Display panel and display device

Patent metadata

Field	Value
Publication number	US-2024282757-A1
Application number	US-202218025066-A
Country	US
Kind code	A1
Filing date	Jun 20, 2022
Priority date	Jun 20, 2022
Publication date	Aug 22, 2024
Grant date	—

Abstract

Provided is a display panel. The display panel includes: a substrate; a plurality of light emitting elements, disposed on the substrate; an optical adjustment pattern, disposed on a side, departing from the substrate, of the light emitting elements, wherein the optical adjustment pattern includes a first bump structure corresponding to at least one light emitting element of the plurality of light emitting units, an overlapping region being present between an orthographic projection of the first bump structure on the substrate and an orthographic projection of the light emitting element corresponding to the first bump structure on the substrate, an area of the overlapping region being less than an area of the orthographic projection of the light emitting element on the substrate; and a first planarization layer, disposed on a side, departing from the light emitting element, of the optical adjustment pattern.

First claim

1 . A display panel, comprising:
a substrate; a plurality of light emitting elements, disposed on the substrate; an optical adjustment pattern, disposed on a side, departing from the substrate, of the light emitting elements, wherein the optical adjustment pattern comprises a first bump structure corresponding to at least one light emitting element of the plurality of light emitting units, an overlapping region being present between an orthographic projection of the first bump structure on the substrate and an orthographic projection of the light emitting element corresponding to the first bump structure on the substrate, an area of the overlapping region being less than an area of the orthographic projection of the light emitting element on the substrate; and a first planarization layer, disposed on a side, departing from the light emitting element, of the optical adjustment pattern, wherein a refractive index of the first planarization layer is greater than a refractive index of the optical adjustment pattern.

2 . The display panel according to claim 1 , wherein the light emitting elements comprise at least two types of light emitting elements, and the first bump structure comprises at least one sub-bump;
wherein the at least two types of light emitting elements comprise a first color light emitting element and a second color light emitting element, a sub-bump parameter of the first bump structure corresponding to the first color light emitting element is different from a sub-bump parameter of the first bump structure corresponding to the second color light emitting element, and the sub-bump parameter comprises at least one of a quantity and a size of the sub-bumps.

3 . The display panel according to claim 2 , wherein in at least one direction parallel to the substrate, an attenuation parameter of the first color light emitting element is less than an attenuation parameter of the second color light emitting element, the attenuation parameter being a ratio of a luminance of the light emitting element at a specified emitting angle to a maximum luminance of the light emitting element in the at least one direction parallel to the substrate;
wherein a quantity of the sub-bumps of the first bump structure corresponding to the first color light emitting element is greater than a quantity of the sub-bumps of the first bump structure corresponding to the second color light emitting element.

4 . The display panel according to claim 2 , wherein in at least one direction parallel to the substrate, an attenuation parameter of the first color light emitting element is less than an attenuation parameter of the second color light emitting element, the attenuation parameter being a ratio of a luminance of the light emitting element at a specified emitting angle to a maximum luminance of the light emitting element in the at least one direction parallel to the substrate;
wherein at least one sub-bump of the first bump structure is a strip bump, and a length of the strip bump corresponding to the first color light emitting element is greater than a length of the strip bump corresponding to the second color light emitting element.

5 . The display panel according to claim 1 , wherein the plurality of light emitting elements comprise at least one target light emitting element, an attenuation parameter of the target light emitting element in a first direction being less than an attenuation parameter in a second direction, the first direction and the second direction being parallel to the substrate, the first direction being perpendicular to the second direction, the attenuation parameter being a ratio of a luminance of the light emitting element at a specified emitting angle to a maximum luminance of the light emitting element in the at least one direction parallel to the substrate;
wherein the first bump structure comprises at least one sub-bump, the at least one sub-bump of the first bump structure is a strip bump, a length direction of the strip bump corresponding to the target light emitting element being parallel to the second direction.

6 . The display panel according to claim 1 , wherein the first bump structure comprises a plurality of sub-bumps, the sub-bumps being strip bumps, length directions of the plurality of strip bumps being intersected with each other.

7 . The display panel according to claim 1 , wherein the first bump structure comprises a plurality of sub-bumps, the sub-bumps being strip bumps, length directions of the plurality of strip bumps being parallel to each other, the plurality of strip bumps being spaced apart.

8 . The display panel according to claim 1 , wherein the first bump structure comprises at least one sub-bump, the at least one sub-bump of the first bump structure being a block bump, an edge of an orthographic projection of the block bump on the substrate being spaced from an edge of an orthographic projection of the light emitting element corresponding to the block bump on the substrate.

9 . The display panel according to claim 1 , further comprising: a pixel definition layer, wherein the pixel definition layer is disposed on a side, facing towards the substrate, of the optical adjustment pattern, the pixel definition layer comprises a plurality of pixel openings, and the light emitting elements are disposed in the pixel openings;
wherein the optical adjustment pattern further comprises a second bump structure, the second bump structure comprises a plurality of first openings, an orthographic projection of the pixel opening on the substrate is within an orthographic projection of the first opening on the substrate, and an orthographic projection of the first bump structure on the substrate is within the orthographic projection of the first opening on the substrate.

10 . The display panel according to claim 9 , wherein the first bump structure and the second bump structure are disposed in one layer and are formed by one-time patterning process.

11 . The display panel according to claim 10 , wherein the first bump structure comprises at least one sub-bump, the sub-bump being a strip bump, both ends of the strip bump being connected to the second bump structure.

12 . The display panel according to claim 9 , wherein the first bump structure comprises at least one sub-bump, the sub-bump being a strip bump, an orthographic projection of the strip bump on the substrate being in contact with two opposite edges of an orthographic projection of the pixel opening on the substrate along a third direction, the third direction being a length direction of the strip bump.

13 . The display panel according to claim 1 , wherein a center of an orthographic projection of the first bump structure on the substrate is coincident with a center of an orthographic projection of the light emitting element corresponding to the first bump structure on the substrate.

14 . The display panel according to claim 1 , wherein a center of an orthographic projection of the first bump structure on the substrate is in a determined direction of a center of an orthographic projection of the light emitting element corresponding to the first bump structure on the substrate.

15 . The display panel according to claim 1 , wherein the first bump structure comprises at least one sub-bump, the sub-bump has a top surface, a bottom surface and a side surface connecting the bottom surface and the top surface, and an angle between the side surface and the bottom surface is an acute angle.

16 . The display panel according to claim 1 , further comprising: an organic package layer, wherein the organic package layer is dispose

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Li Ruoxiang
• Li Lu
• Hu Yao
• Chen Qian
• Yang Chenbiao
• Xia Liang

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/855 Primary

  Optical field-shaping means, e.g. lenses · CPC title

• H01L33/58

  Electricity · mapped topic

• H01L25/0753 Primary

  Electricity · mapped topic