Display apparatus with micro light emitting diode light board

Patent metadata

Field	Value
Publication number	US-11796859-B2
Application number	US-202217656766-A
Country	US
Kind code	B2
Filing date	Mar 28, 2022
Priority date	Mar 25, 2020
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A display apparatus, comprising a functional layer on the light emitting side of a light source and a diffusion plate. A support for the diffusion plate is arranged between the light source and the functional layer, a cushion portion is arranged between the support and the functional layer, and the cushion portion is in contact with the support and the functional layer. Pressure of the support on the functional layer is reduced by providing the cushion portion between the support and the functional layer.

First claim

What is claimed is:

1. A display apparatus, comprising:
a panel, configured to display an image;
a light source on an incident side of the panel, configured to provide backlight for the panel;
a diffusion plate on a light emitting side of the light source;
a functional layer on a side of the diffusion plate facing the light source;
a support between the light source and the functional layer and configured to support the diffusion plate; and
a cushion portion between the support and the functional layer and configured to contact the support and the functional layer so as to mitigate pressure of the support for the functional layer;
wherein the cushion portion is made of silica gel or epoxy resin;
the light source is a micro light emitting diode light board, and a height of the cushion portion and a height of the support meet a following relationship:
0.2≤( H 1+ H 2−Δ H )/ p≤ 0.8; wherein

H1 represents a height of the support, H2 represents an original height of the cushion portion, ΔH represents a deformation of the cushion portion, and p represents a distance between every two adjacent micro light emitting diodes in the micro light emitting diode light board.

2. The display apparatus according to claim 1 , wherein the cushion portion is on a surface of a side of the support facing the functional layer; or
the cushion portion is on a surface of a side of the functional layer facing the support.

3. The display apparatus according to claim 1 , wherein an area of a cross section of the cushion portion parallel to the functional layer is greater than an area of a cross section of the support parallel to the functional layer and close to the functional layer.

4. The display apparatus according to claim 3 , wherein the cushion portion is of a shape of a sphere, a hemisphere or an ellipsoid; and
the support is of a shape of a tetrahedron, a pyramid, a cone, a cuboid, a cube or a cylinder.

5. The display apparatus according to claim 1 , wherein the height of the support is smaller than 6 mm.

6. The display apparatus according to claim 1 , wherein the support is fixed to the micro light emitting diode light board through buckles, screws or adhesive.

7. The display apparatus according to claim 6 , wherein the support is fixed to the micro light emitting diode light board through a limiting sheet, an auxiliary column and a buckle.

8. The display apparatus according to claim 7 , wherein the limiting sheet and the buckle are at two ends of the auxiliary column respectively.

9. The display apparatus according to claim 1 , wherein the micro light emitting diode light board comprises:
a circuit board, configured to provide a driving signal;
at least one micro light emitting diodes on the circuit board in an array;
an packaging layer on a surface of a side of the micro light emitting diode away from the circuit board; and
a reflective sheet on a surface of a side of the circuit board facing the micro light emitting diode, wherein the reflective sheet is provided with openings for exposing the at least one micro light emitting diodes;
wherein the support is fixed at interval area among the at least one micro light emitting diodes.

10. The display apparatus according to claim 9 , wherein the packaging layer is configured to cover surfaces of the micro light emitting diodes as a whole layer; or
the packaging layer is configured to cover the surfaces of the micro light emitting diodes, and the packaging layer has individual dot patterns; or
the packaging layer covers micro light emitting diode rows or micro light emitting diode columns, and the packaging layer has individual strip-shaped patterns.

11. The display apparatus according to claim 1 , wherein a thickness of the diffusion plate is 1.5 mm to 3 mm.

12. The display apparatus according to claim 1 , wherein the diffusion plate has scattering particle materials inside.

13. The display apparatus according to claim 1 , wherein the functional layer is configured to reflect light rays with small incident angles emitted from the light source and transmit light rays with large incident angles emitted from the light source.

14. The display apparatus according to claim 1 , wherein the functional layer comprises film layers with different refraction indexes and arranged in a laminated mode.

15. The display apparatus according to claim 1 , wherein the support is distributed at interval area among the micro light emitting diodes.

16. The display apparatus according to claim 1 , further comprising: a group of films on a side of the diffusion plate away from the light source.

17. The display apparatus according to claim 16 , wherein the group of films comprises a quantum dot layer or a fluorescent layer.

18. The display apparatus according to claim 16 , wherein the group of films comprises a prism sheet.

Assignees

• Hisense Visual Tech Co Ltd

Inventors

• Zhang Nannan
• Li Fulin
• Li Jinlong
• Qiao Mingsheng
• Liu Xiaowei
• Li Xiao
• Zhai Yushuai

Classifications

• G02F1/133603 Primary

  with LEDs · CPC title

• G02F1/133605

  including specially adapted reflectors · CPC title

• G02F1/133607

  the light controlling member including light directing or refracting elements, e.g. prisms or lenses · CPC title

• G02F1/133608 Primary

  including particular frames or supporting means · CPC title

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title