LIGHT SOURCE HEAT DISSIPATION STRUCTURE AND BACKLIGHT MODULE

• US 20120120631A1
• Filed: 08/29/2011
• Published: 05/17/2012
• Est. Priority Date: 11/16/2010
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: ZHANG, PANGLING
• Granted Patent: US 9,004,721 B2
• Time in Patent Office: Days
• US Class Current: 362/97.1
• CPC Class Codes: F21S 4/20 with light sources held by or within elongate supports
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G09F 13/04 Signs, boards or panels, illuminated from behind the insignia

Abstract

Disclosed are a light source heat dissipation structure and a backlight module. The light source heat dissipation structure comprises at least one light bar having two lateral faces; and a heat dissipation base, comprising: a frame having an inner space, at last one open and a upper surface, and the open is formed on the frame and connected to the inner space, and the open comprises at least one open edge; and at least one elastic abutting wall having an attached surface; wherein the elastic abutting wall is fixed on the open edge, and the light bar is embedded in the open, and the attached surface is attached to the lateral face of the light bar to enlarge the contact area between the light bar and the heat dissipation base. The heat dissipation efficiency and the usage lifetime of the LED packaged structure can be improved accordingly.

Claims

1. A light source heat dissipation structure, comprising:

at least one light bar, having two lateral faces; and

a heat dissipation base, comprising;

a frame, having an inner space, at last one open and a upper surface, and the open is formed on the frame and connected to the inner space, and the open comprises at least one open edge; and

at least one elastic abutting wall having an attached surface;

wherein the elastic abutting wall is fixed on the open edges, and the light bar is embedded in the open, and the attached surface of the elastic abutting wall is attached to the lateral face of the light bar; and

the heat dissipation base is an aluminum extruded section and the light bar divides the inner space of the frame into two heat dissipation airflow channels.

2. A backlight module having a light source heat dissipation structure, wherein the backlight module having a light source heat dissipation structure comprises:

at least one light bar, having two lateral faces; and

a heat dissipation base, comprising;

a frame, having an inner space, at last one open and a upper surface, and the open is formed on the frame and connected to the inner space, and the open comprises at least one open edge; and

at least one elastic abutting walls having an attached surface;

wherein the elastic abutting wall is fixed on the open edges, and the light bar is embedded in the open and the attached surface of the elastic abutting wall is attached to the lateral face of the light bar.

3. The backlight module of claim 2, wherein the light bar comprises:

at least one LED packaged structure; and

a carrier, having two lateral faces and a lower surface, and the carrier is electrically connected to the LED packaged structure;

the attached surface of the elastic abutting wall is attached to the lateral faces of carrier, and the lower surface of the carrier contacts the bottom of the inner space.

4. The backlight module of claim 2, wherein the heat dissipation base comprises the two elastic abutting walls and the open comprises two open edges parallel with each other, wherein fixed ends of the elastic abutting walls are fixed on the open edges of the open.

5. The backlight module of claim 4, wherein fixed ends of the elastic abutting walls are fixed on the open edges of the open by welding, gluing, riveting, screws.

6. The backlight module of claim 3, wherein the attached surfaces of the elastic abutting walls and the lateral faces of the carrier are fixedly locked with at least one screw.

7. The backlight module of claim 2, wherein a second surface of the heat dissipation base further comprises at least one heat dissipation fin.

8. The backlight module of claim 2, wherein the light bar divides the inner space of the frame into two heat dissipation airflow channels.

9. The backlight module of claim 2, wherein the elastic abutting wall and the frame are one-body formed.

10. The backlight module of claim 2, wherein the heat dissipation base is an aluminum extruded section.

11. A light source heat dissipation structure, comprising:

at least one light bar, having two lateral faces; and

a heat dissipation base, comprising;

a frame, having an inner space, at last one open and a upper surface, and the open is formed on the frame and connected to the inner space, and the open comprises at least one open edge; and

at least one elastic abutting wall having an attached surface;

wherein the elastic abutting wall is fixed on the open edges, and the light bar is embedded in the open, and the attached surface of the elastic abutting wall is attached to the lateral face of the light bar.

12. The light source heat dissipation structure of claim 11, wherein the light bar comprises:

at least one LED packaged structure; and

a carrier, having two lateral faces and a lower surface, and the carrier is electrically connected to the LED packaged structure;

the attached surface of the elastic abutting wall is attached to the lateral faces of carrier, and the lower surface of the carrier contacts the bottom of the inner space.

13. The light source heat dissipation structure of claim 11, wherein the heat dissipation base comprises the two elastic abutting walls and the open comprises two open edges parallel with each other, wherein fixed ends of the elastic abutting walls are fixed on the open edges of the open.

14. The light source heat dissipation structure of claim 13, wherein the fixed ends of the elastic abutting walls are fixed on the open edges of the open by welding, gluing, riveting, screws or one-body formed on the open edges of the open.

15. The light source heat dissipation structure of claim 12, wherein the attached surfaces of the elastic abutting walls and the lateral faces of the carrier are fixedly locked with at least one screw.

16. The light source heat dissipation structure of claim 11, wherein a second surface of the heat dissipation base further comprises at least one heat dissipation fin.

17. The light source heat dissipation structure of claim 11, wherein the light bar divides the inner space of the frame into two heat dissipation airflow channels.

18. The light source heat dissipation structure of claim 11, wherein the elastic abutting wall and the frame are one-body formed.

19. The light source heat dissipation structure of claim 11, wherein the heat dissipation base is an aluminum extruded section.