JP2011258037A - Input device, calibration method and calibration program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an input device which is capable of easily performing calibration to precisely correct a rotational displacement or a difference in resolution between a sensor such as a touch panel and a display section such as a LCD, and which is free from influence due to an error in user's operation.SOLUTION: An input device comprises: a first measurement coordinates detection section 405 that detects a first measured coordinate; an operation element control section 404 that displays an operation element at a position corresponding to the detected first measured coordinate on a display section 413, and then continuously displays an operation element at a position corresponding to touch input coordinates detected by contact coordinates obtaining sections 401 and 402 on the display section 413; an overlapped measurement point coordinates detection section 406 that detects, when the operation element displayed on the display section 413 overlaps with a graphic at a predetermined measurement point, the touch input coordinates obtained by the contact coordinates obtaining sections 401 and 402 as overlapped measurement point coordinates; and a correction value calculation section 409 that calculates a correction parameter for correcting the touch input coordinates based on the first measured coordinate and the overlapped measurement point coordinates.

Description

  The present invention relates to an input device, a calibration method, and a calibration program, and in particular, an input device including an input device such as a touch panel and a display device such as an LCD (Liquid Crystal Display), a calibration method thereof, and the like It relates to a calibration program.

  In a touch panel arranged so as to overlap with a display unit such as an LCD, a physical positional deviation Gp and a rotational deviation Ga occur. In addition, since the size of the minimum point that can be displayed on the display unit and the size of the area where the touch panel recognizes the input position as the same coordinate do not necessarily match, the coordinates detected by the touch panel (hereinafter referred to as touch input coordinates) and the display are displayed. A difference Gr occurs in the resolution that is the number of dots per unit length of coordinates handled by the unit (hereinafter referred to as display coordinates). The input device corrects the touch input coordinates based on the positional deviation Gp, the rotational deviation Ga, and the resolution difference Gr in order to recognize where the user's operation has touched on the display unit, and converts the coordinates into display coordinates. There is a need to. The positional deviation Gp, the rotational deviation Ga, and the resolution difference Gr have individual differences, and cannot be completely removed with unique correction parameters. In order to perform the correction including individual differences, a calibration method is known in which a user touches a measurement point displayed on a display unit to measure a difference from a target.

  For example, Patent Document 1 discloses a calibration in which a first measurement reference point displayed on a display unit is input on a touch panel, and a parallel movement amount correction value is obtained from the obtained touch input coordinates and coordinates expected as measurement reference points. And a touch input coordinate correction process using a parallel movement amount correction value are described. In addition, input is performed on the second measurement reference point with the touch panel, and a rotational movement amount correction value centered on the first measurement reference point of the touch input coordinates is obtained from the obtained touch input coordinates and the expected coordinates of the measurement reference points. It describes a calibration method and correction processing of touch input coordinates by adding a rotational movement amount correction value to the parallel movement amount correction value.

  In order to perform calibration with high accuracy, it is necessary for the user to correctly touch the measurement point. If the user operation error is large, the error of the correction value obtained by the calibration is also large, and the correction process cannot be performed correctly. As a countermeasure against the above problem, Patent Document 1 discloses a method of limiting an effective area recognized as contact with a measurement point. As a result, when the user operation error is large, it is determined that the calibration has failed, and the influence of the user operation error can be reduced.

JP 2001-92596 A

  However, in the method described in Patent Document 1, for example, when a correction value is obtained using coordinates measured by contacting several measurement points on the screen with a stylus pen, different user operations are performed for each measurement point in contact. Therefore, if the error between the two measurement points is large in the opposite direction, the rotational deviation Ga and the resolution difference Gr may not be resolved even if correction processing is performed. The problem situation is shown in FIG. The measurement point 101 and its effective range 102, and the measurement point 103 and its effective range 104 are arranged as shown in FIG. 1, the contact point 105 is detected as the contact coordinates to the measurement point 101, and the measurement point 103 When the contact point 106 is detected as the contact coordinates, the straight line connecting the contact point 105 and the contact point 106 is not parallel to the straight line connecting the measurement point 101 and the measurement point 103 on the display unit, and the angle φ Cross at. If the user's operation error is zero, the distance Dt on the display unit from the measurement point 101 to the measurement point 103 and the distance Dm on the display unit from the contact point 105 to the contact point 106 are the same distance, Dm is shorter. The difference in resolution difference resulting from the angle φ and the difference between the distance Dt and the distance Dm remains as an error that cannot be corrected. Since the maximum value of the user operation error measured by reducing the effective range can be reduced, the error of the rotational deviation Ga and the resolution difference Gr can be reduced, but the user needs to touch the measurement point accurately. Because it is, operation becomes difficult. On the other hand, increasing the effective range facilitates the user's operation of touching the measurement point, but the correction cannot be performed correctly when the user's operation error increases. For this reason, it is difficult to achieve both ease of user operation and calibration accuracy.

  The present invention solves such a problem of conventional calibration, and provides an input device, an input device calibration method, and an input device calibration program that do not cause a rotational deviation or resolution difference caused by a user operation. The purpose is to do.

  The input device of the present invention includes a contact coordinate acquisition unit that acquires touch input coordinates that are coordinates corresponding to a touched position, a display unit that is arranged so as to overlap with the contact coordinate acquisition unit, In the case of contact, the first measurement coordinate detection unit that detects the touch input coordinates acquired by the contact coordinate acquisition unit as the first measurement coordinates, and the display unit corresponding to the initial measurement coordinates detected by the first measurement coordinate detection unit An operator control unit for displaying an operator at a position and a position of the display unit corresponding to a touch input coordinate detected by the contact coordinate acquisition unit continuously, and an operator displayed on the display unit are determined in advance. A measurement point overlap coordinate detection unit that detects the touch input coordinates acquired by the contact coordinate acquisition unit as measurement point overlap coordinates when the measurement point graphic overlaps, and the initial measurement position When, having a configuration based on said overlapping measurement point coordinates, and a correction value calculating unit for calculating a correction parameter for correcting the touch input coordinates.

  With this configuration, if the initial measurement can be performed accurately, accurate calibration can be performed from the second point onward even if the user's operation accuracy is low, so that the user can easily perform accurate calibration.

  Further, the input device of the present invention includes the correction value calculation unit that calculates a positional deviation between the contact coordinate acquisition unit and the display unit using the touch input coordinates of the first contact. Have

  With this configuration, the user can easily correct the misalignment.

  In the input device of the present invention, the measurement point overlap coordinate detection unit detects the first measurement coordinate detection unit when the contact coordinate acquisition unit continues to acquire the contact coordinates after the first measurement coordinate detection unit detects the first measurement coordinate. The correction value calculation unit is characterized in that a rotational deviation and a resolution difference between the contact coordinate acquisition unit and the display unit are calculated based on one or more measurement point overlapping coordinates.

