Light-emitting module, display module and display device

Patent metadata

Field	Value
Publication number	US-11901496-B2
Application number	US-202117471184-A
Country	US
Kind code	B2
Filing date	Sep 10, 2021
Priority date	Jan 25, 2021
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A light-emitting module, a display module and a display device are provided. The light-emitting module includes multiple light-emitting elements, a micro lens array disposed on a light-emitting side of the multiple light-emitting elements, and a low-refractive material layer disposed on a side of the micro lens array away from the multiple light-emitting elements, wherein a refractive index of the low-refractive material layer is smaller than a refractive index of the micro lens array; light emitted by the light-emitting element may be processed by the micro lens array and the low-refractive material layer to form a dot matrix light source which irradiates multiple preset opening regions which are disposed at intervals.

First claim

What is claimed is:

1. A light-emitting module, comprising:
a plurality of light-emitting elements, a micro lens array disposed on a light-emitting side of the plurality of light-emitting elements, and a low-refractive material layer disposed on a side of the micro lens array away from the light-emitting elements,
wherein a refractive index of the low-refractive material layer is smaller than a refractive index of the micro lens array; and
light emitted by the light-emitting elements is processed by the micro lens array and the low-refractive material layer to form a dot matrix light source which irradiates a plurality of preset opening regions disposed at intervals.

2. The light-emitting module of claim 1 , wherein a refractive index of the low-refractive material layer is 1.2 to 1.4, and/or a refractive index of the micro lens array is 1.492 to 1.6.

3. The light-emitting module of claim 1 , wherein a thickness of the low-refractive material layer is greater than or equal to a maximum thickness of micro lenses in the micro lens array in a thickness direction of the light-emitting module, and smaller than an image distance of the micro lenses in the micro lens array.

4. The light-emitting module of claim 1 , wherein the micro lens array comprises a plurality of micro lenses disposed in a row direction and a column direction, wherein a distance between adjacent light-emitting elements in the row direction is larger than a distance between adjacent micro lenses in the row direction, and/or a distance between adjacent light-emitting elements in the column direction is larger than a distance between adjacent micro lenses in the column direction.

5. The light-emitting module of claim 4 , wherein the distance between the adjacent light-emitting elements in the row direction is a first integer multiple of the distance between the adjacent micro lenses in the row direction; and
the distance between the adjacent light-emitting elements in the column direction is a first integer multiple of the distance between the adjacent micro lenses in the column direction.

6. The light-emitting module of claim 5 , wherein the first integer is any one integer ranging from 2 to 20.

7. The light-emitting module of claim 1 , further comprising a first substrate and a second substrate, wherein
the first substrate is disposed on a side of the micro lens array close to the plurality of light-emitting elements, and a refractive index of the first substrate is larger than the refractive index of the low-refractive material layer; and
the second substrate is disposed on a side of the low-refractive material layer away from the plurality of light-emitting elements, and a refractive index of the second substrate is greater than the refractive index of the low-refractive material layer.

8. The light-emitting module of claim 7 , wherein
an object distance of micro lenses in the micro lens array is a thickness of the first substrate;
an image distance of the micro lenses in the micro lens array is a thickness of the second substrate; and
the thickness of the first substrate is greater than the thickness of the second substrate.

9. The light-emitting module of claim 8 , wherein the thickness of the first substrate is 0.5 mm and/or the thickness of the second substrate is 0.016 mm to 0.4 mm.

10. The light-emitting module of claim 1 , wherein the micro lens array is made of any one of polymethyl methacrylate and cycloolefin copolymer.

11. The light-emitting module of claim 1 , wherein a surface of a micro lens in the micro lens array away from the light-emitting elements is a curved surface convex towards a direction away from the light-emitting elements, wherein the curved surface is a part of a spherical surface.

12. The light-emitting module of claim 10 , wherein structural parameters of the micro lens array comprise:
one or more of a diameter of a single micro lens being 5.08 μm to 127 μm, a curvature radius of a single micro lens being 0.0028 mm to 0.064 mm, and an arch height of a single micro lens being 0.0016 mm to 0.064 mm.

13. A display module, comprising a light-emitting module and a display panel on a light-emitting side of the light-emitting module, wherein,
the light-emitting module comprises a plurality of light-emitting elements, a micro lens array disposed on a light-emitting side of the plurality of light-emitting elements, and a low-refractive material layer disposed on a side of the micro lens array away from the plurality of light-emitting elements, wherein a refractive index of the low-refractive material layer is smaller than a refractive index of the micro lens array; and after being processed by the micro lens array and the low-refractive material layer, light emitted by the light-emitting elements forms a dot matrix light source which irradiates a plurality of preset opening regions which are disposed at intervals;
the display panel comprises a plurality of pixel opening regions and opaque regions disposed between adjacent pixel opening regions; and
the plurality of preset opening regions are disposed in correspondence with the plurality of pixel opening regions.

14. The display module of claim 13 , wherein an orthographic projection region of the plurality of preset opening regions in a thickness direction of the display panel at least partially overlaps with an orthographic projection region of the plurality of pixel opening regions in the thickness direction of the display panel.

15. The display module of claim 13 , wherein the micro lens array comprises a plurality of micro lenses disposed in a row direction and a column direction, wherein,
a distance between adjacent light-emitting elements in the row direction is larger than a distance between adjacent pixel opening regions in the row direction, and/or a distance between adjacent light-emitting elements in the column direction is larger than a distance between adjacent pixel opening regions in the column direction.

16. The display module of claim 15 , wherein,
the distance between the adjacent light-emitting elements in the row direction is a second integer multiple of the distance between the adjacent pixel opening regions in the row direction; and
the distance between the adjacent light-emitting elements in the column direction is the second integer multiple of the distance between the adjacent pixel opening regions in the column direction.

17. The display module of claim 16 , wherein the second integer is any one integer ranging from 2 to 20.

18. The display module of claim 13 , wherein a distance between light-emitting surfaces of the plurality of light-emitting elements and a light incident surface of the display panel is 0.5 mm to 1.5 mm in a thickness direction of the display module.

19. A display device, comprising a display module, the display module comprising a light-emitting module and a display panel on a light-emitting side of the light-emitting module, wherein,
the light-emitting module comprises a plurality of light-emitting elements, a micro lens array disposed on a light-emitting side of the plurality of light-emitting elements, and a low-refractive material layer disposed on a side of the micro lens array away from the plurality of light-emitting elements, wherein a refractive index of the low-refractive material layer is smaller than a refractive index of the micro lens array; and after being processed by the micro lens array and the low-refractive material layer, light emitted by the light-emitting elements forms a dot matrix light source which irradiates a plura

Assignees

• Boe Technology Group Co Ltd

Inventors

• Ling Qiuyu
• Meng Xianqin
• Wang Wei
• Peng Weiting
• Guo Yujiao
• Tian Yishan
• Chen Xiaochuan

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H29/142

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10H20/855 Primary

  Optical field-shaping means, e.g. lenses · CPC title

• H01L33/58 Primary

  Electricity · mapped topic

• H01L27/156

  Electricity · mapped topic