Display panel and display apparatus

Patent metadata

Field	Value
Publication number	US-12342706-B2
Application number	US-202117780304-A
Country	US
Kind code	B2
Filing date	Jun 16, 2021
Priority date	Jun 16, 2021
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A display panel includes: a plurality of light-emitting devices on a substrate, wherein each light-emitting device is configured to emit light of a preset color; a color conversion layer including a plurality of light exiting parts, wherein each light exiting part corresponds to one light-emitting device, and the light exiting part is configured to receive light emitted by the corresponding light-emitting device and emit light of a color same as or different from the preset color; and an optical layer between the color conversion layer and the plurality of light-emitting devices, wherein the optical layer is configured to transmit at least a portion of the light of the preset color and reflect the light of a color different from the preset color emitted by the color conversion layer; wherein second electrodes corresponding to at least two light exiting parts, which emits light of different colors, have different reflectivities.

First claim

What is claimed is:

1. A display panel, comprising:
a plurality of light-emitting devices on a substrate, wherein each of the plurality of light-emitting devices is configured to emit light of a preset color; the light-emitting device includes a first electrode, a second electrode and a light-emitting functional layer, the first electrode and the second electrode are opposite to each other, the light-emitting functional layer is between the second electrode and the first electrode, and the first electrode is a reflective electrode;
a color conversion layer comprising a plurality of light exiting parts, wherein each of the plurality of light exiting part corresponds to one of the plurality of light-emitting devices, the light exiting part is on a side of the second electrode away from the light-emitting functional layer, and the light exiting part is configured to receive the light emitted by the corresponding light-emitting device and emit light of a color same as or different from the preset color; and
an optical layer between the color conversion layer and the plurality of light-emitting devices, wherein the optical layer is configured to transmit at least a portion of the light of the preset color and reflect the light of a color different from the preset color emitted by the color conversion layer;
wherein the second electrodes corresponding to at least two light exiting parts, which emit light of different colors, have different reflectivities,
wherein the optical layer comprises a plurality of first optical sub-layers and a plurality of second optical sub-layers, which are alternately stacked, and a refractivity of each of the plurality of first optical sub-layers is less than a refractivity of each of the plurality of second optical sub- layers,
wherein the display panel further comprises:
a first encapsulation layer between the plurality of light-emitting devices and the optical layer; and
a second encapsulation layer between the first encapsulation layer and the optical layer;
wherein the first encapsulation layer is made of an inorganic material, and the second encapsulation layer is made of an organic material; the optical layer is directly adjacent to the second encapsulation layer, an orthographic projection of each of the plurality of first optical sub-layers and the plurality of second optical sub-layers on the substrate covers an orthographic projection of the plurality of light-emitting devices on the substrate, and the first encapsulation layer, the second encapsulation layer and the optical layer form an encapsulation structure to encapsulate the plurality of light-emitting devices.

2. The display panel according to claim 1 , wherein the plurality of light exiting parts of the color conversion layer comprise a red light exiting part for emitting red light, a green light exiting part for emitting green light and a blue light exiting part for emitting blue light; and
a reflectivity of the second electrode corresponding to the red light exiting part and a reflectivity of the second electrode corresponding to the green light exiting part are both greater than a reflectivity of the second electrode corresponding to the blue light exiting part.

3. The display panel according to claim 2 , wherein the reflectivity of the second electrode corresponding to the red light exiting part is greater than the reflectivity of the second electrode corresponding to the green light exiting part.

4. The display panel according to claim 2 , wherein the reflectivity of the second electrode corresponding to the red light exiting part is in a range of 65% to 70%;
the reflectivity of the second electrode corresponding to the green light exiting part is in a range of 60% to 70%; and
the reflectivity of the second electrode corresponding to the blue light exiting part is in a range of 50% to 60%.

5. The display panel according to claim 4 , wherein a material of the second electrode of each of the plurality of light-emitting devices comprises silver and magnesium, a thickness of the second electrode corresponding to the red light exiting part is in a range of 15 nm to 20 nm, a thickness of the second electrode corresponding to the green light exiting part is in a range of 12 nm to 20 nm, and a thickness of the second electrode corresponding to the blue light exiting part is in a range of 10 nm to 15 nm.

6. The display panel according to claim 1 , wherein the preset color is blue.

7. The display panel according to claim 1 , wherein the refractivity of the first optical sub-layer is in a range of 1.45 to 1.50, and the refractivity of the second optical sub-layer is in a range of 1.85 to 1.95.

8. The display panel according to claim 7 , wherein a material of the first optical sub-layer comprises an oxide of silicon, and a material of the second optical sub-layer comprising a nitride of silicon.

9. The display panel according to claim 1 , wherein the first optical sub-layer has a thickness in a range of 80 nm to 100 nm, and the second optical sub-layer has a thickness in a range of 700 nm to 800 nm.

10. The display panel according to claim 1 , wherein among the plurality of first optical sub-layers and the plurality of second optical sub-layers of the optical layer, one of the plurality of second optical sub-layers is closest to the color conversion layer.

11. The display panel according to claim 1 , wherein the optical layer comprises at least four of the first optical sub-layers and at least five of the second optical sub-layers.

12. The display panel according to claim 1 , wherein the second encapsulation layer is in contact with one of the plurality of second optical sub-layers of the optical layer, and a refractivity of the second encapsulation layer is less than a refractivity of the second optical sub-layer in contact with the second encapsulation layer.

13. The display panel according to claim 1 , further comprising:
a light extraction layer between the second electrode of each of the plurality of light-emitting devices and the first encapsulation layer, and in contact with the second electrode; wherein the light extraction layer is configured to transmit the light emitted by the light-emitting device; and
a protective layer between the first encapsulation layer and the light extraction layer.

14. The display panel according to claim 1 , wherein a material of at least a part of the plurality of light exiting parts comprises a quantum dot material, and the display panel further comprises a third encapsulation layer, which is on a side of the color conversion layer away from the optical layer.

15. The display panel according to claim 1 , further comprising:
an accommodating structure layer on a side of the optical layer away from the light-emitting device, wherein the accommodating structure layer has a plurality of accommodating grooves, and the plurality of light exiting parts are arranged in the plurality of accommodating grooves in a one-to-one correspondence manner.

16. The display panel according to claim 1 , further comprising:
a color filter layer on a side of the color conversion layer away from the optical layer, wherein the color filter layer comprises a plurality of color filter parts, the plurality of color filter parts are in a one-to-one correspondence with the plurality of light exiting parts, and a color of each of the plurality of color filter parts is the same as the color of the light emitted by the corresponding light exiting part; and
a black matrix on a side of the color conversion layer away from the light-emitting device, wherein an orthographic projection of at least a pa

Assignees

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

Inventors

• Zeng Cheng
• Lee Jaeho
• Sun Zhen
• Ma Lulin

Classifications

• H10K50/858

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

• H10K50/856

  comprising reflective means · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/8792

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

• H10K59/80518

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title