Backlight module and liquid crystal display

Patent metadata

Field	Value
Publication number	US-2018106959-A1
Application number	US-201615307266-A
Country	US
Kind code	A1
Filing date	May 23, 2016
Priority date	Mar 3, 2016
Publication date	Apr 19, 2018
Grant date	—

Abstract

A backlight module and a liquid crystal display are provided. In the backlight module, a reflection sheet and a first optical film set are designed as an up-down engaged box structure, wherein the other elements of the backlight module are fixed inside the box, so as to form the whole of the backlight module. The backlight module has advantages: narrow frame, simple structure, low cost, high light utilization efficiency. The liquid crystal display has advantages such as a narrow frame.

First claim

What is claimed is:

1 . A liquid crystal display, comprising a backlight module, wherein the backlight module, comprises: an LED light source, a flexible print circuit, a light guide plate, an optical film set, and a reflection sheet, wherein the optical film set includes a first optical film set and a second optical film set;
wherein the reflection sheet is composed of a bottom surface and four laterals, and the bottom surface and four of the laterals are folded as a box; the LED light source is disposed on the bottom surface of the reflection sheet, and three laterals, which are non-light-output sides, of the LED light source contact with three of the laterals of the reflection sheet, respectively; the light guide plate is disposed on the bottom surface of the reflection sheet, and a light-input side of the light guide plate corresponds to a light-output sides of the LED light source, and three non-light-output side surfaces of the light guide plate contact with three of the laterals of the reflection sheet; the flexible print circuit is disposed above the LED light source, and adhered and fixed with an inner surface of the first optical film set by a double-sided tape; the second optical film set is disposed on a light-output side of the light guide plate, and three side surfaces of the second optical film set which do not correspond to the flexible print circuit contact with three of the laterals of the reflection sheet; and the first optical film set is composed of a top surface and four laterals, wherein the top surface of the first optical film set is disposed on the flexible print circuit and the second optical film set, and inner surfaces of four of the laterals of the first optical film set are adhered and fixed with outer surfaces of the laterals of the reflection sheet by double-sided tapes.

2 . The liquid crystal display according to claim 1 , wherein an optical film in the first optical film set is a first prism sheet; and the second optical film set include a second prism sheet and a diffusion sheet, and the diffusion sheet is disposed between the second prism sheet and the light guide plate.

3 . The liquid crystal display according to claim 1 , wherein in the second optical film set, the number of optical films is two.

4 . The liquid crystal display according to claim 1 , wherein the flexible print circuit includes an outer interface, which is led out through an opening on the laterals of the first optical film set.

5 . A backlight module, comprising: an LED light source, a flexible print circuit, a light guide plate, an optical film set, and a reflection sheet, wherein the optical film set includes a first optical film set and a second optical film set;
wherein the reflection sheet is composed of a bottom surface and four laterals, and the bottom surface and four of the laterals are folded as a box; the LED light source is disposed on the bottom surface of the reflection sheet, and three laterals, which are non-light-output sides, of the LED light source contact with three of the laterals of the reflection sheet, respectively; the light guide plate is disposed on the bottom surface of the reflection sheet, and a light-input side of the light guide plate corresponds to a light-output sides of the LED light source, and three non-light-output side surfaces of the light guide plate contact with three of the laterals of the reflection sheet; the flexible print circuit is disposed above the LED light source, and attached and fixed with an inner surface of the first optical film set; the second optical film set is disposed on a light-output side of the light guide plate, and three side surfaces of the second optical film set which do not correspond to the flexible print circuit contact with three of the laterals of the reflection sheet; and the first optical film set is composed of a top surface and four laterals, wherein the top surface of the first optical film set is disposed on the flexible print circuit and the second optical film set, and inner surfaces of four of the laterals of the first optical film set are attached and fixed with outer surfaces of the laterals of the reflection sheet.

6 . The backlight module according to claim 5 , wherein methods of attaching and fixing include adopting a double-sided tape and a hot-melt adhesive.

7 . The backlight module according to claim 5 , wherein an optical film in the first optical film set is a first prism sheet.

8 . The backlight module according to claim 5 , wherein in the second optical film set, the number of optical films is two.

9 . The backlight module according to claim 5 , wherein the second optical film set include a second prism sheet and a diffusion sheet, and the diffusion sheet is disposed between the second prism sheet and the light guide plate.

10 . The backlight module according to claim 5 , wherein the flexible print circuit includes an outer interface, which is led out through an opening on the laterals of the first optical film set.

11 . A liquid crystal display, comprising a backlight module, wherein the backlight module comprises: an LED light source, a flexible print circuit, a light guide plate, an optical film set, and a reflection sheet, wherein the optical film set includes a first optical film set and a second optical film set;
wherein the reflection sheet is composed of a bottom surface and four laterals, and the bottom surface and four of the laterals are folded as a box; the LED light source is disposed on the bottom surface of the reflection sheet, and three laterals, which are non-light-output sides, of the LED light source contact with three of the laterals of the reflection sheet, respectively; the light guide plate is disposed on the bottom surface of the reflection sheet, and a light-input side of the light guide plate corresponds to a light-output sides of the LED light source, and three non-light-output side surfaces of the light guide plate contact with three of the laterals of the reflection sheet; the flexible print circuit is disposed above the LED light source, and attached and fixed with an inner surface of the first optical film set; the second optical film set is disposed on a light-output side of the light guide plate, and three side surfaces of the second optical film set which do not correspond to the flexible print circuit contact with three of the laterals of the reflection sheet; and the first optical film set is composed of a top surface and four laterals, wherein the top surface of the first optical film set is disposed on the flexible print circuit and the second optical film set, and inner surfaces of four of the laterals of the first optical film set are attached and fixed with outer surfaces of the laterals of the reflection sheet.

12 . The liquid crystal display according to claim 11 , wherein an optical film in the first optical film set is a first prism sheet; and the second optical film set include a second prism sheet and a diffusion sheet, and the diffusion sheet is disposed between the second prism sheet and the light guide plate.

13 . The liquid crystal display according to claim 11 , wherein in the second optical film set, the number of optical films is two.

14 . The liquid crystal display according to claim 11 , wherein the flexible print circuit includes an outer interface, which is led out through an opening on the laterals of the first optical film set.

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Zeng Jie

Classifications

• G02B6/0073

  Light emitting diode [LED] · CPC title

• G02B6/0051

  Diffusing sheet or layer · CPC title

• G02B6/0053

  Prismatic sheet or layer; Brightness enhancement element, sheet or layer · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title

• G02B6/009

  of the light source in the package (G02B6/0021 takes precedence) · CPC title