Touch panel for reducing pins required for touch detection

Patent metadata

Field	Value
Publication number	US-9811231-B2
Application number	US-201615097288-A
Country	US
Kind code	B2
Filing date	Apr 13, 2016
Priority date	Mar 4, 2016
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A touch panel including a substrate and a touch element is provided. The substrate has a predetermined number of touch areas. The touch element is disposed in the predetermined number of touch areas and includes a plurality of first electrodes, a plurality of second electrodes, and the predetermined number of third electrodes. Each third electrode includes a plurality of third electrode patterns and a plurality of third connection portions. Each third connection portion electrically insulatingly intersects at least one of the first electrodes or at least one of the second electrodes and electrically connects two adjacent third electrode patterns. Several of the first electrodes arranged in a first direction and corresponding to different touch areas are electrically connected, and several of the second electrodes arranged in a second direction and corresponding to different touch areas are electrically connected.

First claim

What is claimed is:

1. A touch panel, comprising:
a substrate comprising a plurality of touch areas; and
a touch element disposed in the touch areas of the substrate and comprising:
a plurality of first electrodes arranged in a first direction in the touch areas, wherein each of the first electrodes comprises a plurality of first electrode patterns;
a plurality of second electrodes electrically insulated from the first electrodes and arranged in a second direction that intersects the first direction in the touch areas, wherein each of the second electrodes comprises a plurality of second electrode patterns, and orthogonal projections of the first electrode patterns and the second electrode patterns on the substrate have a plurality of gaps therebetween; and
a plurality of third electrodes electrically insulated from the first electrodes and the second electrodes, wherein the number of the third electrodes is the same as the number of the touch areas, and each of the touch areas is disposed with one of the third electrodes, wherein each of the third electrodes comprises a plurality of third electrode patterns and a plurality of third connection portions, orthogonal projections of the third electrode patterns on the substrate are located in the gaps, the third electrode patterns do not overlap the first electrode patterns and the second electrode patterns, and each of the third connection portions electrically insulatingly intersects at least one of the first electrodes or at least one of the second electrodes and each of the third connection portions electrically connects adjacent two third electrode patterns, wherein the first electrodes arranged in the first direction and corresponding to different touch areas are electrically connected, and the second electrodes arranged in the second direction and corresponding to different touch areas are electrically connected, so that pins needed for the first electrodes are less than the number of the first electrodes, and the pins needed for the second electrode are less than the number of the second electrodes.

2. The touch panel according to claim 1 , wherein each of the first electrodes further comprises a plurality of first connection portions, and each of the first connection portions connects adjacent two first electrode patterns, each of the second electrodes further comprises a plurality of second connection portions, and each of the second connection portions connects adjacent two second electrode patterns, wherein the first electrode patterns, the second electrode patterns, and the third electrode patterns are distributed in a same layer on the substrate.

3. The touch panel according to claim 2 , wherein the first electrode patterns, the second electrode patterns, and the third electrode patterns respectively have a hexagonal shape, and a portion of the third connection portions are respectively disposed across at least one of the first connection portions and at least one of the second connection portions.

4. The touch panel according to claim 2 , wherein the second direction is perpendicular to the first direction.

5. The touch panel according to claim 2 , wherein a portion of the first electrode patterns respectively comprise a first sub-portion and a second sub-portion, orthogonal projections of the first sub-portion and the second sub-portion on the substrate have a first sub-gap therebetween, each of the first electrodes further comprises a plurality of first sub-connection portions, an orthogonal projection of each of the first sub-connection portions on the substrate is located in one of the first sub-gaps, and each of the first sub-connection portions connects one of the first sub-portions and the corresponding second sub-portion, wherein the first sub-connection portions located in a middle of each of the touch areas intersect the third connection portions, and the third electrode patterns connected with the third connection portions respectively extend into and fill one of the first sub-gaps.

6. The touch panel according to claim 5 , wherein each of the first sub-connection portions located between adjacent two touch areas is disposed across adjacent two third electrode patterns in adjacent two touch areas.

7. The touch panel according to claim 2 , wherein a portion of the second electrode patterns respectively comprise a third sub-portion and a fourth sub-portion, orthogonal projections of the third sub-portion and the fourth sub-portion on the substrate have a second sub-gap therebetween, each of the second electrodes further comprises a plurality of second sub-connection portions, an orthogonal projection of each of the second sub-connection portions on the substrate is located in one of the second sub-gaps, and each of the second sub-connection portions connects one of the third sub-portions and the corresponding fourth sub-portion, wherein the second sub-connection portions located in a middle of each of the touch areas intersect the third connection portions, and the third electrode patterns connected with the third connection portions respectively extend into and fill one of the second sub-gaps.

8. The touch panel according to claim 7 , wherein each of the second sub-connection portions located between adjacent two touch areas is disposed across adjacent two third electrode patterns in adjacent two touch areas.

9. The touch panel according to claim 1 , wherein the touch areas are arranged in an array of (M×N), wherein M and N are positive integers respectively greater than 1, and at least one of M and N is greater than 2, the number of the touch areas is defined by (M×N), every M number of first electrodes across different touch areas are electrically connected in parallel, and every N number of second electrodes across different touch areas are electrically connected in parallel.

Assignees

• Wistron Corp

Inventors

• Huang Tzu-Chieh
• Tang Tung-Yang
• Tseng Hua-Min

Classifications

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G06F3/047 Primary

  using sets of wires, e.g. crossed wires · 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

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title