JP2015026394A - Electronic apparatus and method of coordinate detection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of satisfactorily preventing user's unintended operation in a hover operation allowing a user to perform an operation at a position separated away from a touch panel.SOLUTION: The electronic apparatus includes: a plane display part 3; two-dimensional coordinates (x, y) which are disposed being overlapped with the display part 3 along a plane of the display part 3 of a finger 10 as an instruction member; and a touch panel 2 capable of detecting a vertical distance (z) between the finger 10 and the touch panel 2. An effective area 50 where the two-dimensional coordinates (x, y) are effective gets narrower as the vertical distance (z) between the finger 10 and the touch panel 2 gets larger. With this arrangement, user's unintended operation in a hover operation is satisfactorily prevented in a hover operation allowing a user to perform an operation at a position separated away from a touch panel 2.

Description

  The present invention relates to an electronic device equipped with a touch panel and a coordinate detection method usable in the electronic device.

As is well known, a touch panel is a combination of a display device such as a liquid crystal panel and a touch pad (position input device).
Some touch panels have a capacitance type capable of performing an operation within a predetermined range of height without touching the panel surface (hereinafter, this proximity operation is referred to as “hover operation”). FIG. 10 is a diagram illustrating a schematic configuration of a capacitive touch panel. In the figure, a transmitting electrode 101 and a receiving electrode 102 are disposed on the lower surface of a plate-like dielectric 100, and a driving pulse is applied to the transmitting electrode 101 from a driving buffer 103. When a drive pulse is applied, an electric field is generated. If a hand is placed in the electric field, the number of lines of electric force between the transmission electrode 101 and the reception electrode 102 decreases. This change in the electric lines of force appears as a change in charge at the receiving electrode 102. The approach of the hand to the touch panel is detected from the change in charge at the receiving electrode 102.

  FIG. 11 is a diagram illustrating a finger detection state when a hand is gradually brought closer to the touch panel. In the figure, (a) is the state when the hand is away from the electric field, (b) is the finger hover detection state when the finger is in the electric field, and (c) is the finger fully entering the electric field. This is a finger touch detection state touching the touch panel.

By the way, when a finger touches the touch panel for an operation purpose, it is not an erroneous operation.For example, when operating with one hand, a part other than the fingertip such as the base of the thumb may be detected before detecting the thumb coordinate, The operation intended by the user may be hindered.
As a method for preventing an operation not intended by the user, for example, there is an input control method described in Patent Document 1. This input control method detects a touch on the touch panel, specifies an area including at least the touched area as an invalid area that does not accept an input operation, detects a touch on the touch panel, and the touched area is an invalid area. If it is not included, the input process associated with the area is executed.

JP 2012-234386 A

  However, if an invalid area that does not accept input operations is fixed, in the case of a hover operation that allows operation at a position away from the touch panel, for example, the apparent size of the finger viewed from the touch panel is displayed. Since this differs depending on the difference in vertical distance between the surface of the part and the finger, there is a problem that an operation unintended by the user cannot be sufficiently prevented.

  The present invention has been made in view of such circumstances, and provides an electronic device that can sufficiently prevent an operation unintended by a user in a hover operation that enables an operation at a position away from the touch panel. Objective.

  The electronic device according to the present invention is arranged so as to overlap the planar display unit and the display unit, and can detect a two-dimensional coordinate along a plane of the display unit of the indicator and a vertical distance between the indicator. A detection area that is capable of detecting the two-dimensional coordinates and the vertical distance at least with respect to the vertical distance that is less than or equal to the first value and greater than a second value that is smaller than the first value. And a non-detection region that is larger than the first value for at least the vertical distance and cannot detect the two-dimensional coordinates and / or the vertical distance, and the detection region has the first value for the vertical distance. The first value from the value 1 to the second value, the first region including the center of the touch panel with respect to the two-dimensional coordinates, and the vertical distance from the first value to at least a part of the second value, Above A second region outside the first region with respect to a dimensional coordinate, and the first region at the vertical distance of a predetermined value between the first value and the second value is The electronic device has a predetermined value that becomes narrower as the value increases from the second value toward the first value, and the indicator moves from the non-detection region that is larger than the first value with respect to the vertical distance. When entering the first area directly, at least the two-dimensional coordinates of the indicator are regarded as effective coordinates, and then when entering the second area from the first area, at least the two-dimensional of the indicator If the coordinates are valid coordinates and the indicator enters the second area directly from the non-detection area, at least the two-dimensional coordinates of the indicator are invalid coordinates, and then from the second area When entering the first area, At least the two dimensional coordinates of a pointer to a valid coordinate, then when entering from the first region to the second region, the effective coordinates of at least the two dimensional coordinates of the pointer.

