Display panel including light emitting device groups, light exiting part groups and optical structure units, and display apparatus

Patent metadata

Field	Value
Publication number	US-12520694-B2
Application number	US-202117795354-A
Country	US
Kind code	B2
Filing date	Sep 29, 2021
Priority date	Sep 29, 2021
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

A display panel and a display apparatus are disclosed. The display panel includes multiple light emitting device groups, multiple light exiting part groups and multiple optical structure units, wherein each light emitting device group includes multiple light emitting devices including first and second light emitting devices, for emitting light of a preset color; each light exiting part groups includes first and second color conversion parts; an orthographic projection of each optical structure unit on the first base substrate covers an orthographic projection of at least one light emitting device group on the first base substrate, each optical structure unit is to direct light emitted by the first and second light emitting devices to the first and second color conversion parts, respectively, the first and second color conversion parts are to convert light of the preset color into light of a first color and light of a second color, respectively.

First claim

What is claimed is:

1 . A display panel, comprising a plurality of light emitting device groups, a plurality of light exiting part groups and a plurality of optical structure units,
wherein the plurality of light emitting device groups are on a first base substrate, each of the plurality of light emitting device groups comprises a plurality of light emitting devices, the plurality of light emitting devices comprise a first light emitting device and a second light emitting device, and the first light emitting device and the second light emitting device each are configured to emit light of a preset color; the plurality of light exiting part groups are on an emergent side of the light emitting device groups, and each of the plurality of light exiting part groups comprises a first color conversion part and a second color conversion part; and the plurality of optical structure units are between the plurality of light emitting device groups and the plurality of light exiting part groups, an orthographic projection of each of the plurality of optical structure units on the first base substrate covers an orthographic projection of at least one of the plurality of light emitting device groups on the first base substrate, each of the plurality of optical structure units is configured to direct light emitted by the first light emitting device to the first color conversion part and direct light emitted by the second light emitting device to the second color conversion part, the first color conversion part is configured to convert the light of the preset color into light of a first color, and the second color conversion part is configured to convert the light of the preset color into light of a second color, wherein an orthographic projection of the first light emitting device does not overlap an orthographic projection of the first color conversion part on the first base substrate; and/or an orthographic projection of the second light emitting device does not overlap an orthographic projection of the second color conversion part on the first base substrate.

2 . The display panel according to claim 1 , wherein the light of the first color is different from the light of the second color in wavelength range.

3 . The display panel according to claim 1 , wherein the plurality of light emitting devices in the light emitting device group further comprise a third light emitting device, each of the plurality of light exiting part groups further comprises a light transmission part, the orthographic projection of each of the plurality of optical structural units on the first base substrate further covers an orthographic projection of the third light emitting device on the first base substrate, and
each of the plurality of optical structure units is further configured to direct light emitted by the third light emitting device to the light transmission part.

4 . The display panel according to claim 1 , wherein the optical structure unit is a condensing lens, and an equivalent air thickness between an emergent surface of the light emitting device and an emergent surface of the optical structure unit is in a range of one to two times a focal length of the condensing lens.

5 . The display panel according to claim 4 , wherein the equivalent air thickness between the emergent surface of the optical structure unit and the emergent surface of the light emitting device is greater than or equal to a target thickness, and the target thickness H satisfies the following formula:

f
-

h
⁢
1

H

=

h
⁢
2

-
f

h
⁢
2

,

where h 1 is an arc height of the condensing lens, h 2 is an equivalent air thickness between the emergent surface of the condensing lens and an incident surface of the light exiting part, and f is a focal length of the condensing lens.

6 . The display panel according to claim 1 , wherein the light emitting device comprises a first electrode and a light emitting layer on a side of the first electrode away from the first base substrate, and
the display panel further comprises a pixel defining layer on the first base substrate, the pixel defining layer has a plurality of first accommodation grooves, the plurality of light emitting devices in a same light emitting device group are in a same first accommodation groove, different light emitting device groups are in different first accommodation grooves, respectively, and the first electrodes of the plurality of light emitting devices in the same first accommodation groove are spaced apart from each other.

7 . The display panel according to claim 1 , wherein the display panel further comprises:
an encapsulation layer, which is on a side of the plurality of light emitting device groups away from the first base substrate, and is configured to encapsulate the plurality of light emitting device groups; a first filling layer on a side of the encapsulation layer away from the first base substrate; and a second filling layer between the first filling layer and the plurality of light exiting part groups, wherein the optical structure unit is between the first filling layer and the second filling layer and is in contact with the first filling layer and the second filling layer, and a surface of the optical structure unit close to the second filling layer is a convex curved surface; and a refractive index of the first filling layer and a refractive index of the second filling layer are different from a refractive index of the optical structure unit.

8 . The display panel according to claim 7 , wherein the display panel further comprises a pixel defining layer between the encapsulation layer and the first base substrate, any two light emitting device groups adjacent to each other are separated from each other by the pixel defining layer,
the encapsulation layer comprises a first encapsulation sub-layer, a second encapsulation sub-layer and a third encapsulation sub-layer, which are sequentially arranged in a direction away from the first base substrate, wherein the plurality of light emitting devices in a same light emitting device group are arranged in a first direction, and a width W PDL of the pixel defining layer between the two light emitting device groups adjacent to each other and arranged in the first direction satisfies:
d 1 *sin θ 1 +d 2 *sin θ 2 +d 3 *sin θ3 +d 4 *sin θ 4 ≤W PDL /2,

where θ 1 is a maximum included angle between light incident into the first encapsulation sub-layer and a thickness direction of the display panel, θ 2 is a maximum included angle between light incident into the second encapsulation sub-layer and the thickness direction of the display panel, θ 3 is a maximum included angle between light incident into the third encapsulation sub-layer and the thickness direction of the display panel, θ 4 is a maximum included angle between light incident into the first filling layer and the thickness direction of the display panel; d 1 is a thickness of the first encapsulation sub-layer, d 2 is a thickness of the second encapsulation sub-

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Liu Yujie
• Yang Song
• Wu Qian
• Fang Zheng
• Shi Ge
• Sun Yanliu
• Han Jiahui
• Liang Pengxia
• Li Hongpeng

Classifications

• H10K59/122

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

• H10K59/879

  comprising refractive means, e.g. lenses · CPC title

• H10K2102/351

  Thickness · CPC title

• H10K50/858

  comprising refractive means, e.g. lenses · CPC title

• H10K59/38 Primary

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