JP2010250695A - Touch panel display, electronic device, correction method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To highly accurately correct a point designated on a display surface when a touch panel receives a touch input. <P>SOLUTION: The touch panel display 108 includes: a conversion part 12 for converting a signal corresponding to a touch position to a coordinate value for the display surface; and a first calculation part 13 for calculating, on receipt of the touch input with a reference point as a target, a difference between a coordinate value of the reference point and the coordinate value obtained by converting the signal detected by the touch input. The first calculation part 13 calculates a first difference in a first state and a second difference in a second state. Furthermore, the touch panel display 108 includes: a second calculation part 14 for calculating a third difference in a third state and a fourth difference in a fourth state on the basis of the first difference and the second difference; and a correction part 16 which uses one of the first difference, the second difference, the third difference, and the fourth difference to correct the converted coordinate value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a touch panel display including a touch panel, an electronic device including a touch panel display, a correction method in the touch panel display, and a program for causing the touch panel display to execute the correction method.

  Conventionally, a touch panel display including a display device such as a liquid crystal display and a touch panel attached to a display surface of the display device is known.

  By the way, in such a touch panel display, when a user performs a touch input on the touch panel in order to specify a target point on the display surface of the display device, the target point and a point specified on the display surface (hereinafter, referred to as a target point). It is not always the same as “screen designated point”. There are the following two reasons why the target point and the screen designated point do not match in this way.

  The first reason is that, at the time of manufacturing the touch panel display, the mounting position of the touch panel with respect to the display surface may deviate from the reference mounting position. Hereinafter, the deviation is referred to as “mounting deviation”.

  The second reason is that even when the user tries to touch the target point, the actual touch position may deviate from the target point due to the user's touch operation. In particular, when the user performs touch input with a finger, a portion where the finger contacts the touch panel is a part of the belly of the finger, so that the actual touch position deviates from the target point. In addition, the above-described deviation occurs depending on the angle at which the user views the touch panel.

  Therefore, conventionally, correction processing is performed at the time of shipment of the touch panel display or after shipment in order to match the target point with the screen designation point. As an apparatus or method for executing the correction processing, for example, apparatuses or methods disclosed in Patent Documents 1 to 5 can be cited.

  The control device of Patent Document 1 displays two predetermined positions on the display unit, and collects input voltage values when touch input is performed at each of the displayed two positions. Further, the control device touches the touch panel so that the position input by touch and the position displayed on the display unit coincide with each other based on the relationship between the position of the two predetermined points displayed on the display unit and the collected input voltage value. A correction value for correcting the input value from is obtained. Further, the control device corrects the touch panel input with the correction value.

  In the coordinate conversion method of Patent Document 2, marks are displayed at the middle point and the four corners on the screen, and the coordinates of the touch panel when the touch panel is touched at a position corresponding to the mark are detected. Further, in the coordinate conversion method of the cited document 2, four calibrated primary conversions for converting the coordinates of the touch panel into the coordinates of the screen in each region from the display coordinates of the mark base on the screen and the detected coordinates of the touch panel. Get the formula. Further, in the coordinate conversion method, the four conversion formulas are weighted according to the distance from the specific contact position to the boundary line, and the screen corresponding to the specific touch position is displayed using the four weighted conversion formulas. Find the coordinates.

  The information processing apparatus of Patent Literature 3 acquires an input pattern drawn by a user on a display screen. In addition, the information processing apparatus stores in advance a registration pattern corresponding to the input pattern. Further, the information processing apparatus compares the shape of the input pattern and the registered pattern with the direction of this shape. Further, the information processing apparatus calculates the degree of difference between the direction of the shape of the input pattern and the direction of the shape of the registered pattern based on the comparison result. The information processing apparatus selects the display direction of the display object displayed on the display screen from a plurality of display directions determined by the shape of the information processing apparatus, in accordance with the degree of difference.

  The screen display input device of Patent Document 4 includes a support member that supports a display screen member provided with a touch sensor member in a manner that the inclination angle of the display screen member is variable with respect to the main body housing. Further, the screen display input device includes a rotation support member that rotatably supports the display screen member with respect to the support member. Further, the screen display input device detects the rotational position of the display screen member relative to the support member. The screen display input device changes the display mode of the liquid crystal display device according to the detected rotational position. Moreover, the coordinate calibration process which a screen display input device performs is performed about a vertical display mode and a horizontal display mode, respectively. The screen display input device forms separate calibration tables for the vertical display mode and the horizontal display mode.

  The input device of Patent Document 5 includes a display device that displays an image for recognizing an input position. The input device detects the position of an object that contacts a contact detection surface provided along the display surface of the display device. Further, the input device records data indicating a difference between the detected position and the center position of the image for recognizing the input position. The input device obtains an image correction amount for recognizing the input position displayed on the display device based on the stored data.

JP-A-5-341911 JP-A-6-35608 JP 2006-350545 A JP-A-8-305494 JP 2006-127488 A

  The control device disclosed in Patent Document 1 is not configured in consideration of the above-described shift during mounting. For this reason, when there is a shift at the time of attachment and touch input is performed on the screen of the display unit from a plurality of directions, the control device cannot execute a highly accurate correction process. Note that the same can be said for the screen display input device of Patent Document 4 and the input device of Patent Document 5 as the control device.

  Further, in the coordinate conversion method of Patent Document 2, in order to perform the correction process, the user needs to press down a total of 20 measurement points. In addition, the coordinate conversion method is not configured in consideration of a mounting time deviation, similar to the control device. For this reason, the image conversion method cannot execute a highly accurate correction process.

  In addition, the information processing apparatus of Patent Document 3 can execute correction processing only in one of the X-axis direction and the Y-axis direction. Moreover, since the information processing apparatus performs correction using a predetermined difference, correction with high accuracy cannot be performed.

  The present invention has been made in view of the above problems, and its purpose is when the touch panel accepts touch input even when the touch panel mounting position with respect to the display surface is deviated from the reference mounting position. Another object of the present invention is to provide a touch panel display, an electronic device, a correction method, and a program capable of correcting a point specified on the display surface with high accuracy.

  According to an aspect of the present invention, the touch panel display is a touch panel display that includes a display device and a touch panel attached to the display surface of the display device, and is based on receiving a touch input to the touch panel. Detecting means for detecting a signal according to the above, a converting means for converting the detected signal into a coordinate value in a predetermined coordinate system with respect to the display surface, and a display control means for displaying a reference point on the display surface; Based on the fact that the touch input targeting the reference point is received in a state where the reference point is displayed, the coordinate value of the reference point and the signal detected by the touch input are converted by the conversion means. First calculating means for calculating a difference from the coordinate value. A state in which the touch panel display is rotated 90 degrees from the first state about the normal of the display surface as the second state is a second state, and a state in which the touch panel display is further rotated 90 degrees in the rotation direction from the second state is a third state. And a state in which the touch panel display is further rotated 90 degrees in the rotation direction from the third state is referred to as a fourth state. The first calculation means is a difference when the touch input targeting the reference point in the first state is received and the difference when the touch input targeting the reference point is received in the second state. A certain second difference is calculated. Based on the first difference and the second difference, the touch panel display targets the reference point in the third difference and the fourth state, which are differences when it is assumed that touch input targeting the reference point in the third state is accepted. The second calculation means for calculating the fourth difference that is the difference when it is assumed that the touch input is accepted, and any one of the first difference, the second difference, the third difference, and the fourth difference is used. Correction means for correcting the coordinate values after conversion.