  According to the above configuration, the first region is narrowed as the vertical distance to the indicator (for example, “finger”) increases, and thus an operation unintended by the user in a hover operation that enables an operation at a position away from the touch panel. Can be prevented, and when entering the second region outside the first region after entering the first region, the second region can be operated.

  In the electronic apparatus according to the aspect of the invention, the first region becomes narrower in a state including at least the center of the display unit as the vertical distance increases.

  In the electronic device of the present invention, the first region becomes narrower toward the center of the display unit as the vertical distance increases.

  In the electronic device of the present invention, the first area is largest when the vertical distance is minimum.

  In the electronic device of the present invention, the first area is switched in at least two stages.

  In the electronic device of the present invention, the display unit and the first region are quadrangular, and the quadrangle of the first region is at least smaller than the quadrangle of the display unit when the vertical distance is larger than a predetermined value.

  In the electronic device according to the present invention, the quadrangular shape of the first region decreases as the vertical distance increases.

  In the electronic device according to the aspect of the invention, the quadrangle of the display unit and the first region is a rectangle, and the width of at least the long sides facing each other in the rectangle of the first region becomes narrower as the vertical distance increases.

  In the electronic device of the present invention, at least the long side of the first region moves toward the middle line drawn along the long side of the rectangle of the display unit as the vertical distance increases.

  In the electronic device of the present invention, the second value is zero.

  In the electronic device of the present invention, the effective two-dimensional coordinates can be displayed at least on the display unit.

The coordinate detection method of the present invention can detect a vertical distance between a planar display unit, two-dimensional coordinates of the indicator along the plane of the display unit, and the indicator. A touch panel, wherein the touch panel is capable of detecting the two-dimensional coordinates and the vertical distance at least with respect to the vertical distance and less than a first value and larger than a second value smaller than the first value. An area and a non-detection area that is larger than the first value for at least the vertical distance and incapable of detecting the two-dimensional coordinates and / or the vertical distance, the detection area for the vertical distance From the first value to the second value, the first region including the center of the touch panel with respect to the two-dimensional coordinates, and the vertical distance from the first value to at least part of the second value. , A second region outside the first region with respect to the two-dimensional coordinate, and the first region at the vertical distance of a predetermined value between the first value and the second value is the a predetermined value coordinate detection method available indicator in narrower electronic apparatus according to increase toward the first value from the second value, the indicator is, before Symbol undetected When entering the first area directly from an area, at least the two-dimensional coordinates of the indicator are effective coordinates, and then when entering the second area from the first area, at least the indicator of the indicator When two-dimensional coordinates are effective coordinates, and the indicator directly enters the second region from the non-detection region that is greater than the first value with respect to the vertical distance, at least the two-dimensional coordinates of the indicator are Invalid coordinates and then previous When entering the first area from the second area, at least the two-dimensional coordinates of the indicator are set as effective coordinates. Next, when entering the second area from the first area, at least the indicator The two-dimensional coordinates are set as effective coordinates.

  According to the above method, it is possible to prevent an unintended operation by the user in a hover operation that enables an operation at a position away from the touch panel, and after entering the first area, the second area outside the first area When entering, the operation can be performed also in the second area.

  ADVANTAGE OF THE INVENTION According to this invention, in the hover operation which enables operation in the position away from the touch panel, the operation which a user does not intend can be prevented.

The block diagram which shows schematic structure of the electronic device which concerns on one embodiment of this invention The perspective view which shows the external appearance of the electronic device of FIG. The figure which shows the positional relationship of the finger | toe which is a touch panel and the indicator in the electronic device of FIG. The figure which showed typically the invalid area and effective area in the touch panel of the electronic device of FIG. The top view which shows the invalid area | region and effective area | region in the touchscreen of the electronic device of FIG. The figure for demonstrating the example of a setting of the effective area in the touchscreen of the electronic device of FIG. The figure which showed typically the non-detection area | region and detection area | region in the touchscreen of the electronic device of FIG. The flowchart for demonstrating the valid / invalid determination process of the two-dimensional coordinate by the control part of the electronic device of FIG. The figure which is an application example of the setting of the effective area in the touch panel of the electronic device of FIG. 1, and shows an example which switches in two steps The figure which shows schematic structure of a capacitive touch panel The figure which shows the detection state of a finger when a hand is gradually brought close to a touch panel

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of an electronic apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view showing an external appearance of the electronic apparatus of FIG. The electronic device 1 according to the present embodiment is one in which the present invention is applied to, for example, a portable wireless device called a smartphone. In the block diagram of FIG. 1, a portion that functions as a wireless device is omitted.

