Aluminum extrusion heat sink structure and corresponding backlight module

• US 9,039,267 B2
• Filed: 06/07/2012
• Issued: 05/26/2015
• Est. Priority Date: 05/16/2012
• 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: Que, Chengwen, Chen, Shih-Hsiang, Wang, Jiaqiang
• Primary Examiner(s): RALEIGH, DONALD L
• Application Number:
  US13/639,471
• Publication Number:
  US 20130308340A1
• Time in Patent Office: 1,083 Days
• US Class Current: 362/612
• 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 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/133628 with cooling means

Abstract

The present invention relates to an aluminum extrusion heat sink structure and a corresponding backlight module. The aluminum extrusion heat sink structure comprises a light source connecting portion, a back plate connecting portion and a light guide plate support portion. The manufacture cost of the aluminum extrusion heat sink structure is lower, and the heat dissipation effect is better, so as to solve the technology problem that the volume of a traditional aluminum extrusion heat sink structure is larger caused the cost of the aluminum extrusion heat sink structure and the corresponding backlight module is higher.

Claims

1. An aluminum extrusion heat sink structure, comprising:

a light source connecting portion connected with a light emitting diode (LED) light source;

a back plate connecting portion connected with the light source connecting portion and has a surface contact with a back plate; and

a light guide plate support portion which is forward to a direction of the light guide plate, projects from the back plate connecting portion, is used to support the light guide plate, and comprises;

a contact member which is used to support the light guide plate, and has a surface contact with the light guide plate; and

a support member which is used to connect with the contact member and the back plate connecting portion;

wherein the light guide plate support portion is formed as a hollow trapezoid;

wherein a contact area between the contact member of the light guide plate support portion and the light guide plate is larger than a horizontal cross section area of the support member of the light guide plate support portion, and the horizontal cross section of the support member is parallel to a light-out plane of the light guide plate; and

wherein a plurality of fin heat dissipation units is disposed on the contact member of the light guide plate support portion, and the fin heat dissipation units contact with the light guide plate; and

wherein the light source connecting portion, the back plate connecting portion and the light guide plate support portion are formed as a single aluminum extrusion heat sink structure which is disposed on and separated from the back plate.

2. The aluminum extrusion heat sink structure according to claim 1, wherein the light guide plate support portion is formed as an upside-down “

L”

shape.

3. The aluminum extrusion heat sink structure according to claim 1, wherein a reflecting sheet is disposed between the light guide plate support portion and the light guide plate.