CAPACITIVE IN-CELL TOUCH SCREEN PANEL AND DISPLAY DEVICE

• US 20150029148A1
• Filed: 05/16/2013
• Published: 01/29/2015
• Est. Priority Date: 03/28/2013
• Status: Abandoned Application

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Wang, Chunlei, Dong, Xue, Che, Chuncheng, Xue, Hailin, Wang, Haisheng, Wang, Lei, Xie, Jianyun, Yang, Shengji, Zhao, Weijie
• Application Number:
  US14/344,226
• Publication Number:
  US 20150029148A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• 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 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

The present disclosure relates to a capacitive in-cell touch screen panel and a display device in which first touch detecting electrodes and second touch detecting electrodes insulated with each other are provided on a substrate; the first touch detecting electrodes are located between the substrate and the black matrix, the second touch detecting electrodes are located on a side of the black matrix away from the substrate. Because the first touch detecting electrodes and the second touch detecting electrodes are provided on the substrate away from the TFT array substrate, it is possible to avoid mutual interference between touch signals and display signals in the TFT array substrate, thereby not only ensuring the quality of pictures on a liquid crystal display but also enhancing reliability of touch operations.

Claims

1. A capacitive in-cell touch screen panel comprising:

a substrate, a black matrix provided on the substrate, first touch detecting electrodes located between the substrate and the black matrix, and second touch detecting electrodes located a side of the black matrix away from the substrate.

2. The touch screen panel of claim 1, wherein the black matrix has opening regions arranged in matrix;

the first touch detecting electrodes extend in a row direction of the opening regions, the second touch detecting electrodes extend in a column direction of the opening regions;

or

the second touch detecting electrodes extend in a row direction of the opening regions, the first touch detecting electrodes extend in a column direction of the opening regions.

3. The touch screen panel of claim 1, wherein a material for the first touch detecting electrodes is a metal material or a transparent conducting material;

a material for the second touch detecting electrodes is a metal material or a transparent conducting material.

4. The touch screen panel of claim 1, wherein a material for the first touch detecting electrodes is a metal material, and orthogonal projections of the first touch detecting electrodes on the substrate is inside an orthogonal projection of the black matrix;

a material for the second touch detecting electrodes is a metal material, and orthogonal projections of the second touch detecting electrodes on the substrate is inside an orthogonal projection of the black matrix.

5. The touch screen panel of claim 1, wherein a material for the first touch detecting electrodes is a transparent conducting material, and the first touch detecting electrodes are of a diamond shaped electrode structure;

and

a material for the second touch detecting electrodes is a transparent conducting material, and the second touch detecting electrodes are of a diamond shaped electrode structure.

6. The touch screen panel of claim 1, wherein the first touch detecting electrodes and/or the second touch detecting electrodes comprise inward contracting structures at overlapping positions between the first touch detecting electrodes and the second touch detecting electrodes.

7. The touch screen panel of claim 1, wherein a material for the first touch detecting electrodes is a transparent conducting material;

in a display time interval, the first touch detecting electrodes are grounded; and

in a touch time interval, the first touch detecting electrodes couple touch scanning signals applied by the second touch detecting electrodes and output results.

8. The touch screen panel of claim 7, wherein a material for the second touch detecting electrodes is a transparent conducting material, and the second touch detecting electrodes constitute a common electrode layer;

in a display time interval, the second touch detecting electrodes are applied with common electrode signals; and

in a touch time interval, the second touch detecting electrodes are applied with touch scanning signals.

9. The touch screen panel of claim 1, wherein a material for the first touch detecting electrodes is a transparent conducting material;

in a display time interval, the first touch detecting electrodes are grounded; and

in a touch time interval, the first touch detecting electrodes are applied with touch scanning signals.

10. The touch screen panel of claim 9, wherein a material for the second touch detecting electrodes is a transparent conducting material, and the second touch detecting electrodes constitute a common electrode layer;

in a display time interval, the second touch detecting electrodes are applied with common electrode signals; and

in a touch time interval, the second touch detecting electrodes couple the touch scanning signals and output results.

11. A display device comprising the capacitive in-cell touch screen panel according to claim 1.

12. The touch screen panel of claim 2, wherein the first touch detecting electrodes and/or the second touch detecting electrodes comprise inward contracting structures at overlapping positions between the first touch detecting electrodes and the second touch detecting electrodes.

13. The touch screen panel of claim 2, wherein a material for the first touch detecting electrodes is a transparent conducting material;

in a display time interval, the first touch detecting electrodes are grounded; and

in a touch time interval, the first touch detecting electrodes couple touch scanning signals applied by the second touch detecting electrodes and output results.

14. The touch screen panel of claim 13, wherein a material for the second touch detecting electrodes is a transparent conducting material, and the second touch detecting electrodes constitute a common electrode layer;

in a display time interval, the second touch detecting electrodes are applied with common electrode signals; and

in a touch time interval, the second touch detecting electrodes are applied with touch scanning signals.

15. The touch screen panel of claim 2, wherein a material for the first touch detecting electrodes is a transparent conducting material;

in a display time interval, the first touch detecting electrodes are grounded; and

in a touch time interval, the first touch detecting electrodes are applied with touch scanning signals.

16. The touch screen panel of claim 15, wherein a material for the second touch detecting electrodes is a transparent conducting material, and the second touch detecting electrodes constitute a common electrode layer;

in a display time interval, the second touch detecting electrodes are applied with common electrode signals; and

in a touch time interval, the second touch detecting electrodes couple the touch scanning signals and output results.

17. The touch screen panel of claim 5, wherein a material for the first touch detecting electrodes is a transparent conducting material;

in a display time interval, the first touch detecting electrodes are grounded; and

in a touch time interval, the first touch detecting electrodes couple touch scanning signals applied by the second touch detecting electrodes and output results.

18. The touch screen panel of claim 17, wherein a material for the second touch detecting electrodes is a transparent conducting material, and the second touch detecting electrodes constitute a common electrode layer;

in a display time interval, the second touch detecting electrodes are applied with common electrode signals; and

in a touch time interval, the second touch detecting electrodes are applied with touch scanning signals.

19. The touch screen panel of claim 5, wherein a material for the first touch detecting electrodes is a transparent conducting material;

in a display time interval, the first touch detecting electrodes are grounded; and

in a touch time interval, the first touch detecting electrodes are applied with touch scanning signals.

20. The touch screen panel of claim 19, wherein a material for the second touch detecting electrodes is a transparent conducting material, and the second touch detecting electrodes constitute a common electrode layer;

in a display time interval, the second touch detecting electrodes are applied with common electrode signals; and

in a touch time interval, the second touch detecting electrodes couple the touch scanning signals and output results.