  In FIG. 1, an electronic device 1 according to the present embodiment includes a touch panel 2, a display unit 3, a storage unit 5, and a control unit 6. As shown in FIG. 2, the electronic apparatus 1 according to the present embodiment has a vertically-long rectangular casing 7, and the touch panel 2 and the display unit 3 are arranged on the front side of the casing 7. The The touch panel 2 and the display unit 3 have a surface shape having an area slightly smaller than the area of the front surface of the housing 7 and are formed in a vertically long rectangular shape in plan view. In this case, the area of the display unit 3 is slightly smaller than the area of the touch panel 2. The touch panel 2 is disposed so as to overlap the front side of the display unit 3.

  The touch panel 2 is operated at a height within a predetermined range without touching an indicator (such as a user's finger or pen, which is treated as a “finger” in the present embodiment) on the panel surface. Capacitance method that enables “hover operation”). As shown in FIG. 10, the touch panel 2 that employs the electrostatic capacitance method includes a transmission electrode 101 and a reception electrode 102, which are spaced apart from the lower surface of the plate-like dielectric 100. A driving pulse based on a transmission signal is applied to the transmission electrode 101. When a drive pulse is applied to the transmission electrode 101, an electric field is generated from the transmission electrode 101. When a finger enters the electric field, the number of lines of electric force between the transmission electrode 101 and the reception electrode 102 decreases. The change in the number appears as a change in charge at the receiving electrode 102. The touch panel 2 detects a finger from a received signal corresponding to a change in charge at the receiving electrode 102, detects a two-dimensional coordinate (x, y) along the surface of the display unit 3 of the finger, and is a finger as an indicator. And the vertical distance (z) between the surface of the display unit 3 and the detected two-dimensional coordinates (x, y) and the vertical distance (z) are output to the control unit 6.

  The display unit 3 has a rectangular shape, and is used for display for operating the electronic device 1 and display of images and the like. For the display unit 3, a display device such as an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence), or an electronic paper is used. The storage unit 5 includes a volatile memory such as a DRAM (Dynamic Random Access Memory), and stores the settings when the user performs settings for using the electronic device 1.

  The control unit 6 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and an interface circuit. The ROM stores a program for controlling the CPU. Used in the operation of the CPU. The control unit 6 has a pointer mode and a normal mode as operation modes. The pointer mode is a mode used when performing a pad operation, and the normal mode is a mode in which the touch position and the functional operation position are the same.

  Similar to the operation in the normal mode, the operation in the pointer mode is an indirect operation (the above-described hover operation) in which the operation is performed over the touch panel 2 instead of directly touching the touch panel 2. By switching a finger within a predetermined distance range above a predetermined area of the touch panel 2, the mode is switched to the pointer mode. After switching to the pointer mode, the pointer (not shown) moves following the movement of the finger. In this pointer mode, a predetermined function is executed corresponding to the position of the pointer.

  FIG. 3 is a diagram illustrating a positional relationship between the touch panel 2 and the finger 10 that is an indicator. As shown in the figure, in the sky above the touch panel 2, the finger is within a distance range that is equal to or smaller than the first distance (first value) and larger than the second distance (second value) smaller than the first distance. Switch to pointer mode by tapping 10. By switching to the pointer mode, the coordinates (x, y, z) of the finger 10 in the hover state are detected. Then, it is displayed as a pointer 30 at a position on the surface of the display unit 3 corresponding to the coordinates (x, y, z) where the finger 10 is detected. At this time, if the pointer 30 overlaps with an icon (not shown), it is assumed that the icon can be selected, and the function corresponding to the icon is activated when the finger 10 approaches the touch panel 2 below the second distance. To do. The display of the pointer 30 and the activation of the function corresponding to the icon are performed by the control unit 6. The second distance may be 0 (zero). The pointer 30 may be displayed as a point as shown in FIG. 3, or may be displayed as a symbol such as an arrow.

