JP2014021954A - Touch panel input device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately detect a touch position in the end of a display screen even when there is difference in level between the display screen and a frame surrounding the display screen in a touch panel input device.SOLUTION: When contact surface-edge distances (dx, dy) from the contact surface (Ts) of a user's finger touching on a touch panel 15t in the X direction to the end and in the Y direction to the end on the latest display screen are longer than the distances (rx, ry) from the center position (Cx, Cy) in the finger contact surface (Ts) to the ends of the contact surface in the X direction and in the Y direction, the center position (Cx, Cy) in the finger contact surface (Ts) are determined to be a touch position (X, Y) designated by the user. On the other hand, when the contact surface-edge distances (dx, dy) from the finger contact surface (Ts) are shorter than the distances (rx, ry) to the ends of the finger contact surface (Ts), a position (2dx, 2dy) extended twice the contact surface-edge distances (dx, dy) are determined to be a touch position (X, Y) designated by the user.

Description

  The present invention relates to a touch panel input device provided in various information terminal devices such as a personal computer and a control program thereof.

  In recent years, in information terminal devices such as handheld personal computers, electronic dictionary devices, and mobile phones, the display screen functions as a touch panel, and the user touches the displayed content with a finger. To perform a desired input process.

  In general, the touch position (XY coordinates) detected as the user-designated position when the touch panel is touched is the center point of the contact area with the touched finger.

  A coordinate input device having an electrostatic capacitance type touch position detection function is considered (for example, see Patent Document 1).

JP 2010-250522 A

  In an electronic device having a display unit with a touch panel, if there is a step between the display screen and a frame surrounding the display screen due to the structure of the device, even if the user intends to touch the corner of the display screen, the touch position May not be detected well.

  The present invention has been made in view of such a problem, and even when there is a step between a display screen and a frame surrounding the display screen, it is possible to appropriately execute touch designation for a corner of the display screen. An object of the present invention is to provide a touch panel input device and a control program for the touch panel input device.

  The touch panel input device according to the present invention includes a touch panel, a touch part detection unit that detects a part touched by the touch panel, and the center of the contact part detected by the touch part detection unit that is closest to the edge of the touch panel. Input position determination for determining an input position of the touch panel based on a first distance to the outer edge of the touch part and a second distance from the outer edge of the touch part closest to the edge of the touch panel to the edge of the touch panel Means.

  A program according to the present invention is a program for controlling a computer of an electronic device provided with a touch panel, and the computer detects a portion where the touch panel is touched by the touch portion detection means, and the touch portion detection means. A first distance from the center of the detected contact portion to the outer edge of the contact portion closest to the edge of the touch panel, and a second distance from the outer edge of the contact portion closest to the edge of the touch panel to the edge of the touch panel Based on the above, it is characterized by functioning as an input position determining means for determining the input position of the touch panel.

  According to the present invention, even when there is a step between the display screen and the frame surrounding the display screen, even when it is difficult to specify a touch near the edge of the screen, the touch specification for the corner of the display screen is performed. Can be properly executed.

The perspective view which shows the external appearance structure of the portable information terminal device 10 carrying the touchscreen input device which concerns on embodiment of this invention. FIG. 3 is a block diagram showing a configuration of an electronic circuit of the portable information terminal device 10. 6 is a flowchart showing touch position detection processing of the portable information terminal device 10. Touch surface center position (Cx, Cy) and touch when the contact surface-to-edge distance (dx, dy) is longer than the contact surface edge distance (rx, ry) in accordance with the touch position detection processing of the portable information terminal device 10. The figure which shows the relationship with a position (X, Y). With the touch position detection process of the portable information terminal device 10, the contact surface center position (Cx, Cy) when the contact surface-edge distance (dx, dy) is equal to or shorter than the contact surface edge distance (rx, ry). ) And the touch position (X, Y). FIG. 9A shows a case where the contact surface-edge distances (dx, dy) are equal, and FIG. -The figure which shows the case where the distance (dx, dy) between edges is short. The flowchart which shows the touch position determination process of other embodiment of the said portable information terminal device. The storage state of the touch position (X, Y) in the touch position memory 26e and the storage state of the contact area S in the contact surface memory 26a according to the touch position determination process of another embodiment of the portable information terminal device 10 are shown. Figure. The side view which shows the process in which the user's fingertip H is touched with respect to the touch panel 15t in the display part 15 with a touch panel of the said portable information terminal device 10, and the contact area S expands. The contact surface center position (Cx, Cy), the contact surface edge distance (rx, ry), and the contact surface-edge distance (dx) when the touch contact surface Ts on the touch panel 15t of the portable information terminal device 10 is a distorted circle. , Dy).

