Frame, backlight module and liquid crystal display module and method of fabricating the frame thereof

• US 8,823,894 B2
• Filed: 12/17/2010
• Issued: 09/02/2014
• Est. Priority Date: 10/19/2010
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Chang, Chih-Wei, Hsu, Po-Chun, Hsieh, Kun-Hung
• Primary Examiner(s): Won, Bumsuk
• Assistant Examiner(s): CHANG, CHARLES S
• Application Number:
  US12/970,967
• Publication Number:
  US 20120092593A1
• Time in Patent Office: 1,355 Days
• Field of Search: 349 58- 67, 362600-634
• US Class Current: 349/58
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02B 6/009 of the light source in the package G02B6/0021 takes precedence

Abstract

A frame formed by cutting and bending a plate base is provided. The maximum thickness of the frame is T, the thickness of the plate base is t, and 1.5t≦T≦2.5t. The frame includes a first plate element, a second plate element, and a bending portion. The second plate element is directly contacted to the first plate element, and the first plate element is substantially parallel to the second plate element. The bending portion is connected between the first plate element and the second plate element. A backlight module using the above-mentioned frame and a liquid crystal display (LCD) module using the backlight module are also provided.

Claims

1. A frame formed by cutting and bending a plate base, a maximum thickness of the frame being T, a thickness of the plate base being t, 1.5t≦

T≦

2.5t, the frame comprising;

a first plate element having a first alignment notch;

a second plate element having a second alignment notch and directly contacted to and overlapped with the first plate element, the first plate element being substantially parallel and attached to the second plate element with the first alignment notch exposing a portion of the second plate element while the second alignment notch exposing a portion of the first plate element, wherein the first alignment notch and the second alignment notch are mutually misaligned; and

a bending portion connected between the first plate element and the second plate element.

2. The frame as claimed in claim 1, wherein a material of the plate base comprises a metallic material or an alloy.

3. The frame as claimed in claim 1, wherein a Young'"'"'s modulus of the plate base is substantially greater than or equal to 10⁴ MPa.

4. The frame as claimed in claim 1, wherein 0.3 mm≦

t≦

5.0 mm.

5. The frame as claimed in claim 1, wherein 0.45 mm≦

T≦

12.5 mm.

6. The frame as claimed in claim 1, wherein the first plate element has a first through hole, and the second plate element has a second through hole corresponding to the first through hole.

7. A backlight module comprising:

a back plate;

at least one frame as claimed in claim 1 disposed on the back plate, and the first plate element being directly contacted to the back plate and located between the second plate element and the back plate;

a light guide plate configured on the back plate and having a light-incident side surface and a first alignment portion fixed into the first alignment notch;

an optical film set configured above the light guide plate and having a third alignment portion fixed into the second alignment notch; and

a light bar configured on the back plate and located between the first plate element and the light-incident side surface of the light guide plate.

8. The backlight module as claimed in claim 7, the light bar comprising:

a circuit board having a second alignment portion fixed into the first alignment notch; and

a plurality of light emitting diode devices configured on the circuit board.

9. The backlight module as claimed in claim 7, wherein the first plate element has a first through hole, and the second plate element has a second through hole corresponding to the first through hole.

10. The backlight module as claimed in claim 9, wherein the back plate has a locking hole corresponding to the first through hole and the second through hole.

11. The backlight module as claimed in claim 10, further comprising a locking element penetrating the first through hole and the second through hole and being locked into the locking hole.

12. The backlight module as claimed in claim 7, further comprising a reflector configured below the light guide plate.

13. A liquid crystal display module comprising:

the backlight module as claimed in claim 7;

a liquid crystal display panel configured on the frame and located above the light guide plate; and

a front bezel assembled to the back plate to cover the frame and a portion of the liquid crystal display panel.

14. A method of fabricating a frame, comprising:

providing a plate base comprising a first portion element and a second portion element at opposite sides defined by a bending line;

cutting the first portion element to form a plurality of predetermined openings, wherein portions of the openings are symmetrical to each other along the bending line while the others are not;

bending a plate base along the bending line, and the openings not symmetrical to each other along to the bending line are located at a same side of the bending line and form a first alignment notch mutually misaligned with a second alignment notch with the first alignment notch exposing a portion of the second plate element and the second alignment notch exposing a portion of the first plate element.

15. The method as claimed in claim 14, after bending the plate base, a bending portion connected between the first plate element and the second plate element is further formed.

16. The method as claimed in claim 14, after bending the plate base, the openings symmetrical to each other along the bending line are further overlapped with each other to form through holes.

17. The method as claimed in claim 14, wherein a material of the plate base comprises a metallic material or an alloy.