  Preferably, in the touch panel display, the touch input after the acceleration sensor and the third difference and the fourth difference are calculated is in any of the first state, the second state, the third state, and the fourth state. Judgment means for judging whether it has been performed based on the detection result of the acceleration sensor. When it is determined that the touch input is performed in the first state, the correcting unit corrects the converted coordinate value using the first difference, and when the touch input is determined to be performed in the second state. The second difference is used to correct the converted coordinate value, and when it is determined that the touch input is performed in the third state, the third difference is used to correct the converted coordinate value, When it is determined that the touch input is performed in the fourth state, the coordinate value after conversion is corrected using the fourth difference.

  Preferably, the second calculation means, based on the first difference and the second difference, a shift amount of the touch position on the touch panel with respect to the reference point, and a shift from the reference point caused when the touch panel is attached to the display surface. The third difference and the fourth difference are calculated based on the two calculated shift amounts.

Preferably, the display control means displays the reference point at the center of the display surface.
Preferably, the touch panel display further includes a dividing unit that virtually divides the display surface into a plurality of regions. The display control means displays the reference point in each area. The first calculation means calculates a first difference and a second difference in each region. The second calculation means calculates a third difference and a fourth difference in each region based on the first difference and the second difference calculated in each region. The correction unit performs correction using any one of the first difference, the second difference, the third difference, and the fourth difference calculated in the area where the touch input is performed.

Preferably, the dividing unit virtually divides the display surface into a plurality of regions in a matrix.
Preferably, the display control means displays the reference point at the center of each region.

When the other situation of this invention is followed, an electronic device is provided with said touchscreen display.
According to still another aspect of the present invention, the correction method is a correction method in a touch panel display including a display device and a touch panel attached to the display surface of the display device, and is based on accepting touch input to the touch panel. Detecting a signal corresponding to the touch position; converting the detected signal into a coordinate value in a coordinate system predetermined for the display surface; and displaying a reference point on the display surface; Coordinates obtained by converting the coordinate value of the reference point and the signal detected by the touch input by the conversion means based on receiving the touch input targeting the reference point in a state where the reference point is displayed. Calculating a difference from the value. A state in which the touch panel display is rotated 90 degrees from the first state about the normal of the display surface as the second state is a second state, and a state in which the touch panel display is further rotated 90 degrees in the rotation direction from the second state is a third state And a state in which the touch panel display is further rotated 90 degrees in the rotation direction from the third state is referred to as a fourth state. The step of calculating the difference includes a first difference that is a difference when a touch input targeting the reference point is received in the first state, and a difference when a touch input that targets the reference point is received in the second state. And calculating a second difference which is In the correction method, based on the first difference and the second difference, the third difference that is a difference when it is assumed that a touch input targeting the reference point in the third state is accepted, and the reference point is targeted in the fourth state. A step of calculating a fourth difference that is a difference when it is assumed that the touch input is accepted, and conversion is performed using any one of the first difference, the second difference, the third difference, and the fourth difference. And a step of correcting subsequent coordinate values.

  According to still another aspect of the present invention, the program is a program for executing a correction method in a touch panel display including a display device and a touch panel attached to the display surface of the display device. Detecting a signal corresponding to the touch position based on receiving a touch input to the display, converting the detected signal into a coordinate value in a predetermined coordinate system with respect to the display surface, and a display surface The reference point is displayed on the screen, and the coordinate value of the reference point and the signal detected by the touch input are converted based on receiving the touch input targeting the reference point while the reference point is displayed. A step of calculating a difference from a coordinate value obtained by conversion by means. A state in which the touch panel display is rotated 90 degrees from the first state about the normal of the display surface as the second state is a second state, and a state in which the touch panel display is further rotated 90 degrees in the rotation direction from the second state is a third state. And a state in which the touch panel display is further rotated 90 degrees in the rotation direction from the third state is referred to as a fourth state. The step of calculating the difference includes a first difference that is a difference when a touch input targeting the reference point is received in the first state, and a difference when a touch input that targets the reference point is received in the second state. And calculating a second difference which is In the correction method, based on the first difference and the second difference, the third difference that is a difference when it is assumed that a touch input targeting the reference point in the third state is accepted, and the reference point is targeted in the fourth state. A step of calculating a fourth difference that is a difference when it is assumed that the touch input is accepted, and conversion is performed using any one of the first difference, the second difference, the third difference, and the fourth difference. And a step of correcting subsequent coordinate values.

  Even when the touch panel mounting position with respect to the display surface is deviated from the reference mounting position, when the touch panel accepts touch input, the point actually specified on the display surface can be corrected with high accuracy. .

It is the figure which showed the external appearance of the mobile phone. It is the figure which showed the hardware constitutions of the mobile telephone. It is a figure for explaining the 1st gap, the 2nd gap, and the 3rd gap. It is a figure for demonstrating the 1st shift. It is a figure for explaining the 2nd gap. It is the figure which showed the functional block of the touchscreen display. It is the figure which showed the image displayed on a display surface when measuring a 3rd shift | offset | difference. It is the flowchart which showed the flow of the process until correction amount is calculated. It is the figure which showed the flow of the correction process performed with a mobile telephone, after the correction amount of 4 directions is stored in ROM. FIG. 9 is a flowchart showing a processing flow until a correction amount is calculated, and showing a processing flow different from FIG. It is a functional block diagram of another touch panel display. It is the figure which showed the state which divided | segmented the display surface of the liquid crystal panel into four area | regions. It is the figure which showed the 1st shift | offset | difference in each area | region after a division | segmentation. It is the figure which showed the image displayed on a display surface when measuring 3rd deviation | shift in each area | region. It is a figure for demonstrating the method of canceling that the correction amount changes rapidly.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  In this embodiment, a mobile phone is described as an example of the electronic device. The electronic device is not limited to a mobile phone, and may be a PDA (Personal Digital Assistant), a notebook personal computer, an AV (Audio Visual) device, an FA (Factory Automation) device, a copier, or the like.

<Appearance of mobile phone 1>
FIG. 1 is a diagram showing an appearance of the mobile phone 1. Referring to FIG. 1, mobile phone 1 includes a microphone 105, operation keys 107, a touch panel display 108, an earphone 109, and a camera (not shown).

  The mobile phone 1 includes a first housing 1A and a second housing 1B. The first casing 1A and the second casing 1B are foldably connected by a biaxial hinge 1C. The first housing 1A includes a touch panel display 108 and an earphone 109. The second casing 1B includes operation keys 107, a microphone 105, and a camera. The mobile phone 1 is not necessarily limited to a foldable device. For example, the mobile phone 1 may be a straight type device. Alternatively, the mobile phone 1 may be a slide type device.

<Hardware configuration of mobile phone 1>
FIG. 2 is a diagram illustrating a hardware configuration of the mobile phone 1. Referring to FIG. 2, a mobile phone 1 includes a CPU (Central Processing Unit) 100, a RAM (Random Access Memory) 101, a ROM (Read-Only Memory) 102, a communication unit 103, a camera 104, a microphone, and the like. 105, a speaker 106, operation keys 107, a touch panel display 108, and an earphone 109. Each component is connected to each other by a data bus 110.

  The CPU 100 controls the operation of the mobile phone 1. CPU 100 executes a program stored in ROM 192, for example. The operation key 107 receives an instruction input by the user of the mobile phone 1. The RAM 101 volatilely stores data generated by executing a program by the CPU 100 or data input through the operation keys 107. The ROM 102 stores data in a nonvolatile manner. The ROM 102 is a ROM capable of writing and erasing, such as an EPROM (Erasable Programmable Read-Only Memory) and a flash memory. The communication unit 103 performs wireless communication with other electronic devices (not shown). Although not shown in FIG. 2, the mobile phone 1 may be configured to include an interface (IF) for connecting to another electronic device by wire.

