Pixel driving circuit, pixel driving method, array substrate and display panel

Patent metadata

Field	Value
Publication number	US-10629124-B2
Application number	US-201715570928-A
Country	US
Kind code	B2
Filing date	May 19, 2017
Priority date	Sep 26, 2016
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A pixel driving circuit, a pixel driving method, an array substrate, a display device, and a display panel are disclosed. The pixel driving circuit includes a switching subcircuit, a plurality of clock signal lines, a data writing subcircuit and a driving subcircuit.

First claim

The invention claimed is:

1. An array substrate comprising a plurality of pixel structures and a pixel driving circuit for driving the pixel structures, the pixel structure comprising a plurality of subpixels for emitting light of different colors, subpixels in the plurality of pixel structures for emitting light of a same color being controlled by a same clock signal line,
wherein the pixel driving circuit comprises a switching subcircuit, a plurality of clock signal lines, a data writing subcircuit, and a driving subcircuit, wherein,
a control terminal of the switching subcircuit is connected to a gate line, an input terminal of the switching subcircuit is connected to a data line, and an output terminal of the switching subcircuit is connected to a plurality of input terminals of the data writing subcircuit;
a plurality of control terminals of the data writing subcircuit are connected to corresponding clock signal lines, respectively, and a plurality of output terminals of the data writing subcircuit are connected to a plurality of control terminals of the driving subcircuit in one-to-one correspondence;
a plurality of input terminals of the driving subcircuit are connected to a power line, and a plurality of output terminals of the driving subcircuit are connected to corresponding subpixels to be driven, respectively,
wherein an electrode of the pixel structure farthest from the light exit direction of the pixel structure comprises a reflective electrode layer, and remaining electrodes of the pixel structure are made of a transparent conductive material, and the transparent conductive material includes 2,3,6,7,10,11-hexacyano-1,4,5,8,9,12-hexaazatriphenylene.

2. The array substrate according to claim 1 , wherein an insulating layer is included between adjacent electrode layers of the pixel structure.

3. The array substrate according to claim 1 , wherein two adjacent subpixels share a common electrode layer, and the common electrode layer acts as an anode or a cathode of one of the two adjacent subpixels while acting as an anode or a cathode of the other of the two adjacent subpixels.

4. A display panel comprising the array substrate according to claim 1 .

5. A display device comprising the display panel according to claim 4 .

6. The array substrate according to claim 1 , wherein the switching subcircuit comprises a first transistor, a gate of the first transistor being connected to the gate line, a first terminal of the first transistor being connected to the data line, a second terminal of the first transistor being connected to a corresponding input terminal of the data writing subcircuit.

7. The array substrate according to claim 1 , wherein the data writing subcircuit comprises a plurality of second transistors, a gate of each second transistor being connected to a corresponding clock signal line, a first terminal of each second transistor being connected to the output terminal of the switching subcircuit, a second terminal of each second transistor being connected to a corresponding control terminal of the driving subcircuit in one-to-one correspondence.

8. The array substrate according to claim 1 , wherein the driving subcircuit comprises a plurality of third transistors, a gate of each third transistor being connected to a corresponding output terminal of the data writing subcircuit in one-to-to correspondence, a first terminal of each third transistor being connected to the power line, a second terminal of each third transistor being connected to a corresponding subpixel to be driven.

9. The array substrate according to claim 1 , wherein the subpixels to be driven include a first color subpixel, a second color subpixel, and a third color subpixel, and the pixel driving circuit includes three clock signal lines.

10. The array substrate according to claim 1 , wherein the pixel structure comprises a plurality of stacked subpixels for emitting light of different colors, the plurality of subpixels includes green subpixels, red subpixels and blue subpixels arranged successively in a light exit direction, and each of the subpixels comprises an anode, a cathode, and an organic light emitting layer sandwiched between the anode and the cathode.

11. The array substrate according to claim 1 , wherein the switching subcircuit comprises a first transistor, a gate of the first transistor being connected to the gate line, a first terminal of the first transistor being connected to the data line, a second terminal of the first transistor being connected to a corresponding input terminal of the data writing subcircuit.

12. The array substrate according to claim 1 , wherein the data writing subcircuit comprises a plurality of second transistors, a gate of each second transistor being connected to a corresponding clock signal line, a first terminal of each second transistor being connected to the output terminal of the switching subcircuit, a second terminal of each second transistor being connected to a corresponding control terminal of the driving sub circuit in one-to-one correspondence.

13. The array substrate according to claim 1 , wherein the driving subcircuit comprises a plurality of third transistors, a gate of each third transistor being connected to a corresponding output terminal of the data writing subcircuit in one-to-to correspondence, a first terminal of each third transistor being connected to the power line, a second terminal of each third transistor being connected to a corresponding subpixel to be driven.

14. The pixel driving circuit according to claim 1 , wherein the subpixels to be driven include a first color subpixel, a second color subpixel, and a third color subpixel, and the pixel driving circuit includes three clock signal lines.

15. An array substrate comprising a plurality of pixel structures and a pixel driving circuit for driving the pixel structures, the pixel structure comprising a plurality of subpixels for emitting light of different colors, subpixels in the plurality of pixel structures for emitting light of a same color being controlled by a same clock signal line,
wherein the pixel driving circuit comprises a switching subcircuit, a plurality of clock signal lines, a data writing subcircuit, and a driving subcircuit, wherein,
a control terminal of the switching subcircuit is connected to a gate line, an input terminal of the switching subcircuit is connected to a data line, and an output terminal of the switching subcircuit is connected to a plurality of input terminals of the data writing subcircuit;
a plurality of control terminals of the data writing subcircuit are connected to corresponding clock signal lines, respectively, and a plurality of output terminals of the data writing subcircuit are connected to a plurality of control terminals of the driving subcircuit in one-to-one correspondence;
a plurality of input terminals of the driving subcircuit are connected to a power line, and a plurality of output terminals of the driving subcircuit are connected to corresponding subpixels to be driven, respectively,
wherein all the cathodes of the pixel structure other than the electrode farthest from the light exit direction of the pixel structure include 2,3,6,7,10,11-hexacyano-1,4,5,8,9,12-hexaazatriphenylene, and all the anodes other than the electrode farthest from the light exit direction of the pixel structure includes one or more of a transparent conductive oxide layer and a transparent metal layer.

16. The array substrate according to claim 15 , wherein the pixel structure comprises a plurality of stacked subpixels for emitting light of different colors, the plurality

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Quanhu
• Li Yongqian
• Xu Pan
• Wang Yu
• Meng Song
• Yang Fei
• Zhang Baoxia
• Gai Cuili
• Wang Ling
• Lin Yicheng
• Cao Kun
• Wang Longyan
• Wu Yue

Classifications

• G09G3/3275

  Details of drivers for data electrodes · CPC title

• G09G3/3225 Primary

  using an active matrix · CPC title

• G09G2310/0264

  Details of driving circuits · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title

• G09G3/2003

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title