Liquid crystal devices (LCDS) and the backlight modules thereof

Patent metadata

Field	Value
Publication number	US-10012867-B2
Application number	US-201514893930-A
Country	US
Kind code	B2
Filing date	Apr 16, 2015
Priority date	Apr 1, 2015
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A liquid crystal device and the backlight module thereof are disclosed. The backlight module includes a back plate, at least one optical film, a plurality of optical fibers, and a reflector. The optical fibers are arranged to configure at least one light bar of the backlight module. The optical film and the back plate are spaced apart and opposite to each other to define a chamber for the light beams to be transmitted. The optical fibers positioned by the reflector are located at one lateral side of the chamber such that each of the optical fibers and the back plate form a predetermined inclined angle. In addition, the reflector is arranged at light-emitting locations of the optical fibers so as to adjust an emitting angle of the light beams entering the chamber. The back plate reflects the light beams irradiated on the back plate back to the optical film. The uniformity of the transmitted and mixed light beams is guaranteed when the backlight module is adopted in large-scale LCD.

First claim

What is claimed is:

1. A backlight module, comprising:
a back plate, at least one optical film, a plurality of optical fibers, a reflector, and at least one positioning component attached to the reflector,
wherein the reflector is securely attached to the back plate,
the positioning component comprising a plurality of press-fit holes with each of the optical fibers passing through one of the corresponding press-fit holes, and
the optical fibers being secured by the positioning component, arranged along the same direction, and spaced apart from each other to configure at least one light bar of the backlight module;

wherein light beams from lighting devices and sunlight can be transmitted by the optical fibers,
the optical film and the back plate being spaced apart and opposite to each other to define a chamber for the light beams to be transmitted, and
the back plate comprising a recessed and arc surface facing toward the optical film, and reflecting the light beams irradiated on the back plate back to the optical film;

and
wherein the optical fibers are positioned by the reflector and arranged at one lateral side of the chamber such that each of the optical fibers and the back plate form a predetermined inclined angle along a horizontal direction, and the reflector is arranged at light-emitting locations of the optical fibers so as to adjust an emitting angle of the light beams entering the chamber.

2. The backlight module as claimed in claim 1 , wherein the back plate comprises a reflective sheet arranged on a surface facing toward the optical film.

3. The backlight module as claimed in claim 1 , wherein the reflector is of a U-shaped or V-shaped structure, the optical fibers are arranged within a bottom of the U-shaped or the V-shaped structure, and an opening of the U-shaped reflector is the light-emitting location of the optical fibers.

4. The backlight module as claimed in claim 3 , wherein each of the optical fibers and the horizontal direction of the back plate forms the predetermined inclined angle equaling to 27 degrees.

5. A backlight module, comprising:
a back plate, at least one optical film, a plurality of optical fibers, and a reflector,
the optical fibers being arranged along the same direction and spaced apart from each other to configure at least one light bar of the backlight module,
the optical film and the back plate being spaced apart and opposite to each other to define a chamber for light beams to be transmitted, and
the back plate comprising a recessed and arc surface facing toward the optical film, and reflecting the light beams irradiated on the back plate back to the optical film;

wherein the optical fibers are positioned by the reflector and arranged at one lateral side of the chamber such that each of the optical fibers and the back plate form a predetermined inclined angle along a horizontal direction, and the reflector is arranged at light-emitting locations of the optical fibers so as to adjust an emitting angle of the light beams entering the chamber.

6. The backlight module as claimed in claim 5 , wherein the light beams transmitted by the optical fibers comprises the light beams from lighting devices and sunlight.

7. The backlight module as claimed in claim 5 , wherein the back plate comprises a recessed and arc surface facing toward the optical film.

8. The backlight module as claimed in claim 7 , wherein the back plate comprises a reflective sheet arranged on a surface facing toward the optical film.

9. The backlight module as claimed in claim 5 , wherein the surface of the back plate facing toward the optical film is parallel to the optical film.

10. The backlight module as claimed in claim 5 , wherein the reflector is of a U-shaped or V-shaped structure, the optical fibers are arranged within a bottom of the U-shaped or the V-shaped structure, and an opening of the U-shaped reflector is the light-emitting location of the optical fibers.

11. The backlight module as claimed in claim 10 , wherein each of the optical fibers and the horizontal direction of the back plate forms the predetermined inclined angle equaling to 27 degrees.

12. The backlight module as claimed in claim 5 , wherein the backlight module further comprises at least one positioning component attached to the reflector, and
wherein the reflector is securely attached to the back plate,
the positioning component comprising a plurality of press-fit holes with each of the optical fibers passing through one of the corresponding press-fit holes, and
the optical fibers being secured by the positioning component.

13. A liquid crystal device (LCD), comprising a display panel and the backlight module, and the display panel is arranged on the backlight module, wherein the backlight module comprises:
a back plate, at least one optical film, a plurality of optical fibers, a reflector, and at least one positioning component attached to the reflector,
wherein the reflector is securely attached to the back plate,
the positioning component comprising a plurality of press-fit holes with each of the optical fibers passing through one of the corresponding press-fit holes, and
the optical fibers being secured by the positioning component, and arranged along the same direction and spaced apart from each other to configure at least one light bar of the backlight module;

wherein light beams from lighting devices and sunlight can be transmitted by the optical fibers,
the optical film and the back plate being spaced apart and opposite to each other to define a chamber for the light beams to be transmitted, and
the back plate comprising a recessed and arc surface facing toward the optical film, and reflecting the light beams irradiated on the back plate back to the optical film;

and
wherein the optical fibers are positioned by the reflector and arranged at one lateral side of the chamber such that each of the optical fibers and the back plate form a predetermined inclined angle along a horizontal direction, and the reflector is arranged at light-emitting locations of the optical fibers so as to adjust an emitting angle of the light beams entering the chamber.

14. The LCD as claimed in claim 13 , wherein the LCD further comprises a front frame compressing the display panel on the reflector.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Chang Jianyu

Classifications

• G02F1/133602 Primary

  Direct backlight · CPC title

• G02F2001/3505

  Physics · mapped topic

• G02F2001/13332

  Physics · mapped topic

• G02F1/133524

  Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides · CPC title

• G02F1/133553

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title