In-cell touch module, its driving method, touch display panel and display device

Patent metadata

Field	Value
Publication number	US-2016357306-A1
Application number	US-201514889159-A
Country	US
Kind code	A1
Filing date	Mar 18, 2015
Priority date	Nov 28, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

The present disclosure provides an in-cell touch module including N data lines arranged on an array substrate, and common electrodes insulated from, and arranged at a layer different from, the data lines. A (2n-1) th data line and a (2n) th data line are connected to each other through a switch, n is a positive integer, 2n is less than or equal to N, and N is an integer greater than 1. The common electrodes include a plurality of strip-like common electrodes and a plurality of U-shaped common electrodes. Each strip-like common electrode crosses the data lines, each U-shaped common electrode surrounds the respective strip-like common electrode, and each strip-like common electrode is insulated from each U-shaped common electrode. Each strip-like common electrode is connected to a capacitive touch sensing signal line, and an open end of each U-shaped common electrode is connected to an electromagnetic touch scanning line.

First claim

1 . An in-cell touch module, comprising N data lines arranged on an array substrate, and common electrodes insulated from, and arranged at a layer different from, the data lines,
wherein a (2n-1) th data line and a (2n) th data line are connected to each other through a switch, n is a positive integer, 2n is less than or equal to N, and N is an integer greater than 1; the common electrodes comprise a plurality of strip-like common electrodes and a plurality of U-shaped common electrodes; each strip-like common electrode crosses the data lines, each U-shaped common electrode surrounds the respective strip-like common electrode, and each strip-like common electrode is insulated from each U-shaped common electrode; and each strip-like common electrode is connected to a capacitive touch sensing signal line, and an open end of each U-shaped common electrode is connected to an electromagnetic touch scanning line.

2 . The in-cell touch module according to claim 1 , wherein a gate metal layer, a gate insulating layer, an active layer and a source/drain metal layer are arranged sequentially on the array substrate, the source/drain metal layer includes the plurality of data lines, an insulating layer is deposited onto the array substrate with the source/drain metal layer, and the strip-like common electrodes and the U-shaped common electrodes are arranged on the insulating layer.

3 . The in-cell touch module according to claim 2 , wherein the insulating layer is a passivation layer or an organic resin layer.

4 . The in-cell touch module according to claim 2 , wherein a first via-hole and a second via-hole are provided in the insulating layer, the source/drain metal layer comprises the capacitive touch sensing signal line and the electromagnetic touch scanning signal line, the strip-like common electrode is connected to the capacitive touch sensing signal line through the first via-hole, and the U-shaped common electrode is connected to the electromagnetic touch scanning signal line through the second via-hole.

5 . The in-cell touch module according to claim 1 , wherein the U-shaped common electrodes and the strip-like common electrodes are arranged in an interdigitated manner.

6 . The in-cell touch module according to claim 1 , wherein the two adjacent U-shaped common electrodes are opened in opposite directions.

7 . The in-cell touch module according to claim 1 , wherein the two adjacent U-shaped common electrodes are opened in an identical direction.

8 . A method for driving the in-cell touch module according to claim 1 , comprising, within each display period, steps of:
at a display stage, turning off a switch, controlling data lines to receive a display data signal, and controlling strip-like common electrodes and U-shaped common electrodes to receive a common electrode signal; at a capacitive touch stage, turning off the switch, using the data lines as capacitive touch driving electrodes, using the strip-like common electrodes as capacitive touch sensing electrodes, controlling the data lines to sequentially receive a capacitive touch scanning signal, and determining coordinates of a touch point in accordance with a capacitive touch sensing signal transmitted by the strip-like common electrodes to a capacitive touch sensing signal line, thereby achieving the capacitive touch; and at an electromagnetic touch stage, turning on the switch, connecting a (2n-1) th data line to a (2n) th data line to serve as a first electromagnetic touch electrode, using the U-shaped common electrodes as a second electromagnetic electrode, controlling an electromagnetic touch scanning signal line to apply an electromagnetic touch scanning signal to the first electromagnetic touch electrode and the second electromagnetic touch electrode, and detecting a first electromagnetic touch sensing signal of the first electromagnetic touch electrode and a second electromagnetic touch sensing signal of the second electromagnetic touch electrode, thereby achieving the electromagnetic touch.

9 . A touch display panel comprising the in-cell touch module according to claim 1 .

10 . A display device comprising the touch display panel according to claim 9 .

11 . The in-cell touch module according to claim 2 , wherein the U-shaped common electrodes and the strip-like common electrodes are arranged in an interdigitated manner.

12 . The in-cell touch module according to claim 2 , wherein the two adjacent U-shaped common electrodes are opened in opposite directions.

13 . The in-cell touch module according to claim 2 , wherein the two adjacent U-shaped common electrodes are opened in an identical direction.

14 . The in-cell touch module according to claim 3 , wherein the U-shaped common electrodes and the strip-like common electrodes are arranged in an interdigitated manner.

15 . The in-cell touch module according to claim 3 , wherein the two adjacent U-shaped common electrodes are opened in opposite directions.

16 . The in-cell touch module according to claim 3 , wherein the two adjacent U-shaped common electrodes are opened in an identical direction.

17 . The in-cell touch module according to claim 4 , wherein the U-shaped common electrodes and the strip-like common electrodes are arranged in an interdigitated manner.

18 . The in-cell touch module according to claim 4 , wherein the two adjacent U-shaped common electrodes are opened in opposite directions.

19 . The in-cell touch module according to claim 4 , wherein the two adjacent U-shaped common electrodes are opened in an identical direction.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zou Xiangxiang

Classifications

• G06F3/046

  by electromagnetic means · CPC title

• G02F1/13338 Primary

  Input devices, e.g. touch panels · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · 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