In-cell touch display device

• US 9,081,458 B2
• Filed: 11/25/2013
• Issued: 07/14/2015
• Est. Priority Date: 12/25/2012
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: Zhou, Xingyao, Yao, Qijun, Wang, Lihua
• Primary Examiner(s): ABDIN, SHAHEDA A
• Application Number:
  US14/089,650
• Publication Number:
  US 20140176490A1
• Time in Patent Office: 596 Days
• Field of Search: 345/174, 345/87, 345/173, 345/156, 178 1801- 1809, 349/139
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G09G 3/36 using liquid crystals

Abstract

An in-cell touch display device is disclosed. The device includes a color filter substrate, a Thin Film Transistor array substrate, and a liquid crystal layer disposed between the color filter substrate and the Thin Film Transistor array substrate. The color filter substrate includes a grid black matrix layer, a touch layer, and a color filter layer, where the touch layer includes a plurality of metal grid electrodes. In addition, each electrode is aligned with the grid of the black matrix layer in a light transmission direction, and a density of the metal grid electrodes adjacent to the edge of the metal grid electrodes is greater than a density of the metal grid electrodes adjacent to the center of metal grid electrodes.

Claims

1. An in-cell touch display device, comprising:

a color filter substrate,

a Thin Film Transistor array substrate, and

a liquid crystal layer disposed between the color filter substrate and the Thin Film Transistor array substrate,

wherein the color filter substrate comprises;

a grid black matrix layer,

a touch layer, and

a color filter layer;

wherein the touch layer comprises a plurality of metal grid electrodes, wherein each electrode is aligned with the grid of the black matrix layer in a light transmission direction, and wherein a density of the metal grid electrodes adjacent to the edge of the metal grid electrodes is greater than a density of the metal grid electrodes adjacent to the center of metal grid electrodes.

2. The in-cell touch display device of claim 1, wherein the density of the metal grid electrodes decreases gradually from the edge of the metal grid electrodes to the center of the metal grid electrodes.

3. The in-cell touch display device of claim 1, wherein the color filter comprises a plurality of sub-pixels, and a ratio of the density of the metal grid electrodes to the density of the sub-pixel units ranges from 1:

1 to 1;

12.

4. The in-cell touch display device of claim 1, wherein the touch layer comprises a horizontal connecting line and a vertical connecting line, wherein the horizontal connecting line and the vertical connecting line cross each other, and the horizontal connecting line and/or the vertical connecting line are formed by metal grids.

5. The in-cell touch display device of claim 4, wherein a ratio of the density of the metal grids of the horizontal connecting line and/or the vertical connecting line to the density of the sub-pixel units is 1:

1.

6. The in-cell touch display device of claim 4, wherein the touch layer comprises a first metal layer, a second metal layer, and an insulation layer between the first metal layer and the second metal layer.

7. The in-cell touch display device of claim 6, wherein the first metal layer of the touch layer comprises drive electrodes, sense electrodes and a vertical connecting line which connects a plurality of the drive electrodes together as a drive line, and wherein the second metal layer comprises a horizontal connecting line which passes through the insulation layer and connects a plurality of the sense electrodes together as a sense line.

8. The in-cell touch display device of claim 6, wherein the second metal layer of the touch layer comprises drive electrodes, sense electrodes and a vertical connecting line which connects a plurality of the drive electrodes together as a drive line, and wherein the first metal layer comprises a horizontal connecting line which passes through the insulation layer and connects a plurality of the sense electrodes together as a sense line.

9. The in-cell touch display device of claim 6, wherein the first metal layer of the touch layer comprises drive electrodes and a vertical connecting line which connects a plurality of the drive electrodes together as a drive line, and wherein the second metal layer comprises sense electrodes and a horizontal connecting line which connects a plurality of the sense electrodes together as a sense line.

10. The in-cell touch display device of claim 1, wherein the line width of each metal grid ranges from 0.1 μ

m to 10 μ

m.

11. The in-cell touch display device of claim 1, wherein the shape of the each metal grid is a rectangle shape or a diamond shape.

12. The in-cell touch display device of claim 1, wherein the metal grid electrodes are drive electrodes and/or sense electrodes.