  With this configuration, it is possible to obtain a correction parameter in a state in which a user operation error is not included in a difference between two different measurement results used in calculation of a rotational deviation or a resolution difference, and correction can be performed with high accuracy.

  Moreover, the input device of the present invention succeeded in detecting the measurement point overlap coordinates by changing the design of the measurement point at which the measurement was performed when the measurement point overlap coordinate detection unit succeeded in detecting the measurement point overlap coordinates. The measurement point overlap coordinate detection unit is provided to notify that.

  With this configuration, the user can recognize that the measurement point overlap coordinates have been successfully detected by looking at the screen during calibration.

  The input device of the present invention further includes a ringing unit, and when the measurement point overlapping coordinate detection unit succeeds in detecting the measurement point overlapping coordinate, the measurement point overlapping coordinate is successfully detected by ringing the ringing unit. It has the structure provided with the said measurement point overlap coordinate detection part characterized by alerting | reporting.

  With this configuration, the user can recognize that the measurement point overlap coordinates have been successfully detected by hearing.

  The input device of the present invention further includes a light emitting unit, and when the measurement point overlapping coordinate detection unit succeeds in detecting the measurement point overlapping coordinate, the light emitting unit emits light to successfully detect the measurement point overlapping coordinate. It has the structure provided with the said measurement point overlap coordinate detection part characterized by alerting | reporting.

  With this configuration, it is possible to recognize that the user has successfully detected the measurement point overlap coordinates without changing the screen during calibration.

  The input device of the present invention further includes a vibration unit, and when the measurement point overlap coordinate detection unit succeeds in detecting the measurement point overlap coordinate, the measurement point overlap coordinate is successfully detected by vibrating the vibration unit. It has the structure provided with the said measurement point overlap coordinate detection part characterized by alerting | reporting.

  With this configuration, the user can recognize that the measurement point overlap coordinates have been successfully detected by touch.

  Further, the input device of the present invention overlaps when the operator moves to a position where the operator is completely included with respect to a set of measurement points displayed so as to overlap a plurality of measurement points in a state where the centers are shifted. The measurement point overlap coordinate detection unit is characterized in that one measurement point in the measurement point set is a measurement target.

  With this configuration, the user can perform measurement without having to superimpose the operation element on the figure of the measurement point, and the calibration can be easily performed.

  Further, the input device of the present invention is configured such that, from a plurality of measurement points not displayed on the display unit, the distance between the measurement point overlap coordinates detected by the measurement point overlap coordinate detection unit in the past and the operator, the measurement point overlap in the past The measurement point overlap coordinate detection unit is characterized in that the measurement point is dynamically determined based on the elapsed time from the time when the coordinate is detected.

  With this configuration, the touch input coordinates can be automatically measured simply by moving the operation element in the display unit without being conscious of a specific place, so that the user can easily perform calibration.

  Further, the input device of the present invention comprises the measurement point overlapping coordinate detection unit characterized in that the measurement point overlapping coordinate measurement is completed when the operator passes through all the specific areas of the display unit. Have

  With this configuration, it is possible to suppress the measurement point overlap coordinate measurement from being localized, and it is possible to calculate an average correction parameter for the entire sensor.

  Further, the input device of the present invention displays the movement trajectory of the operation element on the display unit, and measures the measurement point overlap coordinates by filling a certain percentage or more of the area of the display unit with the trajectory of the operation element. The measurement point overlap coordinate detection unit is provided to complete the measurement.

  With this configuration, it is possible to suppress the measurement point overlap coordinate measurement from being localized, and it is possible to calculate an average correction parameter for the entire sensor.

  Further, the input device according to the present invention is characterized in that a correction value is calculated by extracting a set of measurement results farthest from the measurement results of the measurement point overlap coordinates measured by the movement of the operation element. It has a configuration including a correction value calculation unit.

  With this configuration, it is possible to suppress the local selection from the measurement results of the measurement point overlap coordinates, and it is possible to calculate an average correction parameter for the entire sensor.

  In addition, the input device of the present invention includes the measurement point overlap coordinate detection unit and the correction value calculation unit, wherein the display unit is divided into a plurality of blocks and calibration is performed for each block. It has a configuration.

  With this configuration, when the physical characteristics of the contact coordinate acquisition unit are not uniform and change depending on the location, errors due to the physical characteristics generated by correcting the entire display screen at once are suppressed and corrected accurately. It can be performed.

  The input device calibration method according to the present invention includes a coordinate acquisition step of acquiring touch input coordinates, which are coordinates corresponding to a touched position, and the coordinate acquisition step in the first contact after the start of calibration. An initial measurement coordinate detecting step for detecting the touch input coordinates as an initial measurement coordinate, an operator display step for displaying an operator at a position corresponding to the initial measurement coordinate detected in the initial measurement coordinate detection step, and the touch input coordinates The touch input coordinates acquired in the coordinate acquisition step are measured when the operation element display update step of moving the display position of the operation element based on the position of the operation element overlaps with the graphic of the predetermined measurement point. A measurement point overlap coordinate detection step for detecting as point overlap coordinates, the initial measurement coordinates, and the measurement point overlap coordinates Based on, and has a configuration in which a correction value calculation step of calculating a correction parameter for correcting the touch input coordinates.

  With this configuration, if the initial measurement can be performed accurately, accurate calibration can be performed from the second point onward even if the user's operation accuracy is low, so that the user can easily perform accurate calibration.

  The calibration program for the input device according to the present invention includes a coordinate acquisition step for acquiring touch input coordinates that are coordinates corresponding to a touched position on the input device, and the coordinates in the first contact after the start of calibration. An initial measurement coordinate detection step for detecting the touch input coordinates acquired in the acquisition step as an initial measurement coordinate; an operator display step for displaying an operator at a position corresponding to the initial measurement coordinates detected in the initial measurement coordinate detection step; When the operator display update step for moving the display position of the operator based on the touch input coordinates and the operator and a graphic of a predetermined measurement point overlap, the touch acquired in the coordinate acquisition step Measurement point overlap coordinate detection step for detecting input coordinates as measurement point overlap coordinates, the initial measurement coordinates, Based on the fixed point overlapping coordinate, a calibration program for executing the correction value calculation step of calculating a correction parameter for correcting the touch input coordinates. .

  With this configuration, if the initial measurement can be performed accurately, accurate calibration can be performed from the second point onward even if the user's operation accuracy is low, so that the user can easily perform accurate calibration.

  According to the input device, the input device calibration method, and the input device calibration program of the present invention, it is possible to calibrate the input device without causing a rotation shift or a resolution difference caused by a user operation. Further, if the first point can be measured accurately, accurate calibration can be performed from the second point onward even if the user's operation accuracy is low, so that the user can easily perform accurate calibration.

The figure which shows the subject of the conventional calibration method The figure which shows an example of the display screen which concerns on Embodiment 1 of this invention The figure which shows an example of the display screen after calibration implementation which concerns on Embodiment 1 of this invention. The block diagram which shows the structure of the input device 400 which concerns on Embodiment 1 of this invention. (A) Measurement point verification unit 407 according to Embodiment 1 of the present invention, measurement point verification unit 1201 according to Embodiment 2, measurement point verification unit 1502 according to Embodiment 3, and measurement according to Embodiment 4 The figure which shows the structure of the measurement point information for the first measurement of the point collation part 1802 (b) The figure which shows the structure of the measurement point information for the measurement point overlap coordinate detection of the measurement point collation part 407 which concerns on Embodiment 1 of this invention. The figure which shows the structure of the coordinate memory | storage part 408 which concerns on Embodiment 1 of this invention. The figure which shows the structure of the correction value memory | storage part 410 which concerns on Embodiment 1 of this invention. Flowchart of correction control section 403 according to Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4 of the present invention Flowchart of initial measurement coordinate detection unit 405 according to Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4 of the present invention Flowchart of measurement point overlap coordinate detection section 406 according to Embodiment 1 of the present invention. (A) The figure which shows an example of the measurement point set which piled up the four measurement points which concern on Embodiment 2 of this invention (b) It measures by the measurement point of the lower right of the measurement point set which concerns on Embodiment 2 of this invention The figure which shows an example at the time of performing (c) The figure which shows an example at the time of measuring at the upper left measurement point of the measurement point set which concerns on Embodiment 2 of this invention The block diagram which shows the structure of the input device 1200 which concerns on Embodiment 2 of this invention. The figure which shows the structure of the measurement point information of the measurement point overlap coordinate of the measurement point collation part 1201 which concerns on Embodiment 2 of this invention. The figure which shows an example of the display screen which concerns on Embodiment 3 of this invention. The block diagram which shows the structure of the input device 1500 which concerns on Embodiment 3 of this invention. Flowchart of measurement point overlap coordinate detection section 1501 according to Embodiment 3 of the present invention. The figure which shows an example of the display screen which concerns on Embodiment 4 of this invention The block diagram which shows the structure of the input device 1800 which concerns on Embodiment 4 of this invention. The figure which shows the structure of the measurement point information of the measurement point overlap coordinate of the measurement point collation part 1802 which concerns on Embodiment 4 of this invention. The figure which shows the structure of the coordinate memory | storage part 1803 which concerns on Embodiment 4 of this invention. The figure which shows the structure of the correction value memory | storage part 1805 which concerns on Embodiment 4 of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 2 is an example of a calibration execution screen in the first embodiment of the present invention. On the display screen 201, measurement points 202 for initial measurement and measurement points 203, 204, 205 for detecting overlapping measurement points are displayed, and the display coordinates of each measurement point are (x0, y0), (x1, y1), (X2, y2), (x3, y3). Further, an operator 206 is displayed that moves in accordance with a user operation and performs measurement when the measurement point overlaps the measurement point. The operator 206 is displayed so as to overlap with the first measurement point 202 when contact with the first measurement point 202 is detected. At this time, the positional deviation Dp is specified by the difference between the touch input coordinates assumed from the display position of the measurement point for initial measurement 202 and the actually detected touch input coordinates. Further, the operator 206 is displayed at the position of the display coordinates obtained by correcting the touch input coordinates using a known correction parameter in which the rotational deviation and the resolution difference do not include individual differences. After detecting the contact with the measurement point 202 for the first measurement, the operator 206 is moved by a user operation without any contact, and the calibration is completed when all the measurement points and the operator 206 overlap each other. Note that the arrangement, shape, and number of measurement points, and the shape of the operation element 206 are not limited to those shown in FIG.

  FIG. 3 is an example of a screen after completion of calibration in the first embodiment of the present invention. The display screen 201 displays initial measurement measurement points 202 and measurement point overlap coordinate detection measurement points 203, 204, and 205. Each measurement point is described in a different color to indicate that the measurement has been completed. is doing. Further, the touch input coordinates detected by the contact with the measurement point for initial measurement 202 are (PX0, PY0), and the touch input coordinates 301 when the operator 206 is overlapped with the measurement point overlap measurement point for measurement 203 are (PX1, PY1), touch input coordinates 302 when the operator 206 overlaps the measurement point overlap coordinate detection measurement point 204 (PX2, PY2), and when the operator 206 overlaps the measurement point overlap coordinate detection measurement point 205. Let the touch input coordinates 303 be (PX3, PY3). In FIG. 3, a deviation that cannot be corrected by a known correction parameter used when displaying the operation element 206 due to an individual difference of the input device occurs, and the measurement point overlap coordinate detection measurement point 203 and the touch input coordinate 301 do not overlap. Shows the case.

  A correction value calculation method and a correction method from touch input coordinates to display coordinates will be described below using the calibration measurement results shown in FIG.

  In order to obtain the positional deviation Gp, touch input coordinates (PXi, PYi) that are assumed to be the display coordinates (x0, y0) of the measurement point 202 for the first measurement are determined in advance. For example, when the display coordinates (x0, y0) are set so that the first measurement point 202 is displayed at the center of the touch panel, the touch input coordinate ranges output by the touch panel are x-axis: 0 to 999, y-axis: In the case of 0 to 999, the touch input coordinates (PXi, PYi) at the initial measurement point 202 are (500, 500). Using this, the positional deviation Gp can be obtained by (Equation 1) and (Equation 2).

  Misalignment (x-axis direction)

  Misalignment (y-axis direction)

  The rotation deviation Ga is considered to be a positive angle when the x-axis and y-axis of the display coordinates are rotated clockwise with respect to the x-axis and y-axis of the touch input coordinates. In the example of FIG. 3, since the display coordinates are rotated counterclockwise with respect to the touch input coordinates, the rotation deviation Ga is a negative angle. The rotation deviation Ga is a line segment formed by display coordinates of two arbitrary measurement points in the measurement point for initial measurement or the measurement point overlapping coordinate detection point, and two touch detection coordinates corresponding to the two measurement points. The angle formed by the line segment. Here, an example of calculation using measurement point overlapping coordinate detection measurement points 203 and 204 and touch input coordinates 301 and 302 shown in FIG. 3 as the two measurement points will be described. Further, the touch input coordinates that are assumed to be the display coordinates (x1, y1) and (x2, y2) of the measurement points 203 and 204 for detecting the measurement point overlap coordinates when corrected with known parameters are (PX1d, PY1d), ( PX2d, PY2d), coordinate change from touch input coordinates (PX1, PY1) to (PX2, PY2) is (VX, VY), coordinates from expected touch input coordinates (PX1d, PY1d) to (PX2d, PY2d) When the change is (VXd, VYd), the rotational deviation Ga can be obtained by (Equation 3).

  Rotational deviation

  Here, the rotational deviation Ga is obtained as an angle, but the sine and cosine of the rotational deviation Ga may be calculated.

  The resolution difference Gr is obtained for each of the x axis and the y axis. Since the distance between the measurement points and the physical distance between the touch input coordinates at which the measurement was made are equal, select two lines that are not parallel to each other from the line segments connecting the two measurement points. The distance between the touch input coordinates and the distance between the touch input coordinates is obtained, and the coefficient applied to the touch input coordinates so that they are equal is the resolution difference Gr. In FIG. 3, a line segment connecting measurement point overlap coordinate detection measurement point 203 and measurement point overlap coordinate detection measurement point 204, and measurement point overlap coordinate detection measurement point 204 and measurement point overlap coordinate detection measurement point 205 are shown. When the connected line segments are used, the resolution difference Gr can be obtained by (Equation 4) and (Equation 5).

  Resolution difference (x-axis direction)

  Resolution difference (y-axis direction)

  A method for correcting the touch input coordinates by using the positional deviation Gp, the rotational deviation Ga, and the resolution difference Gr obtained above to obtain the corresponding display coordinates will be described below. The touch input coordinates to be corrected are (PX, PY), and the display coordinates after correction are (lx, ly).

  The coordinates (A ′, B ′) obtained by projecting the coordinates (A, B) of a certain coordinate system onto another coordinate system having the same origin and rotating by the angle θ are generally expressed by the following (Equation 6) and ( It can be calculated by Equation 7).

  When correcting the positional deviation and the rotational deviation, the touch input coordinates (PXr, PYr) after correcting the positional deviation and the rotational deviation are (several) when the center of rotation is placed at the measurement point for initial measurement 202 for obtaining the positional deviation Gp. By using 6) and (Equation 7), the following (Equation 8) and (Equation 9) can be used for calculation.

  Finally, conversion from touch input coordinates to display coordinates is performed using the resolution difference Gr. If the display coordinates at the measurement point 202 for the first measurement are (xi, yi), the touch input coordinates (PX, PY) are converted to the display coordinates (lx, ly) by touch input coordinates ( By calculating the distance from PXi, PYi) to the touch input coordinates (PXr, PYr) after the rotational deviation correction to the distance in the display coordinates by the resolution difference Gr, the following (Equation 10) and (Equation 11) are calculated. can do.

  Next, the configuration of the input device that performs the above-described correction value calculation method and the correction method from touch input coordinates to display coordinates will be described.

  FIG. 4 is a block diagram illustrating a schematic configuration of the input device 400 according to the first embodiment of the present invention.

  An input device 400 shown in FIG. 4 includes a sensor 401, a coordinate acquisition unit 402, a correction control unit 403, an operator control unit 404, an initial measurement coordinate detection unit 405, a measurement point overlap coordinate detection unit 406, a measurement point verification unit 407, a coordinate A storage unit 408, a correction value calculation unit 409, a correction value storage unit 410, a coordinate correction unit 411, an application processing unit 412, and a display unit 413 are provided. Note that the sensor 401 and the coordinate acquisition unit 402 are collectively referred to as a contact coordinate acquisition unit.

  The sensor 401 converts that the user has touched the sensor 401 into another physical event. For example, it is a touch panel such as a capacitance type or a resistance film type, and converts the contact with the user into an electric signal.

  The coordinate acquisition unit 402 detects a change in a physical event of the sensor 401 and converts the change into a coordinate on the sensor 401.

  The contact coordinate acquisition unit has two functions of a sensor 401 and a coordinate acquisition unit 402. That is, the contact coordinate acquisition unit acquires touch input coordinates (coordinates on the sensor 401) that are coordinates corresponding to the touched position as a whole.

The correction control unit 403 determines whether calibration is being performed, determines the processing method of the touch input coordinates acquired from the coordinate acquisition unit 402, and if the calibration is being performed, the operator control unit 404, the first measurement coordinates The touch input coordinates are notified to the detection unit 405 and the measurement point overlap coordinate detection unit 406. The measurement point overlap coordinate detection unit 406 is also notified of the display coordinates of the operation unit 206 updated by the operation unit control unit 404. When calibration is completed, the correction value calculation unit 409 is notified of a correction value calculation request. If calibration is not being performed, the coordinate correction unit 411 is notified of the previous touch input coordinates.
The operator control unit 404 displays the operator 206 so as to overlap the measurement point for initial measurement 202 when the user touches the sensor 401. In addition, the latest touch input coordinates obtained from the coordinate acquisition unit 402 and the touch input coordinates detected in the first measurement are moved to the position on the display unit 413 using the known parameters before correction. And the display of the operator 206 is updated.

  The initial measurement coordinate detection unit 405 measures touch input coordinates for obtaining the positional deviation Gp. For example, in FIG. 3, the touch input coordinates corresponding to the measurement point 202 for the first measurement are detected.

  The measurement point overlap coordinate detection unit 406 measures touch input coordinates for obtaining the rotation deviation Ga and the resolution difference Gr. The measurement point overlapping coordinate detection unit 406 detects the touch input coordinates at that time as measurement coordinates when it is determined that the operator 206 acquired from the correction control unit 403 overlaps each measurement point overlapping coordinate detection measurement point.

  The measurement point matching unit 407 determines whether the touch input coordinates acquired from the initial measurement coordinate detection unit 405 and the display coordinates of the operator 206 acquired from the measurement point overlap coordinate detection unit 406 match the measurement points.

  The coordinate storage unit 408 stores the touch input coordinates detected as the measurement coordinates by the initial measurement coordinate detection unit 405 and the measurement point overlap coordinate detection unit 406 together with measurement point information.

  The correction value calculation unit 409 acquires the measurement coordinates from the coordinate storage unit 408 based on the correction value calculation request notified from the correction control unit 403 after the measurement of all measurement points is completed, and the positional deviation Gp, the rotational deviation Ga, The resolution difference Gr is calculated. That is, the correction value calculation unit 409 calculates a correction parameter for correcting the touch input coordinates based on the initial measurement coordinates and the measurement point overlap coordinates. Specifically, the correction value calculation unit 409 calculates the positional deviation between the sensor 401 of the contact coordinate acquisition unit and the display unit 413 based on the initial measurement coordinates. In addition, the correction value calculation unit 409 detects the one detected by the measurement point overlap coordinate detection unit 406 when the coordinate acquisition unit 402 continues to acquire coordinates after the initial measurement coordinate detection unit 405 detects the first measurement coordinates. Based on the above measurement point overlap coordinates, the rotational deviation Ga and the resolution difference Gr between the sensor 401 of the contact coordinate acquisition unit and the display unit 413 are calculated.

  The correction value storage unit 410 stores the positional deviation Gp, the rotation deviation Ga, and the resolution difference Gr calculated by the correction value calculation unit 409.

  The coordinate correction unit 411 performs processing for converting the touch input coordinates acquired from the correction control unit 403 into display coordinates using the correction parameters of the positional deviation Gp, the rotational deviation Ga, and the resolution difference Gr acquired from the correction value storage unit 410. Do.

  The application processing unit 412 performs screen image creation processing according to the display coordinates acquired from the coordinate correction unit 411.

  The display unit 413 displays the screen image output from the application processing unit 412. For example, an LCD. In addition, the operator 206 updated by the operator controller 404 is displayed.

  FIG. 5A shows the configuration of the measurement point matching unit 407 for the first measurement according to the first embodiment of the present invention. The measurement point verification unit 407 holds a touch input coordinate range in which the initial measurement is successful. The measurement point verification unit 407 compares the touch input coordinates acquired from the initial measurement coordinate detection unit 405 and the range of the held touch input coordinates, and if it is within the range, the measurement point of the first measurement is the first measurement point. It outputs to the coordinate detection part 405.

  FIG. 5B shows the configuration of the measurement point matching unit 407 for measuring the measurement point overlap coordinates in the first embodiment of the present invention. The measurement point verification unit 407 holds the measurement position number and the display coordinates that specify the measurement point for measurement point overlap coordinate detection. The measurement point matching unit 407 compares the display coordinates of the operator 206 acquired from the measurement point overlap coordinate detection unit 406 with the display coordinates of each measurement point held, and if there is a match, displays the measurement point. The coordinates and the measurement position number are output to the measurement point overlap coordinate detection unit 406.

  FIG. 6 shows a configuration of the coordinate storage unit 408 in the first embodiment of the present invention. The coordinate storage unit 408 holds a measurement position number, display coordinates of measurement points, and measured touch input coordinates.

  FIG. 7 shows a configuration of the correction value storage unit 410 according to the first embodiment of the present invention. The correction value storage unit 410 holds the positional deviation Gp, the rotational deviation Ga, and the resolution difference Gr for each of the x axis and the y axis.

  Next, the operation of the input device 400 having the above configuration will be described.

  FIG. 8 is a flowchart showing the operation of the correction control unit 403 in the first embodiment of the present invention.

  The correction control unit 403 determines whether calibration is being performed (step S801). If calibration is being performed (Yes in step S801), it is determined whether or not the first measurement has been performed (step S802). When the first measurement is not performed (Yes in step S802), the first measurement coordinate detection unit 405 is notified of the touch input coordinates acquired from the coordinate acquisition unit 402, and the first measurement for obtaining the positional deviation Gp is performed (step S803). . When the initial measurement is successful (Yes in step S804), the operator control unit 404 displays the operator 206 on the display coordinates of the measurement points for initial measurement (step S805), and the initial measurement is already performed (step S806). ). On the other hand, if the initial measurement fails (No in step S804), the calibration is continued without doing anything. When the first measurement has been performed (No in step S802), the display position of the operation element 206 is updated by the operation element control unit 404 according to the touch input coordinates acquired from the coordinate acquisition unit 402 (step S807). After updating the display of the operation element 206, the measurement point overlap coordinate detection unit 406 is notified of the touch input coordinates acquired from the coordinate acquisition unit 402 and the display coordinates of the operation element 206, and the measurement for obtaining the rotation deviation Ga and the resolution difference Gr. Point overlap coordinates are measured (step S808). When measurement of measurement point overlap coordinates is completed at all measurement point overlap coordinate detection measurement points (Yes in step S809), a correction value calculation request is output to the correction value calculation unit 409 (step S810). After the correction value calculation in the correction value calculation unit 409 is completed, the calibration is finished (step S811). When the calibration is not performed (No in step S801), the coordinate correction unit 411 is notified of the touch input coordinates acquired from the coordinate acquisition unit 402 and outputs a coordinate correction request.

  FIG. 9 is a flowchart showing the operation of the initial measurement coordinate detection unit 405 in the first embodiment of the present invention.

  The first measurement coordinate detection unit 405 notifies the measurement point collation unit 407 of the touch input coordinates acquired from the correction control unit 403, and collates whether it is a measurement point of the first measurement (step S901). When the measurement point is the first measurement point (Yes in step S902), the measurement position number of the measurement point used in the first measurement, the display coordinates of the measurement point, and the touch input coordinates are stored in the coordinate storage unit 408 (step S903). The initial measurement is successful (step S904). On the other hand, when it is determined that the measurement point is not the first measurement point (step S905), the first measurement is failed (step S905).

  FIG. 10 is a flowchart showing the operation of the measurement point overlap coordinate detection unit 406 in the first embodiment of the present invention.

  The measurement point overlap coordinate detection unit 406 notifies the measurement point collation unit 407 of the display coordinates of the operator 206 acquired from the correction control unit 403, and collates whether the measurement point overlap coordinate detection measurement point is detected (step S1001). . If the measurement point is a measurement point for detecting overlapping coordinates (Yes in step S1002), the measurement position number of the measurement point used in the measurement, the display coordinates of the operation element 206, and the touch input coordinates are stored in the coordinate storage unit 408 (step S1002). S1003). When measurement is performed at all measurement point overlapping coordinate measurement points (Yes in step S1004), the measurement is completed (step S1005). On the other hand, when there is a measurement point for measuring measurement point overlapping coordinates that has not been measured (No in step S1004), or when the display coordinates of the operator 206 are different from the measurement points for detecting measurement point overlapping coordinates (No in step S1002). The measurement is continued (step S1006). When the display coordinates of the operator 206 overlap with the measurement point overlapping coordinate detection measurement point in the measurement point matching unit 407, the design of the measurement point overlapping coordinate detection measurement point such as the color or pattern is changed, the speaker You may alert | report to a user by ringing, the light emission of a lamp | ramp, the vibration of a terminal, etc.

  According to the input device 400 of this embodiment as described above, the touch input coordinates are automatically measured by overlapping the operation element 206 on the display unit 413 and the measurement point, thereby detecting the rotation deviation Ga and the resolution difference Gr as errors. Can be calculated without.

(Embodiment 2)
FIG. 11 shows the shape of the measurement point in the second embodiment of the present invention. The four circles shown in FIG. 11A are measurement points 1101, 1102, 1103, and 1104 having the same shape and arranged with their centers shifted. By arranging measurement points such as measurement points 1101, 1102, 1103, and 1104 without a gap, a measurement point set 1105 that can be recognized as a single figure in which a plurality of measurement points are gathered as shown by the hatched portion in FIG. It becomes. Even if the operator 206 moves to overlap the measurement point set 1105 from any direction, if the operator 206 completely moves to the position included in the measurement point set 1105, one measurement point in the measurement point set 1105 Always overlap. For example, FIG. 11B shows that the measurement point 1106 at the lower right of the measurement point set 1105 overlaps with the operator 206, and the display coordinates of the measurement point 1106 are (xi, yi). FIG. 11C shows that the measurement point 1107 at the upper left of the measurement point set 1105 overlaps with the operator 206, and the display coordinates of the measurement point 1107 are (xj, yj). Measurement is performed when the operator 206 overlaps any one of the measurement points.

  FIG. 12 is a block diagram showing a schematic configuration of the input device according to the second embodiment of the present invention. The input device 1200 shown in FIG. 12 is different from the input device 400 of the first embodiment in that the measurement point verification unit 407 is replaced with the measurement point verification unit 1201. In the input device 1200 illustrated in FIG. 12, the same components as those of the input device 400 illustrated in FIG. 4 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  The measurement point matching unit 1201 determines whether the touch input coordinates acquired from the initial measurement coordinate detection unit 405 and the display coordinates of the operation unit 206 acquired from the measurement point overlap coordinate detection unit 406 match any one of the measurement point sets. judge. That is, when the display coordinates of the operation element 206 coincide with any one of the measurement point sets, it is determined that the operation element 206 has moved to a position completely included in the measurement point set.

  FIG. 13 shows the configuration of the measurement point verification unit 1201 for measuring the measurement point overlap coordinates in the second embodiment of the present invention. The measurement point verification unit 1201 holds a measurement point number that specifies a measurement point for measurement point overlap coordinate detection, a display coordinate of the measurement point, and a measurement position number that specifies which measurement point set the measurement point belongs to. The measurement point verification unit 1201 compares the display coordinates of the operator 206 acquired from the measurement point overlap coordinate detection unit 406 with the display coordinates of each measurement point held, and if there is a match, displays the measurement point. The coordinates and the measurement position number are output to the measurement point overlap coordinate detection unit 406.

  According to the input device 1200 of this embodiment, by using the measurement point set, the operation element 206 on the display unit 413 does not need to overlap strictly with the measurement point, and is automatically touched when entering a certain range. Since the input coordinates can be measured, the user can easily perform calibration.

(Embodiment 3)
FIG. 14 is an example of a calibration execution screen in the third embodiment of the present invention. Only the first measurement point 202 used for the first measurement is displayed on the display screen 201. Measurement point overlapping coordinate detection measurement points are prepared on the display screen 201 without any gaps, but are not displayed on the display screen 201. Since any display coordinate can be a measurement point for measuring point overlap coordinate detection, it is possible to automatically measure at any coordinate that the operator 206 has passed. When the operator 206 passes through the display coordinates (x1, y1), (x2, y2), (x3, y3), the measurement is performed with the coordinates as measurement point overlapping coordinate detection measurement points 1401, 1402, 1403. In FIG. 14, the number of measurement points dynamically determined is three, but the position and number of measurement points are not limited.

  FIG. 15 is a block diagram showing a schematic configuration of an input device according to the third embodiment of the present invention. The input device 1500 shown in FIG. 15 is different from the input device 400 of the first embodiment in that the measurement point overlap coordinate detection unit 406 is replaced with the measurement point overlap coordinate detection unit 1501, and the measurement point collation unit 407. Is different from the measurement point matching unit 1502 in that the correction value calculation unit 409 is replaced with the correction value calculation unit 1503. In the input device 1500 shown in FIG. 15, the same components as those of the input device 400 shown in FIG. 4 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  The measurement point overlapping coordinate detection unit 1501 dynamically determines a measurement point and notifies the coordinate storage unit 408 of the measurement point. For dynamic measurement point determination, a distance threshold that determines the minimum distance from the operator 206 measured in the past and a time threshold that determines the minimum elapsed time from the time when the measurement was performed immediately before are used. The measurement point overlap coordinate detection unit 1501 detects when the movement distance from the display coordinates of the operator 206 measured in the past is equal to or greater than the distance threshold, and the elapsed time since the last measurement is performed is equal to or greater than the time threshold. The display coordinates and touch input coordinates of the operator 206 acquired from the correction control unit 403 are automatically determined as measurement points.

  Since the measurement point collation unit 1502 does not need to collate the measurement points from the measurement point overlap coordinate detection unit 1501, the measurement point collation unit 1502 holds only the touch input coordinate range in which the first measurement is successful.

  After the measurement of the measurement point overlap coordinates is completed, the correction value calculation unit 1503 acquires the measurement coordinates from the coordinate storage unit 408, and calculates the positional deviation Gp, the rotation deviation Ga, and the resolution difference Gr. At this time, a measurement result suitable for calculating the correction value is extracted from the measurement coordinates acquired from the coordinate storage unit 408. For example, the measurement result of the first measurement, the measurement result of two points farthest in the x-axis direction, and the measurement result of two points farthest in the y-axis direction are extracted.

  Next, the operation of the input device 1500 having the above configuration will be described.

  FIG. 16 is a flowchart showing the operation of the measurement point overlap coordinate detection unit 1501 in the third embodiment of the present invention.

  The measurement point overlap coordinate detection unit 1501 calculates the distance between the display coordinates of the operation element 206 acquired from the correction control unit 403 and the past measurement coordinates (step S1601). If the calculated distance is more than the distance threshold (Yes in step S1602), the elapsed time from the previous measurement is calculated (step S1603). If the calculated elapsed time has exceeded the time threshold (Yes in step S1604), the display coordinates and touch input coordinates of the operation element 206 are stored in the coordinate storage unit 408 (step S1003). If it is determined that sufficient measurement has been performed to calculate the correction value (Yes in step S1705), the measurement of the measurement point overlap coordinates is completed (step S1005). Here, as a determination method of measurement completion, a region through which the operator 206 passes is determined in advance, and the measurement is completed when the operator 206 passes through all of the above regions. May be displayed on the display screen 201, and the measurement may be completed when a certain percentage or more of the area of the display screen 201 is filled with the locus of the operator 206. On the other hand, when the calculated distance is not more than the distance threshold (No in step S1602), when the calculated elapsed time has not exceeded the time threshold (No in step S1604), and when the measurement is not completed (No in step S1705), the measurement is continued (step S1006).

