WO2009136522A1 - Dispositif d'entrée de position, procédé d'entrée de position, et programme d'entrée de position - Google Patents

Dispositif d'entrée de position, procédé d'entrée de position, et programme d'entrée de position Download PDF

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Publication number
WO2009136522A1
WO2009136522A1 PCT/JP2009/055995 JP2009055995W WO2009136522A1 WO 2009136522 A1 WO2009136522 A1 WO 2009136522A1 JP 2009055995 W JP2009055995 W JP 2009055995W WO 2009136522 A1 WO2009136522 A1 WO 2009136522A1
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WO
WIPO (PCT)
Prior art keywords
light
contact
light receiving
coordinate
light emitting
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PCT/JP2009/055995
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English (en)
Japanese (ja)
Inventor
一欽 葛西
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株式会社セガ
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Publication of WO2009136522A1 publication Critical patent/WO2009136522A1/fr

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    • 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

Definitions

  • the present invention relates to a position input device, a position input method, and a position input program for inputting position data indicating a coordinate position.
  • a touch panel that can operate a personal computer (ATM), personal digital assistant (ATM), PDA (Personal Digital Assistant), game machine, etc. by touching the screen with a finger or a dedicated pen What is called is known.
  • This touch panel detects the position touched by a finger or a dedicated pen, identifies the position on the panel surface (vertical coordinate position and horizontal coordinate position), and uses the identified position as an input signal (position data) This is given to the various devices described above.
  • the detection of contact with the panel surface includes a pressure-sensitive type that detects a change in pressure, an electrostatic type that detects an electric signal due to static electricity, and an optical type that combines a light-emitting element and a light-receiving element.
  • Patent Document 1 As an optical method, in Patent Document 1, for example, as shown in FIG. 10, a plurality of light emitting elements 31 and 32 and a plurality of light receiving elements 33 and 34 are opposed to each side of the display surface 30.
  • the input position to the display surface 30 is recognized by detecting the blocking state of the light emitted from the light emitting elements 31 and 32 that sequentially emit light and incident on the light receiving elements 33 and 34 facing each other, they are adjacent to each other.
  • the light-emitting elements 31 and 32 have proposed a touch panel that does not continuously emit light.
  • points A and D, points B and C, etc. contact points such as fingers or the like in two places at places that are not on the same line connecting the light emitting elements 31 and 32 and the light receiving elements 33 and 34, respectively. If there is, the light from the light emitting elements 31 and 32 reaches the two contact objects, respectively, so that the input position of each contact object can be specified.
  • the coordinates determined by blocking the light to the light receiving elements 33 and 34 are each one coordinate (for example, X coordinate) and other coordinates (for example, Y coordinate), and each input position is specified. Will not be able to.
  • a plurality of light emitting elements 41 are arranged in parallel in the X-coordinate direction of the light guide plate 40, and these light emitting elements 41 are, for example, turned on (partially scanned).
  • Light is incident on the light guide plate 40, and the scattered light generated under the contact position of the fingertip 50 or the like to the touch area 40a is received by a plurality of light receptions provided along the Y coordinate direction of the light guide plate 40, for example. It can be considered that light is received by the element 42.
  • the light receiving element 42 According to the sequential lighting (lighting scanning) of the light emitting elements 41. It is considered that the input positions (points A and C, or points B and D), which are the respective contact points, are specified by sequentially receiving the light.
  • the light receiving elements 42 sequentially receive light according to the sequential lighting (lighting scanning) of the light emitting elements 41, so that the respective contact points. It is considered that a certain input position (point A to point D) is specified.
  • the light emitting element 41a is turned on when the fingertip 50 or the like is simultaneously in contact with the point A and the point B or the point C and the point D. If so, the scattered light under the contact position of point A or point C is received by the light receiving element 42a or 42b.
  • the amount of scattered light received by the light receiving element 42 may similarly decrease, leading to a decrease in position detection accuracy. That is, at the same X coordinate position, for example, if the light emitting element 41a is turned on when the fingertip 50 or the like is simultaneously in contact with the point A and the point C, first, under the contact position of the point C close to the light emitting element 41a. Scattered light is received by the light receiving element 42b.
  • the light from the light emitting element 41a diffuses under the contact position of the point C, the amount of scattered light under the contact position of the point A far from the light emitting element 41a is reduced, and the light receiving element 42a This reduces the amount of scattered light received.
  • the present invention has been made in view of such a situation, and is a case where a light guide plate capable of simultaneous multipoint input is used, and even if there are a plurality of contact points at the same coordinate position,
  • An object of the present invention is to provide a position input device, a position input method, and a position input program that can accurately detect the input position of a contact point.
  • the position input device of the present invention is a position input device that inputs position data indicating an input position by a contact object, has a touch area on one side, and generates scattered light in response to the touch to the touch area.
  • Light emitting means for entering the light and scattered light under the contact position of the contact point provided along one side of the light guide plate and contacting the touch area by the contact object to discriminate other coordinates
  • Light receiving means for receiving light and control means for performing lighting scanning for partially lighting the light emitting means or non-lighting scanning for partially turning off the light emitting means, wherein the control means receives the scattered light by the light receiving means.
  • the input position to the touch area by the contact object is specified from the coordinates when the light receiving means is received and the coordinates of the light emitting means when the lighting scanning or non-lighting scanning is performed at the time of light reception by the light receiving means, and the one coordinate And / or there are a plurality of the contact points by the contact object on the same coordinate of the other coordinates, and the other contact point between any one of the contact points and the light emitting means or the light receiving means.
  • control is performed so as to change a threshold value when the scattered light of the light receiving means corresponding to any contact point is received according to the direction of the lighting scanning or the non-lighting scanning.
  • control means gradually sets a threshold value in the light receiving means corresponding to any one of the contact points in order from the light receiving means corresponding to the contact point located near the light emitting means or the light receiving means. It may be controlled so as to be lower or higher.
  • the position input method of the present invention is a position input method for inputting position data indicating an input position by a contact object, and generates scattered light in response to contact with a contact area on a touch area on one side of a light guide plate.
  • the light guide plate is formed by light emitting means provided in the entire region corresponding to the touch area on one surface of the light guide plate opposite to the touch area in one coordinate direction of the light guide plate.
  • the light receiving means provided along one side of the light guide plate, under the contact position of the contact point by the contact with the touch area by the contact object A step of receiving the scattered light, and a step of causing the light-emitting means to perform a lighting scan or a non-lighting scan by the control means, and when the scattered light is received by the light-receiving means by the control means.
  • An input position to the touch area by the contact object is specified from the coordinates and the coordinates of the light emitting means when the lighting scanning or non-lighting scanning is performed at the time of light reception by the light receiving means, and further, the one coordinate and / or When there are a plurality of the contact points by the contact object on the same coordinate of the other coordinates, and there is another contact point between any one of the contact points and the light emitting means or the light receiving means.
  • the threshold value for receiving the scattered light of the light receiving means corresponding to any contact point is controlled in accordance with the direction of the lighting scanning or the non-lighting scanning.
  • a position input program is a position input program for causing a computer to execute a position input method for inputting position data indicating an input position, and for contacting a contact area to a touch area on one side of a light guide plate.
  • Light emission provided in the whole area corresponding to the touch area on one surface of the light guide plate opposite to the touch area in order to determine one coordinate to generate scattered light in response.
  • the touch area on the surface side opposite to the one coordinate direction of the light guide plate or the touch area on the one surface side of the light guide plate is controlled by the control means, for example, lighting scanning.
  • the light from the light emitting means provided in the entire area corresponding to the light enters the light guide plate, and the light receiving means provided along one side of the light guide plate causes the contact point to contact the touch area by the contact object.
  • the control means determines from the coordinates when the scattered light is received by the light receiving means and the coordinates of the light emitting means that are lit and scanned when the light receiving means receives the light.
  • the threshold value for receiving the scattered light of the light receiving means corresponding to any of the contact points according to the direction of lighting scanning or non-lighting scanning of the light emitting means is Be changed.
  • the threshold when receiving the scattered light of the light receiving means corresponding to any one of the contact points is, for example, If it is controlled to be low, there is another contact point between any one of the contact points and the light emitting means or the light receiving means, and the light from the light emitting means is diffused by the other contact points. Even if the scattered light generated under the contact position of one of the contact points is diffused by other contact points and the amount of scattered light received by the light receiving means is reduced, the light receiving sensitivity of the light receiving means is the threshold value. Therefore, the scattered light generated under the contact position of one of the contact points is reliably received.
  • the input position to the touch area by the contact object is specified from the coordinates, and there are a plurality of contact points by the contact object on the same coordinate of one coordinate and / or other coordinates, any one of the contact points and the light emitting means or
  • the threshold value when receiving the scattered light of the light receiving means corresponding to any of the contact points is changed so as to be low, for example.
  • FIG. 1 It is a figure which shows one Example of the position input device of this invention. It is a figure for demonstrating specification of the input position in case the some contact point exists in the same Y coordinate position of the touch area of the light-guide plate of FIG. 1, for example. It is a figure for demonstrating specification of the input position in case the some contact point exists in the same X coordinate position of the touch area of the light guide plate of FIG. 1, for example. It is a figure for demonstrating the basic principle of the light-guide plate of the position input device of FIG. It is a flowchart for demonstrating specification of the input position in case the some contact point exists in the same Y coordinate position of the touch area of the light-guide plate of FIG. 1, for example.
  • the input position to the touch area by the contact object from the coordinates when the scattered light is received by the light receiving means by the control means and the coordinates of the light emitting means that are lighted and scanned when the light receiving means is received for example. Is specified, and there are multiple contact points due to the contact object on the same coordinate of one coordinate and / or other coordinates, and there is another contact point between any one of the contact points and the light emitting means or the light receiving means Is controlled such that the threshold value when receiving the scattered light of the light receiving means corresponding to any one of the contact points is lowered, for example.
  • the threshold when receiving the scattered light of the light receiving means corresponding to any one of the contact points is, for example, If it is controlled to be low, there is another contact point between any one of the contact points and the light emitting means or the light receiving means, and the light from the light emitting means is diffused by the other contact points. Even if the scattered light generated under the contact position of one of the contact points is diffused by other contact points and the amount of scattered light received by the light receiving means is reduced, the light receiving sensitivity of the light receiving means is the threshold value. For example, when the light guide plate that allows multi-point simultaneous input is used, the scattered light generated under the contact position of any contact point is reliably received. The same coordinate position. Even if the contact points, the input position of the respective contact point is to be accurately detected.
  • control means controls the threshold value in the light receiving means corresponding to any contact point to be lowered stepwise, for example, in order from the light emitting means or the light receiving means corresponding to the contact point close to the light receiving means.
  • the control means controls the threshold value in the light receiving means corresponding to any contact point to be lowered stepwise, for example, in order from the light emitting means or the light receiving means corresponding to the contact point close to the light receiving means.
  • FIG. 1 is a diagram showing an embodiment of the position input device of the present invention
  • FIG. 2 is for specifying an input position when there are a plurality of contact points, for example, at the same Y coordinate position in the touch area of the light guide plate of FIG.
  • FIG. 3 is a diagram for explaining the specification of the input position when there are a plurality of contact points at, for example, the same X coordinate position of the touch area of the light guide plate of FIG.
  • the position input device 1 includes a light guide plate 2, a plurality of light emitting elements 3, a plurality of light receiving elements 4, and an input position detection unit 5.
  • the light guide plate 2 guides light from the plurality of light emitting elements 3, and the surface thereof is a touch area 2a.
  • the light guide plate 2 scatters light traveling under the contact position.
  • the scattering that occurs when the fingertip 10 or the like comes into contact with the touch area 2a is caused by a change in the refractive index at the boundary surface at the contact point of the fingertip 10 or the like in the touch area 2a.
  • the scattered light due to the scattering is received by any one of the plurality of light receiving elements 4, and details thereof will be described later.
  • the plurality of light emitting elements 3 are provided to determine, for example, the X coordinate position, which is a coordinate position in one coordinate direction.
  • the plurality of light emitting elements 3 are arranged side by side on the side end surface on one side of the light guide plate 2 (the side end surface on the lower side in FIG. 1) so that light can enter the light guide plate 2. And when the light from each light emitting element 3 enters into the light guide plate 2 from the side end face on one side, the light passes through the light guide plate 2 along the incident direction and the opposite side of the touch area 2a. When the fingertip 10 or the like comes into contact with the touch area 2a, the light is scattered under the contact position.
  • the plurality of light receiving elements 4 are provided to determine, for example, the Y coordinate position, which is a coordinate position in another coordinate direction.
  • the plurality of light receiving elements 4 are arranged side by side on the side end surface on the other side of the light guide plate 2 (the side end surface on the right side in FIG. 1) so as to receive light (scattered light) from within the light guide plate 2. ing.
  • each light receiving element 4 is scattered light that travels in a direction substantially orthogonal to the traveling direction of the light from the light emitting element 3 among the scattered light generated under the contact position of the fingertip 10 or the like in the touch area 2a. Will be received.
  • an infrared LED having an infrared wavelength (peak emission wavelength) of 870 nm and a half-value angle of ⁇ 5 ° can be used as the light-emitting element 3 described above.
  • a phototransistor having an infrared peak sensitivity wavelength of 870 nm and a half-value angle of ⁇ 15 ° can be used.
  • the light guide plate 2 for example, an acrylic plate (refractive index: about 1.49; total reflection angle (critical angle): 42.2 °) can be used.
  • an incident angle ⁇ described later of the light emitting element 3 can be set to a value close to a critical angle of 42.2 °.
  • the thickness of an acrylic board can be set to 2 mm as an example from which a favorable input position sensitivity is obtained.
  • the light emitting element driving unit 5a sequentially turns on (lights and scans) the light emitting elements 3 under the control of the control unit 5e.
  • the light emitting elements 3 can be sequentially turned on from the rightmost light emitting element 3 in the drawing or sequentially from the leftmost light emitting element 3 in the drawing.
  • a plurality of light emitting elements 3 may be turned on at random.
  • the timing of sequentially lighting (lighting scanning) the light emitting elements 3 can be, for example, when all the light emitting elements 3 are turned on and light is received by any one of the light receiving elements 4.
  • any light receiving element 4 receives light when any one of the light emitting elements 3 is turned on, the X coordinate position by the light emitting element 3 and the Y coordinate position by the light receiving element 4 are discriminated, and these coordinates are determined.
  • a plurality of light receiving elements 4 by sequentially lighting (lighting scanning) the light emitting elements 3, a plurality of X coordinate positions by each light emitting element 3 and a plurality of Y coordinate positions by each light receiving element 4 are discriminated.
  • a plurality of input positions points A and B
  • the light receiving elements 4 sequentially receive light according to the sequential lighting (lighting scanning) of the light emitting elements 3 to specify the input positions of the respective contact points.
  • the light receiving element 4 sequentially receives light according to the sequential lighting (lighting scanning) of the light emitting element 3.
  • the respective input positions point B and point C are specified.
  • the scanning of the light emitting elements 3 is not limited to sequential lighting (lighting scanning), and the light emitting elements 3 may be turned off (sequential scanning) sequentially from the rightmost light emitting element 3 in the figure or sequentially from the leftmost light emitting element 3 in the figure.
  • a single input position A point, B point or C point
  • a plurality of inputs in the touch area 2a by discriminating a single or a plurality of X coordinate positions and a single or a plurality of Y coordinate positions.
  • the position (point A, point B and point C) can be specified.
  • the light receiving element driving unit 5b causes the light receiving elements 4 to perform light receiving operations under the control of the control unit 5e.
  • the light receiving element driving unit 5b is controlled by the control unit 5e, when the multipoint simultaneous input by a plurality of contact points such as the fingertip 10 is on the same coordinate of the X coordinate position and / or the Y coordinate position, 3 or the threshold value when the scattered light of the light receiving element 4 corresponding to the contact point far from the light receiving element 4 is received, the light receiving element corresponding to the contact point near the light emitting element 3 or the light receiving element 4 4 is driven to increase the light receiving sensitivity in the light receiving element 4 corresponding to the contact point located far from the light emitting element 3 or the light receiving element 4.
  • the threshold value of the light receiving element 4 corresponding to each contact point can be lowered stepwise from the light receiving element 4 corresponding to the light emitting element 3 or the contact point located near the light receiving element 4.
  • the light emitting element 3 is sequentially turned on (lighting scanning) from the right end, for example, when the fingertip 10 or the like is simultaneously in contact with the points A, B, and C.
  • the light-emitting element 3a is sequentially turned on (lighting scanning)
  • the scattered light under the contact position of the point C is received by the light-receiving element 4a.
  • the scattered light under the contact position of the point C is received by the light receiving element 4a without being diffused at the other contact point.
  • the amount of light received by the light receiving element 4a does not decrease.
  • the light receiving element 4a when scattered light under the contact position of the point B is received by the light receiving element 4a by sequentially lighting (lighting scanning) the light emitting element 3b, the contact point of the point C between the point B and the light receiving element 4a. Therefore, the scattered light under the contact point of point B is diffused at the contact point of point C and received by the light receiving element 4a, so that the amount of light received by the light receiving element 4a is reduced.
  • the light receiving sensitivity of the light receiving element 4 can be increased by lowering the threshold for receiving scattered light from the light receiving element 4a below the threshold for receiving scattered light from the point C.
  • the light receiving element 4a when scattered light under the contact position of the point A is received by the light receiving element 4a by sequentially turning on the light emitting element 3c (lighting scanning), the contact of the point B and the point C between the point A and the light receiving element 4a. Since there is a point, the scattered light under the contact position of point A is diffused at the contact points of point B and point C and received by the light receiving element 4a, and the amount of light received by the light receiving element 4a further decreases. Will end up. In this case, the light receiving sensitivity of the light receiving element 4 is further increased by lowering the threshold for receiving scattered light from the light receiving element 4a to be lower than the threshold for receiving scattered light from the point B. .
  • the light emitting element 3 is sequentially turned on (lighting scanning) from the right end, for example, when the fingertip 10 is simultaneously in contact with the points A, B, and C.
  • the scattered light under the contact positions of the points A, B, and C corresponds to the light receiving elements 4a and 4b corresponding to the contact points. , 4c.
  • the scattered light under the contact position of the point C is received by the light receiving element 4c corresponding to the point C without causing a decrease in the amount of light. Is done.
  • the threshold value for receiving the scattered light at the light receiving element 4b is lowered below the threshold value for receiving the scattered light at the light receiving element 4c corresponding to the point C. Increases light sensitivity.
  • the received light amount measuring unit 5c measures the received light amount in the light receiving element 4 that has received the above scattered light under the control of the control unit 5e.
  • the input position data output unit 5d includes a single or a plurality of X coordinate positions and a single or a plurality of Y coordinate positions that are discriminated by sequentially turning on (lighting scanning) or sequentially turning off (lighting off scanning) under the control of the control unit 5e.
  • the data indicating the input position in the touch area 2a specified based on is output.
  • data indicating the respective input positions is output.
  • the control unit 5e drives the light emitting element driving unit 5a, the light receiving element driving unit 5b, and the received light amount measuring unit 5c described above in order to perform the specific determination of the input position in the touch area 2a.
  • Data indicating one or a plurality of input positions is output from the input position data output unit 5d.
  • control unit 5e receives the scattered light of the light receiving element 4 corresponding to the contact point located far from the light emitting element 3 or the light receiving element 4 with respect to the light receiving element driving unit 5b. Is driven stepwise to increase the light receiving sensitivity of the light receiving element 4.
  • each of the light emitting element 3 and the light receiving element 4 described above has directivity from the necessity of determining the X coordinate position and the Y coordinate position.
  • the number of the light emitting elements 3 and the light receiving elements 4 may be appropriately determined according to the use of the position input device 1, and the input position in the touch area 2a can be determined by increasing the number of each. It is possible to increase the resolution when performing.
  • the plurality of light emitting elements 3 may be configured such that one light source can be scanned by a shutter mechanism or the like. Further, the plurality of light receiving elements 4 may be replaced with one line sensor or an image sensor so that the identification of the Y coordinate position can be determined from the analysis result of the light receiving state.
  • the light guide plate 2 has a sufficiently large thickness compared to the wavelength of incident infrared light, and when the fingertip 10 or the like is not in contact with the touch area 2a as shown in FIG.
  • the incident infrared light travels linearly without being scattered in the width direction.