  The camera 104 shoots a subject in response to a user's operation key operation. The image data of the photographed subject is stored in the RAM 102 or an external memory (for example, a memory card). The microphone 105 receives an input of a user's voice. The cellular phone 1 digitizes the input voice (analog data). Then, the mobile phone 1 sends the digitized voice to a communication partner (for example, another mobile phone). The speaker 106 outputs sound based on, for example, music data stored in the RAM 101. Earphone 109 outputs the voice transmitted from the communication partner.

  The touch panel display 108 includes a CPU 181, a RAM 182, a liquid crystal panel 183, an A / D (Analog / Digital) converter 184, a touch panel 185, an acceleration sensor 186, and a ROM 187.

  The CPU 181 controls the operation of the touch panel display. The CPU 181 executes a program stored in the ROM 187, for example. The RAM 182 stores data generated by the execution of the program by the CPU 181 in a volatile manner. The ROM 187 stores data in a nonvolatile manner. The ROM 187 is a ROM capable of writing and erasing, such as an EPROM (Erasable Programmable Read-Only Memory) and a flash memory.

  The liquid crystal panel 183 displays images stored in the ROM 102, RAM 101, ROM 187, and RAM 182. The contents displayed on the liquid crystal panel 183 will be described later. Note that the mobile phone 1 may be configured to include a display panel (for example, organic EL) other than the liquid crystal panel instead of the liquid crystal panel 183.

  The touch panel 185 receives a touch input with a user's finger or a stylus pen. The touch panel 185 generates an analog signal corresponding to the touch position based on the touch input. The A / D converter 184 converts the analog signal into a digital signal. The CPU 181 obtains coordinate values in a predetermined coordinate system for the display surface of the liquid crystal panel 183 based on the digital signal. When the coordinate value is obtained, the mobile phone 1 executes processing according to the obtained coordinate value (that is, the position designated by the user). Note that data indicating the relationship between the value of the digital signal and the coordinate value is stored in advance in the ROM 187 or the like.

  The acceleration sensor 186 is a sensor that measures the acceleration of the touch panel display 108. That is, the acceleration sensor 186 is also a sensor that measures the acceleration of the mobile phone 1. The output of the acceleration sensor 186 is sent to the CPU 181. The acceleration sensor 186 does not need to be provided in the touch panel display 108, and may be provided in the mobile phone 1.

  By the way, the processing in the mobile phone 1 is realized by each hardware and software executed by the CPUs 100 and 181. Such software may be stored in the ROMs 102 and 187 in advance. The software may be stored in a storage medium and distributed as a program product. Alternatively, the software may be provided as a program product that can be downloaded by an information provider connected to the so-called Internet. Such software is read from the storage medium or downloaded via the communication unit 103 or the communication IF (not shown), and then temporarily stored in the ROMs 102 and 187. The software is read from the ROMs 102 and 187 by the CPUs 100 and 181 and stored in the RAM 101 and 182 in the form of an executable program. The CPUs 100 and 181 execute the program.

  Each component other than the touch panel display 108 constituting the mobile phone 1 shown in FIG. 2 is a general one. Each hardware constituting the touch panel display 108 is also general. Therefore, it can be said that the essential part of the present invention is the RAM 101, 182, the ROM 102, 187, software stored in the storage medium, or software downloadable via a network. Since the hardware operation of mobile phone 1 is well known, detailed description will not be repeated.

The storage medium is not limited to a memory card, but is a CD-ROM, FD (Flexible Disk), hard disk, magnetic tape, cassette tape, optical disk (MO (Magnetic Optical Disc) / MD (Mini Disc) / DVD (Digital Versatile). Disc)), IC (Integrated Circuit) cards (excluding memory cards), optical cards, mask ROM, EPROM, EEPROM (Electronically Erasable Programmable Read-Only Memory), flash ROM, and other semiconductor memories, etc. It may be a medium to be used.

  The program here includes not only a program directly executable by the CPU but also a program in a source program format, a compressed program, an encrypted program, and the like.

<About deviation>
Hereinafter, a point on the display surface of the liquid crystal panel 183 that the user intends to touch is referred to as a “target point”. In addition, a point that is actually designated on the liquid crystal panel 183 when the target point is touched is referred to as a “screen designated point”. Note that the target point and the screen designation point are points on the liquid crystal panel 183, not points on the touch panel 185.

  Further, as described in the background art, even when the user tries to touch the target point, the actual touch position may deviate from the target point. In particular, when the user performs touch input with a finger, a portion where the finger contacts the touch panel is a part of the belly of the finger, so that the actual touch position deviates from the target point. In addition, the above-described deviation occurs depending on the angle at which the user views the touch panel. Such a shift of the touch position with respect to the target point that occurs during input is hereinafter referred to as a “first shift”. A vector indicating the direction and magnitude of the first shift is referred to as a “first vector”.

  Further, as described in the background art, when the touch panel display 108 is manufactured, the attachment position of the touch panel with respect to the display surface may deviate from the reference attachment position. This deviation is a deviation at the time of installation. Hereinafter, when the user intends to specify a target point, the positional shift with respect to the target point caused by the mounting time shift is referred to as a “second shift”. A vector indicating the direction and magnitude of the second shift is referred to as a “second vector”. The second vector has the opposite direction and the same size as the vector indicating the direction and magnitude of the attachment displacement.

  Hereinafter, the shift of the screen designation point with respect to the target point is referred to as a “third shift”. Furthermore, a vector indicating the direction and magnitude of the third shift is referred to as a “third vector”. In the following description, it is assumed that the third shift is caused by the first shift and the second shift.

  FIG. 3 is a diagram for explaining the first shift, the second shift, and the third shift. Referring to FIG. 3, in mobile phone 1, touch panel 185 is attached to the display surface of liquid crystal panel 183 only in the direction and size (distance) represented by vector V <b> 1 indicating a shift in attachment. It is off. Here, a case where the user tries to specify the target point 812 by touch while the icon 811 is displayed on the display surface of the liquid crystal panel 183 will be described as an example.

  In this case, the point specified by the first shift is a point shifted from the target point 812 by the direction and distance indicated by the first vector V11. That is, although the user intends to designate the target point 812, the point 821 is designated by the first deviation. Further, the point specified by the second shift is a point 813 further shifted from the point 821 by the direction and distance indicated by the second vector V12. The second vector V12 has the opposite direction and the same size as the vector V1 indicating the attachment displacement.

  As described above, although the user intends to designate the target point 812, the point 813 is designated by the first deviation and the second deviation. Thus, the screen designated point (that is, the point 813) is a point that is shifted from the target point 812 by the direction and distance indicated by the third vector V13.

  Here, the state of the mobile phone 1 is defined as follows. Referring again to FIG. 1, the state in which the user is holding the mobile phone 1 so that the microphone 105 is in front and the earphone 109 is on the microphone 105 opposite to the user is the first state. And When the mobile phone 1 is folded by the biaxial hinge 1C so that the touch panel display 108 is visible, the biaxial hinge 1C is on the front and the earphone 109 is on the biaxial hinge 1C. The state in which the user is carrying the mobile phone 1 so as to be opposite to the user is defined as a first state.

  A state in which the mobile phone 1 is rotated from the first state by 90 degrees about a normal (not shown) of the display surface as an axis is referred to as a “second state”. A state in which the mobile phone 1 is further rotated 90 degrees in the same direction from the second state is referred to as a “third state”. A state in which the mobile phone 1 is further rotated 90 degrees in the same direction from the third state is referred to as a “fourth state”. In the following, the first state, the second state, the third state, and the fourth state are respectively expressed as “0 degree direction”, “90 degree direction”, “180 degree direction”, and “270 degree direction”. Is also referred to.

