통신 터치스크린 장치
WO2017013957A1 (fr) * 2015-07-17 2017-01-26 富士電機株式会社 Panneau tactile optique, structure anti-reflet pour surface intérieure de couvercle, et machine de vente
JP2023040701A (ja) * 2021-09-10 2023-03-23 株式会社デンソー 光検出装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62142287A (ja) * 1985-12-17 1987-06-25 Fuji Xerox Co Ltd 反射型光センサ
JPS6418823A (en) * 1987-05-11 1989-01-23 Dale Electronics Contact panel apparatus and use thereof
JPH01152529A (ja) * 1987-12-10 1989-06-15 Yokogawa Electric Corp 光学式タッチスクリーンの防塵装置
JPH01206205A (ja) * 1988-02-12 1989-08-18 Keyence Corp スペックルパターン干渉計
EP0600576A1 (fr) * 1992-10-07 1994-06-08 MICROFIELD GRAPHICS, Inc. Système d'acquisition de données graphiques, sensible au champ électromagnétique, basé sur un code
JPH0980342A (ja) * 1995-07-10 1997-03-28 Ricoh Co Ltd 光走査装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62142287A (ja) * 1985-12-17 1987-06-25 Fuji Xerox Co Ltd 反射型光センサ
JPS6418823A (en) * 1987-05-11 1989-01-23 Dale Electronics Contact panel apparatus and use thereof
JPH01152529A (ja) * 1987-12-10 1989-06-15 Yokogawa Electric Corp 光学式タッチスクリーンの防塵装置
JPH01206205A (ja) * 1988-02-12 1989-08-18 Keyence Corp スペックルパターン干渉計
EP0600576A1 (fr) * 1992-10-07 1994-06-08 MICROFIELD GRAPHICS, Inc. Système d'acquisition de données graphiques, sensible au champ électromagnétique, basé sur un code
JPH0980342A (ja) * 1995-07-10 1997-03-28 Ricoh Co Ltd 光走査装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102262485A (zh) * 2010-05-26 2011-11-30 北京汇冠新技术股份有限公司 触摸定位方法和装置、触摸屏、触摸系统和显示器
WO2011147302A1 (fr) * 2010-05-26 2011-12-01 北京汇冠新技术股份有限公司 Procédé et dispositif de localisation tactile, écran tactile, système tactile et affichage
CN102262485B (zh) * 2010-05-26 2014-04-02 北京汇冠新技术股份有限公司 触摸定位方法和装置、触摸屏、触摸系统和显示器
US20160239151A1 (en) * 2015-02-16 2016-08-18 Boe Technology Group Co., Ltd. Touch Panel and Display Device
US9880669B2 (en) * 2015-02-16 2018-01-30 Boe Technology Group Co., Ltd. Touch panel with infrared light receiving elements, and display device

Also Published As

Publication number Publication date
JP4004177B2 (ja) 2007-11-07
JP2000276300A (ja) 2000-10-06

Similar Documents

Publication Publication Date Title
JP4043128B2 (ja) 光走査型タッチパネル
JP4097353B2 (ja) 光走査型タッチパネル
JP4007705B2 (ja) 光走査型タッチパネル
US6352351B1 (en) Method and apparatus for inputting coordinates
US6654007B2 (en) Coordinate input and detection device and information display and input apparatus
JP3827450B2 (ja) 光走査型タッチパネル
JP3830121B2 (ja) 物体検出用光学ユニット及びそれを用いた位置座標入力装置
WO2000058820A1 (fr) Ecran tactile pour lecture optique
WO2001057635A1 (fr) Detecteur de position optique
JP4454667B2 (ja) 光走査型タッチパネル
JP5251641B2 (ja) 光電センサ
JP4531081B2 (ja) 光走査型タッチパネル
JP3805316B2 (ja) 光走査型タッチパネル
JP3797803B2 (ja) 光走査型タッチパネル
JP4073069B2 (ja) 光走査型タッチパネル
JP4393531B2 (ja) 光走査型タッチパネル
US20060197747A1 (en) Photosensing device
JP2007280433A (ja) 光走査型タッチパネル
WO2000014623A1 (fr) Ecran tactile de lecture optique
JP4175715B2 (ja) 光走査型タッチパネル
JP4183327B2 (ja) 光走査型タッチパネル
JP3690163B2 (ja) 光学式センサ及び基板検出装置
JP2001014105A (ja) タッチパネルの座標検出装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): DE FR GB IT

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase