TOUCH PANEL AND ELECTRONIC DEVICE

• US 20140184957A1
• Filed: 11/27/2012
• Published: 07/03/2014
• Est. Priority Date: 12/16/2011
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Satou, Mitsuru, Hirouchi, Yasuyuki
• Granted Patent: US 9,182,869 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• 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

A 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 with the one transmission electrode, and overlaid on the second sensor panel. A transmission signal identical to that for the one transmission electrode can be applied on the predetermined electrode.

Claims

1. A touch panel comprising:

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 with the one transmission electrode, and overlaid on the second sensor panel,

wherein a transmission signal identical to that for the one transmission electrode can be applied on the predetermined electrode.

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

3. The touch panel according to claim 1, wherein the predetermined electrode can be set at a predetermined constant potential.

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

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

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

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

9. The touch panel 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 touch panel 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 touch panel 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 touch panel according to claim 11, wherein the two opposite sides are longer sides.

13. A touch panel unit comprising:

a touch panel module including a protection glass, the touch panel according to claim 1, and a board on which a touch panel controller is mounted; and

a display device overlaid on the touch panel module.

14-80. -80. (canceled)