LED lamp

• US 7,997,768 B2
• Filed: 02/23/2009
• Issued: 08/16/2011
• Est. Priority Date: 10/27/2008
• 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: Zheng, Shi-Song
• Primary Examiner(s): Truong; Bao Q
• Application Number:
  US12/391,181
• Publication Number:
  US 20100103671A1
• Time in Patent Office: 904 Days
• Field of Search: 362/294, 362/373, 362/345, 362/547, 362/404, 362/800, 362/580, 362/126, 362/218, 362/264, 362/249.02
• 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: F21S 2/005 of modular construction
• CPC Class Codes: F21S 8/06 by suspension
• CPC Class Codes: F21V 29/717 using split or remote units thermally interconnected, e.g. by thermally conductive bars or heat pipes
• 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: F21Y 2115/10 Light-emitting diodes [LED]
• 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 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

An LED (light emitting diode) lamp includes an upper base plate, a lower base plate spaced from the upper base plate and a plurality of light emitting modules located between the two base plates. The lower base plate defines a plurality of through holes therein. Each light emitting module comprises a heat sink sandwiched between the two base plates, an LED module embedded in a bottom surface of the heat sink and a lens engaging with the bottom surface of the conductive cylinder to enclose the LED module therein. A lower portion of each lens extends downwardly through a corresponding through hole.

Claims

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

an upper base plate;

a lower base plate spaced from the upper base plate and defining a plurality of through holes therein; and

a plurality of light emitting modules located between the two base plates, each light emitting module comprising a heat sink sandwiched between the two base plates and an LED module embedded in a bottom surface of the heat sink;

wherein the LED modules are respectively in alignment with the through holes of the lower base plate to generate light through corresponding through holes; and

wherein the heat sink of each of the light emitting modules comprises a conductive cylinder and a plurality of fins extending outwardly and radially from a circumference of the conductive cylinder, the LED module embedded in a bottom surface of the conductive cylinder.

2. The LED lamp as claimed in claim 1, wherein each of the light emitting modules comprises a lens engaging with the bottom surface of the conductive cylinder to enclose the LED module therein, and wherein the lens has a lower portion extending downwardly through a corresponding through hole.

3. The LED lamp as claimed in claim 2, wherein the bottom surface of the conductive cylinder of the heat sink is recessed inwardly to define a receiving recess accommodating the LED module therein, and an annular step facing downwardly and below the receiving recess.

4. The LED lamp as claimed in claim 3, wherein the lens of each of the light emitting modules has an engaging flange extending outwardly from an upper end thereof, an annular wall being defined in the conductive cylinder of the heat sink and extending upwardly from an inner edge of the annular step for engaging an outer circumference of the engaging flange of the lens.

5. The LED lamp as claimed in claim 4, wherein each of the light emitting modules comprises a retaining ring which is put on the lower portion of the lens and abutted simultaneously against the annular step and a bottom surface of the engaging flange.

6. The LED lamp as claimed in claim 1, wherein the conductive cylinder of the heat sink has a plurality of conductive plates extending outwardly from a circumference thereof, each conductive plate defining a retaining sleeve in distal end thereof.

7. The LED lamp as claimed in claim 6, wherein a plurality of bolts are received in the retaining sleeves and each have two opposite ends engaging with the two base plates to assemble the two base plates and the light emitting modules together.

8. The LED lamp as claimed in claim 1, wherein the two base plates parallel to each other are triangular, and each have three round corners and three bevel edges curved inwards, the two base plates having flanges extending from edges thereof toward each other.

9. The LED lamp as claimed in claim 1, further comprising a fixing member comprising a fixing part and a plurality of suspending wires connected to the fixing part and the upper base plate.

10. An LED (light emitting diode) lamp, comprising:

an upper base plate;

a lower base plate spaced from the upper base plate and defining a plurality of through holes therein; and

a plurality of light emitting modules located between the two base plates, each of the light emitting modules comprising a heat sink sandwiched between the two base plates, the heat sink of each of the light emitting modules comprising a conductive cylinder and a plurality of fins extending outwardly and radially from a circumference of the conductive cylinder, an LED module embedded in a bottom surface of the conductive cylinder of the heat sink and a lens engaging with the bottom surface of the conductive cylinder to enclose the LED module therein;

wherein a lower portion of each lens extends downwardly through a corresponding through hole.

11. The LED lamp as claimed in claim 10, wherein the bottom surface of the conductive cylinder of the heat sink is recessed inwardly to define a receiving recess accommodating the LED module therein and an annular step facing downwardly and located below the receiving recess.

12. The LED lamp as claimed in claim 11, wherein the lens of each of the light emitting modules has an engaging flange extending outwardly from an upper end thereof, an annular wall being defined in the conductive cylinder and extending upwardly from an inner edge of the annular step and engaging an outer circumference of the engaging flange of the lens.

13. The LED lamp as claimed in claim 12, wherein each of the light emitting modules comprises a retaining ring which is put on a part of the lower portion of the lens immediately below the engaging flange and abuts simultaneously against the annular step and a bottom surface of the engaging flange.

14. The LED lamp as claimed in claim 10, wherein the conductive cylinder of the heat sink has a plurality of conductive plates extending outwardly from a circumference thereof, each conductive plate defining a retaining sleeve in distal end thereof.

15. The LED lamp as claimed in claim 14, wherein a plurality of bolts are received in the retaining sleeves and each have two opposite ends engaging with the two base plates to assemble the two base plates and the light emitting modules together.

16. The LED lamp as claimed in claim 10, wherein the two base plates are triangular in shape, each having three round corners and three bevel edges curved inwards, the two base plates having flanges extending toward each other.