  • the thickness of the light guide plate 2 it is preferable to reduce the thickness of the light guide plate 2 to some extent (about 2 to 5 mm).
  • the light emitting element 3 in order to make the infrared light from the light emitting element 3 enter the light guide plate 2 from the side end 2b of the light guide plate 2, it is incident according to Snell's law determined by the refractive index of the light guide plate 2 and the surrounding refractive index. Incident of light toward the angle ⁇ is required. Therefore, in order to allow infrared light to enter the light guide plate 2 without loss, as shown in FIG. 4C, the light emitting element 3 is inclined with the light emission direction inclined by an incident angle ⁇ with respect to the end surface of the side end portion 2b. Is preferably arranged.
  • the light emitting elements 3 are sequentially turned on (lighting scanning). At this time, for example, if the lighting (lighting scanning) is sequentially performed from the right end light emitting element 3, the right end light emitting element 3 is turned on (step S1), and the scattered light received by all the light receiving elements 4 is received. The measured light emitting element 3 is turned off (step S3).
  • step S4 the presence / absence of a contact point is determined. If no light is received by all the light receiving elements 4, it is determined that there is no contact point (step S4: NO), and all the light emitting elements 3 are sequentially turned on ( It is determined whether the process of lighting scanning has been performed (step S6).
  • step S6 NO
  • the process returns to step S1, and the next light emitting element 3 is turned on and, as described above, all the light emitting elements 3 are turned on.
  • the scattered light received by the light receiving element 4 is measured, and the turned on light emitting element 3 is turned off (steps S2 and S3).
  • step S4 YES ⁇ for example, it is determined that there is a point C in FIG. 2.
  • the threshold value for receiving the scattered light of the light receiving element 4 is lowered by one step (step S5). Thereby, the light receiving sensitivity of the light receiving element 4 (for example, the light receiving element 4a in FIG. 2) is increased by one step.
  • step S6 it is determined whether or not the sequential lighting (lighting scanning) process has been performed by all the light emitting elements 3 (step S6).
  • step S6 since the sequential lighting (lighting scanning) process by all the light emitting elements 3 is not performed (step S6: NO), the process returns to step S1, and the next light emitting element 3 is turned on and, as described above, all the light emitting elements 3 are turned on.
  • the scattered light received by the light receiving element 4 is measured, and the turned on light emitting element 3 is turned off (steps S2 and S3).
  • step S4 when the process of sequentially lighting (lighting scanning) the light emitting element 3b in FIG. 2 is performed, it is determined that there is a contact point (step S4: YES ⁇ for example, it is determined that there is a point B in FIG. 2). ).
  • the threshold for receiving the scattered light of the light receiving element 4a is lowered by one step, and the light receiving of the light receiving element 4a Since the sensitivity is increased by one step, the scattered light under the contact position of the point B is diffused at the contact point of the point C between the point B and the light receiving element 4a, and the amount of light received by the light receiving element 4a is reduced. Even if it falls, the scattered light under the contact position of point B is reliably received by the light receiving element 4a.
  • step S5 the threshold for receiving the scattered light of the light receiving element 4a where the contact point is located is further lowered by one step (step S5). Thereby, the light receiving sensitivity of the light receiving element 4a is further increased by one step.
  • step S6 it is determined whether or not the sequential lighting (lighting scanning) process by all the light emitting elements 3 has been performed.
  • the sequential lighting (lighting scanning) process by all the light emitting elements 3 is also performed. If not (step S6: NO), the process returns to step S1, the next light emitting element 3 is turned on, and the scattered light received by all the light receiving elements 4 is measured and turned on as described above. 3 is turned off (steps S2 and S3).
  • step S4 YES ⁇ for example, it is determined that there is a point A in FIG. 2.
  • the threshold value for receiving the scattered light of the light receiving element 4a is further lowered by one step, and the light receiving element 4a Since the light receiving sensitivity is further increased by one level, the scattered light under the contact position of the point A is diffused at the contact points of the points B and C between the point A and the light receiving element 4a. Even if the amount of light received by 4a is reduced, the scattered light under the contact position of point A is reliably received by the light receiving element 4a.
  • step S6 when the sequential lighting (lighting scanning) process is performed by all the light emitting elements 3 (step S6: YES), the light reception data for each light emitting element 3 that is sequentially lighted (lighting scanning) is analyzed.
  • the input positions of point A, point B, and point C based on the X coordinate position and the Y coordinate position in the touch area 2a are specified.
  • the light emitting elements 3 are sequentially turned on (lighting scanning). At this time, for example, if lighting (lighting scanning) is sequentially performed from the right end light emitting element 3, the right end light emitting element 3 is turned on (step S1), and the scattered light received by the light receiving element 4 is measured. (Step S2), the presence or absence of a contact point is determined (Step S3).
  • the light receiving element 4 in the order of the light receiving process by the light receiving element 4, assuming that the light receiving element 4 is sequentially performed from the side closer to the light emitting element 3 toward the side farther from the light emitting element 3, in FIG. The presence or absence of light reception is detected.
  • step S3 If there is no light received by the lower light receiving element 4, it is determined that there is no contact point (step S3: NO), and the light receiving process by all the light receiving elements 4 is not completed (step S5: NO). Returning to S2, the scattered light received by the next light receiving element 4 is measured, and the presence or absence of a contact point is determined (step S3).
  • step S5 when the light receiving process by all the light receiving elements 4 is completed (step S5: YES), the light emitting element 3 that is turned on is turned off (step S6).
  • step S7: NO it is determined that there is no contact point by measuring the reception of scattered light by all the light receiving elements 4 (step S7: NO), and the sequential lighting (lighting scanning) by all the light emitting elements 3 has not been completed (step S7).