  FIG. 4 is a diagram for explaining the first shift. That is, FIG. 4 is a diagram for explaining the shift of the touch position with respect to the target point that occurs during input. FIG. 4A is a diagram showing a first shift in the first state. FIG. 4B is a diagram illustrating the first shift in the second state. FIG. 4C is a diagram showing the first shift in the third state. FIG. 4D is a diagram illustrating the first shift in the fourth state. In FIG. 4, it is assumed that the direction of the first shift is a fixed direction with respect to the direction in which the user's finger is pointing.

  Referring to FIG. 4, when mobile phone 1 is in the first state, the point designated by the first deviation is indicated by first vector V111 from target point 812a that the user tried to designate with finger 900. The point is shifted by the direction and distance. That is, although the user intends to designate the target point 812a, the point 821a is designated by the first deviation. The direction of the first deviation is a positive direction with respect to the X axis and a negative direction with respect to the Y axis.

  When the mobile phone 1 is in the second state, the point specified by the first shift is shifted from the target point 812b that the user intends to specify with the finger 900 by the direction and distance indicated by the first vector V112. It becomes a point. That is, although the user intends to designate the target point 812b, the point 821b is designated by the first deviation. The direction of the first shift is a negative direction about the X axis and a negative direction about the Y axis.

  When the mobile phone 1 is in the third state, the point specified by the first shift is shifted from the target point 812c that the user intends to specify with the finger 900 by the direction and distance indicated by the first vector V113. It becomes a point. That is, although the user intends to designate the target point 812c, the point 821c is designated by the first deviation. The direction of the first shift is a negative direction with respect to the X axis and a positive direction with respect to the Y axis.

  When the mobile phone 1 is in the fourth state, the point specified by the first shift is shifted from the target point 812d that the user intends to specify with the finger 900 by the direction and distance indicated by the first vector V114. It becomes a point. That is, although the user intends to designate the target point 812d, the point 821d is designated by the first deviation. The direction of the first deviation is a positive direction with respect to the X axis and a positive direction with respect to the Y axis.

  As described above, the direction of the first shift with respect to the XY coordinates is different in the first state, the second state, the third state, and the fourth state.

  FIG. 5 is a diagram for explaining the second shift. That is, FIG. 5 is a diagram for explaining the positional deviation with respect to the target point caused by the above-described deviation at the time of attachment. FIG. 5 is also a diagram for explaining a case where the second shift is combined with the first shift. FIG. 5A is a diagram showing a second shift in the first state. FIG. 5B is a diagram illustrating the second shift in the second state. FIG. 5C is a diagram showing the second shift in the third state. FIG. 5D is a diagram showing a second shift in the fourth state. Note that the points 821a, 821b, 821c, and 821d in FIG. 5 are the same positions as the points 821a, 821b, 821c, and 821d in FIG. 4, respectively.

  Referring to FIG. 5, when the mobile phone 1 is in the first state, the point specified by the second shift is a point 813a further shifted from the point 821a by the direction and distance indicated by the second vector V121. It becomes. The direction of the second shift is a positive direction with respect to the X axis and a negative direction with respect to the Y axis.

  When the mobile phone 1 is in the second state, the point specified by the second shift is a point 813b that is further shifted from the point 821b by the direction and distance indicated by the second vector V122. The direction of the second shift is a positive direction with respect to the X axis and a negative direction with respect to the Y axis.

  When the mobile phone 1 is in the third state, the point specified by the second shift is a point 813c that is further shifted from the point 821c by the direction and distance indicated by the second vector V123. The direction of the second shift is a positive direction with respect to the X axis and a negative direction with respect to the Y axis.

  When the mobile phone 1 is in the fourth state, the point specified by the second shift is a point 813d further shifted from the point 821d by the direction and distance indicated by the second vector V124. The direction of the second shift is a positive direction with respect to the X axis and a negative direction with respect to the Y axis.

  As described above, the direction of the second shift with respect to the XY coordinates is the same in the first state, the second state, the third state, and the fourth state. The magnitude of the second shift is the same in the first state, the second state, the third state, and the fourth state.

<Functional block of touch panel display 108>
FIG. 6 is a diagram showing functional blocks of the touch panel display 108. With reference to FIG. 6, touch panel display 108 includes control unit 10. The control unit 10 is realized by the CPU 181 (see FIG. 2). The control unit 10 includes a detection unit 11, a conversion unit 12, a first calculation unit 13, a second calculation unit 14, a determination unit 15, a correction unit 16, and a display control unit 17.

  The display control unit 17 causes the liquid crystal panel 183 to display an image. An example of an image that the display control unit 17 displays on the liquid crystal panel 183 will be described later.

  The detection unit 11 detects a signal corresponding to the touch position based on receiving a touch input to the touch panel 185. The signal corresponding to the touch position is a digital signal output from the A / D converter.

  The conversion unit 12 converts the signal detected by the detection unit 11 into a coordinate value in a predetermined coordinate system with respect to the display surface of the liquid crystal panel 183. As the coordinate system, for example, there is a two-dimensional coordinate system (XY coordinate system) with the origin at the upper left or lower left of the display surface.

  The first calculation unit 13 and the second calculation unit 14 function when an instruction for measuring the direction and size of the third shift is received from the user via the operation key 107 or the like. Alternatively, the first calculation unit 13 and the second calculation unit 14 function when the mobile phone 1 is initially set.

  The first calculation unit 13 detects the coordinate value of the reference point and the touch input based on receiving the touch input targeting the reference point in a state where the reference point described later is displayed on the display surface. A difference from the coordinate value obtained by converting the digital signal by the converter 12 is calculated. Note that data indicating the relationship between the value of the digital signal and the coordinate value is stored in the ROM 187 in advance. The first calculator 13 obtains coordinate values from the digital signal based on the data. The reference point is a point displayed on the display surface of the liquid crystal panel 183 as one of the target points.

  The first calculation unit 13 obtains a first difference that is the difference when a touch input targeting the reference point is received in the first state. Further, the first calculation unit 13 calculates a second difference that is the difference when a touch input targeting the reference point is received in the second state. The first calculation unit 13 stores the calculated first difference and second difference in the RAM 182 and the ROM 187.

  Based on the first difference and the second difference stored in the RAM 182, the second calculation unit 14 is the third difference that is the difference when it is assumed that touch input targeting the reference point in the third state has been received. Is calculated. Furthermore, the second calculation unit 14 calculates a fourth difference that is the difference when it is assumed that a touch input targeting the reference point is received in the fourth state.

  More specifically, the second calculation unit 14 determines the shift amount (first shift amount) between the touch position on the touch panel 185 and the reference point based on the first difference and the second difference stored in the RAM 182, and the liquid crystal panel. A displacement amount (second displacement amount) from the reference position, which is generated when the touch panel 185 is attached to the display surface 183, is calculated. The second calculation unit 14 calculates the third difference and the fourth difference based on the two calculated shift amounts (first shift amount and second shift amount). The second calculation unit 14 stores the calculated third difference and fourth difference in the ROM 187. A specific method of calculating the third difference and the fourth difference in the second calculation unit 14 will be described later.

  As described above, the first difference, the second difference, the third difference, and the fourth difference are stored in the ROM 182 as a result of the calculation by the first calculation unit 13 and the second calculation unit 14. Note that the first difference, the second difference, the third difference, and the fourth difference are used as correction amounts that represent the direction and magnitude of the correction in the correction unit 16.

  The determination unit 15 determines which of the first state, the second state, the third state, and the fourth state the touch input after the third difference and the fourth difference are calculated in. The determination is made based on the detection result of the acceleration sensor 186. More specifically, it is determined in which of the four states the touch input after the first difference, the second difference, the third difference, and the fourth difference are stored in the ROM 182 is performed. The determination method in the determination unit 15 will be specifically described as follows.

