LED lamp

• US 7,914,178 B2
• Filed: 04/29/2009
• Issued: 03/29/2011
• Est. Priority Date: 02/18/2009
• Status: Expired due to Fees

• Current Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Original Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Inventors: Xiang, Qian, Yu, Guang
• Primary Examiner(s): Husar; Stephen F
• Application Number:
  US12/432,740
• Publication Number:
  US 20100208461A1
• Time in Patent Office: 699 Days
• Field of Search: 362/218, 362/241, 362/249.02, 362/249.06, 362/294, 362/373
• US Class Current: 362/294
• CPC Class Codes: F21S 8/06 by suspension
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/74 with fins or blades
• 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 29/777 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A hanging LED lamp includes a base, a heat sink attached to a bottom of the base, a plurality of heat conducting plates coupled to a periphery of the heat sink and connecting with the base and the heat sink, a plurality of LED modules mounted on the heat conducting plates, a cover engaging the base and covering the heat sink, the heat conducting plates and the LED modules therein, and a fixing member connecting a top of the base to fix the LED lamp in a desired position. A plurality of heat pipes are embedded in the heat conducting plates with first ends connecting with the heat sink and second ends connecting with the base.

Claims

1. A light emitting diode (LED) lamp, comprising:

a base with a plurality of fins formed on a top thereof,

a heat sink coupled to a bottom of the base;

a plurality of heat conducting plates coupled to a periphery of the heat sink, each heat conducting plate having one end connecting to the heat sink, and an opposite end connecting to the bottom of the base, and configured to being angled with the base and the heat sink;

a plurality of LED modules attached to the heat conducting plates respectively; and

a fixing member connected to the top of the base, adapted for fixing the LED lamp on a desired position.

2. The LED lamp as claimed in claim 1, wherein the heat sink comprises a heat conducting body, a plurality of first heat conducting branches extending outwardly from a periphery of the heat conducting body and a plurality of second heat conducting branches symmetrically extending from each of the first heat conducting branches, each first heat conducting branch having a rectangular shape.

3. The LED lamp as claimed in claim 2, wherein the heat conducting plates each comprise a heat absorbing portion on which the LED modules are mounted, and two engaging portions bent from two ends of the heat absorbing portion, and wherein one of the engaging portions connects with an end of one of the second heat conducting branches far away from the base, another one of the engaging portions connects to the base.

4. The LED lamp as claimed in claim 3, further comprising at least one heat pipe embedded in each of the heat conducting plates, the at least one heat pipe comprising two heat dissipating sections respectively connecting the base and the one of the second heat conducting branches of the heat sink.

5. The LED lamp as claimed in claim 3, wherein the one of the engaging portions connects with an end of an outermost one of the second heat conducting branches.

6. The LED lamp as claimed in claim 2, wherein the heat conducting body of the heat sink is tubular in shape and the first heat conducting branches extend radially and outwardly from the periphery of the heat conducting body.

7. The LED lamp as claimed in claim 1, further comprising a cover engaging the base and covering the heat sink, the heat conducting plates and the LED modules, and a plurality of envelopes adhered to a plurality of windows defined in the cover for projection of light generated by the LED modules therethrough.

8. The LED lamp as claimed in claim 1, further comprising a plurality of panel-shaped first reflectors mounted on the LED modules respectively, and a plurality of second reflectors surrounding the LED modules respectively.

9. The LED lamp as claimed in claim 1, wherein the fixing member consists of a plurality of chains.

10. The LED lamp as claimed in claim 1, wherein the heat conducting plates are inclinedly disposed to define an acute angle between each of the heat conducting plates and the heat sink.

11. An LED lamp, comprising:

a base;

a heat sink attached to a bottom of the base and comprising a heat conducting body and a plurality of heat conducting branches symmetrically located around an outer surface of the heat conducting body;

a plurality of heat conducting plates with first ends thereof connecting with corresponding heat conducting branches and opposite second ends thereof connecting with the base; and

a plurality of LED modules mounted on the heat conducting plates.

12. The LED lamp as claimed in claim 11, wherein the base is round and the heat sink is attached to a center of the bottom of the base, and wherein the first ends of the heat conducting plates connecting with the corresponding heat conducting branches are located near a free end of the heat sink, the opposite second ends of the heat conducting plates connecting with the base are located near a periphery of the base.

13. The LED lamp as claimed in claim 11, wherein the heat conducting branches comprise first branches extending from the outer surface of the heat conducting body and a plurality of second branches crossed with each of the first branches, an outermost one of the second branches connects a corresponding one of the first ends of the heat conducting plates.

14. The LED lamp as claimed in claim 11, further comprising at least one heat pipe embedded in one of the heat conducting plates and connecting with one of the corresponding heat conducting branches of the heat sink and the base.

15. The LED lamp as claimed in claim 11, further comprising a cover engaging the base and covering the heat sink, the heat conducting plates and the LED modules, and a plurality of envelopes adhered to a plurality of windows defined in the cover for projection of light generated by the LED modules therethrough.

16. The LED lamp as claimed in claim 11, further comprising a plurality of panel-shaped first reflectors mounted on the LED modules respectively, and a plurality of second reflectors surrounding the LED modules respectively.

17. The LED lamp as claimed in claim 11, further comprising a fixing member consisting of a plurality of chains and connected to a top of the base.