  • step S9: NO) returning to step S1, the next light emitting element 3 is sequentially turned on (lighting scanning).
  • Step S4 the threshold value for receiving the scattered light of the light receiving element 4 other than the light receiving element 4c where the contact point is located (the remaining light receiving elements 4 subjected to the light receiving process following the light receiving element 4c) is lowered by one step.
  • Step S4 the light receiving sensitivity of the light receiving elements 4 other than the light receiving elements 4c (the remaining light receiving elements 4 subjected to the light receiving process subsequent to the light receiving elements 4c) is increased by one step.
  • step S5 NO
  • the process returns to step S2 and the processes from step S2 are repeated.
  • step S3 YES ⁇ for example, it is determined that there is a point B in FIG. 3).
  • the threshold value for receiving the scattered light of the light receiving element 4b is lowered by one step, and the light receiving element 4b receives the light. Since the sensitivity is increased by one step, the light from the light emitting element 3c is diffused at the contact point of the point C between the point B and the light emitting element 3c, and the scattered light under the contact point of the point B is diffused. Even if the amount decreases and the amount of light received by the light receiving element 4b decreases, the scattered light under the contact position of point B is reliably received by the light receiving element 4b.
  • the scattered light of the light receiving elements 4 other than the light receiving element 4b where the contact point is located (the remaining light receiving elements 4 subjected to the light receiving process subsequent to the light receiving element 4b) is detected.
  • the threshold value for receiving light is further lowered by one step (step S4).
  • the light receiving sensitivity of the light receiving elements 4 other than the light receiving elements 4b (the remaining light receiving elements 4 subjected to the light receiving process subsequent to the light receiving elements 4b) is further increased by one step.
  • step S5 NO
  • the process returns to step S2 and the processes from step S2 are repeated.
  • step S3 YES ⁇ for example, it is determined that there is a point A in FIG. 3).
  • the threshold value for receiving the scattered light of the light receiving element 4a is further lowered by one step, and the light receiving element 4a Since the light receiving sensitivity is further increased by one step, the light from the light emitting element 3c is diffused at the contact point between the point C and the point B between the point A and the light emitting element 3c, so Even if the amount of scattered light at the point is further reduced and the amount of light received by the light receiving element 4a is reduced, the scattered light under the contact position of the point A is reliably received by the light receiving element 4a.
  • step S6 when the light receiving process by all the light receiving elements 4 is completed (step S5: YES), the light emitting element 3 that is turned on is turned off (step S6). Then, when the sequential lighting (lighting scanning) process is performed by all the light emitting elements 3 (step S6: YES), the light reception data for each light emitting element 3 that is sequentially lighted (lighting scanning) is analyzed, and in the touch area 2a. Input positions of points A, B, and C based on the X coordinate position and the Y coordinate position are specified.
  • the coordinates when the scattered light is received by the light receiving element 4 as the light receiving means by the control unit 5e as the control means, and the light emission that is lighted and scanned when the light receiving element 4 receives the light for example.
  • the input position to the touch area 2a by the fingertip 10 or the like which is a contact object is specified, and a plurality of contacts by the fingertip 10 or the like on the same coordinate of one coordinate and / or other coordinates.
  • the threshold value is controlled to be low.
  • the threshold value of the light receiving element 4 corresponding to one of the contact points is lowered stepwise in order from the light receiving element 4 corresponding to the light emitting element 3 or the contact point close to the light receiving element 4.
  • the light from the light emitting element 3 is diffused by the other contact points.
  • scattered light generated under the contact position of any one of the contact points is diffused by the other contact points, so that the amount of the scattered light received by the light receiving element 4 decreases stepwise. Accordingly, the light receiving sensitivity of the light receiving element 4 can be increased stepwise.
  • a plurality of light emitting elements 3 are provided along one coordinate direction of the light guide plate 2, and scattered light from below the contact position due to contact of a contact object such as the fingertip 10 in the touch area 2 a of the light guide plate 2.
  • a plurality of light receiving elements 4 arranged in parallel on the side end face on the other side of the light guide plate 2 (the side end face on the right side in FIG. 1).
  • the light guide plate 2 is superimposed on the display surface 6 that displays the content corresponding to the input position to the touch area 2 a, for example, as shown in FIG. Will no longer affect the video.
  • the light from each light emitting element 3 is infrared light which is non-visible light, visible light from the display surface 6 is not affected.
  • each light emitting element 3 may be a surface light emitting member 3A such as a transparent EL.
  • the present invention is not limited to this, and other light such as ultraviolet light may be used.
  • the light from the light emitting element 3 may be visible light.
  • the light emitting element 3 is moved from the right end, for example.
  • the light receiving elements 4 are sequentially turned on (lighting scanning), and the threshold value of the light receiving element 4 corresponding to each contact point is lowered stepwise from the light receiving element 4 corresponding to the light emitting element 3 or the contact point close to the light receiving element 4.
  • the present invention is not limited to this example, and the threshold value of the light receiving element 4 corresponding to each contact point is set to the light receiving element 3 or the light receiving element corresponding to the contact point far from the light receiving element 4. You may make it high in steps from 4.
  • the light emitting element 3 is sequentially turned on (lit and scanned) from the left end, that is, the side far from the light receiving element 4 to detect the contact point at the farthest position from the light receiving element 4.
  • the threshold value in the light receiving element 4 corresponding to the sequentially detected contact points is increased stepwise.

