Display panel, display apparatus, and light emitting substrate

Patent metadata

Field	Value
Publication number	US-2025098471-A1
Application number	US-202218572526-A
Country	US
Kind code	A1
Filing date	Dec 20, 2022
Priority date	Dec 20, 2022
Publication date	Mar 20, 2025
Grant date	—

Abstract

A display panel includes a first subpixel region configured to emit light of a first color, a second subpixel region configured to emit light of a second color, and a third subpixel region configured to emit light of a third color. The display panel includes a first light-emitting diode including a first light emitting layer, a second light emitting diode including a second light emitting layer, and a third light-emitting diode including a third light emitting layer. The second light emitting layer and the third light emitting layer are spaced apart from each other. At least a first portion of the first light emitting layer and the third light emitting layer are parts of a unitary layer continuously extending from the third subpixel region to at least a first portion of the first subpixel region. The third subpixel region is smaller than the second subpixel region.

First claim

1 . A display panel, comprising a first subpixel region configured to emit light of a first color, a second subpixel region configured to emit light of a second color, and a third subpixel region configured to emit light of a third color;
wherein the display panel comprises: a base substrate; and a first light-emitting diode, a second light emitting diode, and a third light-emitting diode on the base substrate; wherein the first light-emitting diode comprises a first light emitting layer; the second light emitting diode comprises a second light emitting layer; the third light-emitting diode comprises a third light emitting layer; the second light emitting layer and the third light emitting layer are spaced apart from each other; at least a first portion of the first light emitting layer and the third light emitting layer are parts of a unitary layer continuously extending from the third subpixel region to at least a first portion of the first subpixel region; an area of the third subpixel region is smaller than an area of the second subpixel region, and is smaller than an area of the first subpixel region; and the first color, the second color, and the third color are three different colors.

2 . The display panel of claim 1 , wherein at least a second portion of the first light emitting layer and the second light emitting layer are parts of a unitary layer continuously extending from the second subpixel region to at least a second portion of the first subpixel region.

3 . The display panel of claim 1 , wherein the light of the third color has a wavelength range smaller than a wavelength range of the light of the first color, and smaller than a wavelength range of the light of the second color.

4 . The display panel of claim 1 , further comprising a first emissive material layer;
wherein the first emissive material layer comprises the third light emitting layer and the first portion of the first light emitting layer; and the third light emitting layer and the first portion of the first light emitting layer have a same composition.

5 . The display panel of claim 4 , wherein the first emissive material layer comprises a stacked structure comprising multiple first emissive material sub-layers.

6 . The display panel of claim 5 , wherein at least two of the multiple first emissive material sub-layers are emissive material sub-layers of a same color.

7 . The display panel of claim 5 , wherein all of the multiple first emissive material sub-layers are emissive material sub-layers of a same color.

8 . The display panel of claim 5 , wherein at least two of the multiple first emissive material sub-layers are emissive material sub-layers of different colors.

9 . The display panel of claim 5 , wherein the multiple first emissive material sub-layers comprise an emissive material sub-layer of the first color and an emissive material sub-layer of the third color.

10 . The display panel of claim 1 , comprising a second emissive material layer;
wherein the second emissive material layer comprises the second light emitting layer and the second portion of the first light emitting layer; and the second light emitting layer and the second portion of the first light emitting layer have a same composition.

11 . The display panel of claim 10 , wherein the second emissive material layer comprising a stacked structure comprising multiple second emissive material sub-layers; and
at least two of the multiple second emissive material sub-layers are emissive material sub-layers of different colors.

12 . (canceled)

13 . The display panel of claim 4 , further comprising a second emissive material layer;
wherein the first emissive material layer comprises a stacked structure comprising one or more first emissive material sub-layers of a third color, the one or more first emissive material sub-layers being configured to emit light of the third color with a first peak wavelength; the second emissive material layer comprises a stacked structure comprising one or more second emissive material sub-layers of the third color, the one or more second emissive material sub-layers being configured to emit light of the third color with a second peak wavelength; the first peak wavelength and the second peak wavelength are in a wavelength range of blue light; and the first peak wavelength is different from the second peak wavelength.

14 . The display panel of claim 13 , wherein the first peak wavelength is in a range of 460 nm to 463 nm, and the second peak wavelength is in a range of 450 nm to 454 nm.

15 . The display panel of claim 4 , wherein the first emissive material layer comprises a stacked structure comprising one or more first emissive material sub-layers configured to emit light of the third color, and at least one emissive material sub-layer configured to emit light of the first color, the at least one emissive material sub-layer being on a side of the one or more first emissive material sub-layers away from the base substrate.

16 . The display panel of claim 10 , wherein the second emissive material layer comprises a stacked structure comprising one or more second emissive material sub-layers configured to emit light of the third color, and at least one emissive material sub-layer configured to emit light of the second color, the at least one emissive material sub-layer being on a side of the one or more second emissive material sub-layers away from the base substrate.

17 . The display panel of claim 1 , further comprising a color conversion layer and a light transmissive layer;
wherein the color conversion layer comprises a plurality of first color conversion blocks of a first color; the light transmissive layer comprises a plurality of light transmissive blocks configured to allow light to transmit through; an individual light transmissive block of the plurality of light transmissive blocks is at least partially in the third subpixel region; a first individual first color conversion block of the plurality of first color conversion blocks of the first color is at least partially in the first subpixel region; and light provided to at least a portion of the first subpixel region and to the third subpixel region are of a same color.

18 . The display panel of claim 17 , comprising a first emissive material layer;
wherein the first emissive material layer comprises the third light emitting layer and the first portion of the first light emitting layer; and the third light emitting layer and the first portion of the first light emitting layer have a same composition; wherein an orthographic projection of the first emissive material layer on the base substrate at least partially overlaps with an orthographic projection of the individual light transmissive block in the third subpixel region on the base substrate, and at least partially overlaps with an orthographic projection of the first individual first color conversion block in at least the portion of the first subpixel region on the base substrate; wherein the display panel further comprises a bank layer defining a plurality of apertures for receiving a plurality of color conversion blocks and the plurality of light transmissive blocks; and the orthographic projection of the first emissive material layer on the base substrate at least partially overlaps with an orthographic projection of a portion of the bank layer spacing apart the individual light transmissive block and the first individual first color conversion block on the base substrate.

19 . (canceled)

Assignees

• Boe Technology Group Co Ltd

Inventors

• Yan Guang
• Wang Linlin
• Bai Jinglu

Classifications

• H10K59/352

  the areas of the RGB subpixels being different · CPC title

• H10K59/771

  Integrated devices comprising a common active layer · CPC title

• H10K59/122

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

• H10K50/13

  comprising stacked EL layers within one EL unit · CPC title

• H10K59/38 Primary

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