Liquid crystal display and backlight module thereof

• US 10,634,838 B2
• Filed: 08/03/2017
• Issued: 04/28/2020
• Est. Priority Date: 06/30/2017
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Chen, Qian, Liu, Zhongjie, Han, Mei
• Primary Examiner(s): Glick, Edward J
• Assistant Examiner(s): Quash, Anthony G
• Application Number:
  US15/572,542
• Publication Number:
  US 20190004234A1
• Time in Patent Office: 999 Days
• Field of Search: None
• CPC Class Codes: G02B 6/0016 Grooves, prisms, gratings, scattering particles or rough surfaces
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses
• CPC Class Codes: G02B 6/0038 Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0065 Manufacturing aspects; Material aspects
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/009 of the light source in the package G02B6/0021 takes precedence

Abstract

The present disclosure provides a liquid crystal display and a backlight module which includes a reflective sheet, a light guide plate disposed on the reflective sheet, an optical assembly and a light source assembly, the light guide plate including a light guide portion and a support portion disposed to surround the light guide portion, and the optical assembly being located on a top of the light guide portion; and the light source assembly including a plurality of LEDs which are disposed between the support portion and the light guide portion and disposed to be opposite to an incident surface of the light guide portion. The light guide plate according to the present disclosure includes a light guide portion and a support portion disposed to surround the light guide portion, wherein the support portion is used to support the display module and fix the backlight module, thereby omitting a rubber frame.

Claims

1. A backlight module, comprising:

a reflective sheet;

a light guide plate disposed on the reflective sheet, and comprising a light guide portion and a support portion disposed to surround the light guide portion;

an optical assembly being located on a top of the light guide portion; and

a light source assembly comprising a plurality of LEDs which are disposed between the support portion and the light guide portion and disposed to be opposite to a light incident surface of the light guide portion,

wherein a plurality of embossments are continuously disposed to form a saw-tooth shape along an entire surface of the light guide portion that abuts the support portion, and a plurality of grooves which one-to-one correspond to the plurality of embossments are disposed on the support portion, and

wherein the plurality of embossments and the plurality of grooves prevent a line from forming at an interface between the support portion and the light guide portion.

2. The backlight module of claim 1, wherein a plurality of baffles are disposed at intervals on the light incident surface of the light guide portion, and are combined with the support portion to form a plurality of placement grooves into which the plurality of LEDs are accommodated.

3. The backlight module of claim 2, wherein the light source assembly further comprises a substrate disposed on a top of the plurality of LEDs, the substrate totally covering the plurality of placement grooves.

4. The backlight module of claim 3, wherein the substrate extends to a top of the support portion and is adhered to the top of the support portion.

5. The backlight module of claim 4, wherein the substrate extends to the top of the light guide portion and is adhered to the top of the light guide portion.

6. The backlight module of claim 1, wherein the support portion is made of an opaque material.

7. The backlight module of claim 6, wherein the support portion and the light guide portion are formed integratedly.

8. A liquid crystal display, comprising:

a display module; and

a backlight module, comprising;

a reflective sheet;

a light guide plate disposed on the reflective sheet, and comprising a light guide portion and a support portion disposed to surround the light guide portion;

an optical assembly being located on a top of the light guide portion; and

a light source assembly comprising a plurality of LEDs which are disposed between the support portion and the light guide portion and disposed to be opposite to a light incident surface of the light guide portion,

wherein a plurality of embossments are continuously disposed to form a saw-tooth shape along an entire surface of the light guide portion that abuts the support portion, and a plurality of grooves which one-to-one correspond to the plurality of embossments are disposed on the support portion,

wherein the plurality of embossments and the plurality of grooves prevent a line from forming at an interface between the support portion and the light guide portion, and

wherein the display module is disposed on the backlight module.

9. The liquid crystal display of claim 8, wherein a plurality of baffles are disposed at intervals on the light incident surface of the light guide portion, and are combined with the support portion to form a plurality of placement grooves into which the plurality of LEDs are accommodated.

10. The liquid crystal display of claim 9, wherein the light source assembly further comprises a substrate disposed on a top of the plurality of LEDs, the substrate totally covering the plurality of placement grooves.

11. The liquid crystal display of claim 10, wherein the substrate extends to a top of the support portion and is adhered to the top of the support portion.

12. The liquid crystal display of claim 11, wherein the substrate extends to the top of the light guide portion and is adhered to the top of the light guide portion.

13. The liquid crystal display of claim 8, wherein the support portion is made of an opaque material.

14. The liquid crystal display of claim 13, wherein the support portion and the light guide portion are formed integratedly.