Backlight module and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9341763-B1
Application number	US-201414420374-A
Country	US
Kind code	B1
Filing date	Nov 19, 2014
Priority date	Nov 14, 2014
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

The present invention discloses a backlight module, which includes: a backplane, which has a sidewall; a light guide plate, which is carried on the backplane and includes a light incidence end section, a light exit surface, and a bottom surface opposite to the light exit surface; a light source, which is mounted on the sidewall and adjacent to the light incidence end section; an intermediate frame, which is set on and covers the light guide plate and the light source; a first retention slot, which is formed in the light incidence end section and has an opening facing the intermediate frame; a second retention slot, which is formed in the light incidence end section and close to the first retention slot and has an opening facing the backplane; a first quantum dot strip, which is received in the first retention slot; and a second quantum dot strip, which is received in the second retention slot. The present invention also discloses a liquid crystal display device. The present invention provides an arrangement including quantum dot strips arranged in the light incidence end section in a top-down staggering manner, where the manner of fixing is simple and light emitting from the light source is prevented from directly entering the light guide plate so as to improve the taste of the color of the backlighting.

First claim

What is claimed is:

1. A backlight module, comprising:
a backplane, which comprises a sidewall;
a light guide plate, which is carried on the backplane and comprises a light incidence end section, a light exit surface, and a bottom surface opposite to the light exit surface;
a light source, which is mounted on the sidewall and is adjacent to the light incidence end section;
an intermediate frame, which is set on and covers the light guide plate and the light source;
a first retention slot, which is formed in the light incidence end section and has an opening facing the intermediate frame;
a second retention slot, which is formed in the light incidence end section and close to the first retention slot and has an opening facing the backplane;
a first quantum dot strip, which is received in the first retention slot; and
a second quantum dot strip, which is received in the second retention slot.

2. The backlight module as claimed in claim 1 , wherein the first retention slot and the second retention slot are arranged to be parallel to each other.

3. The backlight module as claimed in claim 1 , wherein the first retention slot has an end contacting an inner end of a bottom of the first retention slot and the first retention slot has an opposite end that is flush with the light exit surface.

4. The backlight module as claimed in claim 1 , wherein the second retention slot has an end contacting an inner end of a top of the second retention slot and the second retention slot has an opposite end that is flush with the bottom surface.

5. The backlight module as claimed in claim 1 further comprising a first reflection layer, wherein the first reflection film layer is arranged on a side of the intermediate frame that faces the backplane, the first reflection film layer having an end positioned against the sidewall, the first reflection film layer having an opposite end located between the intermediate frame and the light guide plate.

6. The backlight module as claimed in claim 1 further comprising a second reflection layer, wherein the second reflection film layer is arranged on a side of the backplane that faces the intermediate frame, the second reflection film layer having an end positioned against the sidewall.

7. The backlight module as claimed in claim 5 further comprising a light absorption layer, wherein the light absorption layer is arranged between the intermediate frame and the light guide plate and the light absorption layer has an end positioned against the opposite end of the first reflection film layer.

8. The backlight module as claimed in claim 1 , wherein the backplane comprises a plurality of raised blocks formed on a side thereof that faces the light guide plate, wherein the light guide plate is positioned on the raised blocks.

9. The backlight module as claimed in claim 6 further comprising a reflector plate, wherein the reflector plate is arranged between the light guide and backplane and the reflector has an end positioned against an opposite end of the second reflection film layer.

10. The backlight module as claimed in claim 1 further comprising a reflector plate, wherein the reflector plate is arranged between the light guide plate and the backplane.

11. A liquid crystal display device, comprising a backlight module and a liquid crystal display panel that are arranged to oppose each other, the backlight module supplying displaying light to the liquid crystal display panel to allow the liquid crystal display panel to display images, wherein the backlight module comprises:
a backplane, which comprises a sidewall;
a light guide plate, which is carried on the backplane and comprises a light incidence end section, a light exit surface, and a bottom surface opposite to the light exit surface;
a light source, which is mounted on the sidewall and is adjacent to the light incidence end section;
an intermediate frame, which is set on and covers the light guide plate and the light source;
a first retention slot, which is formed in the light incidence end section and has an opening facing the intermediate frame;
a second retention slot, which is formed in the light incidence end section and close to the first retention slot and has an opening facing the backplane;
a first quantum dot strip, which is received in the first retention slot; and
a second quantum dot strip, which is received in the second retention slot.

12. The liquid crystal display device as claimed in claim 11 , wherein the first retention slot and the second retention slot are arranged to be parallel to each other.

13. The liquid crystal display device as claimed in claim 11 , wherein the first retention slot has an end contacting an inner end of a bottom of the first retention slot and the first retention slot has an opposite end that is flush with the light exit surface.

14. The liquid crystal display device as claimed in claim 11 , wherein the second retention slot has an end contacting an inner end of a top of the second retention slot and the second retention slot has an opposite end that is flush with the bottom surface.

15. The liquid crystal display device as claimed in claim 11 further comprising a first reflection layer, wherein the first reflection film layer is arranged on a side of the intermediate frame that faces the backplane, the first reflection film layer having an end positioned against the sidewall, the first reflection film layer having an opposite end located between the intermediate frame and the light guide plate.

16. The liquid crystal display device as claimed in claim 11 further comprising a second reflection layer, wherein the second reflection film layer is arranged on a side of the backplane that faces the intermediate frame, the second reflection film layer having an end positioned against the sidewall.

17. The liquid crystal display device as claimed in claim 15 further comprising a light absorption layer, wherein the light absorption layer is arranged between the intermediate frame and the light guide plate and the light absorption layer has an end positioned against the opposite end of the first reflection film layer.

18. The liquid crystal display device as claimed in claim 11 , wherein the backplane comprises a plurality of raised blocks formed on a side thereof that faces the light guide plate, wherein the light guide plate is positioned on the raised blocks.

19. The liquid crystal display device as claimed in claim 16 further comprising a reflector plate, wherein the reflector plate is arranged between the light guide and backplane and the reflector has an end positioned against an opposite end of the second reflection film layer.

20. The liquid crystal display device as claimed in claim 11 further comprising a reflector plate, wherein the reflector plate is arranged between the light guide plate and the backplane.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Fan Yong

Classifications

• G02B6/0073

  Light emitting diode [LED] · CPC title

• F21K9/56

  Mechanical Engineering · mapped topic

• G02B6/0031 Primary

  Reflecting element, sheet or layer · CPC title

• G02B6/0026

  Wavelength selective element, sheet or layer, e.g. filter or grating · CPC title

• G02B6/0023

  provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source · CPC title