Touch panel and electronic device

• US 9,052,791 B2
• Filed: 11/07/2014
• Issued: 06/09/2015
• Est. Priority Date: 12/16/2011
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Inventors: Satou, Mitsuru, Hirouchi, Yasuyuki
• Primary Examiner(s): BOYD, JONATHAN A
• Application Number:
  US14/535,922
• Publication Number:
  US 20150062083A1
• Time in Patent Office: 214 Days
• Field of Search: 345/173
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133331 Cover glasses
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1643 the display being associated to a digitizer, e.g. laptops that can be used as penpads details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615
• CPC Class Codes: G06F 1/169 the I/O peripheral being an integrated pointing device, e.g. trackball in the palm rest area, mini-joystick integrated between keyboard keys, touch pads or touch stripes G06F1/1643 takes precedence; constructional details of pointing devices G06F3/033
• 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 2203/0339 Touch strips, e.g. orthogonal touch strips to control cursor movement or scrolling; single touch strip to adjust parameter or to implement a row of soft keys
• 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 3/016 Input arrangements with force or tactile feedback as computer generated output to the user
• CPC Class Codes: G06F 3/0236 using selection techniques to select from displayed items
• CPC Class Codes: G06F 3/03547 Touch pads, in which fingers can move on a surface
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: G06F 3/04886 by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus

Abstract

An electronic device includes a touch panel. The touch panel includes a first sensor panel including at least one receiving electrode; a second sensor panel including at least one transmission electrode, and overlaid on the first sensor panel; and a third sensor panel including a predetermined electrode at least a part of which overlaps the one transmission electrode, and overlaid on the second sensor panel. When a predetermined condition is detected in a state that a transmission signal identical to that for the one transmission electrode is applied on the predetermined electrode, application of the transmission signal identical to that for the one transmission electrode onto the predetermined electrode is stopped.

Claims

1. An electronic device comprising:

a touch panel including;

a first sensor panel including at least one receiving electrode;

a second sensor panel including at least one transmission electrode, and overlaid on the first sensor panel; and

a third sensor panel including a predetermined electrode, at least a part of the predetermined electrode overlapping the one transmission electrode, the third sensor panel being overlaid on the second sensor panel,

wherein when a predetermined condition is detected in a state that a transmission signal identical to a transmission signal for the one transmission electrode is applied on the predetermined electrode, application of the transmission signal identical to the transmission signal for the one transmission electrode onto the predetermined electrode is stopped.

2. The electronic device according to claim 1, wherein the first sensor panel serves also as the third sensor panel.

3. The electronic device according to claim 1, wherein when the predetermined condition is detected in the state that the transmission signal identical to the transmission signal for the one transmission electrode is applied on the predetermined electrode, the application of the transmission signal identical to the transmission signal for the one transmission electrode onto the predetermined electrode is stopped, and then the predetermined electrode can be set at a predetermined constant potential.

4. The electronic device according to claim 1, wherein 90% or more of an area of the first sensor panel overlaps the second sensor panel.

5. The electronic device according to claim 1, wherein 90% or more of an area of the third sensor panel overlaps the second sensor panel.

6. The electronic device according to claim 1, wherein the predetermined electrode is arranged in a periphery of the touch panel.

7. The electronic device according to claim 6, wherein a part of the predetermined electrode is arranged between an edge of the touch panel and a point that internally divides the edge of the touch panel and a center of the touch panel into a ratio of 1 to 4 along a line passing through the center of the touch panel.

8. The electronic device according to claim 7, wherein the center of the touch panel is a center of gravity of the touch panel.

9. The electronic device according to claim 6, wherein the predetermined electrode is arranged in an outermost periphery of a response region in the third sensor panel.

10. The electronic device according to claim 1, wherein the third sensor panel is quadrangular;

and

wherein the predetermined electrode is arranged along at least one side of the quadrangle.

11. The electronic device according to claim 10, wherein the quadrangle is a rectangle;

and

wherein the predetermined electrode is arranged along each of two opposite sides of the rectangle.

12. The electronic device according to claim 11, wherein the two opposite sides are longer sides of the rectangle.

13. The electronic device according to claim 1, wherein when the predetermined condition is detected in the state that the transmission signal identical to the transmission signal for the one transmission electrode is applied on the predetermined electrode, the predetermined electrode is set at a predetermined constant potential.

14. The electronic device according to claim 1, wherein the predetermined condition is a detected grasping by a person.

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

a display device overlaid on the touch panel.

16. The electronic device according to claim 15, wherein in the state that the transmission signal identical to the transmission signal for the one transmission electrode is applied on the predetermined electrode, the display device performs a predetermined display;

and

wherein in a state that the transmission signal identical to the transmission signal for the one transmission electrode is not applied on the predetermined electrode, the display device does not perform the predetermined display.

17. A transmission signal application method employable in an electronic device including a touch panel that includes a first sensor panel including at least one receiving electrode;

a second sensor panel including at least one transmission electrode, and overlaid on the first sensor panel; and

a third sensor panel including a predetermined electrode, at least a part of the predetermined electrode overlapping the one transmission electrode, and the third sensor panel being overlaid on the second sensor panel,

the method comprising, stopping application of a transmission signal identical to a transmission signal for the one transmission electrode onto the predetermined electrode, when a predetermined condition is detected in a state that the transmission signal identical to the transmission signal for the one transmission electrode is applied on the predetermined electrode.