Display module, display device, and backlight module

Patent metadata

Field	Value
Publication number	US-12282216-B2
Application number	US-202118260510-A
Country	US
Kind code	B2
Filing date	Oct 29, 2021
Priority date	Oct 29, 2021
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

A display module, a display device, and a backlight module avoid bad image quality. The display module includes: a backlight module and a display panel, and the backlight module includes: a back plate, a first light source and a middle frame, wherein the back plate includes a bottom plate; the first light source is on the bottom plate; the middle frame is between the bottom plate and the display panel, a concave part is on a surface of the middle frame adjacent to the display panel, and a second light source is in the concave part, such that bad image quality of the edge shadow of the display module is effectively avoided by arranging the second light source in the concave part of the surface of the middle frame adjacent to the display panel.

First claim

What is claimed is:

1. A display module comprising:
a display panel; and
a backlight module including:
a back plate comprising a bottom plate;
a first light source disposed on the bottom plate;
a middle frame disposed between the bottom plate and the display panel; and
a surface of the middle frame adjacent to the display panel has an opening to form a groove structure, and a second light source is provided in the groove structure,
wherein at least one side surface of the groove structure is provided with a reflection film, and the reflective film is arranged between the second light source and an edge of the middle frame adjacent to the second light source.

2. The display module according to claim 1 , wherein the groove structure is in a middle region of the surface of the middle frame adjacent to the display panel.

3. The display module according to claim 2 , wherein the display panel and the surface of the middle frame adjacent to the display panel are bonded by a first adhesive, and the first adhesive covers at least a part of the second light source.

4. The display module according to claim 3 , wherein a size of the first adhesive in a direction parallel to a main surface of the bottom plate is larger than a size of the groove structure in the direction parallel to the main surface of the bottom plate.

5. The display module according to claim 3 , wherein the first adhesive covers an entire surface of the middle frame adjacent to the display panel.

6. The display module according to claim 1 , wherein the groove structure is at an edge position of the surface of the middle frame adjacent to the display panel on a side of the surface of the middle frame away from the first light source.

7. The display module according to claim 6 , wherein the display panel and the surface of the middle frame adjacent to the display panel are bonded by a first adhesive, and the first adhesive at least covers a peripheral region of the groove structure.

8. The display module according to claim 7 , wherein the first adhesive covers a region of the surface of the middle frame adjacent to the display panel except the groove structure.

9. The display module according to claim 6 , wherein the display panel comprises a liquid crystal cell and a diffusion plate, wherein the diffusion plate is at a side of the liquid crystal cell adjacent to the middle frame, and a light shielding part is at a side of the diffusion plate and the second light source away from the first light source.

10. The display module according to claim 9 , wherein the diffusion plate and the liquid crystal cell are bonded together by a second adhesive.

11. The display module according to claim 9 , wherein the light shielding part is connected to a side surface of the middle frame away from the first light source and connected to a side surface of the diffusion plate on a same side of the second light source.

12. The display module according to claim 1 , wherein the surface of the middle frame adjacent to the display panel has a chamfer on at least one side of the groove structure.

13. The display module according to claim 12 , wherein a side of the middle frame adjacent to the first light source has an arc-shaped surface protruding to a side of the first light source, and an optical film is on the arc-shaped surface, wherein the optical film is configured to guide light emitted by the first light source and irradiated on the optical film to the display panel.

14. The display module according to claim 1 , further comprising a flexible circuit board arranged at a side of the middle frame away from the first light source, wherein the flexible circuit board is connected to the second light source, and the flexible circuit board is configured to provide a turn-on voltage to the second light source.

15. The display module according to claim 14 , further comprising a printed circuit board and a connector, wherein the printed circuit board is configured to provide an integrated circuit to the flexible circuit board, and the connector is configured to connect the flexible circuit board to the printed circuit board.

16. The display module according to claim 15 , further comprising a printed circuit board protection layer on a side of the printed circuit board away from the first light source.

17. A display device, comprising a splicing screen constituted by a plurality of the display modules according to claim 1 .

18. The display device according to claim 17 , wherein adjacent display modules of the plurality of the display modules are spliced by a light shielding adhesive tape comprised in each of the display modules.

19. A backlight module, comprising:
a back plate including a bottom plate;
a first light source disposed on the bottom plate;
a middle frame disposed on the bottom plate, wherein the middle frame has a first surface and a second surface that are opposite to each other, and the first surface is in contact with the bottom plate; and
a surface of the middle frame adjacent to the display panel has an opening to form a groove structure, and a second light source is provided in the groove structure,
wherein at least one side surface of the groove structure is provided with a reflection film, and the reflective film is arranged between the second light source and an edge of the middle frame adjacent to the second light source.

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Xu Zhuang
• Sun Jixing
• Fu Changjia
• Li Dan
• Tian Zhaoshou
• Hou Shanlei
• Feng Hongbo

Classifications

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• G02F1/133602

  Direct backlight · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/133504

  Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606) · CPC title

• G02F1/13336 Primary

  Combining plural substrates to produce large-area displays, e.g. tiled displays · CPC title