Backlight assembly for liquid crystal display

• US 20050157521A1
• Filed: 01/20/2004
• Published: 07/21/2005
• Est. Priority Date: 01/20/2004
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Chen, Shih-Hsien, Sung, Kuang-Tao
• Application Number:
  US10/760,562
• Publication Number:
  US 20050157521A1
• Time in Patent Office: Days
• US Class Current: 362/633
• CPC Class Codes: G02B 6/0018 Redirecting means on the surface of the light guide
• CPC Class Codes: G02B 6/002 by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging 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 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 1/133612 Electrical details

Abstract

A backlight assembly includes a frame configured to mount a liquid crystal panel, a light-guide plate and one or more light-emitting devices. The frame includes a plurality of conductive members embedded in the body of the frame and protruding into contact pads for connecting to the light-emitting device. The conductive members externally connect to a power source to supply electrical current to the light-emitting device.

Claims

1. A backlight assembly for illuminating a liquid crystal panel, comprising:

a frame having a frame body in which are embedded a plurality of contact pads, wherein the frame body is configured to assemble the liquid crystal panel with the backlight assembly;

a light-guide plate mounted to the frame; and

one or more light-emitting device connected to the contact pads and respectively having a light-irradiating surface facing a first surface of the light-guide plate, light irradiated from the one or more light-emitting devices emerging out through a second surface of the light-guide plate towards the liquid crystal panel.

2. The backlight assembly according to claim 1, comprising a reflective sheet placed at a side of the light-guide plate to direct light towards the liquid crystal panel.

3. The backlight assembly according to claim 1, wherein the one or more light-emitting device is placed at a side of the light-guide plate opposite to the side of the liquid crystal panel.

4. The backlight assembly according to claim 3, wherein the one or more light-emitting device is positioned proximate to a side edge of the light-guide plate.

5. The backlight assembly according to claim 4, wherein a reflection member is provided in an area of the side edge of the light-guide plate to reflect light irradiated from the one or more light-emitting device.

6. The backlight assembly according to claim 5, wherein the reflection member is a reflective coating.

7. The backlight assembly according to claim 5, wherein the reflection member is a surface of the light-guide plate inclined at an angle.

8. The backlight assembly according to claim 3, wherein the light-guide plate includes one or more recessed cavity on the first surface for accommodating the light-irradiating surface of the one or more light-emitting device.

9. The backlight assembly according to claim 1, wherein the first surface of the light-guide plate is a side edge surface of the light-guide plate.

10. The backlight assembly according to claim 1, wherein the frame body is formed by injection-molding.

11. The backlight assembly according to claim 1, wherein the contact pads include resilient bent portions to which the one or more light-emitting device is connected by contact engagement.

12. The backlight assembly according to claim 1, wherein the one or more light-emitting device is connected to the contact pads by soldering.

13. The backlight assembly according to claim 1, wherein the contact pads are made of a conductive metal or metallic alloy.

14. The backlight assembly according to claim 1, wherein the one or more light-emitting device includes a light-emitting diode.

15. A frame structure for a backlight assembly, comprising:

a frame body configured to assemble a liquid crystal panel with the backlight assembly; and

a plurality of contact pads embedded in the frame body, wherein the contact pads externally connect to a power source and are configured to receive the mount of one or more light-emitting device.

16. The frame structure according to claim 15, wherein the frame body is formed by injection-molding.

17. The frame structure according to claim 15, wherein the contact pads include resilient bent portions to which the one or more light-emitting device is connected by engagement.

18. The frame structure according to claim 15, wherein the contact pads are made of a conductive metal or metallic alloy.

19. The frame structure according to claim 15, wherein the one or more light-emitting device includes a light-emitting diode.