  For example, the control unit 6 captures coordinates (x, y, z) output from the touch panel 2 in the pointer mode. Then, in accordance with the vertical distance (z) between the finger 10 and the touch panel 2, an effective area (two-dimensional coordinate effective area, first area) for validating the two-dimensional coordinates is set. In this case, the control unit 6 narrows the effective area as the vertical distance (z) between the finger 10 and the touch panel 2 increases. FIG. 4 is a diagram schematically showing an invalid area and an effective area (a part) on the touch panel 2. FIG. 5 is a plan view showing an invalid area and an effective area on the touch panel 2. In FIG. 4, the invalid area 40 is an area composed of an invalid X and Y area 40 </ b> A corresponding to the X and Y directions of the touch panel 2 and an invalid Z area 40 </ b> B corresponding to the Z direction of the touch panel 2. The invalid area 40 spreads inside the touch panel 2 as the vertical distance (z) between the finger 10 and the touch panel 2 increases, and the valid area 50 narrows against the spread of the invalid area (second area) 40. . In this case, since the invalid area 40 extends inside the touch panel 2, the valid area 50 has a trapezoidal shape. Actually, it becomes a three-dimensional trapezoid (see FIG. 7 described later). The planar shape of the effective area 50 is a quadrangle like the display unit 3. In this case, as a matter of course, the effective area 50 is larger than the case where the vertical distance (z) between the finger 10 and the touch panel 2 is larger than a predetermined value (the distance when touching the touch panel 2 is substantially zero) (that is, in the hover state). In the case of the display unit 3). The effective area 50 becomes smaller as the vertical distance (z) between the finger 10 and the touch panel 2 becomes larger, and becomes the largest when the distance (z) is minimized.

  For example, as shown in FIG. 6, the effective area 50 is made narrow so as to include the center 3 </ b> A of the display unit 3, or the width of at least the long sides 201 and 202 facing each other in the rectangle of the effective area 50 ( Is reduced as the vertical distance (z) between the finger 10 and the touch panel 2 increases, or the long sides 201 and 202 of the effective area 50 are set to the vertical distance between the finger 10 and the touch panel 2 (see FIG. As z) becomes larger, it can be considered to move toward the middle line 200 drawn along the long sides 31 and 32 of the rectangle of the display unit 3.

The control unit 6 determines validity / invalidity with respect to the coordinates (x, y, z) of the finger 10 as an indicator as follows.
Here, the following non-detection areas are areas that the control unit 6 cannot recognize. The detection area shown below includes an effective area 50 including the center 2A of the touch panel 2 with respect to the two-dimensional coordinates and an invalid area 40 outside the effective area 50 with respect to the two-dimensional coordinates, and can be recognized by the control unit 6. It is an area. FIG. 7 is a diagram schematically showing a non-detection region and a detection region. In the figure, the non-detection area 60 has an area outside the detection area 70 with respect to the center line 2B of the touch panel 2 with respect to the vertical distance (z) between the finger 10 and the touch panel 2. The detection area 70 includes the invalid area 40 and the valid area 50 as described above.

The initial coordinates of the indicator are defined as follows.
(1-1) When the touch panel 2 in the non-detection state detects an indicator, the coordinates at that time are set as initial coordinates.
(1-2) When the indicator moves from the non-detection area 60 to the detection area 70, the coordinates at that time are set as the initial coordinates.
(1-3) When it is detected that the indicator has entered the detection area 70, the coordinates at that time are set as initial coordinates.

The control unit 6 determines the validity / invalidity of the coordinates (x, y, z) of the indicator based on the definition of the initial coordinates. Here, the indicator is also referred to as finger 10.
(2-1) When the coordinates (x, y, z) of the finger 10 of the initial coordinates (any number of fingers 10) is the invalid area 40, the coordinates (x, y, z) are invalidated.
(2-2) When the invalidated finger 10 moves to the valid area 50 without moving to the non-detection area 60, the coordinates (x, y, z) on the valid area 50 are validated.
(2-3) Unless the invalidated finger 10 moves to the valid area 50, the coordinates (x, y, z) on the invalid area 40 are invalidated.
(2-4) Even when there is an invalidated finger 10 (first finger 10-1), if the second finger 10-2 of the first coordinate is detected in the effective area 50, the second finger The coordinates (x, y, z) of 10-2 are valid. In this case, the second finger 10-2 is notified to the host as the first finger 10-1. For example, when the electronic device is a smartphone, the host is an OS (operating system) used in the smartphone.
(2-5) If the finger 10 once detected in the valid area 50 moves and enters the invalid area 40, the coordinates are not valid and the coordinates are valid.

