Backlight module

• US 20050254261A1
• Filed: 11/15/2004
• Published: 11/17/2005
• Est. Priority Date: 05/12/2004
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lo, Chi-Chung, Chang, Che-Chih
• Granted Patent: US 7,241,041 B2
• Time in Patent Office: Days
• US Class Current: 362/633
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package

Abstract

A backlight module is provided. The backlight module includes a frame, a light source and at least an optical film. The optical film has a first side with a first positioning flange and a second positioning flange, a second side with a third positioning flange and a third side with a fourth positioning flange. The edges of the first positioning flange, the second positioning flange, the third positioning flange and the fourth positioning flange abut the edges of the frame to hold the optical film in the frame.

Claims

1. A backlight module, comprising:

a frame; and

an optical film having a first side with a first positioning flange and a second positioning flange, a second side with a third positioning flange and a third side with a fourth positioning flange, wherein the edges of the first positioning flange, the second positioning flange, the third positioning flange and the fourth positioning flange abut against edges of the frame to hold the optical film in the frame.

2. The backlight module according to claim 1, wherein the shape of one of the first positioning flange, the second positioning flange, the third positioning flange and the fourth positioning flange are a polygon.

3. The backlight module according to claim 1, wherein the shape of the optical film is substantially a quadrilateral.

4. The backlight module according to claim 3, wherein the first positioning flange, the second positioning flange, the third positioning flange and the fourth positioning flange are located at the four corners of the optical film.

5. The backlight module according to claim 1, wherein the edges of the frame have two positioning holes, and the first positioning flange and the second positioning flange are inserted into the two positioning holes correspondingly.

6. The backlight module according to claim 1, wherein the edges of the frame have two indentations, and the third positioning flange and the fourth positioning flange are embedded into the two indentations correspondingly.

7. The backlight module according to claim 1, wherein the extension direction of the first positioning flange is substantially the same as the extension direction of the second position flange.

8. The backlight module according to claim 1, wherein the extension direction of the third positioning flange and the extension direction of the fourth position flange are inversed.

9. A backlight frame structure, comprising:

an accommodating area configured to receive one or more optical film having a first side with a first positioning flange and a second positioning flange, a second side with a third positioning flange, and a third side with a fourth positioning flange; and

a plurality of frame edges for abutting against the edges of the first positioning flange, the second positioning flange, the third positioning flange and the fourth positioning flange to hold the optical film in the frame.

10. The backlight frame structure according to claim 9, wherein the frame edges have two positioning holes, and the first positioning flange and the second positioning flange are inserted into the two positioning holes correspondingly.

11. The backlight frame structure according to claim 9, wherein the frame edges have two indentations, and the third positioning flange and the fourth positioning flange are embedded into the two indentations correspondingly.

12. The backlight frame structure according to claim 9, wherein the extension direction of the first positioning flange is substantially the same as the extension direction of the second position flange.

13. The backlight frame structure according to claim 9, wherein the extension direction of the third positioning flange and the extension direction of the fourth position flange are inversed.