Touch panel comprising touch electrodes in two areas in which a distance between two adjacent touch electrodes in the first area differs from that of the second area

Patent metadata

Field	Value
Publication number	US-10114502-B2
Application number	US-201615230851-A
Country	US
Kind code	B2
Filing date	Aug 8, 2016
Priority date	Aug 13, 2015
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A touch panel includes a first touch area and a second touch area. The first touch area includes a plurality of first sensing electrodes electrically insulated from each other. Every two adjacent first sensing electrodes space apart from each other by a first distance. The second touch area includes a plurality of second sensing electrodes electrically insulated from each other. Every two adjacent second sensing electrodes space apart from each other by a second distance. The second distance is less than the first distance. The first sensing electrodes and at least one second sensing electrode detects for touch operation at different time periods.

First claim

What is claimed is:

1. A touch panel comprising:
a first touch area comprising a plurality of first sensing electrodes electrically insulated from each other, every two adjacent first sensing electrodes being spaced from each other by a first distance; and
a second touch area comprising a plurality of second sensing electrodes electrically insulated from each other, every two adjacent second sensing electrodes being spaced from each other by a second distance;
wherein the second distance is less than the first distance;
wherein the first sensing electrodes and at least one of the second sensing electrodes detect for touch operation at different time periods;
wherein the first distance is twice the second distance;
wherein the touch panel comprises a first working mode and a second working mode; wherein in the first working mode, all of the first sensing electrodes and at least one of the second sensing electrodes is in work; wherein in the second working mode, all of the second sensing electrodes are in work, and all of the first sensing electrodes are in an off state;
wherein a number of the second sensing electrodes in the first working mode is less than a number of the second sensing electrodes in the second working mode;
wherein the second sensing electrodes are defined as a first group and a second group, and the second sensing electrodes of the first group and the second sensing electrodes of the second group are alternately arranged;
wherein only one second sensing electrode of the second group is arranged between every two adjacent second sensing electrodes of the first group;
and wherein all of the second sending electrodes are arranged in a column, the first group comprises all odd number second sensing electrodes and the second group comprises all even number second sensing electrodes; wherein in the first working mode, all of the second sensing electrodes of the first group or all of the second sensing electrodes of the second group are in work.

2. The touch panel of claim 1 , wherein the number of the second sensing electrodes in the first working mode is half of the number of the second sensing electrodes in the second working mode.

3. The touch panel of claim 1 , further comprising a driving circuit, a controlling circuit, and a switching circuit; wherein the driving circuit outputs a driving signal, the driving circuit is electrically connected to the second sensing electrodes of the first group; wherein the switching circuit is electrically connected to the driving circuit and the controlling circuit; wherein the controlling circuit exports a control signal to control the switching circuit, the switching circuit controls the driving circuit to selectively and electrically connect to the first sensing electrodes or the second sensing electrodes of the second group, thereby the first sensing electrodes and the second sensing electrodes of the second group detect for touch operation at different time periods.

4. The touch panel of claim 3 , wherein in the first working mode, the controlling circuit controls the driving circuit to electrically connect with the first sensing electrodes; and wherein in the second working mode, the controlling circuit controls the driving circuit to electrically connect with the second group of second sensing electrodes.

5. The touch panel of claim 3 , wherein the first sensing electrodes and the second sensing electrodes are a plurality of touch driving electrodes, and the touch driving electrodes receive a driving signal from the driving circuit.

6. The touch panel of claim 1 , wherein the touch panel further comprises a sensing circuit, a controlling circuit, and a switching circuit; wherein the sensing circuit receives a driving signal, the sensing circuit is electrically connected to the second sensing electrodes of the first group; wherein the switching circuit is electrically connected to the sensing circuit and the controlling circuit; wherein the controlling circuit sends a control signal to control the switching circuit; wherein the switching circuit controls the sensing circuit to selectively and electrically connect to the first sensing electrodes or the second sensing electrodes of the second group, thereby the first sensing electrodes and the second sensing electrodes of the second group detect for touch operation at different time periods.

7. The touch panel of claim 6 , wherein in the first working mode, the controlling circuit controls the sensing circuit to electrically connect to the first sensing electrodes; wherein in the second working mode, the controlling circuit controls the sensing circuit to electrically connect to the second group of second sensing electrodes.

8. The touch panel of claim 6 , wherein the first sensing electrodes and the second sensing electrodes are a plurality of touch sensing electrodes, and the touch sensing electrodes send a driving signal to the sensing circuit.

9. The touch panel of claim 1 , wherein the touch panel comprises a touch area and a peripheral area surrounding the touch area, the touch area comprises the first touch area and the second touch area.

10. The touch panel of claim 1 , wherein the first sensing electrodes and the second sensing electrodes are strip shaped.

11. The touch panel of claim 10 , wherein the first sensing electrodes and the second sensing electrodes extend along a first direction and are positioned along a second direction perpendicular to the first direction.

12. The touch panel of claim 11 , further comprising a plurality of third sending electrodes electrically insulated from the first sensing electrodes and the second sensing electrodes; the third sensing electrodes are strip shaped and extend along the second direction.

Assignees

• Interface Optoelectronic Shenzhen Co Ltd
• General Interface Solution Ltd

Inventors

• Chen Cheng-Ju
• Chan Yung-Chou
• Chen Yen-Hua

Classifications

• G06F3/044

  by capacitive means · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/041661 Primary

  using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window · 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

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title