Display panel, method for manufacturing display panel and display device

Patent metadata

Field	Value
Publication number	US-12581839-B2
Application number	US-202218028802-A
Country	US
Kind code	B2
Filing date	May 31, 2022
Priority date	May 31, 2022
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

Abstract

The present disclosure provides a display panel, including: a driving backplane; a light-emitting unit layer located on a side of the driving backplane and comprising at least one light-emitting pixel unit; a metasurface composite structure layer located on a light-exiting side of the light-emitting pixel unit and including at least two metasurface micro-lens structure layers, which are sequentially arranged in a direction away from the light-emitting pixel unit and are independent of each other, where the metasurface micro-lens structure layers are configured to modulate a phase of light incident thereinto so as to converge the light. Embodiments of the present disclosure further provide a method for manufacturing a display panel and a display device.

First claim

What is claimed is:

1 . A display panel, comprising:
a driving backplane; a light-emitting unit layer located on a side of the driving backplane and comprising at least one light-emitting pixel unit; a metasurface composite structure layer located on a light-exiting side of the light-emitting pixel unit and comprising at least two metasurface micro-lens structure layers, which are sequentially arranged in a direction away from the light-emitting pixel unit and are independent of each other, wherein the metasurface micro-lens structure layers are configured to modulate a phase of light incident thereinto so as to converge the light, and wherein a transparent spacer layer is formed between adjacent metasurface micro-lens structure layers, and wherein the transparent spacer layer is in contact with the metasurface micro-lens structure layers closest thereto at both sides thereof; and a refractive index of the transparent spacer layer is less than that of each of the metasurface micro-lens structure layers in contact therewith.

2 . The display panel of claim 1 , wherein a packaging cover plate is provided at a side of the metasurface composite structure layer away from the driving backplane.

3 . The display panel of claim 1 , wherein the metasurface micro-lens structure comprises a plurality of micro-pillars having a same height; and
a ratio of the height of each micro-pillar to an equivalent diameter of a cross-section of the micro-pillar parallel to the driving backplane is less than or equal to 5:1.

4 . The display panel of claim 3 , wherein a number of phase orders of the micro-pillars of the metasurface micro-lens structure in each metasurface micro-lens structure layer ranges from 4 to 8.

5 . The display panel of claim 3 , wherein numbers of phase orders of the metasurface micro-lens structures in the metasurface micro-lens structure layers are the same;
numbers of the micro-pillars in the metasurface micro-lens structures in the metasurface micro-lens structure layers are the same; the micro-pillars in the metasurface micro-lens structures in the metasurface micro-lens structure layers are arranged in a same manner.

6 . The display panel of claim 3 , wherein a cross-section of each micro-pillar parallel to the driving backplane is circular or square.

7 . The display panel of claim 1 , wherein a distance between any two adjacent metasurface micro-lens structure layers in a direction perpendicular to the driving backplane ranges from 0.8 μm to 1.2 μm.

8 . The display panel of claim 1 , wherein a number of the metasurface micro-lens structure layers in the metasurface composite structure layer is two.

9 . The display panel of claim 1 , wherein an encapsulation layer is provided between the light-emitting unit layer and the metasurface composite structure layer.

10 . A display device, comprising the display panel of claim 1 .

11 . A method of manufacturing the display panel of claim 1 , comprising:
providing a driving backplane; forming a light-emitting unit layer on the driving backplane, the light-emitting unit layer comprising at least one light-emitting pixel unit; forming a metasurface composite structure layer on a light-exiting side of the light-emitting pixel unit, wherein the metasurface composite structure layer comprises at least two metasurface micro-lens structure layers, which are sequentially arranged in a direction away from the light-emitting pixel unit and are independent of each other, and the metasurface micro-lens structure layers are configured to modulate a phase of light incident thereinto so as to converge the light, and forming a transparent spacer layer between adjacent metasurface micro-lens structure layers, wherein the forming the metasurface composite structure layer on the light-exiting side of the light-emitting pixel unit comprises: alternately forming the metasurface micro-lens structure layer and a transparent spacer layer on the light-exiting side of the light-emitting pixel unit.

12 . The method of claim 11 , wherein a pakaging cover plate is provided on a side of the metasurface composite structure layer away from the driving backplane; the at least two metasurface micro-lens structure layers comprise: a first metasurface micro-lens structure layer and a second metasurface micro-lens structure layer; a supporting structure is provided between the packaging cover plate and the driving backplane, the supporting structure being configured to support the packaging cover plate and the driving backplane; and the first metasurface micro-lens structure layer is fixed to the driving backplane, and the second metasurface micro-lens structure layer is fixed to the packaging cover plate; and wherein
the forming the metasurface composite structure layer on the light-exiting side of the light-emitting pixel unit comprises:
forming a first metasurface micro-lens structure layer on a side of the light-emitting unit layer away from the driving backplane;
forming a second metasurface micro-lens structure layer on a side of the packaging cover plate close to the driving backplane; and
forming a supporting structure between the driving backplane and the packaging cover plate, and aligning and fixing the driving backplane with the packaging cover plate.

13 . A display panel, comprising:
a driving backplane; a light-emitting unit layer located on a side of the driving backplane and comprising at least one light-emitting pixel unit;
a metasurface composite structure layer located on a light-exiting side of the light-emitting pixel unit and comprising at least two metasurface micro-lens structure layers, which are sequentially arranged in a direction away from the light-emitting pixel unit and are independent of each other, wherein the metasurface micro-lens structure layers are configured to modulate a phase of light incident thereinto so as to converge the light, wherein
a packaging cover plate is provided on a side of the metasurface composite structure layer away from the driving backplane;
the at least two metasurface micro-lens structure layers comprise: a first metasurface micro-lens structure layer and a second metasurface micro-lens structure layer;
a supporting structure is provided between the packaging cover plate and the driving backplane, the supporting structure being configured to support the packaging cover plate and the driving backplane; and
the first metasurface micro-lens structure layer is fixed to the driving backplane, and the second metasurface micro-lens structure layer is fixed to the packaging cover plate.

14 . The display panel of claim 13 , wherein the supporting structure is located in at least one of an edge region of the driving backplane or a region between adjacent light-emitting pixel units.

15 . A display panel, comprising:
a driving backplane; a light-emitting unit layer located on a side of the driving backplane and comprising at least one light-emitting pixel unit;
a metasurface composite structure layer located on a light-exiting side of the light-emitting pixel unit and comprising at least two metasurface micro-lens structure layers, which are sequentially arranged in a direction away from the light-emitting pixel unit and are independent of each other, wherein the metasurface micro-lens structure layers are configured to modulate a phase of light incident thereinto so as to converge the light, wherein
each metasurface micro-lens structure layer comprises at least one metasurface micro-lens structure corresponding to the light-emitting pixel unit one by one, with the metasurface micro-

Assignees

• Boe Technology Group Co Ltd

Inventors

• Peng Weiting
• Wu Qian
• Cheng Fang
• Ling Qiuyu
• Wang Wei
• Liang Pengxia

Classifications

• H10K59/873 Primary

  Encapsulations · CPC title

• H10K2102/351

  Thickness · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/879 Primary

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

• H10H29/10

  Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00 (active-matrix LED displays H10H29/30) · CPC title