  The control unit 6 displays the pointer 30 at a position on the screen of the display unit 3 corresponding to the coordinates (x, y) in the effective area 50. At this time, if the pointer 30 is on an icon (not shown) displayed on the display unit 3, it is determined that the user has selected the icon, and the user's finger 10 is touched to the second distance or less. When approaching 2, the function corresponding to the icon is activated.

  FIG. 8 is a flowchart for explaining two-dimensional coordinate validity / invalidity determination processing by the control unit 6. In the figure, the control unit 6 acquires the current coordinates (x, y, z) of the finger 10 output from the touch panel 2 (step S1). Next, it is determined whether or not the acquired coordinate is the first coordinate (step S2), and if it is not the first coordinate (that is, if “NO” is determined in this determination), it is determined whether or not the coordinate is invalidated (step S2). S3). If the coordinate is not invalid (that is, if “NO” is determined in this determination), the acquired coordinate is notified as valid (step S4), and then the process returns to step S1. On the other hand, when the acquired coordinates are the first coordinates (that is, when “YES” is determined in the determination of step S2), or when the coordinates are in an invalid state (that is, “YES” in the determination of step S3). If it is determined that the coordinates are within the invalid area 40 (step S5). If the coordinates are not within the invalid area 40 (that is, if “NO” is determined in this determination), it is assumed that the coordinates are valid. Notified to the OS (step S4), and then returns to step S1. On the other hand, when it is in the invalid area 40 (that is, when “YES” is determined in the determination in step S5), the above-described OS is not notified as being invalid (step S6), and thereafter Return to step S1.

  In the case of (2-1) described above, the route of step S1 → step S2 (“YES”) → step S5 (“YES”) → step S6 is followed. In the case of (2-2), after following the route of (2-1), step S1 → step S2 (“NO”) → step S3 (“YES”) → step S5 (“NO”) → The route of step S4 is traced. In the case of (2-3), after following the route of (2-1), step S1 → step S2 (“NO”) → step S3 (“YES”) → step S5 (“YES”) → The route of step S6 is traced. In the case of (2-4), the route of step S1 → step S2 (“YES”) → step S5 (“NO”) → step S4 is followed. In the case of (2-5), “NO” is determined in step S3 or step S5, and the route of step S4 is followed. Then, step S1 → step S2 (“NO”) → step S3 (“NO”) → step The route of S4 is traced.

  As described above, according to the electronic device 1 according to the present embodiment, the planar display unit 3 is arranged so as to overlap the display unit 3 and is two-dimensional along the surface of the display unit 3 of the finger 10 that is an indicator. A touch panel 2 capable of detecting a coordinate (x, y) and a vertical distance (z) between the finger 10 and a two-dimensional coordinate (x as the vertical distance (z) between the finger 10 and the touch panel 2 increases. , Y), the effective area 50 is narrowed, so that it is possible to sufficiently prevent an operation unintended by the user in a hover operation that enables an operation at a position away from the touch panel 2.

  In the electronic device 1 according to the present embodiment, the effective area (two-dimensional coordinate effective area) may be switched in at least two stages. FIG. 9 is a diagram illustrating an example of switching in two stages.

  Further, in the electronic apparatus 1 according to the present embodiment, a program describing the processing shown in the flowchart of FIG. 8 is stored in the ROM. The program is stored in a magnetic disk, an optical disk, a magneto-optical disk, a flash memory, or the like. It can also be stored in a storage medium and distributed, or stored in a server (not shown) on a network such as the Internet, so that it can be downloaded using a telecommunication line.

  In addition, the electronic device 1 according to the present embodiment is the one in which the present invention is applied to a portable wireless device called a smartphone. However, the electronic device 1 is not limited to the portable wireless device, and home appliances such as a microwave oven, navigation for automobiles, etc. The operation panel can be applied.

  INDUSTRIAL APPLICABILITY The present invention has an effect that an operation unintended by a user can be sufficiently prevented in a hover operation that enables an operation at a position away from the touch panel, and uses a capacitive touch panel such as a smartphone. It can be applied to electronic devices.