  When the mobile phone 1 is powered on, the determination unit 15 determines that the mobile phone 1 is in the first state. When the mobile phone 1 shifts from the closed state to the open state, the determination unit 15 determines that the mobile phone 1 is in the first state. When any one of the operation keys is pressed in the sleep state, the determination unit 15 determines that the mobile phone 1 is in the first state.

  After determining the first state as described above, the determination unit 15 determines whether the mobile phone 1 is in any of the first state, the second state, the third state, and the fourth state based on the output from the acceleration sensor 186. Determine if it is in a state.

  The correction unit 16 corrects the coordinate value converted by the conversion unit 12 using any one of the first difference, the second difference, the third difference, and the fourth difference stored in the ROM 182. Specifically, when it is determined that the touch input is performed in the first state, the correction unit 16 corrects the coordinate value after the conversion using the first difference stored in the ROM 182. Further, when it is determined that the touch input is performed in the second state, the correction unit 16 corrects the converted coordinate value using the second difference. Further, when it is determined that the touch input is performed in the third state, the correction unit 16 corrects the converted coordinate value using the third difference. Further, when it is determined that the touch input is performed in the fourth state, the correction unit 16 corrects the converted coordinate value using the fourth difference.

  When the correction by the correction unit 16 is performed, the control unit 10 executes a process according to the coordinate value after the correction. For example, when the correction by the correction unit 16 is performed, the display control unit 17 causes the liquid crystal panel 183 to display the result of the process executed according to the corrected coordinate value.

<User interface>
FIG. 7 is a diagram illustrating an image displayed on the display surface when the third shift is measured. That is, FIG. 7 shows a screen (hereinafter referred to as an “adjustment screen”) that is displayed when the cellular phone 1 receives an instruction for measuring the direction and size of the third shift via the operation key 107 or the like. "). FIG. 7A is a diagram showing a state in which the reference point P1 is displayed in the first state. FIG. 7B is a diagram showing a state in which the reference point P1 is displayed in the second state. The reference point P1 is preferably displayed at the center of the display surface from the viewpoint of improving the accuracy of the correction amount.

  Referring to FIG. 7, when displaying the reference point P1, the mobile phone 1 also performs a display prompting the user to press the reference point P1. The mobile phone 1 receives the input by the user's finger 900 in the state of FIG. 7A (that is, the direction of 0 degrees), and then the state of the mobile phone 1 is the second state (that is, the direction of 90 degrees). When it changes to, the image shown in FIG.7 (b) is displayed. The mobile phone 1 further accepts an input by the user's finger 900 in the state of FIG. 7B (that is, the direction of 0 degree).

  When the user performs touch input with the finger 900 in a state where the screen of FIG. 7A is displayed, the first calculation unit 13 calculates the first difference. In addition, when the user performs touch input with the finger 900 in a state where the screen of FIG. 7B is displayed, the first calculation unit 13 calculates the second difference. Note that, as described above, the second calculation unit 14 calculates the third difference and the fourth difference based on the calculated first difference and second difference.

  As described above, the mobile phone 1 is designated on the display surface when the touch panel 108 receives a touch input even when the attachment position of the touch panel with respect to the display surface is deviated from the reference attachment position. (Screen designated point) can be corrected with high accuracy. Moreover, the user can obtain the first difference, the second difference, the third difference, and the fourth difference only by touching the display surface with the finger 900 only twice. That is, the mobile phone 1 can obtain correction amounts in four directions (a direction of 0 degrees, a direction of 90 degrees, a direction of 180 degrees, and a direction of 270 degrees) only by receiving two touch inputs. Furthermore, when the mobile phone 1 is shipped from the factory, the manufacturer of the mobile phone 1 does not need to perform correction based on the second deviation. Further, the mobile phone 1 can accurately input from four directions by the above correction. Therefore, the user can input accurately even when the cellular phone 1 is taken out from the pocket or bag.

<Specific calculation method of difference>
The first difference, the second difference, the third difference, and the fourth difference will be described using mathematical expressions. Referring to FIG. 4 again, the first shift in the first state (the shift in the touch position with respect to the target point that occurs during input) is indicated by a first vector V111 (see FIG. 4A). Here, the first vector V111 is assumed to be a vector represented by Expression (1).

V111 = (V1_0x, V1_0y) = (a, b)… (1)
Further, when the rotation matrix A (θ) shown in Expression (2) is used, the first vector V112 (see FIG. 4B) indicating the first shift in the second state is expressed by Expression (3). Similarly, the first vector V113 (see FIG. 4C) indicating the first shift in the third state and the first vector V114 indicating the first shift in the fourth state (see FIG. 4D). Are represented by equations (4) and (5), respectively.

V112 = (V1_90x, V1_90y) = A (-90 °) V111 = (b, -a)… (3)
V113 = (V1_180x, V1_180y) = A (-180 °) V111 = (-a, -b)… (4)
V114 = (V1_270x, V1_270y) = A (-270 °) V111 = (-b, a)… (5)
Referring to FIG. 5 again, the direction and magnitude of the second shift (position shift with respect to the target point caused by the mounting shift) are the same in the first state, the second state, the third state, and the fourth state. It is. Hereinafter, the second vector V121 shown in FIG. 5A, the second vector V122 shown in FIG. 5B, the second vector V123 shown in FIG. 5C, and the second vector V122 shown in FIG. The second vector V124 is expressed as Expressions (6), (7), (8), and (9), respectively.

V121 = (V2_0x, V2_0y) = (c, d)… (6)
V122 = (V2_90x, V2_90y) = (c, d)… (7)
V123 = (V2_180x, V2_180y) = (c, d)… (8)
V124 = (V2_270x, V2_270y) = (c, d)… (9)
Here, in the first state, the third vector V131 (x0, y0) indicating the third shift obtained by combining the first shift and the second shift is expressed by Expression (10). Further, the third vector V132 (x90, y90) indicating the third shift in the second state is expressed by Expression (11). The third vector V131 (x0, y0) corresponds to the first difference. The third vector V132 (x90, y90) corresponds to the second difference.

V131 = (x0, y0) = V111 + V121 = (V1_0x + V2_0x, V1_0y + V2_0y) = (a + c, b + d)… (10)
V132 = (x90, y90) = V112 + V122 = (V1_90x + V2_90x, V1_90y + V2_90y) = (b + c, -a + d)… (11)
Therefore, from the formulas (10) and (11), a, b, c, and d can be expressed by the formulas (12), (13), (14), and (15), respectively.

a = (x0 + y0-x90-y90) / 2 (12)
b = (-x0 + y0 + x90-y90) / 2 (13)
c = (x0-y0 + x90 + y90) / 2 (14)
d = (x0 + y0-x90 + y90) / 2 (15)
Therefore, the third vector V133 (x180, y180) indicating the third shift obtained by combining the first shift and the second shift in the third state can be expressed by Expression (16). Further, the third vector V134 (x270, y270) indicating the third shift in the fourth state can be expressed by Expression (17). The third vector V133 (x180, y180) corresponds to the third difference. The third vector V134 (x270, y270) corresponds to the fourth difference.

