Display panel and display device

Patent metadata

Field	Value
Publication number	US-11968875-B2
Application number	US-202017263462-A
Country	US
Kind code	B2
Filing date	Sep 7, 2020
Priority date	Aug 20, 2020
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

The present application provides a display panel and a display device. The display panel includes an array substrate, a pixel definition layer, an organic light-emitting layer, a cathode layer, an encapsulation layer, and an absorption layer. The absorption layer is arranged on one side of the pixel definition layer away from the array substrate. The absorption layer is arranged corresponding to at least a portion of the pixel definition layer in a curved display region for selectively absorbing at least one color light, so as to reduce a risk of color shift in a white screen at large viewing angles without causing color shift of images at a vertical viewing angle.

First claim

What is claimed is:

1. A display panel, comprising a flat display region and a curved display region located on at least one side of the flat display region, wherein the display panel further comprises:
an array substrate;
a pixel definition layer disposed on the array substrate, wherein the pixel definition layer defines a plurality of pixel definition openings;
an organic light-emitting layer disposed in the pixel definition opening and configured to emit various color lights;
a cathode layer disposed on the pixel definition layer and the organic light-emitting layer;
an encapsulation layer disposed on the cathode layer; and
an absorption layer disposed on one side of the pixel definition layer away from the array substrate, wherein the absorption layer comprises a red light absorber coating, a green light absorber coating, or a blue light absorber coating, the absorption layer is disposed corresponding to at least a portion of the pixel definition layer in the curved display region for selectively absorbing at least one color light emitted by the organic light emitting layer disposed in the curved display region,
wherein the plurality of color lights emitted by the organic light-emitting layer at least comprise a first color light, a second color light, and a third color light; in a vertical viewing angle, a brightness ratio of the first color light in the flat display region to the first color light in the curved display region is greater than a brightness ratio of the second color light in the flat display region to the second color light in the curved display region, and the brightness ratio of the second color light in the flat display region to the second color light in the curved display region is equal to a brightness ratio of the third color light in the flat display region to the third color light in the curved display region; and the absorption layer absorbs at least a portion of the first color light.

2. The display panel according to claim 1 , wherein the absorption layer is disposed between the pixel-definition layer and the cathode layer.

3. The display panel according to claim 1 , wherein the absorption layer is disposed between the cathode layer and the encapsulation layer.

4. The display panel according to claim 1 , wherein the absorption layer is disposed on the encapsulation layer.

5. The display panel according to claim 1 , wherein the encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer sequentially stacked on the cathode layer, and the absorption layer is disposed inside the encapsulation layer.

6. The display panel according to claim 5 , wherein a thickness of the first inorganic encapsulation layer and a thickness of the second inorganic encapsulation layer range from 1 nm to 10 μm, and a thickness of the organic encapsulation layer ranges from 10 nm to 20 μm.

7. The display panel according to claim 1 , wherein the first color light, the second color light, and the third color light are red light, green light, and blue light in any sequence; and the first color light, the second color light, and the third color light are different colors.

8. The display panel according to claim 1 , wherein the curved display regions are located at opposite two sides of the flat display region, and each of the curved display regions is bent in a direction away from a display direction of the display panel.

9. The display panel according to claim 1 , wherein a thickness of the absorption layer ranges from 0.01 μm to 10 μm.

10. A display panel comprising a flat display region and a curved display region located on at least one side of the flat display region, wherein the display panel further comprises:
an array substrate;
a pixel definition layer disposed on the array substrate, wherein the pixel definition layer defines a plurality of pixel definition openings;
an organic light-emitting layer disposed in the pixel definition opening and configured to emit various color lights;
a cathode layer disposed on the pixel definition layer and the organic light-emitting layer;
an encapsulation layer disposed on the cathode layer; and
an absorption layer disposed on one side of the pixel definition layer away from the array substrate, wherein the absorption layer is disposed corresponding to at least a portion of the pixel definition layer in the curved display region for selectively absorbing at least one color light emitted by the organic light emitting layer disposed in the curved display region,
wherein the plurality of color lights emitted by the organic light emitting layer at least comprise a first color light, a second color light, and a third color light in a vertical viewing angle, a brightness ratio of the first color light in the flat display region to the first color light in the curved display region is greater than a brightness ratio of the second color light in the flat display region to the second color light in the curved display region, and the brightness ratio of the second color light in the flat display region to the second color light in the curved display region is equal to a brightness ratio of the third color light in the flat display region to the third color light in the curved display region; and the absorption layer absorbs at least a portion of the first color light.

11. The display panel according to claim 10 , wherein the absorption layer is disposed between the pixel definition layer and the cathode layer.

12. The display panel according to claim 10 , wherein the absorption layer is disposed between the cathode layer and the encapsulation layer.

13. The display panel according to claim 10 , wherein the absorption layer is disposed on the encapsulation layer.

14. The display panel according to claim 10 , wherein the encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer sequentially stacked on the cathode layer, and the absorption layer is disposed inside the encapsulation layer.

15. The display panel according to claim 14 , wherein the absorption layer is arranged between the first inorganic encapsulation layer and the organic encapsulation layer.

16. The display panel according to claim 14 , wherein the absorption layer is arranged between the organic encapsulation layer and the second inorganic encapsulation layer.

17. The display panel according to claim 10 , wherein the first color light, the second color light, and the third color light are red light, green light, and blue light in any sequence; and the first color light, the second color light, and the third color light are different colors.

18. A display device, comprising the display panel of claim 10 .

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Wang Kan

Classifications

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K59/12 Primary

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8792 Primary

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/50

  OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements · CPC title