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  • 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

Lors de l'utilisation d'un guide d'ondes optique permettant une entrée simultanée multipoints, il est possible de détecter de manière précise des positions d'entrée de points de contact respectifs, même lorsqu'une pluralité de points de contact sont présents à la même position de coordonnée. Une unité de commande (5e) en tant que moyen de commande identifie une position d'une entrée sur une zone tactile (2a) par une extrémité de doigt (10) en tant qu'objet de contact conformément à une coordonnée où de la lumière diffusée est reçue par un élément de réception de lumière (4) en tant que moyen de réception de lumière et à une coordonnée d'un élément d'émission de lumière (3) en tant que moyen d'émission de lumière qui a provoqué un balayage lumineux actif lors d'une réception de lumière par l'élément de réception de lumière (4). En outre, lorsqu'une pluralité de points de contact réalisés par une extrémité de doigt (10) sont présents sur une coordonnée et/ou sur la même coordonnée d'une autre coordonnée et si un autre point de contact est présent entre l'un quelconque des points de contact et l'élément d'émission de lumière (3) ou l'élément de réception de lumière (4), le moyen de commande réalise une commande pour abaisser une valeur seuil pour recevoir la lumière diffusée par l'élément de réception de lumière (4) correspondant à l'un quelconque des points de contact.
PCT/JP2009/055995 2008-05-09 2009-03-25 Dispositif d'entrée de position, procédé d'entrée de position, et programme d'entrée de position WO2009136522A1 (fr)