V133 = (x180, y180) = V113 + V123 = (V1_180x + V2_180x, V1_180y + V2_180y) = (-a + c, -b + d) = (-y0 + x90 + y90, x0-x90 + y90)… ( 16)
V134 = (x270, y270) = V114 + V124 = (V1_270x + V2_270x, V1_270y + V2_270y) = (-b + c, a + d) = (x0-y0 + y90, x0 + y0-x90)… (17)
As described above, the cellular telephone device 1 receives the third vector 131 indicating the third shift in the first state and the third vector 132 indicating the third shift in the second state by the user's touch input. If it can be obtained, the third vector 133 indicating the third shift in the third state and the third vector 134 indicating the third shift in the fourth state can be obtained without subsequent touch input. . Therefore, the mobile phone 1 can calculate the third difference and the fourth difference if the first difference and the second difference can be calculated. That is, if the mobile phone 1 can calculate the correction amount in two directions (the direction of 0 degrees and the direction of 90 degrees), the correction amount in the other two directions (the direction of 180 degrees and the direction of 270 degrees) can be calculated. it can.

<Control structure>
FIG. 8 is a flowchart showing the flow of processing until the correction amount is calculated. Referring to FIG. 8, in step S2, mobile phone 1 displays an input standby image including reference point P1 in the direction of 0 degrees on the adjustment screen (see FIG. 7A). In step S4, the mobile phone 1 determines whether or not a touch input has been accepted in a state where the reference point P1 is displayed.

  When it is determined that the touch input has been received (YES in step S4), the cellular phone 1 stores the coordinate value detected by the touch input in the RAM 182. On the other hand, when mobile phone 1 determines that touch input is not received (NO in step S4), the process returns to step S4.

  In step S8, the mobile phone 1 calculates the correction amount at 0 degrees. That is, the mobile phone 1 calculates the first difference indicating the third shift in the first state. In step S <b> 10, the mobile phone 1 stores the calculated correction amount at 0 degrees in the ROM 187.

  In step S12, the mobile phone 1 displays an input standby image including the reference point P1 in the direction of 90 degrees on the adjustment screen. In step S14, the mobile phone 1 determines whether or not a touch input has been accepted in a state where the reference point P1 is displayed.

  When it is determined that the touch input has been received (YES in step S14), the cellular phone 1 stores the coordinate value detected by the touch input in the RAM 182 in step S16. On the other hand, when it is determined that the mobile phone 1 does not accept touch input (NO in step S14), the process returns to step S14.

  In step S18, the mobile phone 1 calculates the correction amount at 90 degrees. That is, the mobile phone 1 calculates the second difference indicating the third shift in the second state. In step S <b> 20, the mobile phone 1 stores the calculated correction amount at 90 degrees in the ROM 187.

  In step S22, the mobile phone 1 calculates the correction amount at 180 degrees and the correction amount at 270 degrees based on the correction amount (first difference) at 0 degrees and the correction amount (second difference) at 90 degrees. . That is, the mobile phone 1 calculates the third difference indicating the third shift in the third state and the fourth difference indicating the third shift in the fourth state.

  In step S <b> 24, the mobile phone 1 stores the calculated correction amount at 180 degrees and the correction amount at 270 degrees in the ROM 187.

  FIG. 9 is a diagram showing a flow of correction processing performed by the mobile phone 1 after the correction amounts in the four directions are stored in the ROM 187. FIG. Referring to FIG. 9, in step S <b> 102, mobile phone 1 detects the direction of mobile phone 1 based on the output from acceleration sensor 186. In step S104, the mobile phone 1 determines whether or not the direction of the mobile phone 1 is a 0 degree direction based on the detection result.

  When mobile phone 1 determines that the direction is 0 degree (YES in step S104), when a touch input is received, in step S106, the coordinate value converted by conversion unit 12 is corrected to a correction amount (x0, Correct using y0). Specifically, the correction unit 16 of the mobile phone 1 subtracts the correction amount (x0, y0) from the coordinate value (x, y) converted by the conversion unit 12 to thereby obtain a corrected value (x ′, y ′) = (x−x0, y−y0) is obtained.

  If mobile phone 1 determines that the direction is not 0 degrees (NO in step S104), it determines in step S110 whether the direction of mobile phone 1 is the direction of 90 degrees based on the detection result. When the mobile phone 1 determines that the direction is 90 degrees (YES in step S110), when the touch input is received, in step S112, the coordinate value converted by the conversion unit 12 is corrected to 90 degrees (x90, y90). Specifically, the correction unit 16 of the mobile phone 1 subtracts the correction amount (x90, y90) from the coordinate value (x, y) converted by the conversion unit 12, thereby correcting the value (x ′, y ′) = (x−x90, y−y90) is obtained.

  If mobile phone 1 determines that the direction is not 90 degrees (NO in step S110), it determines in step S114 whether the direction of mobile phone 1 is a direction of 180 degrees based on the detection result. When mobile phone 1 determines that the direction is 180 degrees (YES in step S114), when a touch input is received, in step S116, the coordinate value converted by conversion unit 12 is converted into a correction amount (x180, y180). Specifically, the correction unit 16 of the mobile phone 1 subtracts the correction amount (x180, y180) from the coordinate value (x, y) converted by the conversion unit 12, thereby correcting the value (x ′, y ′) = (x−x180, y−y180) is obtained.

  When mobile phone 1 determines that the direction is not 180 degrees (NO in step S114), when it receives a touch input, in step S118, the coordinate value converted by conversion unit 12 is corrected to a correction amount (x270, y270) at 270 degrees. ) To correct. Specifically, the correction unit 16 of the mobile phone 1 subtracts the correction amount (x270, y270) from the coordinate value (x, y) converted by the conversion unit 12, thereby correcting the value (x ′, y ′) = (x−x270, y−y270) is obtained.

  In step S <b> 108, the mobile phone 1 executes processing based on touch input using the corrected values (x ′, y ′).

  In step S104, the mobile phone 1 determines whether the direction of the mobile phone 1 is a direction of 0 degrees, but the range determined to be 0 degrees may be a predetermined range. For example, the mobile phone 1 may be configured to determine 0 degree between −45 degrees and 45 degrees. In this case, the mobile phone 1 may be configured to determine 90 degrees between 45 degrees and 135 degrees. The mobile phone 1 may be configured to determine 180 degrees between 135 degrees and 225 degrees and 270 degrees between 225 degrees and 315 degrees (−45 degrees).

  FIG. 10 is a flowchart showing a processing flow until the correction amount is calculated, which is different from the processing flow shown in FIG. FIG. 10 is a flowchart illustrating processing in which the mobile phone 1 calculates the correction amount using the acceleration sensor 186. The process shown in FIG. 10 is different from the process shown in FIG. 8 that does not use the output result in that the output result of the acceleration sensor 186 is used.

  In step S <b> 202, the mobile phone 1 detects the current direction of the mobile phone 1 using the output result of the acceleration sensor 186. The mobile phone 1 receives the instruction to start the process of calculating the correction amount, and in step S204, the mobile phone 1 sets the reference point P1 in the detected direction (hereinafter referred to as “first direction”). An input standby image including is displayed. In step S206, the mobile phone 1 determines whether or not a touch input is accepted in a state where the reference point P1 is displayed.

  If mobile phone 1 determines that a touch input has been received (YES in step S206), it stores the coordinate value detected by the touch input in RAM 182 in step S208. On the other hand, when it is determined that the touch input is not received (NO in step S206), the cellular phone 1 returns the process to step S206.

  In step S210, the mobile phone 1 calculates a correction amount in the first direction. In step S <b> 212, the mobile phone 1 stores the correction amount in the first direction in the ROM 187. In step S214, the mobile phone 1 displays an instruction image for directing the mobile phone 1 in the second direction on the display surface. The second direction is a direction that is 90 degrees different from the first direction. In step S <b> 216, the mobile phone 1 detects the current direction of the mobile phone 1 using the output result from the acceleration sensor 186.