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing an external configuration of a portable information terminal device 10 equipped with a touch panel input device according to an embodiment of the present invention.

  The portable information terminal device 10 is configured as a touch panel PC (handheld personal computer) described below, or configured as an electronic dictionary, a mobile phone, an electronic book, a portable game machine, or the like.

  The portable information terminal device 10 includes a foldable case in which a main body case 11 and a lid case 12 can be expanded / closed via a hinge portion 13. A key input unit 14 including character / symbol input keys and the like is provided on the surface of the main body case 11 in which the folding case is developed.

  Further, on the surface of the lid case 12, a display unit 15 with a touch panel fitted to the display unit frame 15F is provided for almost the entire surface.

  This display unit 15 with a touch panel has a structure in which a touch position detection device that detects a position touched by a user with a finger or the like and a display device are integrated, and a transparent touch panel 15t is superimposed on a color liquid crystal display screen 15d with a backlight. Composed. In the present embodiment, the transparent touch panel 15t is an electrostatic capacitance type, and a plurality of rows of first light transmissive electrode patterns extending in the X direction and a plurality of rows of second light transmissive properties extending in the Y direction. It is assumed that the electrode pattern is formed so as to intersect with the electrode pattern, and the position where the finger is in contact is known.

  Here, since the display unit frame 15F is higher than the height of the display screen of the display unit 15 of the present embodiment, there is a step at the edge of the display screen.

  And this portable information terminal device 10 detects the touch position accompanying the touch operation in the normal screen area of the display unit 15 with the touch panel with high accuracy, and in the vicinity of the corner of the display screen close to the display unit frame 15F. Even when a touch operation is detected, a touch position detecting function for appropriately detecting a touch position intended by the user is provided.

  FIG. 2 is a block diagram showing a configuration of an electronic circuit of the portable information terminal device 10.

  The portable information terminal device 10 is configured by a computer that reads a program recorded on various recording media and whose operation is controlled by the read program. A CPU (central processing unit) 21 is included in the electronic circuit. Provided.

  The CPU 21 is a device control program stored in advance in the storage device 22 or a device control program read from the external recording medium 23 such as a ROM card into the storage device 22 via the recording medium reading unit 24 or on the Internet N. The operation of each part of the circuit is controlled by using the RAM 26 as a working memory in accordance with a device control program read into the storage device 22 from the Web server (in this case, the program server) 30 via the communication unit 25.

  The device control program stored in the storage device 22 is an input signal corresponding to a user operation from the key input unit 14 or the display unit 15 with a touch panel, or each Web server on the Internet N connected via the communication unit 25. It is activated in response to a communication signal with 30.

  In this way, the storage device 22, the recording medium reading unit 24, the communication unit 25, the RAM 26, the key input unit 14, and the display unit 15 with a touch panel are connected to the CPU 21.

  In the storage device 22, as a device control program, a system program that controls the overall operation of the portable information terminal device 10, each Web server 30 on the Internet N via the communication unit 25, and other terminals (not shown) A communication program or the like for data communication with an apparatus or the like is stored. Further, as the device control program, a touch position detection program 22a for appropriately detecting touch positions in all display screen areas in the display unit 15 with a touch panel is stored.

  The RAM 26 includes a contact surface (Ts) memory 26a, a contact surface center position (Cx, Cy) memory 26b, a contact surface end distance (rx, ry) memory 26c, and a contact surface-edge distance (dx, dy) memory 26d. The touch position (X, Y) memory 26e is secured.

  In the contact surface (Ts) memory 26a, when a touch operation on the display unit 15 with a touch panel is detected, finger contact surface data (all coordinate data in which contact is detected by the touch panel 15t: FIG. 4). Reference) Ts or contact area S is calculated and stored.

  The center (center of gravity) position (Cx, Cy) of the contact surface data Ts (or contact area S) is calculated and stored in the contact surface center position (Cx, Cy) memory 26b.

  In the contact surface end distance (rx, ry) memory 26c, the edge (display unit frame 15F) of the display screen from the center (center of gravity) position (Cx, Cy) in the contact surface data Ts is closer to the X direction. The distance rx to the end and the distance ry to the end in the Y direction are calculated and stored. Hereinafter, rx and ry are referred to as contact surface end distances.

