Street lamp

• US 8,579,469 B2
• Filed: 07/10/2012
• Issued: 11/12/2013
• Est. Priority Date: 07/07/2010
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Kong, Kyung-Il, Kim, Han Gyoul, Kim, Kwang Soo
• Primary Examiner(s): DZIERZYNSKI, EVAN P
• Application Number:
  US13/545,561
• Publication Number:
  US 20120275155A1
• Time in Patent Office: 490 Days
• Field of Search: 362/431, 362/249.02, 362/373
• US Class Current: 362/249.02
• CPC Class Codes: F21S 8/08 with a standard F21S6/00 takes precedence
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• 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 21/10 Pendants, arms, or standards; Fixing lighting devices to pendants, arms, or standards adjustable mounting F21V21/14; construction of posts not peculiar to use with lighting devices E04H12/00
• CPC Class Codes: F21V 21/108 Arms
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• 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 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/00 Combination of light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The street lamp comprises: a heat radiating body comprising top surface, a bottom surface and a plurality of heat radiating fins being formed on the top surface; an LED module comprising a substrate disposed on the bottom surface of the heat radiating body and a plurality of LEDs disposed on one side of the substrate; and a heat radiating body cover disposed on the top surface of the heat radiating body, wherein the heat radiating body cover comprises a plurality of heat radiating openings corresponding to the plurality of the heat radiating fins, and wherein the heat radiating body cover is disposed at positions higher or lower than positions of peaks of the plurality of the heat radiating fins.

Claims

1. A street lamp comprising:

a heat radiating body including a top surface, a bottom surface and a plurality of heat radiating fins being formed on the top surface;

a light emitting diode (LED) module including a substrate disposed on the bottom surface of the heat radiating body and a plurality of LEDs disposed on one side of the substrate; and

a heat radiating body cover disposed on the top surface of the heat radiating body,

wherein the heat radiating body cover includes a plurality of heat radiating openings corresponding to the plurality of the heat radiating fins, and

wherein the heat radiating body cover is disposed at positions higher or lower than positions of peaks of the plurality of the heat radiating fins.

2. The street lamp of claim 1, wherein the heat radiating fin has a size and a shape for allowing the heat radiating fin to freely pass through the heat radiating opening.

3. The street lamp of claim 1, wherein the plurality of the heat radiating openings are arranged in parallel with each other in one direction.

4. The street lamp of claim 1, wherein the top surface of the heat radiating body has a convex-up shape.

5. The street lamp of claim 4, wherein the heat radiating body further includes an edge portion surrounding an outermost of the top surface, and wherein the edge portion has at least one draining hole.

6. The street lamp of claim 1, wherein the top surface of the heat radiating body is flat, and wherein the plurality of the heat radiating fins have mutually different heights.

7. The street lamp of claim 1, wherein the heat radiating body cover has a convex-up shape.

8. The street lamp of claim 1, wherein the plurality of the heat radiating openings have same shapes as the plurality of the heat radiating fins and are arranged in parallel with each other in one direction in a same way as the heat radiating fins are arranged.

9. A street lamp comprising:

a heat radiating body including a top surface, a plurality of heat radiating fins formed on the top surface, a first bottom surface and a second bottom surface; and

a light emitter including a first light emitter disposed on the first bottom surface and a second light emitter disposed on the second bottom surface; and

a heat radiating body cover disposed on the top surface of the heat radiating body,

wherein the first and the second light emitters include a substrate and a light emitting device disposed on the substrate each other,

wherein the first bottom surface and the second bottom surface have a same inclination from each other,

wherein the heat radiating body cover includes a plurality of heat radiating openings corresponding to the plurality of the heat radiating fins, and

wherein the heat radiating body cover is disposed at positions higher or lower than positions of peaks of the plurality of the heat radiating fins.

10. The street lamp of claim 9, further comprising a cover glass disposed on the light emitter and including a flat surface, wherein the first bottom surface and the second bottom surface are an acute angle with respect to the flat surface of the cover glass.

11. The street lamp of claim 10, wherein the top surface is convex-up to allow fluid to flow along an edge of the heat radiating body.

12. The street lamp of claim 9, further comprising a thermal pad disposed between the bottom surface of the heat radiating body and the light emitter.

13. The street lamp of claim 9, further comprising a connector guide disposed on the bottom surface of the heat radiating body, preventing the substrate of the first and second light emitter from separating from the bottom surface of the heat radiating body.

14. A street lamp comprising:

a heat radiating body including a top surface, a plurality of heat radiating fins formed on the top surface, a bottom surface and a contact part;

a cover disposed on the top surface of the heat radiating body and including a plurality of heat radiating openings corresponding to the plurality of the heat radiating fins;

a light emitter disposed on the bottom surface of the heat radiating body; and

a lamp post connector coupled to the contact part of the heat radiating body and radiating a conducted heat from the heat radiating body,

wherein the contact part of the heat radiating body includes a flat surface, and

wherein the lamp post connector includes a flat portion contacting the flat surface of the contact part,

wherein the cover further includes an extension part covering the contact part of the heat radiating body and the flat portion of the lamp post connector,

wherein the contact part of the heat radiating body has a first hole for discharging fluid generated between the flat surface of the contact part of the heat radiating body and the flat portion of the lamp post connector,

wherein the heat radiating body further includes an edge portion coupled to the contact part, wherein the edge portion has a second hole for draining rain water flowing along the top surface of the heat radiating body.

15. The street lamp of claim 14, wherein the contact part of the heat radiating body has a seating cavity for receiving the flat portion of the lamp post connector.

16. The street lamp of claim 14, wherein the top surface is convex-up to allow fluid to flow along an edge of the heat radiating body.

17. The street lamp of claim 14, wherein the cover is disposed at positions higher or lower than positions of peaks of the plurality of the heat radiating fins.

18. The street lamp of claim 14, further comprising a lamp post coupled to the lamp post connector, wherein the lamp post has a power supply electrically connected to the light emitter.

19. The street lamp of claim 14, further comprising a heat radiating body bracket coupled to the contact part of heat radiating body,

wherein the flat portion of the lamp post connector is disposed between the contact part and the heat radiating body bracket.