Light-emitting diode assembly and method of fabrication

• US 7,598,535 B2
• Filed: 07/20/2006
• Issued: 10/06/2009
• Est. Priority Date: 12/09/2005
• Status: Expired due to Fees

• Current Assignee: Foxconn Technology Co., Ltd.
• Original Assignee: Foxconn Technology Co., Ltd.
• Inventors: Lin, Yeu-Lih, Tan, Li-Kuang, Hu, Tseng-Hsiang
• Primary Examiner(s): Soward; Ida M
• Application Number:
  US11/309,257
• Publication Number:
  US 20070132092A1
• Time in Patent Office: 1,174 Days
• Field of Search: 257 98- 99, 257/675, 257706-707, 257/712, 257/930, 257/E23.051, 257/E23.08, 257/E23.113, 257/E25.028, 257/E25.032, 257/E31.131, 257/E33.001, 257/E33.054, 257/E33.075, 257/E33.077, 257/E51.018, 257/E51.022
• US Class Current: 257/99
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: F21V 29/74 with fins or blades
• 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 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/80 with pins or wires
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: Y10S 257/93 Thermoelectric, e.g. peltier effect cooling

Abstract

An LED assembly includes a packaged LED module (30) and a heat dissipation device (50). The LED module includes at least an LED die therein and a plurality of conductive pins (32, 34) extending downwardly from a bottom portion thereof. The heat dissipation device is thermally and electrically connected with the at least an LED die. The heat dissipation device defines at least a mounting hole (542) therein. At least one of the conductive pins is fittingly received in the at least a mounting hole and thermally and electrically connects with the heat dissipation device.

Claims

1. An LED assembly comprising:

an LED module having at least an LED die therein and at least first and second conductive pins electrically connecting with the at least an LED die;

a heat dissipation device made of metal and having a plurality of fins thereon, electrically and thermally connecting with the at least first conductive pin of the LED module;

a power source line electrically connecting with the at least second conductive pin, adapted for electrically connecting the at least second conductive pin with a power source; and

a conductive post electrically connecting with the heat dissipation device, adapted for electrically connecting the at least first conductive pin with the power source.

2. The LED assembly of claim 1, wherein the heat dissipation device has a central column and the fins are circular-shaped and extend laterally outwardly from an outer periphery of the central column.

3. The LED assembly of claim 1, wherein the heat dissipation device has an upper chassis and the fins extend downwardly from the chassis.

4. The LED assembly of claim 1, wherein the heat dissipation device has a central column and the fins extend longitudinally and radially outwardly from a periphery of the central column.

5. The LED assembly of claim 1, further comprising a mounting frame and a light reflector, wherein the heat dissipation device is received in the mounting frame, the light reflector is mounted on the heat dissipation device and the at least an LED module is mounted on the light reflector.

6. The LED assembly of claim 5, wherein the heat dissipation device has an upper protrusion extending through the light reflector, and the conductive post is fixed on a bottom plate of the mounting frame.