  In the contact surface-to-edge distance (dx, dy) memory 26d, the contact surface-to-edge distance dx in the X direction and the contact surface-to-edge distance in the Y direction closer to the edge of the display screen in the contact surface data Ts. dy is calculated and stored.

  The touch position (X, Y) memory 26e is based on the contact surface center position (Cx, Cy), the contact surface end distance (rx, ry), and the contact surface-edge distance (dx, dy). The touch position (X, Y) determined and calculated as the user-specified designated position is stored.

  In the portable information terminal device 10 configured as described above, the CPU 21 controls the operation of each part of the circuit according to instructions described in the device control program (including the touch position detection program 22a), and the software and hardware cooperate. By operating as described above, the touch position detection function described in the following operation description is realized.

  Next, the operation of the portable information terminal device 10 equipped with the touch panel input device having the above configuration will be described.

  FIG. 3 is a flowchart showing a touch position detection process of the portable information terminal device 10.

  FIG. 4 shows the contact surface center position (Cx, dy) when the contact surface-edge distance (dx, dy) is longer than the contact surface edge distance (rx, ry) due to the touch position detection processing of the portable information terminal device 10. It is a figure which shows the relationship between Cy) and touch position (X, Y).

  FIG. 5 illustrates the contact surface center position (Cx, Cy) when the contact surface-edge distance (dx) is equal to or shorter than the contact surface end distance (rx) in accordance with the touch position detection processing of the portable information terminal device 10. ) And the touch position (X, Y). FIG. 11A shows a case where the contact surface-edge distance (dx) is the same, and FIG. It is a figure which shows the case where a distance (dx) is short.

  If it is determined that the touch panel 15t is touched in response to a user operation based on an output signal from the touch panel 15t in the display unit 15 with a touch panel (step S1 (Yes)), for example, FIG. 4 or FIG. ), The contact surface data Ts with the touched user's finger is specified and stored in the contact surface memory 26a (step S2).

  Then, the center position (Cx, Cy) is calculated based on the contact surface data Ts and stored in the contact surface center position memory 26b (step S3). This center position is determined by calculating the center of gravity of the shape determined by all coordinates stored as the contact surface data Ts.

  Also, the edge of the display screen closer to the X direction (“right” or “left”) and the edge of the display screen closer to the Y direction (“up” or “lower”) from the contact surface (Ts) of the finger. Is identified (step S4). In the specific examples shown in FIGS. 4 and 5A and 5B, the X direction is specified as “right” and the Y direction is specified as “up”.

  Then, the contact surface end distance rx in the X direction and the contact surface end distance ry in the Y direction from the center position (Cx, Cy) on the contact surface (Ts) to the specified screen edge direction are calculated, and the contact surface It is stored in the end distance memory 26c (step S5).

  Further, the X-direction contact surface-edge distance dx and the Y-direction contact surface-edge distance dy from the end of the contact surface (Ts) to the specified screen edge direction are calculated, and the contact surface- It is stored in the edge distance memory 26d (step S6).

  Here, first, the contact surface end distance rx in the X direction and the contact surface-edge distance dx are compared and determined (steps S7 and S9), and as shown in FIG. 4 or FIG. When it is determined that the edge distance dx is longer than the contact surface edge distance rx (step S7 (Yes)), the center position Cx of the contact surface (Ts) is determined as the touch position X in the X direction. It is stored in the touch position memory 26e (step S8).

  On the other hand, as shown in FIG. 5B, when it is determined that the contact surface-to-edge distance dx is shorter than the contact surface end distance rx (step S9 (Yes)), the X direction is changed from the edge to the contact. A position 2dx obtained by doubling the surface-to-edge distance dx is determined as the touch position X and stored in the touch position memory 26e (step S10).

  Similarly, with respect to the contact surface end distance ry and the contact surface-edge distance dy in the Y direction, as shown in FIG. 4 or FIG. If it is determined that the distance ry is greater than or equal to the distance ry (step S11 (Yes)), in the Y direction, the center position Cy of the contact surface (Ts) is determined as the touch position Y and stored in the touch position memory 26e (step S11). S12).

  On the other hand, when it is determined that the contact surface-edge distance dy is shorter than the contact surface end distance ry (step S13 (Yes)), the Y direction doubles the contact surface-edge distance dy from the edge. The extended 2dy position is determined as the touch position Y and stored in the touch position memory 26e (step S14).

  As a result, the touch position (X, Y) stored in the touch position memory 26e is processed as the position designated by the user (step S15).