DESCRIPTION OF SYMBOLS 1 Electronic device 2 Touch panel 3 Display part 5 Memory | storage part 6 Control part 7 Case 10 Finger 30 Pointer 40 Invalid area 50 Effective area 60 Non-detection area 70 Detection area

Claims (12)

A planar display,
A two-dimensional coordinate disposed along the surface of the display unit of the indicator, and a touch panel capable of detecting a vertical distance from the indicator.
The touch panel
A detection region that is capable of detecting the two-dimensional coordinates and the vertical distance at least less than a first value and greater than a second value smaller than the first value for the vertical distance;
A non-detection region that is larger than the first value for at least the vertical distance and incapable of detecting the two-dimensional coordinates and / or the vertical distance;
Have
The detection area is
A first region including the center of the touch panel with respect to the two-dimensional coordinates, ranging from the first value to the second value with respect to the vertical distance;
A second region that extends from the first value to at least a portion of the second value for the vertical distance and that is outside the first region for the two-dimensional coordinates;
Have
In the first region at the vertical distance of a predetermined value that is between the first value and the second value, the predetermined value increases from the second value toward the first value. Electronic equipment that narrows according to
When the indicator directly enters the first region from the non-detection region that is greater than the first value with respect to the vertical distance, at least the two-dimensional coordinates of the indicator are effective coordinates, When entering the second region from the first region, at least the two-dimensional coordinates of the indicator as effective coordinates,
When the indicator directly enters the second region from the non-detection region, at least the two-dimensional coordinates of the indicator are invalid coordinates, and then enter the first region from the second region. In this case, at least the two-dimensional coordinates of the indicator are effective coordinates, and then, when entering the second region from the first region, at least the two-dimensional coordinates of the indicator are effective coordinates,
Electronics. The electronic device according to claim 1,
The first region narrows in a state including at least the center of the display unit as the vertical distance increases.
Electronics. The electronic device according to claim 2,
The first region narrows toward the center of the display unit as the vertical distance increases.
Electronics. The electronic device according to any one of claims 1 to 3,
The first region is largest when the vertical distance is minimum;
Electronics. The electronic device according to any one of claims 1 to 4,
The first region is switched in at least two stages;
Electronics. The electronic device according to any one of claims 1 to 5,
The display unit and the first region are quadrangular,
The square of the first region is at least smaller than the square of the display unit when the vertical distance is greater than a predetermined value.
Electronics. The electronic device according to claim 6,
The square of the first region becomes smaller as the vertical distance becomes larger.
Electronics. The electronic device according to claim 6 or claim 7,
The quadrangle of the display unit and the first region is a rectangle,
The width of at least the long sides facing each other in the rectangle of the first region becomes narrower as the vertical distance increases.
Electronics. The electronic device according to claim 8,
At least the long side of the first region moves toward the middle line drawn along the long side of the rectangle of the display unit as the vertical distance increases.
Electronics. The electronic device according to any one of claims 1 to 9,
The second value is 0;
Electronics. The electronic device according to any one of claims 1 to 10,
The effective two-dimensional coordinates can be displayed on at least the display unit.
Electronics. A planar display,
A two-dimensional coordinate disposed along the surface of the display unit of the indicator, and a touch panel capable of detecting a vertical distance from the indicator.
The touch panel
A detection region that is capable of detecting the two-dimensional coordinates and the vertical distance at least less than a first value and greater than a second value smaller than the first value for the vertical distance;
A non-detection region that is larger than the first value for at least the vertical distance and incapable of detecting the two-dimensional coordinates and / or the vertical distance;
Have
The detection area is
A first region including the center of the touch panel with respect to the two-dimensional coordinates, ranging from the first value to the second value with respect to the vertical distance;
A second region that extends from the first value to at least a portion of the second value for the vertical distance and that is outside the first region for the two-dimensional coordinates;
Have
In the first region at the vertical distance of a predetermined value that is between the first value and the second value, the predetermined value increases from the second value toward the first value. A coordinate detection method for a pointer that can be used in an electronic device that becomes narrower according to
When the indicator directly enters the first region from the non-detection region, at least the two-dimensional coordinates of the indicator are set as effective coordinates, and then enter the second region from the first region. In the case, at least the two-dimensional coordinates of the indicator are effective coordinates,
When the indicator directly enters the second region from the non-detection region that is greater than the first value with respect to the vertical distance, at least the two-dimensional coordinates of the indicator are invalid coordinates, When entering the first area from the second area, at least the two-dimensional coordinates of the indicator are set as effective coordinates. Next, when entering the second area from the first area, at least the indicator The two-dimensional coordinates are effective coordinates,
Coordinate detection method.

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