Display panel and display device

Patent metadata

Field	Value
Publication number	US-12356799-B2
Application number	US-202117439771-A
Country	US
Kind code	B2
Filing date	Aug 3, 2021
Priority date	Jul 20, 2021
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

The present application provides a display panel and a display device. The display panel includes: a cathode inhibition layer disposed on a side of the pixel definition layer and between light-emitting units, a cathode disposed on a side of a light-emitting layer away from a substrate, and a color filter layer disposed on the cathode away from the substrate, wherein a thickness of the cathode on the cathode inhibition layer is less than a thickness of the cathode on the light-emitting unit. A light shielding portion of the color filter layer includes a light-permeable aperture configured corresponding to the cathode inhibition layer, and a light transmittance of a light-permeable material in the light-permeable aperture is greater than a light transmittance of the light shielding portion.

First claim

What is claimed is:

1. A display panel, comprising: a normal display area and a functional display area, wherein the display panel comprises:
a substrate, comprising a pixel definition layer defining a plurality of openings;
a light-emitting layer disposed on a side of the substrate, the light-emitting layer comprising a plurality of light-emitting units corresponding to the openings;
a cathode inhibition layer disposed on a side of the pixel definition layer, at least configured in the functional display area, and disposed between the light-emitting units;
a cathode disposed on a side of the light-emitting layer away from the substrate, wherein a thickness of the cathode on the cathode inhibition layer is less than a thickness of the cathode on the light-emitting units; and
a color filter layer disposed on a side of the cathode away from the substrate, the color filter layer comprising a plurality of color resists corresponding to the light-emitting units, and a light shielding portion configured between adjacent two of the color resists, the light shielding portion comprising a light-permeable aperture configured corresponding to the cathode inhibition layer, the light-permeable aperture filled with a light-permeable material, wherein a light transmittance of the light-permeable material is greater than a light transmittance of the light shielding portion;
wherein the cathode inhibition layer comprises a plurality of cathode inhibition portions disposed between the light-emitting units, and an area of an orthographic projection of light-permeable aperture projected on the cathode inhibition layer is greater than or equal to an area of the cathode inhibition portion;
wherein a shape of the orthographic projection of the light-permeable aperture projected on the cathode inhibition layer is same as a shape of a corresponding cathode inhibition portion;
wherein an aperture size of the light-permeable aperture at a side close to the cathode inhibition layer is smaller than an aperture size of the light-permeable aperture at a side away from the cathode inhibition layer.

2. The display panel according to claim 1 , wherein a distance between the orthographic projection of the light-permeable aperture projected on the light-emitting layer and adjacent one of the light-emitting units ranges from 2 micrometers to 10 micrometers.

3. The display panel according to claim 1 , wherein the aperture size of the light-permeable aperture is gradually decreased from being far away the cathode inhibition layer to close to the cathode inhibition layer.

4. The display panel according to claim 1 , wherein a refractive index of the light-permeable material is greater than a refractive index of the light shielding portion.

5. The display panel according to claim 4 , wherein an angle between a side surface of the light-permeable aperture and a plane where the color filter layer is located is greater than or equal to 30 degrees and less than 90 degrees.

6. The display panel according to claim 4 , wherein the color resist comprises a red color resist, a green color resist and a blue color resist, and the light shielding portion comprises a black color resist.

7. The display panel according to claim 4 , wherein the color resist comprises a red color resist, a green color resist, and a blue color resist, and the light shielding portion comprises a blue color resist.

8. The display panel according to claim 1 , wherein a thickness of the cathode on the cathode inhibition layer is zero.

9. The display panel according to claim 1 , wherein a pixel density in the functional display area is less than or equal to a pixel density in the normal display area.

10. The display panel according to claim 1 , wherein an area ratio of the cathode inhibition layer in the functional display area ranges 5% to 95%.

11. The display panel according to claim 1 , wherein each of the light-emitting units comprises: an anode exposed through one of the openings, and a light-emitting function layer provided in the opening and in contact with the anode.

12. The display panel according to claim 1 , wherein the display panel further comprises a thin-film encapsulation layer disposed between the color filter layer and the cathode.

13. The display panel according to claim 1 , wherein an orthographic projection shape of the light-permeable aperture projected on the cathode inhibition layer comprises a shape of a circle, a rectangle, or a square.

14. The display panel according to claim 1 , wherein the substrate further comprises: a base substrate, a semiconductor layer disposed on the base substrate, a gate insulating layer covering the semiconductor layer, a gate electrode disposed on the gate insulating layer, an interlayer insulating layer covering the gate electrode, a source electrode and a drain electrode disposed on the interlayer insulating layer, a planar layer covering the source electrode and the drain electrode, and the pixel definition layer disposed on the planar layer.

15. The display panel according to claim 1 , wherein the cathode comprises a non-entire surface covering type electrode.

16. A display device, comprising the display panel according to claim 1 , and an optical component arranged corresponding to the functional display area of the display panel.

17. A display panel, comprising: a normal display area and a functional display area, wherein the display panel comprises:
a substrate, comprising a pixel definition layer defining a plurality of openings;
a light-emitting layer disposed on a side of the substrate, the light-emitting layer comprising a plurality of light-emitting units corresponding to the openings;
a cathode inhibition layer disposed on a side of the pixel definition layer, at least configured in the functional display area, and disposed between the light-emitting units;
a cathode disposed on a side of the light-emitting layer away from the substrate, wherein a thickness of the cathode on the cathode inhibition layer is less than a thickness of the cathode on the light-emitting units; and
a color filter layer disposed on a side of the cathode away from the substrate, the color filter layer comprising a plurality of color resists corresponding to the light-emitting units, and a light shielding portion configured between adjacent two of the color resists, the light shielding portion comprising a light-permeable aperture configured corresponding to the cathode inhibition layer, the light-permeable aperture filled with a light-permeable material, wherein a light transmittance of the light-permeable material is greater than a light transmittance of the light shielding portion;
the color resist comprising a red resist, a green resist, and a blue resist, the light shielding portion comprising a blue resist, and a refractive index of the light-permeable material is greater than a refractive index of the light shielding portion;
wherein the cathode inhibition layer comprises a plurality of cathode inhibition portions disposed between the light-emitting units, and an area of an orthographic projection of light-permeable aperture projected on the cathode inhibition layer is greater than or equal to an area of the cathode inhibition portion;
wherein a shape of the orthographic projection of the light-permeable aperture projected on the cathode inhibition layer is same as a shape of a corresponding cathode inhibition portion;
wherein an aperture size of the light-permeable aperture at a side close to the cathode inhibition layer is smaller than an aperture size of the light-permeable aperture at a side away from

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Lv Lei
• Jin Meng
• Yuan Tao
• Huang Jinchang

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/80521

  characterised by their shape · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/38

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