  Here, based on the presence or absence of an output signal from the touch panel 15t, it is determined whether or not the touch operation on the touch panel 15t has been released (step S16). If it is determined that the touch operation is still continuing (step S16). (No)), the process returns to step S2 again and is updated to the touch position (X, Y) according to the user operation (steps S2 to S15).

  Therefore, according to the touch position detection function of the portable information terminal device 10 equipped with the touch panel input device having the above-described configuration, the closest X direction and Y direction from the contact surface (Ts) of the user's finger touched on the touch panel 15t. The contact surface-to-edge distance (dx, dy) to the display screen edge is the distance from the center position (Cx, Cy) of the finger contact surface (Ts) to the end of the contact surface in the X direction and the Y direction ( If the length is equal to or longer than (rx, ry), the center position (Cx, Cy) of the contact surface (Ts) of the finger is determined as the touch position (X, Y) specified by the user. Further, when the contact surface-edge distance (dx, dy) from the contact surface (Ts) of the finger is shorter than the distance (rx, ry) to the end of the contact surface of the contact surface (Ts) of the finger The position where the distance (dx, dy) between the contact surface and the edge is doubled from the edge is determined as the touch position (X, Y) designated by the user.

  Accordingly, when the finger touching the touch panel 15t is away from the screen edge at the boundary with the display unit frame 15F, the center position (Cx, Cy) of the contact surface (Ts) of the finger is set to the touch position (X, Y) As a matter of course, user input processing can be performed, and for example, when it is desired to specify a position very close to the screen edge by touch, the screen is more than the center position (Cx, Cy) of the contact surface (Ts) of the finger. Since the position closer to the edge is determined as the touch position (X, Y), it is possible to perform an appropriate touch input process in accordance with the user's intention.

  Therefore, there is a step between the display screen and the frame surrounding the display screen, and even when it is difficult to specify the touch near the screen edge, it is possible to appropriately detect the touch position with respect to the corner of the display screen.

  In the embodiment, when the contact surface-edge distance (dx, dy) is shorter than the finger contact surface end distance (rx, ry), the contact surface-edge distance (dx, dy) from the edge. The position where X is doubled is determined as the touch position (X, Y), but the contact surface-edge distance (dx, dy) is multiplied by a fixed ratio R, and the position of Rdx, Rdy, A position where the ratio R is changed according to the contact surface-edge distance (dx, dy) may be determined as the touch position (X, Y).

  Further, when it is determined that the distance (dx, dy) between the contact surface and the edge is shorter than the predetermined value D and a part of the user's finger is clearly placed on the display unit frame 15F having a step, A position between the contact surface and the edge outside the contact surface (Ts) of the finger may be determined as the touch position (X, Y).

  Further, in the touch position detection process (see FIG. 3) of the embodiment, while the user's touch operation is continued on the touch panel 15t, various determination elements are repeatedly calculated and the touch position (X, Y) is determined. Although it is configured to update and determine, when the touch area S of the finger with respect to the touch panel 15t becomes the maximum, as described in the touch position determination processing (see FIGS. 6 to 8) of another embodiment below. The detected touch position (X, Y) may be determined as a user designated position.

(Other embodiments)
FIG. 6 is a flowchart showing a touch position determination process according to another embodiment of the portable information terminal device 10.

  FIG. 7 shows the storage state of the touch position (X, Y) in the touch position memory 26e and the contact area S in the contact surface memory 26a according to the touch position determination process of another embodiment of the portable information terminal device 10. It is a figure which shows a preservation | save state.

  FIG. 8 is a side view showing a process in which a user's fingertip H is touched on the touch panel 15t of the display unit 15 with a touch panel of the portable information terminal device 10 and the contact area S increases.

  In the specific example shown in FIG. 8, the X direction of the display screen edge (display unit frame 15F) closest to the contact surface of the fingertip H is “right” as in the specific examples shown in FIGS. “, Y direction is specified as“ up ”.

  In the touch position determination process of this embodiment, every time a touch position (X, Y) corresponding to a user operation is detected according to the touch position detection process in FIG. 3 (steps S1 to S15), the detected touch position ( Xn, Yn) and the finger contact area Sn at that time are accumulated and stored in the touch position memory 26e and the contact surface memory 26a at least twice including the latest data, as shown in FIG. (Step A1).

  Each time the new touch position (Xn, Yn) and the finger contact area Sn at that time are stored in the touch position memory 26e and the contact surface memory 26a, the finger contact area Sn is calculated last time. It is determined whether or not the contact area Sn-1 is increased (spread) (step A2).