  In step S218, the mobile phone 1 determines whether or not the mobile phone 1 is facing the second direction. When mobile phone 1 determines that mobile phone 1 is facing the second direction (YES in step S218), in step S220, mobile phone 1 receives an input signal including reference point P1 in the detected direction (second direction). Display an image. If the mobile phone 1 determines that the mobile phone 1 is not facing the second direction (NO in step S218), the process returns to step S214.

  In step S222, the mobile phone 1 determines whether or not a touch input is accepted in a state where the reference point P1 is displayed.

  When mobile phone 1 determines that a touch input has been received (YES in step S222), it stores the coordinate value detected by the touch input in RAM 182 in step S224. On the other hand, when mobile phone 1 determines that touch input is not accepted (NO in step S222), the process returns to step S222. In step S226, the mobile phone 1 calculates the correction amount in the second direction. In step S228, the mobile phone 1 stores the correction amount in the second direction in the ROM 187.

  In step S230, the mobile phone 1 calculates a correction amount in the third direction and a correction amount in the fourth direction based on the correction amount in the first direction and the correction amount in the second direction. The third direction is the opposite direction to the first direction, and the fourth direction is the opposite direction to the second direction. In step S232, the mobile phone 1 stores the correction amount in the third direction and the correction amount in the fourth direction in the ROM 187.

  The first direction and the second direction are preferably directions that are frequently used by the user. The first difference and the second difference are differences obtained by actual touch input. On the other hand, the third difference and the fourth difference are data calculated from the first difference and the second difference. For this reason, the correction using the first difference or the second difference is more accurate than the correction using the third difference or the fourth difference.

<Modification>
Hereinafter, a configuration in which the mobile phone 1 can realize more accurate correction will be described. FIG. 11 is a functional block diagram of the touch panel display. Referring to FIG. 11, mobile phone 1 includes touch panel display 108 </ b> A instead of touch panel display 108.

  The touch panel display 108A includes a control unit 10A. The control unit 10A is realized by the CPU 181 (see FIG. 2). The control unit 10A includes a detection unit 11, a conversion unit 12, a first calculation unit 13, a second calculation unit 14, a determination unit 15, a correction unit 16, a display control unit 17, and a division unit 18. Prepare. The control unit 10 </ b> A is different from the control unit 10 that does not include the dividing unit 18 in that the dividing unit 18 is provided.

  The dividing unit 18 virtually divides the display surface of the liquid crystal panel 183 into a plurality of regions. More specifically, the dividing unit 18 virtually divides the display surface of the liquid crystal panel 183 into a plurality of regions in a matrix. Preferably, the dividing unit 18 virtually divides the display surface so that the sizes of the divided areas are the same.

  The display control unit 17 displays the reference point in each divided area. The first calculation unit 13 calculates the first difference and the second difference in each region. The second calculation unit 14 calculates the third difference and the fourth difference in each region based on the first difference and the second difference calculated in each region. The correction unit 16 uses any one of the first difference, the second difference, the third difference, and the fourth difference calculated in the area where the touch input is performed (one area after division). The above-described correction is performed.

  That is, 10 A of control parts calculate a 1st difference, a 2nd difference, a 3rd difference, and a 4th difference in each area | region after a division | segmentation. For each divided area, correction is performed using a correction amount set for each area.

  Thus, the reason why the mobile phone 1 obtains correction amounts in four directions in each divided region and performs correction using the correction amounts is as follows. If the touch position on the display surface of the liquid crystal panel 183 is different, the direction and size of the first shift may be different due to a user's habit or the like. Therefore, if the correction amount is set in each area by dividing the display surface into smaller areas, more accurate correction can be performed. For this reason, correction amounts in four directions are obtained in each divided area, and correction using the correction amounts is performed. Hereinafter, a case where the dividing unit 18 divides the display surface into four regions will be described as an example.

  FIG. 12 is a diagram showing a state in which the display surface of the liquid crystal panel 183 is divided into four regions M1, M2, M3, and M4. Referring to FIG. 12, the dividing unit 18 divides the display surface into a matrix (2 × 2). The region M1 is a region on the earphone 109 side and a lower left region of the earphone 109. The region M2 is a region on the earphone 109 side and a lower right region of the earphone 109. The region M3 is a region on the biaxial hinge 1C side and is a lower left region of the earphone 109. A region M4 is a region on the biaxial hinge 1C side and is a lower right region of the earphone 109.

  FIG. 13 is a diagram illustrating the first shift (touch position shift with respect to a target point that occurs during input) in each divided area. FIG. 13A is a diagram illustrating a first shift in each region in the first state. FIG. 13B is a diagram illustrating a first shift in each region in the second state. FIG. 13C is a diagram showing a first shift in each region in the third state. FIG. 13D is a diagram illustrating a first shift in each region in the fourth state. In the figure, the first deviation is indicated by an arrow.

  Referring to FIG. 13, in the first state (FIG. 13A), the first shift directions in the regions M1, M2, M3, and M4 are different from each other. The same applies to the second state, the third state, and the fourth state.

  FIG. 14 is a diagram illustrating an image displayed on the display surface when the third shift is measured in each of the regions M1, M2, M3, and M4. That is, FIG. 14 is a diagram showing an adjustment screen. FIG. 14A is a diagram showing a state in which the reference point is displayed in the first state. FIG. 14B is a diagram showing a state in which the reference point is displayed in the second state.

  Referring to FIG. 14, mobile phone 1 displays reference point P in region M1. In addition, the mobile phone 1 displays the reference points Q, R, and S in the areas M2, M3, and M4, respectively. In the case shown in FIG. 14, the user performs eight touch inputs to calculate the correction amount.

  By the way, in the above, the following problems arise when the touch position is in the vicinity of the boundary between the regions M1, M2, M3, and M4. A position near the boundary is defined as a “first position”, and a position included in an area different from the area including the first position at a position near the first position is referred to as a “second position”. And In this case, although the first position and the second position are close to each other, the correction amount may be greatly different. Therefore, a method for eliminating the sudden change in the correction amount when the touch position crosses the boundary will be described below.

  FIG. 15 is a diagram for explaining a method for eliminating a sudden change in the correction amount. Referring to FIG. 15, points P, Q, R, and S are reference points, respectively. The point p is a point (screen designation point) that is actually designated on the liquid crystal panel 183 when trying to touch the reference point P in the region M1. The point q is a point (screen designation point) that is actually designated on the liquid crystal panel 183 when trying to touch the reference point Q in the region M2. The point r is a point (screen designation point) that is actually designated on the liquid crystal panel 183 when trying to touch the reference point R in the region M3. The point s is a point (screen designation point) that is actually designated on the liquid crystal panel 183 when an attempt is made to touch the reference point S in the region M4.

  The point T is a point on a line segment connecting the point P and the point Q. The point U is a point on a line segment connecting the point R and the point S. The point W is a point on a line segment connecting the point T and the point U. It is assumed that the line segment connecting point T and point U is parallel to the line segment connecting point P and point R. The values of the X coordinates of the points T, U, and W are the same.

  In this case, the correction amount (ofst_Tx, ofst_Ty) at the point T is set to an amount represented by the equation (18). In addition, the correction amount (ofst_Ux, ofst_Uy) at the point U is set to an amount represented by Expression (19). Note that the coordinates of a point that is actually designated when the point W is touched as a target point are (x, y).

(ofst_Tx, ofst_Ty) = ((xq-xp) / (XQ-XP) × (x-XP) + xp, (yq-yp) / (XQ-XP) × (x-XP) + yp) (18 )
(ofst_Ux, ofst_Uy) = ((xs-xr) / (XQ-XP) × (x-XP) + xr, (ys-yr) / (XQ-XP) × (x-XP) + yr) (19 )
Then, the correction amount (ofst_Wx, ofst_Wy) at the point W is set to an amount represented by the equation (20).