Applications Claiming Priority (2)

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JP2008-123640 2008-05-09
JP2008123640A JP2009271847A (ja) 2008-05-09 2008-05-09 位置入力装置、位置入力方法及び位置入力プログラム

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WO2009136522A1 true WO2009136522A1 (fr) 2009-11-12

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN102207791A (zh) * 2010-03-30 2011-10-05 Smk株式会社 触摸屏的输入位置输出方法
CN104216570A (zh) * 2013-05-29 2014-12-17 北京汇冠新技术股份有限公司 一种提高红外触摸屏触摸精度的方法

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
JP5627116B2 (ja) * 2010-09-21 2014-11-19 日本電信電話株式会社 生体情報検出装置
JP5974745B2 (ja) * 2012-09-10 2016-08-23 コニカミノルタ株式会社 タッチパネル入力装置、タッチ入力方法及びタッチ入力制御プログラム

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JPH10162698A (ja) * 1996-11-27 1998-06-19 Idec Izumi Corp スイッチおよびスイッチ付ディスプレイ
JP2001147776A (ja) * 1999-09-10 2001-05-29 Ricoh Co Ltd 座標入力／検出装置及び情報記憶媒体

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JPH10162698A (ja) * 1996-11-27 1998-06-19 Idec Izumi Corp スイッチおよびスイッチ付ディスプレイ
JP2001147776A (ja) * 1999-09-10 2001-05-29 Ricoh Co Ltd 座標入力／検出装置及び情報記憶媒体

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102207791A (zh) * 2010-03-30 2011-10-05 Smk株式会社 触摸屏的输入位置输出方法
CN104216570A (zh) * 2013-05-29 2014-12-17 北京汇冠新技术股份有限公司 一种提高红外触摸屏触摸精度的方法
CN104216570B (zh) * 2013-05-29 2017-04-26 北京汇冠新技术股份有限公司 一种提高红外触摸屏触摸精度的方法

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