  Here, when it is determined that the finger contact area Sn stored this time is larger than the previously calculated contact area Sn-1 (step A2 (Yes)), the touch panel 15t further displays the user's contact area Sn-1. It is determined whether or not the next data corresponding to the touch operation is being output (step A3).

  If it is determined that the next data corresponding to the user's continued touch operation is output (step A3 (Yes)), the next data is detected according to the touch position detection process (steps S1 to S15). The touch position (Xn, Yn) and the contact area Sn are newly stored (step A1), and it is determined whether or not the contact area Sn has further increased (step A2).

  Thereafter, for example, as shown in FIGS. 8A to 8D, in the process of gradually increasing the contact area S of the user's fingertip H with respect to the touch panel 15t (steps A1 to A3 → S1 to S15 → A1), When it is determined that the fingertip H is quickly released and the next data is not output (step A3 (No)), the latest (most recent) touch position (Xn, Yn) stored in the touch position memory 26e is obtained. It is output as the user's designated position (X, Y) (step A4).

  On the other hand, when it is determined in step A2 that the finger contact area Sn detected and stored this time is not larger than the previously calculated contact area Sn-1, that is, the fingertip H is operated in a direction away from the touch panel 15t. (Step A2 (No)), the touch position (Xn-1, Yn-1) previously detected and stored in the touch position memory 26e is output as the user-specified position (X, Y) (Step S2). A5).

  Therefore, according to the touch position determination function of the other embodiment in the portable information terminal device 10 equipped with the touch panel input device having the above configuration, the touch position when the contact area S with the fingertip H with respect to the touch panel 15t is maximized. The touch position (X, Y) detected according to the detection process (steps S1 to S15) is determined as the user-specified position.

  Accordingly, as in the above-described embodiment, even when there is a step between the display screen and the frame surrounding the display screen, not only can the touch position with respect to the corner of the display screen be detected appropriately, but particularly the display When a part of the screen is specified by touching, the user-specified position (X, Y) can be obtained with high accuracy.

  Note that the contact surface Ts of the finger with respect to the touch panel 15t described with reference to FIG. 4 and FIG. 5 has been described by illustrating the shape of the contact surface Ts with a circle, but actually, as shown in FIG. It will not be circular.

  Therefore, a description of the contact surface end distances rx, ry will be added using FIG.

  That is, when a non-circular contact surface as shown in FIG. 9 is obtained, the center of gravity of the contact surface Ts is obtained as the center position (Cx, Cy), and the screen edge (display unit) is displayed from the center position (Cx, Cy). The distance to the tangent TLy extending in the Y direction at the end of the contact surface closer to the frame 15F) is the contact surface end distance rx, from the center position (Cx, Cy) to the X direction of the contact surface end closer to the screen edge. A distance to the extending tangent line TLx is defined as a contact surface end distance ry. Further, the distance from the tangent (TLy, TLx) at the end of the contact surface to the screen edge (display unit frame 15F) may be calculated as the contact surface-edge distance (dx, dy).

  Thereby, similarly to the above-described embodiment, even when there is a step between the display screen and the frame surrounding the display screen, it is possible to appropriately detect the touch position with respect to the corner of the display screen.

  Each processing method by the portable information terminal device 10 equipped with the touch panel input device described in each of the above embodiments, that is, touch position detection processing shown in the flowchart of FIG. 3, and touch positions of other embodiments shown in the flowchart of FIG. Each method such as decision processing is a program that can be executed by a computer, such as a memory card (ROM card, RAM card, etc.), a magnetic disk (floppy disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.). ), And can be stored and distributed in an external recording medium 23 such as a semiconductor memory. Then, the computer of the electronic device having the display unit with a touch panel (15) reads the program recorded in the external recording medium 23 into the storage device 22, and the operation is controlled by the read program. The touch position detection function described in the embodiment can be realized, and the same processing by the above-described method can be executed.

  Further, program data for realizing each of the above methods can be transmitted on the network N in the form of a program code, and this program data can be transmitted to a computer of an electronic apparatus having a display unit (15) with a touch panel. By capturing by the communication unit 25, the touch position detection function described above can also be realized.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. Further, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in each embodiment or some constituent elements are combined in different forms, the problems described in the column of the problem to be solved by the invention If the effects described in the column “Effects of the Invention” can be obtained, a configuration in which these constituent requirements are deleted or combined can be extracted as an invention.

  Hereinafter, the invention described in the scope of claims of the present application will be appended.

