Optical module, manufacturing method, and display device

Patent metadata

Field	Value
Publication number	US-12265236-B2
Application number	US-202117637667-A
Country	US
Kind code	B2
Filing date	Apr 26, 2021
Priority date	Apr 26, 2021
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

The present disclosure relates to the field of display technology, and provides an optical module, a manufacturing method thereof, and a display device. The optical module includes: a substrate; a black matrix arranged on the substrate and a plurality of optical lenses spaced apart from each other, wherein an orthogonal projection of a gap between adjacent optical lenses onto the substrate is located within an orthogonal projection of the black matrix onto the substrate, and the black matrix is made of a ferrous metal oxide.

First claim

What is claimed is:

1. An optical module, comprising:
a substrate; and
a black matrix arranged on the substrate and a plurality of optical lenses spaced apart from each other,
wherein an orthogonal projection of a gap between adjacent optical lenses onto the substrate is located within an orthogonal projection of the black matrix onto the substrate, and the black matrix is made of molybdenum oxide;
the optical module further comprises an etch stop layer arranged on a side of the optical lens away from the substrate and covering the optical lens, wherein the black matrix is arranged on a side of the etch stop layer away from the substrate.

2. The optical module according to claim 1 , further comprising a planarization layer arranged on a side of the black matrix and the optical lens away from the substrate, and having a refractive index less than the optical lens.

3. The optical module according to claim 2 , wherein a difference between the refractive index of the planarization layer and the refractive index of the optical lenses is greater than 0.1.

4. The optical module according to claim 2 , wherein the planarization layer has a thickness of 5 μm to 30 μm.

5. The optical module according to claim 1 , wherein the etch stop layer has a thickness of 10 nm to 100 nm.

6. The optical module according to claim 1 , wherein the optical lens has a diameter of 10 μm to 300 μm and a height of 5 μm to 30 μm, and a spacing between adjacent optical lenses is 1.5 μm to 5 μm.

7. The optical module according to claim 1 , wherein a thickness of the black matrix is less than 500 nm.

8. A display device comprising the optical module according to claim 1 .

9. The display device according to claim 8 , further comprising a display panel arranged opposite to the optical module to form a cell, wherein pixels of the display panel correspond to the optical lenses respectively, and an orthogonal projection of a center point of each pixel onto the substrate coincides with an orthogonal projection of a center point of a corresponding optical lens onto the substrate.

10. The optical module according to claim 2 , wherein the optical lens has a diameter of 10 μm to 300 μm and a height of 5 μm to 30 μm, and a spacing between adjacent optical lenses is 1.5 μm to 5 μm.

11. The optical module according to claim 3 , wherein the optical lens has a diameter of 10 μm to 300 μm and a height of 5 μm to 30 μm, and a spacing between adjacent optical lenses is 1.5 μm to 5 μm.

12. The optical module according to claim 4 , wherein the optical lens has a diameter of 10 μm to 300 μm and a height of 5 μm to 30 μm, and a spacing between adjacent optical lenses is 1.5 μm to 5 μm.

13. The optical module according to claim 5 , wherein the optical lens has a diameter of 10 μm to 300 μm and a height of 5 μm to 30 μm, and a spacing between adjacent optical lenses is 1.5 μm to 5 μm.

14. A method for manufacturing an optical module, comprising:
providing a substrate;
forming a plurality of optical lenses spaced apart from each other on the substrate; and
forming a black matrix on the substrate using molybdenum oxide,
wherein an orthogonal projection of a gap between adjacent optical lenses onto the substrate is located within an orthogonal projection of the black matrix onto the substrate;
wherein subsequent to forming the optical lenses, the method further comprises: forming an etch stop layer covering the optical lenses, wherein the forming the black matrix includes forming a molybdenum oxide layer on the etch stop layer through sputtering, and etching the molybdenum oxide layer to form the black matrix.

15. The method according to claim 14 , wherein the molybdenum oxide layer is etched through dry-etching.

16. The method according to claim 14 , further comprising forming a planarization layer covering the black matrix and the optical lenses, wherein the planarization layer has a refractive index less than the optical lens.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Guo Kang
• Zhang Feng
• Huang Haitao
• Gu Renquan
• Song Mengya
• Li Duohui
• Liu Song
• Gu Xin
• Yuan Guangcai
• Dong Xue

Classifications

• G02B27/18

  for optical projection, e.g. combination of mirror and condenser and objective {(photographic, cine and overhead projectors G03B21/00; photographic projection printing G03B27/32; photolithographic projectors G03F7/20; projection television H04N5/74; colour projection television H04N9/31)} · CPC title

• G02B27/026 Primary

  and a display device, e.g. CRT, LCD, for adding markings or signs or to enhance the contrast of the viewed object · CPC title

• G02B7/021

  for more than one lens · CPC title

• G02B3/005

  arranged along a single direction only, e.g. lenticular sheets (G02B3/0043 takes precedence) · CPC title

• G02B5/003 Primary

  Light absorbing elements · CPC title