Backlight module

• US 7,782,418 B2
• Filed: 03/05/2008
• Issued: 08/24/2010
• Est. Priority Date: 07/04/2007
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Chang, Shih-Chang, Yu, Li-Chuan, Hsu, Ying-Feng, Yang, Chi-Chun, Liu, Tzu-Yi, Ke, Therm-Hoo, Yen, Tung-I, Shao, Tung-Liang
• Primary Examiner(s): Kim; Richard H
• Application Number:
  US12/042,542
• Publication Number:
  US 20090009679A1
• Time in Patent Office: 902 Days
• Field of Search: 349/58, 362/632
• US Class Current: 349/58
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence

Abstract

A backlight module includes a frame, an optical element, a bottom plate, a holder, and a light source. The optical elements are located on the frame and a space between the sidewall of the frame and the optical elements. The bottom plate located under the optical elements. The light source is on the holder inserted into the space, The holder is inserted into the space along the direction toward the bottom surface of the bottom plate, and is removed from the space along the opposing direction.

Claims

1. A backlight module, comprising:

a frame comprising a first light-reflective coating layer;

an optical element located within the frame;

a bottom plate disposed under the optical element, and secured to the frame;

a holder disposed under the frame and the bottom plate and comprising a second light-reflective coating layer; and

a light source;

wherein the holder selectively engages or disengages with the frame along a direction that is perpendicular to a bottom surface of the bottom plate, when the holder engages with the frame, the first, second light-reflective coating layers and the optical element collectively define an accommodation space to enclose the light source.

2. The backlight module of claim 1, wherein the holder comprises an L-shaped cross-section.

3. The backlight module of claim 2, wherein the second light-reflective coating layer comprises an L-shaped cross-section.

4. The backlight module of claim 1, further comprising a reflective plate disposed between the optical element and the bottom plate.

5. A liquid crystal display, comprising:

a frame comprising a first light-reflective coating layer;

a liquid crystal display panel disposed in the frame;

an optical element located within the frame, and disposed under the liquid crystal display panel;

a bottom plate disposed under the optical elements, and secured to the frame;

a holder disposed within the frame and the bottom edge of the bottom plate, wherein the holder comprises a second light-reflective coating layer; and

a light source for illuminating the liquid crystal display panel;

wherein the holder selectively engages or disengages with the backlight module along a direction that is perpendicular to a bottom surface of the bottom plate, when the holder engages with the backlight module, the first, second light-reflective coating layers and the optical element collectively define an accommodation space to enclose the light source.

6. The liquid crystal display of claim 5, wherein the holder comprises an L-shaped cross-section.

7. The liquid crystal display of claim 6, wherein the second light-reflective coating layer comprises an L-shaped cross-section.

8. The liquid crystal display of claim 5, further comprising a reflective plate disposed between the optical element and the bottom plate.