  According to the input device 1500 of this embodiment, by automatically determining the measurement point, it is automatically touched only by moving the operation element 206 within the display screen 201 without being aware of a specific place. Since the input coordinates can be measured, the user can easily perform calibration.

(Embodiment 4)
FIG. 17 is an example of a calibration execution screen in the fourth embodiment of the present invention. The display screen 201 is divided into a plurality of blocks, and calibration is performed individually for each block. In FIG. 17, the display screen is divided into four blocks 1701, 1702, 1703, 1704, measurement point overlapping coordinate detection measurement points 1705, 1706, 1707 are displayed in block 1701, and measurement point overlap coordinate detection measurement points 1708 are displayed in block 1702. , 1709, 1710, block 1703, measurement point overlapping coordinate detection measurement points 1711, 1712, 1713, and block 1704 display measurement point overlap coordinate detection measurement points 1714, 1715, 1716. In addition, a measurement point 202 for initial measurement common to all blocks is displayed. After the initial measurement is performed, calibration is completed by superimposing the operation element 206 on all measurement point overlapping coordinate detection measurement points in all blocks. In FIG. 17, four measurement points are arranged for each block, and three measurement point overlapping coordinate detection measurement points are arranged in each block, and the measurement points for initial measurement are arranged to be common to all blocks. The number, shape, and arrangement of measurement points for measurement and the number, shape, and arrangement of measurement points for initial measurement are not limited thereto.

  FIG. 18 is a block diagram showing a schematic configuration of an input device according to the fourth embodiment of the present invention. The input device 1800 shown in FIG. 18 is different from the input device 400 of the first embodiment in that the measurement point overlap coordinate detection unit 406 is replaced with the measurement point overlap coordinate detection unit 1801, a measurement point collation unit 407. Is replaced with the measurement point matching unit 1802, the point where the coordinate storage unit 408 is replaced with the coordinate storage unit 1803, the point where the correction value calculation unit 409 is replaced with the correction value calculation unit 1804, and the correction value storage The difference is that the unit 410 is replaced with a correction value storage unit 1805 and the coordinate correction unit 411 is replaced with a coordinate correction unit 1806. In the input device 1800 illustrated in FIG. 18, the same components as those of the input device 400 illustrated in FIG. 4 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  The measurement point overlap coordinate detection unit 1801 detects the touch input coordinates at that time as measurement coordinates when it is determined that the operator 206 overlaps each measurement point. At this time, together with the measurement position number of the measurement point, the display coordinates, and the touch input coordinates, the block number where the measurement is performed is also notified to the coordinate storage unit 1803. In addition, measurement of measurement point overlap coordinates is determined to be complete when measurement is completed at all measurement point overlap coordinate detection measurement points belonging to each block in all blocks.

  The measurement point matching unit 1802 determines whether the touch input coordinates acquired from the initial measurement coordinate detection unit 405 and the display coordinates of the operator 206 acquired from the measurement point overlap coordinate detection unit 1801 match the measurement points. When the display coordinates of the operator 206 acquired from the measurement point overlap coordinate detection unit 1801 match the display coordinates of the measurement point, the block number to which the measurement point belongs is also output to the measurement point overlap coordinate detection unit 1801.

  The coordinate storage unit 1803 stores touch input coordinates detected as measurement coordinates by the first measurement coordinate detection unit 405 and the measurement point overlap coordinate detection unit 1801 together with information on the measurement points and a block number to which the measurement points belong.

  After the measurement of all blocks and all measurement points is completed, the correction value calculation unit 1804 acquires measurement coordinates from the coordinate storage unit 1803, and calculates a positional deviation Gp, a rotation deviation Ga, and a resolution difference Gr. At this time, correction values are calculated for each block, and correction parameters for each block are calculated.

  The correction value storage unit 1805 stores the positional deviation Gp, rotational deviation Ga, and resolution difference Gr calculated by the correction value calculation unit 1804 separately for each block.

  The coordinate correction unit 1806 determines which block the touch input coordinate acquired from the correction control unit 403 belongs to, and a positional deviation Gp and a rotational deviation Ga for the block to which the touch input coordinate acquired from the correction value storage unit 1805 belongs. Then, a process of converting to display coordinates is performed using the correction parameter of the resolution difference Gr.

  FIG. 19 shows the configuration of a measurement point verification unit 1802 for measuring measurement point overlap coordinates in the fourth embodiment of the present invention. The measurement point verification unit 1802 holds a measurement position number for specifying a measurement point for measurement point overlap coordinate detection, a display coordinate of the measurement point for measurement point overlap coordinate detection, and a block number to which the measurement point for measurement point overlap coordinate detection belongs.

  FIG. 20 shows the configuration of the coordinate storage unit 1803 in the fourth embodiment of the present invention. The coordinate storage unit 1803 holds the measurement position number, the display coordinates of the measurement points for initial measurement and the measurement point overlap coordinate detection, the measured touch input coordinates, and the block number to which the measurement point belongs.

  FIG. 21 shows the configuration of the correction value storage unit 1805 in the fourth embodiment of the present invention. The correction value storage unit 1805 holds the positional deviation Gp, rotational deviation Ga, and resolution difference Gr for each of the x-axis and y-axis for each block.

  According to the input device 1800 of this embodiment, when the physical characteristics of the sensor 401 are not uniform and change depending on the location, the display screen is divided into a plurality of blocks so that the entire display screen is corrected collectively. By doing so, errors due to the physical characteristics generated can be suppressed, and correction can be performed with high accuracy.

  According to the input device of the present invention, since the user can easily perform accurate calibration, the input device is useful as an information device including an input device such as a touch panel and a display device such as an LCD.