[1]
A touch panel;
Touch part detecting means for detecting a part touched by the touch panel;
A first distance from the center of the contact part detected by the touch part detection means to the outer edge of the contact part closest to the edge of the touch panel, and an edge of the touch panel from the outer edge of the contact part closest to the edge of the touch panel Input position determining means for determining an input position of the touch panel based on the second distance to
A touch panel input device comprising:

[2]
The input position determining means includes
The first distance is compared with the second distance, and when the second distance is longer than the first distance, the center of the touched portion is determined as the input position of the touch panel.
The touch panel input device according to [1], wherein

[3]
The input position determining means includes
When the second distance is shorter than the first distance, the input position of the touch panel is a position that is a distance obtained by multiplying the second distance by a predetermined magnification from the edge of the touch panel toward the center of the touched portion. As determined,
The touch panel input device according to [2], wherein

[4]
The input position determining means includes
When it is determined that the second distance is shorter than the first distance and less than a predetermined value, a position from the outer edge of the touched portion to the edge of the touch panel is determined as an input position of the touch panel. ,
The touch panel input device according to [3], wherein

[5]
An area acquisition means for repeatedly acquiring the area of the contact portion detected by the touch part detection means from the start of detection;
The input position determination unit is configured to input the touch panel based on the first distance and the second distance when the area of the touched portion acquired by the area acquisition unit becomes maximum. Determine the position,
The touch panel input device according to any one of [1] to [4], wherein:

[6]
A program for controlling a computer of an electronic device equipped with a touch panel,
The computer,
Touch part detecting means for detecting a part touched by the touch panel;
A first distance from the center of the contact part detected by the touch part detection means to the outer edge of the contact part closest to the edge of the touch panel, and an edge of the touch panel from the outer edge of the contact part closest to the edge of the touch panel The program for functioning as an input position determination means which determines the input position of the said touch panel based on the 2nd distance to.

DESCRIPTION OF SYMBOLS 10 ... Portable information terminal device 11 ... Main body case 12 ... Cover body case 13 ... Hinge part 14 ... Key input part 15 ... Display part with a touch panel 15d ... Color liquid crystal display part (with backlight)
15t ... Transparent touch panel 15F ... Display unit frame 21 ... CPU
DESCRIPTION OF SYMBOLS 22 ... Storage device 22a ... Touch position detection program 23 ... External recording medium 24 ... Recording medium reading part 25 ... Communication part 26 ... RAM
26a ... Contact surface (Ts) memory 26b ... Contact surface center position (Cx, Cy) memory 26c ... Contact surface edge distance (rx, ry) memory 26d ... Contact surface-edge distance (dx, dy) memory 26e ... Touch position (X, Y) Memory 30 ... Web server N ... Communication network H ... Fingertip

Claims (6)

A touch panel;
Touch part detecting means for detecting a part touched by the touch panel;
A first distance from the center of the contact part detected by the touch part detection means to the outer edge of the contact part closest to the edge of the touch panel, and an edge of the touch panel from the outer edge of the contact part closest to the edge of the touch panel Input position determining means for determining an input position of the touch panel based on the second distance to
A touch panel input device comprising: The input position determining means includes
The first distance is compared with the second distance, and when the second distance is longer than the first distance, the center of the touched portion is determined as the input position of the touch panel.
The touch panel input device according to claim 1. The input position determining means includes
When the second distance is shorter than the first distance, the input position of the touch panel is a position that is a distance obtained by multiplying the second distance by a predetermined magnification from the edge of the touch panel toward the center of the touched portion. As determined,
The touch panel input device according to claim 2. The input position determining means includes
When it is determined that the second distance is shorter than the first distance and less than a predetermined value, a position from the outer edge of the touched portion to the edge of the touch panel is determined as an input position of the touch panel. ,
The touch panel input device according to claim 3. An area acquisition means for repeatedly acquiring the area of the contact portion detected by the touch part detection means from the start of detection;
The input position determination unit is configured to input the touch panel based on the first distance and the second distance when the area of the touched portion acquired by the area acquisition unit becomes maximum. Determine the position,
The touch panel input device according to claim 1, wherein the touch panel input device is a touch panel input device. A program for controlling a computer of an electronic device equipped with a touch panel,
The computer,
Touch part detecting means for detecting a part touched by the touch panel;
A first distance from the center of the contact part detected by the touch part detection means to the outer edge of the contact part closest to the edge of the touch panel, and an edge of the touch panel from the outer edge of the contact part closest to the edge of the touch panel The program for functioning as an input position determination means which determines the input position of the said touch panel based on the 2nd distance to.

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