A Diffusion Plate and Backlight Module Using the Same

• US 20070230210A1
• Filed: 07/27/2006
• Published: 10/04/2007
• Est. Priority Date: 03/30/2006
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Wu, Chih-Kang, Tsai, Chia-Chang, Shih, Chin-Ting
• Granted Patent: US 7,824,050 B2
• Time in Patent Office: Days
• US Class Current: 362/600
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means

Abstract

A diffusion plate and a backlight module for use in a liquid crystal display panel are provided. The backlight module includes a housing, a reflection plate, a light source, a diffusion plate and films. The diffusion plate has a plate body, a first supporter, and a second supporter. The plate body has a light exit surface. The first supporter and the second supporter are respectively disposed on two sides of the plate body and extend outwardly from the light exit surface. The films are disposed on the plate body and between the first and second supporters. The first and second supporters contact and support the liquid crystal display panel.

Claims

1. A diffusion plate for use in a backlight module, comprising a plate body having a first supporter and a second supporter, wherein the first supporter extends from a first edge of the plate body, and the second supporter extends from a second edge opposite to the first edge of the plate body.

2. The diffusion plate of claim 1, wherein the first supporter and the second supporter are symmetrical with respect to the plate body.

3. The diffusion plate of claim 1, wherein the first supporter includes a plurality of discontinuous supporter units.

4. The diffusion plate of claim 1, wherein the first supporter has a retaining portion substantially perpendicular to the plate body.

5. The diffusion plate of claim 1, wherein the first supporter has a cushion portion formed thereon.

6. The diffusion plate of claim 1, wherein the first supporter has a film positioning portion inwardly extending therefrom.

7. The diffusion plate of claim 6, wherein the first supporter is inwardly bended to form the film positioning portion.

8. The diffusion plate of claim 1, wherein the plate body further has a third supporter and a fourth supporter, wherein the third supporter extends from a third edge of the plate body, and the fourth supporter extends from a fourth edge opposite to the third edge of the plate body.

9. The diffusion plate of claim 8 wherein the third supporter and the fourth supporter are symmetrical with respect to the plate body.

10. A backlight module, comprising:

a housing;

a light source disposed within the housing;

a diffusion plate disposed over the light source and connected to the housing, the diffusion plate comprising a plate body having a first supporter and a second supporter, wherein the first supporter extends from a first edge of the plate body, and the second supporter extends from a second edge opposite to the first edge of the plate body; and

a film disposed on the diffusion plate and located between the first supporter and the second supporter.

11. The backlight module of claim 10, wherein the first supporter and the second supporter are symmetrical with respect to the plate body.

12. The backlight module of claim 10, wherein the first supporter includes a plurality of discontinuous supporter units.

13. The backlight module of claim 10, wherein the first supporter has a retaining portion substantially perpendicular to the plate body.

14. The backlight module of claim 10, wherein the first supporter outwardly extends to form a housing connecter, the housing connecter is coupled to a top surface of the housing.

16. The backlight module of claim 10, wherein the first supporter has a cushion portion formed thereon.

17. The backlight module of claim 10, wherein the first supporter has a film positioning portion inwardly extending therefrom.

18. The backlight module of claim 17, wherein the first supporter is inwardly bended to form the film positioning portion.

19. The backlight module of claim 10, wherein the plate body further has a third supporter and a fourth supporter, wherein the third supporter extends from a third edge of the plate body, and the fourth supporter extends from a fourth edge opposite to the third edge of the plate body.

20. The backlight module of claim 19, wherein the third supporter and the fourth supporter are symmetrical with respect to the plate body.

15. The backlight module of claim 25, wherein the housing connecter includes a bending portion connecting to an outer wall of the housing.