Edge-lit backlight module and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10353244-B2
Application number	US-201815890291-A
Country	US
Kind code	B2
Filing date	Feb 6, 2018
Priority date	Jun 13, 2017
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

This present disclosure relates to the field of display technologies and provides an edge-lit backlight module and a liquid crystal display device. The edge-lit backlight module of the present disclosure includes a light source, a light guide panel and a reflector. The light source is arranged on a light entering side of the light guide panel, and the reflector is arranged below the light guide panel, a bottom surface of the light guide panel faces towards the reflector, and a plurality of dots are arranged on the bottom surface at intervals. The reflector is bonded on the bottom surface of the light guide panel through a glue layer, and the glue layer is provided with light transmission holes at positions of the dots.

First claim

What is claimed is:

1. A liquid crystal display device, comprising: a light source, a light guide panel and a reflector, wherein the light source is arranged on a light entering side of the light guide panel, and the reflector is arranged below the light guide panel, wherein:
a bottom of the light guide panel faces towards the reflector, and at least a first dot and a second dot are arranged on the bottom at intervals, the first dot being configured to guide a first light incident on the reflector from the light guide panel and the second dot being configured to guide a second light incident on the reflector from the light guide panel, and the reflector being configured to reflect the first light and the second light back to the light guide panel;
a glue layer is provided between the first dot and the second dot, and is configured to bound the reflector and the bottom of the light guide panel together; and
wherein there is no glue layer between the first dot and the reflector, and an interface where the glue layer is attached with the bottom of the light guide panel is configured to reflect a third light traveling in the light guide panel.

2. The liquid crystal display device according to claim 1 , the first dot and the second dot are composed by mixing titanium dioxide (TiO2) and silicon dioxide (SiO2) crystals with resins.

3. The liquid crystal display device according to claim 1 , the first dot and the second dot are larger in size when located farther away from the light source.

4. The liquid crystal display device according to claim 1 , the glue layer is printed on the bottom surface of the light guide panel by way of screen printing.

5. The liquid crystal display device according to claim 1 , the glue layer is coated on the bottom of the light guide panel by way of coating.

6. The liquid crystal display device module according to claim 1 , the first dot and the second dot are transparent or sim-transparent, and there are scattering particles in the first dot and the second dot.

7. The liquid crystal display device according to claim 1 , the glue layer is arranged around at least one of the first dot and the second dot, and a light transmission hole is formed by the glue layer at a position of at least one of the first dot and the second dot.

8. The liquid crystal display device according to claim 7 , sizes of the light transmission holes are larger than a size of the first dot or a size of the second dot.

9. The liquid crystal display device according to claim 7 , the sizes of the light transmission holes are predetermined, so that both at least a part of light passing through the dots and exiting to the reflector and at least a part of light reflected by the reflector and re-entering into the light guide panel pass through the light transmission holes.

10. The liquid crystal display device according to claim 7 , the light transmission holes are holes in the glue layer.

11. The liquid crystal display device according to claim 1 , there is a gap between the first dot and the reflector.

12. The liquid crystal display device according to claim 11 , sizes of the light transmission holes are larger than a size of the first dot or a size of the second dot.

13. The liquid crystal display device according to claim 11 , the sizes of the light transmission holes are predetermined, so that both at least a part of light passing through the dots and exiting to the reflector and at least a part of light reflected by the reflector and re-entering into the light guide panel pass through the light transmission holes.

14. A liquid crystal display device, comprising: a liquid crystal panel and an edge-lit backlight module, and the edge-lit backlight module is configured to illuminate the liquid crystal panel;
the edge-lit backlight module comprises a light source, a light guide panel and a reflector, wherein the light source is arranged on a light entering side of the light guide panel, and the reflector is arranged below the light guide panel,
a bottom of the light guide panel faces towards the reflector, and at least a first dot and a second dot are arranged on the bottom at intervals, the first dot being configured to guide a first light incident on the reflector from the light guide panel and the second dot being configured to guide a second light incident on the reflector from the light guide panel;
the reflector being configured to reflect the first light and the second light back to the light guide panel;
a glue layer is provided between the first dot and the second dot, and is configured to bound the reflector and the bottom of the light guide panel together; and
wherein there is no glue layer between the first dot and the reflector, and an interface where the glue layer is attached with the bottom of the light guide panel is configured to reflect a third light traveling in the light guide panel.

15. The liquid crystal display device according to claim 14 , the edge-lit backlight module further comprises a middle frame which is provided with a supporting portion and a base, the supporting portion extends away from the base, the liquid crystal panel is provided above the supporting portion, and the light guide panel and the reflector are provided below the supporting portion.

16. The liquid crystal display device according to claim 15 , the light source is arranged on the base and facing a light entering surface of the light guide panel.

17. The liquid crystal display device according to claim 14 , the first dot and the second dot are transparent or sim-transparent, and there are scattering particles in the first dot and the second dot.

18. The liquid crystal display device according to claim 14 , the light transmission holes are holes in the glue layer.

19. The liquid crystal display device according to claim 14 , the glue layer is arranged around at least one of the first dot and the second dot, and a light transmission hole is formed by the glue layer at a position of at least one of the first dot and the second dot.

Assignees

• Qingdao Hisense Electronics Co Ltd
• Hisense Int Co Ltd
• Hisense Usa Corp

Inventors

• Ou Kejian
• Zhang Dengyin
• Wen Xiping
• Xu Yao

Classifications

• G02B6/0036

  2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title

• G02B6/0058

  varying in density, size, shape or depth along the light guide · CPC title

• G02F1/133615 Primary

  Edge-illuminating devices, i.e. illuminating from the side · CPC title

• G02F1/133608

  including particular frames or supporting means · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title