101, 103 Measurement points 102, 104 Effective range 105, 106 Touch input coordinates 201 Display screen 202 Initial measurement measurement points 203, 204, 205 Measurement point overlap coordinate detection measurement points 206 Operators 301, 302, 303 Touch input coordinates 400 Input device 401 Sensor 402 Coordinate acquisition unit 403 Correction control unit 404 Operator control unit 405 Initial measurement coordinate detection unit 406 Measurement point overlap coordinate detection unit 407 Measurement point verification unit 408 Coordinate storage unit 409 Correction value calculation unit 410 Correction value storage unit 411 Coordinate correction unit 412 Application processing unit 413 Display unit 1101, 1102, 1103, 1104 Measurement points constituting measurement point set 1105 Measurement point set 1106, 1107 Measurement points constituting measurement point set 1200 Input device 1201 Measurement point verification unit 1401, 1402, 1 03 Measurement point overlap coordinate detection measurement point dynamically determined 1500 Input device 1501 Measurement point overlap coordinate detection unit 1502 Measurement point collation unit 1503 Correction value calculation unit 1701, 1702, 1703, 1704 Block 1705 divided display screen 1706, 1707, 1708, 1709, 1710, 1711, 1712, 1713, 1714, 1715, 1716 Measurement point overlap detection point 1800 Input device 1801 Measurement point overlap coordinate detection unit 1802 Measurement point verification unit 1803 Coordinate storage unit 1804 correction Value calculation unit 1805 Correction value storage unit 1806 Coordinate correction unit

Claims (15)

A contact coordinate acquisition unit that acquires touch input coordinates that are coordinates corresponding to the touched position;
A display unit arranged to overlap the contact coordinate acquisition unit;
In the case of the first contact after the start of calibration, an initial measurement coordinate detection unit that detects the touch input coordinates acquired by the contact coordinate acquisition unit as initial measurement coordinates;
An operator is displayed at the position of the display unit corresponding to the initial measurement coordinate detected by the initial measurement coordinate detection unit and the position of the display unit corresponding to the touch input coordinate detected by the contact coordinate acquisition unit. A controller controller;
A measurement point overlap coordinate detection unit that detects the touch input coordinates acquired by the contact coordinate acquisition unit as measurement point overlap coordinates when an operator displayed on the display unit overlaps a graphic of a predetermined measurement point. When,
Based on the initial measurement coordinates and the measurement point overlap coordinates, a correction value calculation unit for calculating a correction parameter for correcting touch input coordinates;
An input device comprising:   The input device according to claim 1, wherein the correction value calculation unit calculates a positional deviation between the contact coordinate acquisition unit and the display unit based on initial measurement coordinates.   The correction value calculation unit detects the one detected by the measurement point overlap coordinate detection unit when the contact coordinate acquisition unit continues to acquire the contact coordinates after the initial measurement coordinate detection unit detects the initial measurement coordinates. The input device according to claim 1, wherein a rotation shift and a resolution difference between the contact coordinate acquisition unit and the display unit are calculated based on the measurement point overlap coordinates.   When the measurement point overlapping coordinate detection unit succeeds in detecting the measurement point overlapping coordinate, the measurement point overlapping coordinate detection unit succeeds in detecting the measurement point overlapping coordinate by changing the design of the measurement point at which the measurement was performed. The input device according to claim 1 which notifies that.   The measurement point overlapping coordinate detection unit further includes a ringing unit, and when the measurement point overlapping coordinate detection unit succeeds in detecting the measurement point overlapping coordinate, the measurement point overlapping coordinate is successfully detected by ringing the ringing unit. The input device according to claim 1 which notifies that it carried out.   The measurement point overlapping coordinate detection unit further includes a light emitting unit, and when the measurement point overlapping coordinate detection unit succeeds in detecting the measurement point overlapping coordinate, the measurement point overlapping coordinate is successfully detected by causing the light emitting unit to emit light. The input device according to claim 1 which notifies that it carried out.   The measurement point overlap coordinate detection unit further includes a vibration unit, and when the measurement point overlap coordinate detection unit succeeds in detecting the measurement point overlap coordinate, the measurement point overlap coordinate is successfully detected by vibrating the vibration unit. The input device according to claim 1 which notifies that it carried out.   The measurement point overlap coordinate detection unit overlaps when the operator moves to a position where the operation element is completely included with respect to the measurement point set displayed so as to overlap a plurality of measurement points with their centers shifted. The input device according to claim 1, wherein one measurement point in the measurement point set is a measurement target.   The measurement point overlap coordinate detection unit detects a distance between the measurement point overlap coordinate detected by the measurement point overlap coordinate detection unit in the past and the operator from a plurality of measurement points not displayed on the display unit. The input device according to claim 1, wherein the measurement point is dynamically determined based on an elapsed time from the time when the coordinates are detected.   10. The input according to claim 9, wherein the measurement point overlap coordinate detection unit includes the measurement point overlap coordinate detection unit that completes measurement of the measurement point overlap coordinates when the operator passes through all the specific areas of the display unit. apparatus.   The measurement point overlap coordinate detection unit displays a trajectory of movement of the operation element on the display unit, and measures the measurement point overlap coordinates by filling a certain percentage or more of the area of the display unit with the trajectory of the operation element. The input device according to claim 9, further comprising the measurement point overlapping coordinate detection unit that completes the measurement.   The input device according to claim 9, wherein the correction value calculation unit calculates a correction value by extracting a set of measurement results that are farthest from measurement results of measurement point overlap coordinates measured by moving the operation element.   The display unit is divided into a plurality of blocks, the measurement point overlap coordinate detection unit measures the measurement point overlap coordinates for each block, and the correction value calculation unit is configured to measure the block based on the detected measurement point overlap coordinates. The input device according to claim 1, wherein a correction value for each is calculated. A coordinate acquisition step for acquiring touch input coordinates, which are coordinates corresponding to the touched position, and detecting the touch input coordinates acquired in the coordinate acquisition step as initial measurement coordinates in the case of the first contact after starting calibration Initial measurement coordinate detection step;
An operator display step for displaying an operator at a position corresponding to the initial measurement coordinates detected in the initial measurement coordinate detection step;
An operator display update step for moving the display position of the operator based on the touch input coordinates;
A measurement point overlap coordinate detection step of detecting the touch input coordinates acquired in the coordinate acquisition step as measurement point overlap coordinates when the operator overlaps with a graphic of a predetermined measurement point;
A correction value calculation step for calculating a correction parameter for correcting touch input coordinates based on the initial measurement coordinates and the measurement point overlap coordinates;
A calibration method for an input device comprising: In the input device,
A coordinate acquisition step of acquiring touch input coordinates which are coordinates corresponding to the touched position;
In the case of the first contact after the start of calibration, an initial measurement coordinate detection step for detecting the touch input coordinates acquired in the coordinate acquisition step as initial measurement coordinates;
An operator display step for displaying an operator at a position corresponding to the initial measurement coordinates detected in the initial measurement coordinate detection step;
An operator display update step for moving the display position of the operator based on the touch input coordinates;
A measurement point overlap coordinate detection step of detecting the touch input coordinates acquired in the coordinate acquisition step as measurement point overlap coordinates when the operator overlaps with a graphic of a predetermined measurement point;
A correction value calculation step for calculating a correction parameter for correcting touch input coordinates based on the initial measurement coordinates and the measurement point overlap coordinates;
Calibration program for running

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