LED LAMP

• US 20090002995A1
• Filed: 06/27/2007
• Published: 01/01/2009
• Est. Priority Date: 06/27/2007
• Status: Active Grant

• Current Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Original Assignee: Foxconn Technology Co., Ltd.
• Inventors: HE, LI, XIAO, XU-HUA, LEE, TSUNG-LUNG
• Granted Patent: US 7,568,817 B2
• Time in Patent Office: Days
• US Class Current: 362/294
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21V 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/77 with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
• 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 3/02 characterised by the shape
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED lamp includes a transparent bulb, an LED module comprising a plurality of LEDs received in an inner space of the bulb, and a heat dissipation apparatus supporting and cooling the LED module. The heat dissipation device includes a heat sink having a hollow base and a plurality of fins extending from the base, a first heat conductor vertically supported by the heat sink, a second heat conductor horizontally mounted on the first heat conductor, and a heat pipe thermally connecting the heat sink, the first heat conductor and the second heat conductor together. The LEDs are positioned on the first heat conductor and the second heat conductor, respectively.

Claims

1. An LED lamp comprising:

a bulb;

an LED module comprising a plurality of LEDs received in the bulb;

a heat dissipation apparatus supporting and cooling the LED module, the heat dissipation device comprising;

a heat sink having a hollow base and a plurality of fins mounted on the base;

a first heat conductor supported by the heat sink;

a second heat conductor mounted on the first heat conductor;

a heat pipe thermally connecting the heat sink, the first heat conductor and the second heat conductor in series;

wherein the LEDs are positioned on the first heat conductor and the second heat conductor, respectively.

2. The LED lamp as described in claim 1, wherein the base has an upper end portion extending above the fins, and the upper end portion extends into the bulb.

3. The LED lamp as described in claim 2, wherein the first heat conductor is mounted on the upper end portion.

4. The LED lamp as described in claim 3, wherein the base has a lower end portion extending below the fins, and the lower end portion is adapted for connection with a supporting stand.

5. The LED lamp as described in claim 4, wherein the upper and lower end portions are located at different sides of the heat sink.

6. The LED lamp as described in claim 1, wherein the heat pipe has a first leg in contact with the heat sink and the first heat conductor, and a second leg extending from the first leg, the second leg contacting with the second heat conductor.

7. The LED lamp as described in claim 6, wherein the base has a channel defined therein, and a part of the first leg of the heat pipe is retained in the channel.

8. The LED lamp as described in claim 7, wherein the first heat conductor has a channel defined therein, and another part of the first leg of the heat pipe is retained in the channel of the first heat conductor.

9. The LED lamp as described in claim 8, wherein the second heat conductor has a groove defined therein, and the second leg of the heat pipe is retained in the groove.

10. The LED lamp as described in claim 9, wherein the channel of the base is defined in an inner wall of the base, the first heat conductor is hollow and has an inner surface, and the channel of the first heat conductor is defined in the inner surface.

11. The LED lamp as described in claim 6, wherein the first heat conductor has a plurality of side surfaces, each side surface has some of the plurality of LEDs mounted thereon, and the first leg of the heat pipe extends in the first heat conductor beside the some of the LED s on a corresponding side surface of the first heat conductor.

12. The LED lamp as described in claim 1, further comprising a reflector mounted on the heat sink, and the bulb is attached to the reflector.

13. The LED lamp as described in claim 1, wherein the LEDs mounted on the first heat conductor are oriented toward a first direction, the LEDs mounted on the second heat conductor are oriented toward a second direction, and the first direction is different from the second direction.

14. The LED lamp as described in claim 13, wherein the first direction is perpendicular to the second direction.

15. An LED lamp comprising:

a bulb;

an LED module comprising a plurality of LEDs received in the bulb;

a heat dissipation apparatus supporting and cooling the LED module, the heat dissipation device comprising;

a heat sink having a base and a plurality of fins mounted on the base;

a first heat conductor vertically supported by the heat sink;

a second heat conductor horizontally mounted on the first heat conductor;

a plurality of heat pipes each having a first leg in contact with the base and the first heat conductor, a second leg bent from the first leg and in contact with the second heat conductor;

wherein the LEDs are positioned on the first heat conductor and the second heat conductors, respectively

16. The LED lamp as described in claim 15, wherein the second heat conductor has a plurality of grooves defined therein, and the second legs of the heat pipes are retained in the grooves, respectively.

17. The LED lamp as described in claim 16, wherein the grooves radially and outwardly extend from a central point of the second heat conductor.

18. The LED lamp as described in claim 16, wherein the base and the first heat conductor are hollow structure, and a plurality of channels is defined in inner surfaces thereof, the first legs of the heat pipes are retained in corresponding channels in such a manner that each heat pipe has a part of the first leg retained in a corresponding channel of the first heat conductor, and another part of the first leg retained in a corresponding channel of the heat sink.