Liquid crystal display and backlight module thereof

Patent metadata

Field	Value
Publication number	US-9817181-B2
Application number	US-201514784270-A
Country	US
Kind code	B2
Filing date	Sep 21, 2015
Priority date	Aug 21, 2015
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

The present invention proposes a backlight module includes an LCD and a backlight module. A QD film adheres to a light guide plate. An optical film is arranged on the QD film. A light source is arranged at a lateral side of the light guide plate. A bezel accommodates the light guide plate and the light source. The bezel includes a base board and a sideboard extending along a direction perpendicular to the base board. The lateral frame encloses the bezel. The lateral frame includes a standing board and a horizontal extensive object. The standing board adheres to an outer side of the sideboard. The horizontal extensive object presses the QD film on the LGP and separates the optical film from the QD film, which prevents the edges of the QD film from getting distorted easily and having blue circles.

First claim

What is claimed is:

1. A backlight module, comprising:
a light guide plate (LGP);
a quantum dot (QD) film, adhering to the LGP;
an optical film, arranged on the QD film;
a light source, arranged at a lateral side of the LGP;
a bezel, accommodating the LGP and the light source, the bezel comprising a base board and a sideboard, and the sideboard extending along a direction perpendicular to the base board;
a lateral frame, enclosing the bezel, the lateral frame comprising a standing board and a horizontal extensive object, and the standing board adhering to an outer side of the sideboard;
a support bar, for fixing the light source, an emitting plane of the LGP being as horizontal as a top of the support bar and a top of the sideboard for supporting the QD film;
the horizontal extensive object comprising:
a first extension portion, a bottom of the first extension portion jointing the top of the sideboard;
a second extension portion, arranged on the first extension portion, and the second extension portion and the top of the sideboard forming a slot for clipping lateral sides of the QD film based on a gap of the first extension portion;
a third extension portion, arranged on the second extension portion, an extensive length of the third extension portion being smaller than an extensive length of the second extension portion for forming a shape of stairs and for supporting a lateral side of the optical film; wherein,
the horizontal extensive object presses the QD film on the LGP and separates the optical film from the QD film.

2. The backlight module of claim 1 , wherein the first extension portion comprises:
a holding face, holding the top of the sideboard;
a confronting face, connected to the holding face for forming downward stairs.

3. The backlight module of claim 2 , wherein the second extension portion comprises:
a pressing face, presses the QD film;
a supporting surface, supporting the optical film, and being arranged with the pressing face with a certain distance for separating the QD film and the optical film, wherein
the top of the sideboard, the holding face, and the pressing face are connected successively for forming the slot for fixing the lateral sides of the QD film.

4. The backlight module of claim 1 , wherein a plurality of second extension portions are used and disposed at intervals for holding the QD film discretely.

5. The backlight module of claim 1 , wherein the horizontal extensive object further comprises a plurality of protrusions disposed on a bottom of the second extension portion at intervals for holding the QD film discretely.

6. The backlight module of claim 5 , wherein the protrusion is a hemisphere-like or cone-like protrusion.

7. The backlight module of claim 5 , wherein the protrusion adheres to the second extension portion.

8. The backlight module of claim 1 , further comprising a sealed black glue coating ends of the QD film and arranged in the slot.

9. The backlight module of claim 1 , wherein the bezel further comprises a support arranged on the base board for supporting the LGP.

10. The backlight module of claim 1 , wherein the optical film comprises a diffusion sheet and a prism sheet layered successively.

11. A backlight module, comprising:
a light guide plate (LGP);
a quantum dot (QD) film, adhering to the LGP;
an optical film, arranged on the QD film;
a light source, arranged at a lateral side of the LGP;
a bezel, accommodating the LGP and the light source, the bezel comprising a base board and a sideboard, and the sideboard extending along a direction perpendicular to the base board;
a lateral frame, enclosing the bezel, the lateral frame comprising a standing board and a horizontal extensive object, and the standing board adhering to an outer side of the sideboard;
wherein the horizontal extensive object presses the QD film on the LGP and separates the optical film from the QD film,
wherein the horizontal extensive object comprises:
a first extension portion, a bottom of the first extension portion jointing the top of the sideboard;
a second extension portion, arranged on the first extension portion, and the second extension portion and the top of the sideboard forming a slot for clipping lateral sides of the QD film based on a gap of the first extension portion; and
a third extension portion, arranged on the second extension portion, an extensive length of the third extension portion being smaller than an extensive length of the second extension portion for forming a shape of stairs and for supporting a lateral side of the optical film.

12. The backlight module of claim 11 , wherein a plurality of second extension portions are used and disposed at intervals for holding the QD film discretely.

13. The backlight module of claim 11 , wherein the horizontal extensive object further comprises a plurality of protrusions disposed on a bottom of the second extension portion at intervals for holding the QD film discretely.

14. The backlight module of claim 13 , wherein the protrusion is a hemisphere-like or cone-like protrusion.

15. The backlight module of claim 13 , wherein the protrusion adheres to the second extension portion.

16. The backlight module of claim 11 , further comprising a sealed black glue coating ends of the QD film and arranged in the slot.

17. The backlight module of claim 11 , wherein the bezel further comprises a support arranged on the base board for supporting the LGP.

18. The backlight module of claim 11 , wherein the bezel further comprises a support bar, for fixing the light source, an emitting plane of the LGP being as horizontal as a top of the support bar and a top of the sideboard.

19. A liquid crystal display comprising the backlight module as claimed in claim 11 .

Assignees

• Shenzhen China Star Optoelect
• Shenzhen China Star Optoelect

Inventors

• Fan Yong

Classifications

• G02F1/133617

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• G02B6/0051

  Diffusing sheet or layer · CPC title

• G02F1/133608 Primary

  including particular frames or supporting means · CPC title

• G02B6/0091 Primary

  of the light source relative to the light guide (G02B6/0021 takes precedence) · CPC title

• G02B6/0026

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