Touch panel

Patent metadata

Field	Value
Publication number	US-9652102-B2
Application number	US-201514874903-A
Country	US
Kind code	B2
Filing date	Oct 5, 2015
Priority date	Aug 7, 2015
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A touch panel includes a plurality of touch sensing groups. Each of the touch sensing groups includes a central electrode, a plurality of first electrodes and a plurality of second electrodes. The central electrode includes a main body, and has a wavy contour. The first electrodes and the second electrodes are disposed at two sides of the main body along a direction, respectively. Each of the first electrodes includes a first inner edge adaptively spaced from a first edge of the central electrode. Each of the second electrodes includes a second inner edge adaptively spaced from a second edge of the central electrode. One first electrode of the first electrodes overlaps two adjacent second electrodes of the second electrodes in another direction.

First claim

What is claimed is:

1. A touch panel, comprising:
a substrate; and
a plurality of touch sensing groups, arranged along a first direction on the substrate, each of the touch sensing groups comprising:
a central electrode, comprising a main body, a first edge and a second edge, the main body having a wavy contour and extending towards one side of the substrate, the main body comprising a first side and a second side opposite to each other, the first edge being located at the first side of the main body and the second edge being located at the second side of the main body, wherein the main body comprises a plurality of first bent top portions and a plurality of second bent top portions, the first bent top portions and the second bent top portions are sequentially alternately arranged;
a plurality of first electrodes, disposed at the first side of the main body along a second direction, each of the first electrodes comprising a first inner edge adaptively spaced from the first edge of the central electrode, and a first short edge connected to the first inner edge, wherein a center of the first inner edge is disposed correspondingly to one of the second bent top portions, and the first short edge is adjacent to another first electrode of the first electrodes and is disposed correspondingly to one of the first bent top portions; and
a plurality of second electrodes, disposed at the second side of the main body along the second direction, each of the second electrodes comprising a second inner edge adaptively spaced from the second edge of the central electrode;
wherein, one first electrode of the first electrodes overlaps two adjacent second electrodes of the second electrodes in the first direction; and
wherein the first bent top portions protrude towards the first electrodes, and the second bent top portions protrude towards the second electrodes.

2. The touch panel according to claim 1 , wherein the central electrode of each of the touch sensing groups further comprises a plurality of first strip portions and a plurality of second strip portions, the first strip portions of the central electrode protrude from the first side of the main body to form the first edge, and the second strip portions of the central electrode extend from the second side of the main body to form the second edge.

3. The touch panel according to claim 2 , wherein each of the first electrodes of each of the sensing groups comprises a plurality of first gaps, the first gaps are disposed facing the first edge of the central electrode, each of the first strip portions of the central electrode is disposed in single one of the first gaps, and each of the first gaps is disposed with single one of the first strip portions therein.

4. The touch panel according to claim 3 , wherein each of the second electrodes of each of the sensing groups comprises a plurality of second gaps, the second gaps are disposed facing the second edge of the central electrode, each of the second strip portions of the central electrodes is disposed in single one of the second gaps, and each of the second gaps is disposed with single one of the second strip portions therein.

5. The touch panel according to claim 1 , wherein one second electrode of the second electrodes of each of the touch sensing groups further comprises a second short edge connected to the second inner edge of the second electrode, a center of the second short edge of the second electrode is disposed correspondingly to the first bent top portions, and the second short edge is adjacent to another second electrode of the second electrodes and is disposed correspondingly to one of the second bent top portions.

6. The touch panel according to claim 1 , wherein for each of the touch sensing groups, the first electrode of the first electrodes and one second electrode of the two adjacent second electrodes of the second electrodes have a first overlapping length in the first direction, the first electrode and the other second electrode of the two adjacent second electrodes of the second electrodes have a second overlapping length in the second direction, and the first overlapping direction is substantially equal to the second overlapping length.

7. The touch panel according to claim 1 , wherein the main body of the central electrode of each of the touch sensing groups has a sinusoidal curved contour or a triangular wave curved shape.

8. The touch panel according to claim 1 , wherein a length of each of the first electrodes of each of the touch sensing groups in the second direction is greater than a width of each of the touch sensing groups in the first direction, and a length of each of the second electrodes of each of the touch sensing groups in the second direction is greater than the width of each of the touch sensing groups in the first direction.

9. The touch panel according to claim 1 , wherein a width of each of the touch sensing groups in the first direction is smaller than a width of a predetermined touching object.

10. The touch panel according to claim 1 , wherein each of the touch sensing groups further comprises a plurality of first conducting lines and a plurality of second conducting lines, each of the first conducting lines connects to single one of the first electrodes, each of the first electrodes connects to single one of the first conducting lines, each of the second conducting lines connects to single one of the second electrodes, and each of the second electrodes connects to single one of the second conducting lines.

11. The touch panel according to claim 1 , wherein the central electrodes, the first electrodes and the second electrodes are formed from a same transparent conductive pattern layer.

Assignees

• Mstar Semiconductor Inc

Inventors

• Kuo Chao-Yang
• Ho Kai-Ting

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/0448

  Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality · CPC title

• G06F3/0443 Primary

  using a single layer of sensing electrodes · CPC title