ELECTRONIC DEVICE AND COORDINATE DETECTION METHOD

• US 20140320429A1
• Filed: 03/04/2014
• Published: 10/30/2014
• Est. Priority Date: 04/26/2013
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: TAKANO, Tomoki, YAMAGUCHI, Takeshi
• Granted Patent: US 9,594,407 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 1/1694 the I/O peripheral being a single or a set of motion sensors for pointer control or gesture input obtained by sensing movements of the portable computer
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

An electronic device includes a housing, a planar display section, a planar transparent member, a touch panel layer which detects two-dimensional coordinates of an indicator having a predetermined conductivity along a surface of the display section and a vertical distance to the indicator, and an acceleration detection section which detects at least one of an acceleration of the housing and an acceleration of the transparent member. The two-dimensional coordinates are determined as effective coordinates when the vertical distance is equal to or smaller than a first value. The two-dimensional coordinates are determined as the effective coordinates when the vertical distance is more than the first value and is equal to or smaller than a second value more than the first value, and the acceleration detection section detects a predetermined acceleration.

Claims

1. An electronic device comprising:

a housing;

a planar display section disposed in the housing;

a planar transparent member having a predetermined transmittance, disposed so as to overlap the display section, and having a part exposed from the housing;

a touch panel layer disposed so as to overlap the display section and disposed between the display section and the transparent member, and configured to detect two-dimensional coordinates of an indicator having a predetermined conductivity along a surface of the display section and a vertical distance to the indicator from the surface of the display section; and

an acceleration detection section configured to detect at least one of an acceleration of the housing and an acceleration of the transparent member,

wherein the two-dimensional coordinates are determined as effective coordinates when the vertical distance is equal to or smaller than a first value; and

wherein the two-dimensional coordinates are determined as the effective coordinates when the vertical distance is more than the first value and is equal to or smaller than a second value more than the first value, and the acceleration detection section detects a predetermined acceleration.

2. The electronic device according to claim 1, further comprising:

a depression detection section configured to detect a warp of the transparent member,

wherein the two-dimensional coordinates are determined as the effective coordinates when the vertical distance is equal to or smaller than the first value; and

wherein the two-dimensional coordinates are determined as the effective coordinates when the vertical distance is more than the first value and is equal to or smaller than the second value, and at least one of the depression detection section detects a predetermined warp and the acceleration detection section detects the predetermined acceleration is satisfied.

3. The electronic device according to claim 2, wherein the two-dimensional coordinates are determined as the effective coordinates when the vertical distance is equal to or smaller than the first value, and at least one of the depression detection section detects the predetermined warp and the acceleration detection section detects the predetermined acceleration is satisfied;

and

wherein the two-dimensional coordinates are determined as the effective coordinates when the vertical distance is more than the first value and is equal to or smaller than the second value, and at least one of the depression detection section detects the predetermined warp and the acceleration detection section detects the predetermined acceleration is satisfied.

4. The electronic device according to claim 1, wherein the predetermined acceleration includes an acceleration having a first frequency and an acceleration having a second frequency higher than the first frequency.

5. The electronic device according to claim 1, wherein the display section is configured to display corresponding to the effective coordinates.

6. The electronic device according to claim 1, wherein the first value is 0.

7. The electronic device according to claim 1, wherein the transparent member and the touch panel layer are integrated into one piece.

8. The electronic device according to claim 2, wherein the display section is in the shape of a quadrangle;

and

wherein the depression detection section is disposed along at least a side of the quadrangle.

9. The electronic device according to claim 8, wherein the display section is in the shape of a rectangle;

and

wherein the depression detection section is disposed along at least one of short sides of the rectangle.

10. The electronic device according to claim 9, wherein a home key is provided on a side of a predetermined short side of the rectangle;

and

wherein the depression detection section is disposed along the predetermined short side.

11. The electronic device according to claim 2, wherein at least a part of the depression detection section is disposed so as to overlap the touch panel layer.

12. The electronic device according to claim 2, wherein the depression detection section is disposed on the transparent member.

13. The electronic device according to claim 2, wherein the depression detection section is disposed on the touch panel layer.

14. The electronic device according to claim 2, wherein the depression detection section is disposed on the display section.

15. The electronic device according to claim 2, wherein the transparent member is a first transparent member;

wherein the display section includes a planar second transparent member and a third transparent member disposed so as to overlap the planar second transparent member;

wherein the planar second transparent member is disposed at a position closer to the touch panel layer than the third transparent member;

wherein a part of the third transparent member protrudes outward from the planar second transparent member at an end of the display section; and

wherein the depression detection section is disposed on a part of at least one of the transparent member and the touch panel layer corresponding to the protruding part of the third transparent member.

16. The electronic device according to claim 15, wherein the second transparent member and the third transparent member constitute a liquid crystal display section or an organic EL display section.

17. The electronic device according to claim 1, wherein the display section and the transparent member are spaced apart from each other by a predetermined distance.

18. A coordinate detection method usable in an electronic device including a housing, a planar display section disposed in the housing, a planar transparent member having a predetermined transmittance, disposed so as to overlap the display section, and having at least a part exposed from the housing, a touch panel layer disposed so as to overlap the display section and disposed between the display section and the transparent member, and configured to detect two-dimensional coordinates of an indicator having a predetermined conductivity along a surface of the display section and a vertical distance to the indicator from the surface of the display section, and an acceleration detection section configured to detect at least one of an acceleration of the housing and an acceleration of the transparent member, the coordinate detection method comprising:

determining the two-dimensional coordinates as effective coordinates when the vertical distance is equal to or smaller than a first value; and

determining the two-dimensional coordinates as the effective coordinates when the vertical distance is more than the first value and is equal to or smaller than a second value more than the first value, and the acceleration detection section detects a predetermined acceleration.