Bottom lighting type backlight module

• US 20070063338A1
• Filed: 08/04/2006
• Published: 03/22/2007
• Est. Priority Date: 09/16/2005
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Chen, Fen, Chang, Shao-Han
• Application Number:
  US11/499,320
• Publication Number:
  US 20070063338A1
• Time in Patent Office: Days
• US Class Current: 257/714
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133628 with cooling means

Abstract

A bottom lighting type backlight module includes a frame, a light diffusion plate and a plurality of light sources. The frame includes a base and a plurality of sidewalls extending from the peripheral of the base to define an opening. The base defines a plurality of heat dissipation channels therein. The heat dissipation channels are filled with a cooling liquid. The light diffusion plate disposed on the opening of the frame. The light sources are arranged on the base of the frame. The present backlight module has a thin body with good heat dissipation capability.

Claims

1. A bottom lighting type backlight module comprising:

a frame having a base and a plurality of sidewalls extending from the peripheral of the base to define an opening, wherein the base defines a plurality of heat dissipation channels therein, and the heat dissipation channels are filled with a cooling liquid;

a light diffusion plate disposed on the opening of the frame; and

a plurality of light sources arranged on the base of the frame.

2. The bottom lighting type backlight module according to claim 1, wherein the light sources are light emitting diodes.

3. The bottom lighting type backlight module according to claim 2, wherein the light emitting diodes are arranged on the base of the frame in a matrix manner.

4. The bottom lighting type backlight module according to claim 1, further comprising a reflecting unit having a substrate and a plurality of reflecting sidewalls extending from the peripheral of the substrate, wherein the substrate defines a plurality of holes therein according to the light sources, the reflecting unit is disposed on the base of the frame such that the light emitting diodes protrudes through the holes to emit light rays to enter the light diffusion plate.

5. The bottom lighting type backlight module according to claim 1, further comprising a prism sheet disposed on the light diffusion plate.

6. The bottom lighting type backlight module according to claim 5, further comprising a brightness enhancement sheet disposed on the prism sheet.

7. The bottom lighting type backlight module according to claim 1, wherein a material of the frame is selected from a group comprising copper and aluminum.

8. The bottom lighting type backlight module according to claim 1, wherein the heat dissipation channels are connected with each other and distributed in the base substantially, so as to absorb heat to the cooling liquid efficiently.

9. A backlight module comprising:

a plurality of light sources;

a light diffusion member arranged to receive light emitted from the light source;

a frame including a base thermally contacting the light sources, the base defining a plurality of heat dissipation channels therein;

a cooling fluid contained in the heat dissipation channels, wherein when the light sources emit light, the heat generated thereby is conducted to the base and then to the cooling fluid.