Touch display panel, manufacturing method thereof, driving method thereof and touch display device

Patent metadata

Field	Value
Publication number	US-10042495-B2
Application number	US-201615217049-A
Country	US
Kind code	B2
Filing date	Jul 22, 2016
Priority date	Aug 24, 2015
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A touch display panel, a manufacturing method and a driving method thereof and a touch display device are provided. The touch display panel includes an array substrate, a plurality of subpixels and a driver chip for outputting a signal to cathode layers in each subpixel group. Each subpixel includes an anode layer, a light-emitting layer and a cathode layer; one subpixel group is formed by at least two adjacent subpixels and cathode layers of the subpixels in a same subpixel group are connected. The driver chip is electrically connected with a cathode layer of at least one subpixel in the subpixel group through a conductive wire, and configured to output a common voltage signal to cathode layers in each subpixel group in a display period of one frame and to output a touch drive signal to the cathode layers in each subpixel group in a touch period of one frame.

First claim

What is claimed is:

1. A touch display panel, comprising:
an array substrate;
a plurality of subpixels arranged in a matrix and disposed on the array substrate, wherein each subpixel comprises an anode layer, a light-emitting layer and a cathode layer which are sequentially disposed on the array substrate; the anode layers of the subpixels are independent from each other; at least two adjacent subpixels form a subpixel group; and the cathode layers of the subpixels in a same subpixel group are connected with each other, and the cathode layers of the subpixels in different subpixel groups are not connected; and
a driver chip configured to output a signal to the cathode layers in each subpixel group, wherein
the driver chip is electrically connected with the cathode layer of at least one subpixel in each subpixel group through a conductive wire;
in a display period of a frame, the driver chip is configured to output a common voltage signal to the cathode layers in each subpixel group; and in a touch period of the frame, the driver chip is configured to output a touch drive signal to the cathode layers in each subpixel group.

2. The touch display panel according to claim 1 , wherein the array substrate comprises a data line; and the data line of the array substrate and the conductive wire are arranged in a same layer and made from a same material.

3. The touch display panel according to claim 2 , wherein the array substrate further comprises: a planarization layer covering the conductive wire and a pixel defining layer covering the planarization layer; and
the cathode layer of the subpixel is connected with the conductive wire via a through hole running through the planarization layer and the pixel defining layer.

4. The touch display panel according to claim 2 , wherein the array substrate further comprises: a planarization layer covering the conductive wire, an electric conductor disposed on the planarization layer, and a pixel defining layer covering the electric conductor; and
the electric conductor is connected with the conductive wire via a first through hole in the planarization layer, and the cathode layer of the subpixel is connected with the electric conductor via a second through hole in the pixel defining layer.

5. The touch display panel according to claim 4 , wherein the electric conductor and the anode layers of the subpixels are arranged in a same layer and made from a same material.

6. The touch display panel according to claim 4 , wherein the array substrate further comprises: a base substrate, a buffer layer, a gate insulating layer, an insulating interlayer, a thin-film transistor and a gate line;
the buffer layer, the gate insulating layer and the insulating interlayer are disposed on the base substrate in sequence; the thin film transistor comprises: a gate electrode, an active layer, a source electrode and a drain electrode;
the buffer layer covers the base substrate; the active layer is disposed between the buffer layer and the gate insulating layer; the gate electrode and the gate line are disposed between the gate insulating layer and the insulating interlayer; the conductive wire, the source electrode, the drain electrode and the data line are disposed between the planarization layer and the insulating interlayer; the gate electrode is connected with the gate line; the source electrode is connected with the data line; the drain electrode is connected with the anode layer; and both the source electrode and the drain electrode are connected with the active layer.

7. The touch display panel according to claim 4 , wherein the electric conductor is an island electric conductor.

8. The touch display panel according to claim 1 , wherein the subpixel group comprises m rows and n columns of the subpixels; and the cathode layers of the subpixels in a (xp+1) th row and a (yq+1) th column are electrically connected with the driver chip through conductive wires respectively,
wherein each of p and q is a constant; p is evenly divisible by m; q is evenly divisible by n; each of x and y is a natural number; xp+1 is smaller than or equal to m; and yq+1 is smaller than or equal to n.

9. The touch display panel according to claim 1 , wherein a number of the conductive wires respectively connected with the cathode layers in the subpixel group far away from the driver chip is greater than a number of the conductive wires respectively connected with the cathode layers in the subpixel group close to the driver chip.

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

11. The touch display panel according to claim 1 , wherein in the touch period of the frame, the cathode layers in each subpixel group are used as a touch electrode.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Yang Ming
• Dong Xue
• Chen Xiaochuan
• Wang Haisheng
• Liu Yingming
• Li Yanchen

Classifications

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title