High power LED lamp with heat dissipation enhancement

• US 20080013316A1
• Filed: 07/17/2006
• Published: 01/17/2008
• Est. Priority Date: 07/17/2006
• Status: Active Grant

• Current Assignee: Liquidleds Lighting Corp.
• Original Assignee: Liquidleds Lighting Corp.
• Inventors: Chiang, Kun-Yuan
• Granted Patent: US 7,922,359 B2
• Time in Patent Office: Days
• US Class Current: 362/264
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21V 29/58 characterised by the coolants
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• 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 3/061 the material being glass
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/45144 Gold (Au) as principal constituent
• 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 2224/49109 outside the semiconductor or solid-state body
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• 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

Abstract

A high power LED lamp comprises a container having a cavity to fill with a liquid, a light source module for providing a high power LED source light to penetrate through the liquid, and an axial thermal conductor having a first portion nearby the light source module and a second portion extending in the liquid along an axial direction of the cavity to far away from the light source module to evenly transfer heat from the light source module through the liquid to the container.

Claims

1. A high power LED lamp, comprising:

a container having a cavity;

a liquid in the cavity;

a light source module for providing a high power LED source light to penetrate through the liquid; and

an axial thermal conductor having a first portion nearby the light source module and a second portion extending in the liquid along an axial direction of the cavity to far away from the light source module for evenly transferring heat from the light source module through the liquid to the container.

2. The lamp of claim 1, wherein the axial thermal conductor has a rod shape.

3. The lamp of claim 1, wherein the axial thermal conductor has a tube shape.

4. The lamp of claim 1, wherein the axial thermal conductor has a pillar shape.

5. The lamp of claim 1, wherein the axial thermal conductor comprises an axial fins assembly.

6. The lamp of claim 1, wherein the axial thermal conductor comprises a heat pipe.

7. The lamp of claim 1, wherein the light source module comprises a thermally conductive carrier for carrying one or more high power LED packages.

8. The lamp of claim 7, wherein the carrier is connected to the first portion of the axial thermal conductor.

9. The lamp of claim 8, wherein the carrier and the first portion of the axial thermal conductor both directly contact the liquid.

10. The lamp of claim 8, further comprising a cap for separating the carrier and the high power LED packages from the liquid.

11. The lamp of claim 7, wherein the carrier is nearby but not connected to the first portion of the axial thermal conductor.

12. The lamp of claim 11, wherein the carrier and the first portion of the axial thermal conductor both directly contact the liquid.

13. The lamp of claim 1, further comprising a sleeve sleeving on the axial thermal conductor for thermal convection enhancement.

14. The lamp of claim 1, wherein the light source module comprises a plurality of high power LED packages such that the high power LED source light includes at least two colors.

15. The lamp of claim 1, wherein the liquid comprises a plurality of phosphorescent or fluorescent particles.

16. The lamp of claim 1, wherein the liquid comprises an antifreeze.

17. The lamp of claim 1, further comprising an optical lens in the cavity for guiding the high power LED source light.

18. The lamp of claim 1, wherein the light source module comprises two face-to-face reflective cups, each of the reflective cups having one or more high power LED packages therewithin, the container comprises a tube between the two reflective cups such that the liquid fills inside, the first portion of the axial thermal conductor is nearby each or either of the reflective cups, and the second portion of the axial thermal conductor extends along an axial direction of the tube.