LIGHTING DEVICE

• US 20130100674A1
• Filed: 07/06/2012
• Published: 04/25/2013
• Est. Priority Date: 07/08/2011
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: Ji Hoo Kim
• Inventors: Kim, Ji Hoo, Choi, Tae Young, Kim, Do Hwan, Kang, Sung Ku, Jung, Chan Hyung
• Granted Patent: US 8,931,921 B2
• Time in Patent Office: Days
• US Class Current: 362/249.14
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 19/001 the light sources being semiconductors devices, e.g. LEDs
• CPC Class Codes: F21V 21/00 Supporting, suspending, or attaching arrangements for lighting devices F21V17/00, F21V19/00 take precedence; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q, stands for supporting apparatus or articles in general F16M11/00; Hand grips
• CPC Class Codes: F21V 23/001 the elements being electrical wires or cables
• CPC Class Codes: F21V 23/002 Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/73 the elements being adjustable with respect to each other, e.g. hinged
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• 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 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21V 31/04 Provision of filling media
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 : characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2115/10 : Light-emitting diodes [LED]

Abstract

A lighting device may be provided to include a heat sink which includes a receiving recess and a top surface including a hole; a light source module which includes a substrate disposed on the heat sink, a light emitting device disposed on the substrate and a pad disposed on the substrate; a power supplier which is disposed in the receiving recess of the heat sink and includes a projection outputting a power signal for driving the light source module; and a connector which is coupled to the hole of the heat sink, includes a contacting part electrically connected to the pad of the light source module, and is electrically connected to the projection of the power supplier.

Claims

1. A lighting device comprising:

a heat sink which includes a receiving recess and a top surface including a hole;

a light source module which includes a substrate disposed on the heat sink, a light emitting device disposed on the substrate and a pad disposed on the substrate;

a power supplier which is disposed in the receiving recess of the heat sink and includes a projection outputting a power signal for driving the light source module; and

a connector which is coupled to the hole of the heat sink, includes a contacting part electrically connected to the pad of the light source module, and is electrically connected to the projection of the power supplier.

2. The lighting device of claim 1, wherein the connector includes a recess to which the projection of the power supplier is coupled and a connection portion which is disposed in the recess and is electrically connected to the contacting part, and wherein the projection of the power supplier includes an electrode plate which outputs the power signal and is connected to the connection portion.

3. The lighting device of claim 1, wherein the light source module comprises:

a first light source unit which includes a first substrate, a first light emitting device and a first and a second pads;

a second light source unit which includes a second substrate, a second light emitting device and a third and a fourth pads;

a connecting plate which electrically connects the first pad of the first light source unit and the third pad of the second light source unit; and

a connector which includes a first contacting part and a second contacting part, wherein the first contacting part receives a first power signal and is electrically connected to the second pad of the first light source unit, and wherein the second contacting part receives a second power signal and is electrically connected to the fourth pad of the second light source unit.

4. The lighting device of claim 3, wherein the connecting plate comprises a middle portion, a first contacting part and a second contacting part, wherein the first contacting part is electrically connected to the first pad of the first light source unit, and wherein the second contacting part is electrically connected to the third pad of the second light source unit.

5. The lighting device of claim 3, wherein the connector comprises:

a first connection member which includes the first contacting part and the second contacting part; and

a second connection member which includes a first connection portion electrically connected to the first contacting part and a second connection portion electrically connected to the second contacting part, and extends from one side of the first connection member.

6. The lighting device of claim 1, further comprising a cover which is disposed on the light source module and is coupled to the heat sink, wherein the heat sink further includes a guide connected to the outer circumference of the top surface, wherein the cover includes a hook, wherein the guide of the heat sink includes a hitching sill coupled to the hook, wherein the cover includes a reference member and wherein the top surface of the heat sink include a reference recess which is coupled to the reference member.

7. The lighting device of claim 6, wherein the cover further comprises a connection member which has a portion thereof where the hook is disposed.

8. The lighting device of claim 7, wherein a plurality of the connection members are disposed on the edge of the cover and wherein the plurality of the connection members are disposed separately from each other.

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

a cover which is disposed on the light source module and is coupled to the heat sink; and

a member which is disposed on the heat sink and includes a guide recess in which the light source module and the connector are disposed, wherein the member reflects light incident from the inner surface of the cover toward the cover.

10. The lighting device of claim 1, wherein the heat sink comprises a first heat radiating fin and a second heat radiating fin, and wherein a volume of the first heat radiating fin is greater than that of the second heat radiating fin.

11. The lighting device of claim 10, wherein the plural first heat radiating fins and the plural second heat radiating fins are alternately disposed.

12. The lighting device of claim 11, wherein an interval between the first heat radiating fin and the second heat radiating fin is equal to or greater than 1 mm and equal to or less than 3 mm.

13. The lighting device of claim 1, further comprising an inner case which is disposed in the receiving recess of the heat sink and in which the power supplier and a molding part having a molding material are disposed, wherein the inner case includes an opening into which the molding material is injected and a packing which blocks the opening, wherein the power supplier includes a wire electrically connected to a socket through the opening of the inner case, and wherein the packing includes a gap in which the wire is disposed.

14. The lighting device of claim 13, wherein the gap is formed by digging or widening a portion of the outer circumference of the packing in the internal direction of the packing, and wherein when the packing is coupled to the opening of the inner case, the gap fixes the wire.

15. The lighting device of claim 1, comprising:

an inner case which receives the power supplier and is disposed in the receiving recess of the heat sink; and

a socket which is coupled to the inner case and includes a screw recess,

wherein the inner case includes a screw thread corresponding to the screw recess of the socket,

wherein the screw thread includes a plurality of cavities in which a first wire electrically connecting the power supplier and the socket is disposed,

and wherein the plurality of cavities are arranged adjacently.

16. The lighting device of claim 1, comprising:

an inner case which receives the power supplier and is disposed in the receiving recess of the heat sink; and

a socket which is coupled to the inner case,

wherein the inner case includes a projection projecting in the direction in which the inner case is coupled to the socket,

wherein the inner case includes an opening formed on one side thereof coupled to the socket and includes a packing blocking the opening, and wherein the projection of the inner case is disposed around the packing.

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

an inner case which receives the power supplier and is disposed in the receiving recess of the heat sink; and

a holder, together with the inner case, covers the power supplier,

wherein the power supplier includes a guide connected to the projection,

and wherein the holder includes a hole in which the projection of the power supplier is disposed and a guide recess to which the guide of the power supplier is coupled.

18. A lighting device comprising:

a heat sink which includes a top surface and a receiving recess;

a power supplier which is disposed in the receiving recess of the heat sink and includes a projection including an electrode plate;

a light source module which is disposed on the heat sink; and

a connector which includes a first connection member electrically connected to the light source module and a second connection member electrically connected to the power supplier,

wherein the second connection member includes a recess to which the projection of the power supplier is coupled and a connection portion electrically connected to the electrode plate.

19. The lighting device of claim 18, wherein when the connection portion contacts with the electrode plate, the connection portion is pushed into the inside of the second connection member, and wherein when the connection portion is separated from the electrode plate, the connection portion projects to the recess of the second connection member.

20. The lighting device of claim 18, further comprising a member which is disposed on the heat sink, includes a guide recess in which the light source module and the connector are disposed and has electrical insulation, wherein the light source module further includes a plurality of light source units and a connecting plate for connecting the light source units, and wherein the connecting plate is disposed on the member.