Touch display panel, method for determining touch position and display device

• US 9,830,027 B2
• Filed: 06/26/2013
• Issued: 11/28/2017
• Est. Priority Date: 03/29/2013
• Status: Active Grant

• 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: Li, Cheng
• Primary Examiner(s): SHERMAN, STEPHEN G
• Application Number:
  US14/347,907
• Publication Number:
  US 20150205403A1
• Time in Patent Office: 1,616 Days
• Field of Search: 345173-178, 345104, 178 1801- 1809, 178 1811
• 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 3/0445 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 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

Embodiments of the invention disclose a touch display panel, a method for determining touch position and a display device. The touch display panel includes a TFT array substrate having gate lines and an opposite substrate having a black matrix. At least one of the gate lines is used as a touch scanning line, at least one touch sensing line is provided on the black matrix of the opposite substrate, and a touch capacitor is formed at an intersection between the touch scanning line and the touch sensing line.

Claims

1. A touch display panel, comprising a thin film transistor (TFT) array substrate having gate lines and an opposite substrate having a black matrix;

wherein

at least one of the gate lines is used as a touch scanning line;

at least one touch sensing line is provided on the black matrix of the opposite substrate, and the touch sensing line is provided within the region of the black matrix in a display region of the touch display panel;

a touch capacitor is formed at an intersection between the touch scanning line and the touch sensing line;

at least one pixel of the touch display panel is formed as a touch region, and the touch capacitor is formed in the touch region; and

the gate line which corresponds to a blue sub-pixel in a certain pixel in the touch region is selected as the touch scanning line and the touch capacitor of the touch region is only provided in the blue sub-pixel.

2. The touch display panel according to claim 1, wherein the touch sensing line is provided on the black matrix on a lower surface of the opposite substrate;

and a first conductive layer is provided on a surface of the touch sensing line.

3. The touch display panel according to claim 2, wherein a second conductive layer is provided on an upper surface of the TFT array substrate, the second conductive layer is provided at the intersection between the touch sensing line and the touch scanning line;

and a position of the first conductive layer on the opposite substrate corresponds to a position of the second conductive layer on the TFT array substrate.

4. The touch display panel according to claim 3, wherein the touch capacitor is formed between the touch scanning line and the second conductive layer.

5. The touch display panel according to claim 4, wherein an extending direction of the touch sensing line and an extending direction of the touch scanning line are perpendicular to each other.

6. The touch display panel according to claim 4, wherein each black matrix on the opposite substrate corresponds to one touch sensing line.

7. The touch display panel according to claim 4, wherein a position of the touch sensing line on the lower surface of the opposite substrate corresponds to a position of a data line on the upper surface of the TFT array substrate one by one.

8. The touch display panel according to claim 2, wherein a filler is formed between the first conductive layer and the touch sensing line.

9. A display device, comprising the touch display panel according to claim 1.

10. The display device according to claim 9, wherein the touch sensing line is provided on the black matrix on a lower surface of the opposite substrate;

and a first conductive layer is provided on a surface of the touch sensing line.

11. The display device according to claim 10, wherein a second conductive layer is provided on an upper surface of the TFT array substrate, the second conductive layer is provided at the intersection between the touch sensing line and the touch scanning line;

and a position of the first conductive layer on the opposite substrate corresponds to a position of the second conductive layer on the TFT array substrate.

12. The display device according to claim 11, wherein the touch capacitor is formed between the touch scanning line and the second conductive layer.

13. The display device according to claim 12, wherein an extending direction of the touch sensing line and an extending direction of the touch scanning line are perpendicular to each other.

14. The display device according to claim 12, wherein each black matrix on the opposite substrate corresponds to one touch sensing line.

15. The display device according to claim 12, wherein a position of the touch sensing line on the lower surface of the opposite substrate corresponds to a position of a data line on the upper surface of the TFT array substrate one by one.

16. The display device according to claim 10, wherein a filler is formed between the first conductive layer and the touch sensing line.

17. A method for determining touch position, employing the touch display panel according to claim 1, wherein the method comprises:

applying a scanning signal to the touch scanning line;

detecting a voltage signal output from the touch sensing line;

determining the touch scanning line and the touch sensing line that correspond to a touch position according to the detected voltage signal and the scanning signal applied to the touch scanning line; and

determining the touch position according to an intersection of the touch scanning line and the touch sensing line that has been determined.