LIGHTING DEVICE

• US 20110205743A1
• Filed: 05/03/2011
• Published: 08/25/2011
• Est. Priority Date: 06/05/2009
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KIM, EUN HWAN, LIM, DONG NYUNG
• Granted Patent: US 8,186,848 B2
• Time in Patent Office: Days
• US Class Current: 362/294
• CPC Class Codes: F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings
• CPC Class Codes: F21S 45/50 Waterproofing
• 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 27/00 Cable-stowing arrangements structurally associated with lighting devices, e.g. reels storing lengths of cable in general B65H; the lighting devices being vehicle headlamps F21S41/192; the lighting devices being vehicle lights F21S43/195
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting device includes a case body including a receiving cavity and at least a portion including at least one first hole, a light emitting module in the receiving cavity, the light emitting module including a plurality of light emitting devices, a lens on the light emitting module, and a case cover including an opening through which the lens is exposed, the case cover being disposed on the case body. A heat sink is between the light emitting module and the case body to transfer heat from the light emitting module to the case where the case body acts as a conduit to transfer heat from the light emitting module to the portion of the case body including at least one first hole and the case cover has at least a portion including at least one second hole and the first hole of the case body corresponds with the second hole of the case cover.

Claims

1. A lighting device comprising:

a light emitting module including a substrate and a light emitting device mounted on the substrate;

a case body receiving the light emitting module;

a gap member wider than the substrate;

a lens on the light emitting module;

a first ring provided on a peripheral portion of the lens; and

a case cover coupled with the case body and having an opening,

wherein the case body is provided therein with a coupling cavity in which the gap member is seated, and a lateral portion of the gap member is supported by the case body.

2. The lighting device of claim 1, further comprising a heatsink plate under the substrate of the light emitting module.

3. The lighting device of claim 1, wherein the gap member is interposed between the light emitting module and the lens so that the light emitting module is spaced apart from the lens.

4. The lighting device of claim 1, further comprising:

a through hole formed through a bottom surface of the case body; and

a lead electrode electrically connected to the substrate and exposed to an outside by the through hole.

5. The lighting device of claim 4, further comprising a second ring protruding from the bottom surface of the case body and formed on a peripheral portion of the through hole.

6. The lighting device of claim 1, wherein the case body is provided at a boundary surface thereof with an inner wall and an outer wall, and at least one first hole is formed between the inner and outer walls,

wherein a protrusion is formed from a peripheral portion of the case cover and inserted into the first hole, and includes a screw groove, and

wherein a coupling screw is inserted into the screw groove through the first hole and coupled with the screw groove.

7. The lighting device of claim 1, wherein the case body is provided at a boundary surface thereof with an inner wall and an outer wall, and at least one first hole is formed between the inner and outer walls,

wherein a protrusion is formed from a peripheral portion of the case cover, inserted into the first hole, and includes a screw groove, and

wherein a coupling screw is inserted into the screw groove through the first hole and coupled with the screw groove.

8. The lighting device of claim 1, wherein the case body is provided at a peripheral portion thereof with at least one second hole screwed with an external support member.

9. The lighting device of claim 1, wherein the case body is provided at a peripheral portion thereof with a helix coupled with an external support member.

10. The light emitting device of claim 1, wherein the case body and the case cover are provided at a peripheral portion thereof with at least one heatsink hole to radiate heat emitted from the light emitting module.

11. The lighting device of claim 1, wherein the first ring surrounds a top surface and a lateral surface of an edge of the lens and is interposed between the edge of the lens and an internal lateral surface of the case cover.

12. The lighting device of claim 5, wherein the first ring or the second ring includes water-proof rubber or silicone material.

13. The lighting device of claim 1, wherein the case cover has an inclined lateral surface.

14. The lighting device of claim 1, wherein a boundary surface of the case body and the case cover has one of a circular shape, a square shape, a polygonal shape, and an oval shape.