(ofst_Wx, ofst_Wy) = ((ofst_Ux-ofst_Tx) / (YQ-YP) × (y-YP) + ofst_Tx, (ofst_Uy-ofst_Ty) / (YQ-YP) × (y-YP) + ofst_Ty)… (20 )
Thus, when the correction amount at the point W is obtained, the corrected coordinate value (x ′, y ′) is obtained by the following equation (21).

(x ′, y ′) = (x-ofst_Wx, y-ofst_Wy) (21)
By performing the correction process as described above, it is possible to eliminate a sudden change in the correction amount.

  By the way, when the correction is performed using the four reference points P, Q, R, and S, the figure connecting the four reference points P, Q, R, and S is a square when the angle of the finger 900 is considered. It is preferable to set the reference points P, Q, R, and S so that However, when the reference points P, Q, R, and S are set as the center points in each region, the figure connecting the four reference points P, Q, R, and S may be a rectangle. In this case, using linear approximation, the correction amount is recalculated so that the figure connecting the four reference points P, Q, R, and S becomes a square, and the recalculated correction amount is used to calculate the correction amount. Correction may be performed.

<Others>
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Mobile phone, 1A housing | casing, 1B housing | casing, 1C 2 axis | shaft hinge, 10 control part, 10A control part, 11 detection part, 12 conversion part, 13 1st calculation part, 14 2nd calculation part, 15 judgment part, 16 Correction unit, 17 Display control unit, 18 division unit, 105 microphone, 107 operation keys, 108 touch panel display, 108A touch panel display, 109 earphone, 183 liquid crystal panel, 184 A / D converter, 185 touch panel, 186 acceleration sensor, 811 icon, 812 target point, 812a target point, 812b target point, 812c target point, 812d target point, P1 reference point, P reference point, Q reference point, R reference point, S reference point.

Claims (10)

A touch panel display comprising a display device and a touch panel attached to a display surface of the display device,
Detecting means for detecting a signal corresponding to a touch position based on receiving a touch input to the touch panel;
Conversion means for converting the detected signal into coordinate values in a predetermined coordinate system with respect to the display surface;
Display control means for displaying a reference point on the display surface;
Based on receiving the touch input targeting the reference point in a state where the reference point is displayed, the conversion unit converts the coordinate value of the reference point and the signal detected by the touch input. First calculating means for calculating a difference from the coordinate value obtained by
A state in which the touch panel display is rotated from the first state by 90 degrees about the perpendicular to the display surface as a second state, and the touch panel display is rotated from the second state by 90 degrees in the rotation direction. In the third state, and when the touch panel display is further rotated 90 degrees from the third state in the rotation direction, the fourth state,
The first calculation means performs a first input that is the difference when the touch input targeting the reference point in the first state is received, and a touch input that targets the reference point in the second state. Calculating the second difference, which is the difference when accepted,
The touch panel display is
Based on the first difference and the second difference, the third difference, which is the difference when it is assumed that a touch input targeting the reference point in the third state has been received, and the reference in the fourth state Second calculation means for calculating a fourth difference, which is the difference when it is assumed that touch input targeting a point is received;
A touch panel display further comprising correction means for correcting the coordinate value after the conversion using any one of the first difference, the second difference, the third difference, and the fourth difference. The touch panel display is
An acceleration sensor;
In which of the first state, the second state, the third state, and the fourth state the touch input after the third difference and the fourth difference are calculated, Determination means for determining based on the detection result of the acceleration sensor,
When it is determined that the touch input is performed in the first state, the correction unit corrects the coordinate value after the conversion using the first difference, and the touch input is performed in the second state. When it is determined that the coordinate value after the conversion is corrected using the second difference, the third difference is determined when it is determined that the touch input is performed in the third state. And correcting the converted coordinate value using the fourth difference when it is determined that the touch input is performed in the fourth state. Item 10. A touch panel display according to Item 1. The second calculation means includes
Based on the first difference and the second difference, a shift amount of the touch position on the touch panel with respect to the reference point, and a shift amount from the reference point generated when the touch panel is attached to the display surface To calculate
The touch panel display according to claim 1, wherein the third difference and the fourth difference are calculated based on the two calculated shift amounts.   The touch panel display according to claim 1, wherein the display control unit displays the reference point at the center of the display surface. The touch panel display further includes a dividing unit that virtually divides the display surface into a plurality of regions,
The display control means displays the reference point in each area,
The first calculation means calculates the first difference and the second difference in each region,
The second calculation means calculates the third difference and the fourth difference in each region based on the first difference and the second difference calculated in each region,
The correction means performs the correction using any one of the first difference, the second difference, the third difference, and the fourth difference calculated in a region where touch input is performed. The touch panel display according to claim 1, wherein the touch panel display is performed.   The touch panel display according to claim 5, wherein the dividing unit virtually divides the display surface into a plurality of regions in a matrix.   The touch panel display according to claim 5 or 6, wherein the display control means displays the reference point at the center of each region.   An electronic device comprising the touch panel display according to claim 1. A correction method in a touch panel display comprising a display device and a touch panel attached to a display surface of the display device,
Detecting a signal corresponding to a touch position based on receiving a touch input to the touch panel;
Converting the detected signal into a coordinate value in a predetermined coordinate system with respect to the display surface;
Displaying a reference point on the display surface;
Based on receiving the touch input targeting the reference point in a state where the reference point is displayed, the conversion unit converts the coordinate value of the reference point and the signal detected by the touch input. Calculating a difference from the coordinate value obtained by
A state in which the touch panel display is rotated from the first state by 90 degrees about the perpendicular to the display surface as a second state, and the touch panel display is rotated from the second state by 90 degrees in the rotation direction. In the third state, and when the touch panel display is further rotated 90 degrees from the third state in the rotation direction, the fourth state,
The step of calculating the difference includes a first difference that is the difference when the touch input targeting the reference point in the first state is received, and a touch input that targets the reference point in the second state. And calculating a second difference that is the difference when receiving
The correction method is:
Based on the first difference and the second difference, the third difference, which is the difference when it is assumed that a touch input targeting the reference point in the third state has been received, and the reference in the fourth state Calculating a fourth difference that is the difference when it is assumed that a touch input targeting a point is received;
And a step of correcting the converted coordinate value using any one of the first difference, the second difference, the third difference, and the fourth difference. A program for executing a correction method in a touch panel display including a display device and a touch panel attached to a display surface of the display device,
The correction method is:
Detecting a signal corresponding to a touch position based on receiving a touch input to the touch panel;
Converting the detected signal into a coordinate value in a predetermined coordinate system with respect to the display surface;
Displaying a reference point on the display surface;
Based on receiving the touch input targeting the reference point in a state where the reference point is displayed, the conversion unit converts the coordinate value of the reference point and the signal detected by the touch input. Calculating a difference from the coordinate value obtained by
A state in which the touch panel display is rotated from the first state by 90 degrees about the perpendicular of the display surface as a second state, and the touch panel display is rotated from the second state by 90 degrees in the rotation direction. Is the third state, and when the touch panel display is further rotated 90 degrees in the rotation direction from the third state to the fourth state,
The step of calculating the difference includes a first difference that is the difference when a touch input targeting the reference point in the first state is received, and a touch input that targets the reference point in the second state. Calculating a second difference that is the difference in the case of receiving
The correction method is:
Based on the first difference and the second difference, the third difference, which is the difference when it is assumed that a touch input targeting the reference point in the third state has been received, and the reference in the fourth state Calculating a fourth difference that is the difference when it is assumed that a touch input targeting a point is received;
And a step of correcting the coordinate value after the conversion using any one of the first difference, the second difference, the third difference, and the fourth difference.

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