OLED pixel structure and OLED display panel

Patent metadata

Field	Value
Publication number	US-11296153-B2
Application number	US-201916622392-A
Country	US
Kind code	B2
Filing date	Dec 3, 2019
Priority date	Nov 26, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

The present disclosure provides an organic light emitting diode pixel structure and an organic light emitting diode display panel including the same. The organic light emitting diode pixel structure includes a driving circuit layer, a light emitting function layer, and a color resist layer. The driving circuit layer includes pixel driving circuits. The color resist layer includes color resists arranged in an array. The pixel driving circuits are disposed in interval regions outside long sides of the color resists. Because size of the pixel driving circuits is much larger than a width of traces, each width between adjacent pixels is increased. This avoids light leakage caused by pixel intervals being too small.

First claim

What is claimed is:

1. An organic light emitting diode pixel structure, comprising a plurality of sub-pixel structures arranged in an array, and further comprising:
a color resist layer comprising a plurality of color resists arranged in an array, wherein each of the color resists corresponds to one sub-pixel structure and comprises two opposite long sides and two opposite short sides; and
a driving circuit layer comprising a plurality of pixel driving circuits, a plurality of sensing signal lines, a plurality of power signal lines, and a plurality of data signal lines, wherein
each of the pixel driving circuits is configured for driving one sub-pixel structure to emit light and comprises a first thin film transistor, a second thin film transistor, a third thin film transistor, and a storage capacitor that are arranged in a column in a direction parallel to the long sides in an interval region between one long side of one corresponding color resist and one adjacent long side of one adjacent color resist in a direction parallel to the short sides; and
each of the pixel driving circuits is electrically connected to one sensing signal line, one power signal line, and one data signal line that are arranged in the interval region and parallel to the long sides.

2. The organic light emitting diode pixel structure according to claim 1 , wherein each pixel driving circuit is disposed in the interval region near a left long side of the corresponding color resist.

3. The organic light emitting diode pixel structure according to claim 1 , wherein each pixel driving circuit is disposed in the interval region near a right long side of the corresponding color resist.

4. The organic light emitting diode pixel structure according to claim 1 , wherein the short sides are straight lines.

5. The organic light emitting diode pixel structure according to claim 1 , wherein the short sides are convex arcs.

6. The organic light emitting diode pixel structure according to claim 1 , wherein a width of the interval region in the direction parallel to the short sides is 30 μm to 60 μm.

7. The organic light emitting diode pixel structure according to claim 1 , wherein a width of a space between one short side of one corresponding color resist and one adjacent short side of one adjacent color resist in the direction parallel to the long sides is 20 μm to 40 μm.

8. The organic light emitting diode pixel structure according to claim 1 , further comprising:
a light emitting function layer disposed on the driving circuit layer, wherein the color resist layer is disposed between the driving circuit layer and the light emitting function layer.

9. The organic light emitting diode pixel structure according to claim 1 , further comprising:
a light emitting function layer disposed on the driving circuit layer, wherein the color resist layer is disposed on a side of the light emitting function layer away from the driving circuit layer.

10. The organic light emitting diode pixel structure according to claim 1 , wherein a source electrode of the first thin film transistor is electrically connected to a first electrode of the storage capacitor and a gate electrode of the third thin film transistor, and a second electrode of the storage capacitor is electrically connected to a source electrode of the second thin film transistor and a source electrode of the third thin film transistor.

11. An organic light emitting diode display panel, comprising an organic light emitting diode pixel structure, wherein the organic light emitting diode pixel structure comprises a plurality of sub-pixel structures arranged in an array and further comprises:
a color resist layer comprising a plurality of color resists arranged in an array, wherein each of the color resists corresponds to one sub-pixel structure and comprises two opposite long sides and two opposite short sides; and
a driving circuit layer comprising a plurality of pixel driving circuits, a plurality of sensing signal lines, a plurality of power signal lines, and a plurality of data signal lines, wherein
each of the pixel driving circuits is configured for driving one sub-pixel structure to emit light and comprises a first thin film transistor, a second thin film transistor, a third thin film transistor, and a storage capacitor that are arranged in a column in a direction parallel to the long sides in an interval region between one long side of one corresponding color resist and one adjacent long side of one adjacent color resist in a direction parallel to the short sides; and
each of the pixel driving circuits is electrically connected to one sensing signal line, one power signal line, and one data signal line that are arranged in the interval region and parallel to the long sides.

12. The organic light emitting diode display panel according to claim 11 , wherein each pixel driving circuit is disposed in the interval region near a left long side of the corresponding color resist.

13. The organic light emitting diode display panel according to claim 11 , wherein each pixel driving circuit is disposed in the interval region near a right long side of the corresponding color resist.

14. The organic light emitting diode display panel according to claim 11 , wherein the short sides are straight lines.

15. The organic light emitting diode display panel according to claim 11 , wherein the short sides are convex arcs.

16. The organic light emitting diode display panel according to claim 11 , wherein a width of the interval region between two adjacent long sides of the color resists in the direction parallel to the short sides is 30 μm to 60 m.

17. The organic light emitting diode display panel according to claim 11 , wherein a width of a space between one short side of one corresponding color resist and one adjacent short side of one adjacent color resist in the direction parallel to the long sides is 20 μm to 40 μm.

18. The organic light emitting diode display panel according to claim 11 , further comprising:
a light emitting function layer disposed on the driving circuit layer, wherein the color resist layer is disposed between the driving circuit layer and the light emitting function layer.

19. The organic light emitting diode display panel according to claim 11 , further comprising:
a light emitting function layer disposed on the driving circuit layer, wherein the color resist layer is disposed on a side of the light emitting function layer away from the driving circuit layer.

20. The organic light emitting diode display panel according to claim 11 , wherein a source electrode of the first thin film transistor is electrically connected to a first electrode of the storage capacitor and a gate electrode of the third thin film transistor, and a second electrode of the storage capacitor is electrically connected to a source electrode of the second thin film transistor and a source electrode of the third thin film transistor.

Assignees

• Shenzhen China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Li Dongwei

Classifications

• G09G2300/0842

  forming a memory circuit, e.g. a dynamic memory with one capacitor · CPC title

• G09G3/3225 Primary

  using an active matrix · CPC title

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G2300/0452

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