Signal detecting method of touch panel, touch panel and display device

Patent metadata

Field	Value
Publication number	US-9632631-B2
Application number	US-201414285552-A
Country	US
Kind code	B2
Filing date	May 22, 2014
Priority date	Dec 23, 2013
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A signal detecting method for a touch panel, a touch panel, and a display device are disclosed. The touch panel includes: several driving lines, several sensing lines, several driving electrodes, and several sensing electrodes; and also includes: a driving module configured to provide driving signals to the respective driving electrodes to drive the respective driving electrodes; a first detection module configured to detect a first signal representing a capacitance between a particular driven driving electrode and each of the sensing electrodes; a reusing module configured to, when one of the driving electrode is driven, reuse at least one driving electrode other than the driven driving electrode to additionally function as a sensing electrode; and a second detection module configured to detect a second signal representing a capacitance between the driven driving electrode and the at least one reused driving electrode which additionally functions as a sensing electrode.

First claim

What is claimed is:

1. A signal detecting method for a touch panel, wherein the touch panel comprises a plurality of first electrodes arranged in n rows, and a plurality of second electrodes arranged in m columns, and wherein the method comprises:
(A) sending a driving signal to the i th row of the first electrodes, wherein i=1 . . . n;
(B) detecting a first signal Sii from each column of the second electrodes, wherein i=1 . . . m;
(C) detecting a second signal from one row of the first electrodes excluding the i th row being driven;
(D) repeating steps (A) to (C) to the (i+1) th row; and
(E) determining a touch position based on the first signals and the second signals.

2. The signal detecting method of a touch panel according to claim 1 , further comprising: when detecting a second signal from one row of first electrodes excluding the i th row being driven, grounding at least one row of the first electrodes, which excludes the i th row of first electrodes being driven and the another row of first electrodes being detected.

3. The signal detecting method of a touch panel according to claim 1 , wherein detecting a second signal from another row of first electrodes excluding the i th row being driven comprises:
detecting the second signal from a row of first electrodes adjacent to the i th row of first electrodes being driven.

4. The signal detecting method of a touch panel according to claim 1 , wherein the step (B) and step (C) are simultaneously performed.

5. The signal detecting method of a touch panel according to claim 1 , wherein in step (D), the touch position is determined only based on the first signals and the second signals.

6. A capacitive touch panel, comprising:
a plurality of first electrodes arranged in n rows;
a plurality of second electrodes arranged in m columns;
a driving module configured to provide driving signals to the respective rows of the first electrodes;
a first detection module configured to detecting a first signal Sii from each column of the second electrodes, wherein i=1 . . . m; and
a second detection module configured to detect a second signal from one row of the first electrodes excluding the i th row being driven.

7. The touch panel according to claim 6 , further comprising a ground module configured to, when detecting a second signal from one row of the first electrodes excluding the i th row being driven, ground at least one row which excludes the i th row being driven and another row being detected.

8. The touch panel according to claim 6 , wherein the second detection module is configured to, detect a second signal representing a capacitance between the i th row being driven and a row adjacent to the row being driven.

9. A display device, comprising a touch panel, the touch panel comprising:
a plurality of first electrodes arranged in n rows;
a plurality of second electrodes arranged in m columns;
a driving module configured to provide driving signals to the respective rows of the first electrodes;
a first detection module configured to detecting a first signal Sii from each column of the second electrodes, wherein i=1 . . . m; and
a second detection module configured to detect a second signal from another row of first electrodes excluding the i th row being driven.

10. The display device according to claim 9 , wherein the touch panel further comprises a ground module configured to, when detecting a second signal from one row of first electrodes excluding the i th row being driven, ground at least one row which excludes the i th row being driven and at least one another row being detected.

11. The display device according to claim 9 , wherein the second detection module is configured to, detect a second signal representing a capacitance between the row being driven and a row adjacent to the i th row being driven.

Assignees

• Shanghai Avic Optoelectronics
• Tianma Microelectronics Co Ltd

Inventors

• Li Li
• Wang Xupeng
• Wang Xiangchun

Classifications

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G09G5/006

  Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04) · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title