Lighting device

• US 8,534,865 B2
• Filed: 08/19/2010
• Issued: 09/17/2013
• Est. Priority Date: 08/19/2009
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Kim, Kwang Soo, Kong, Kyung IL, Kim, Hwayoung, Hong, Sang Jun
• Primary Examiner(s): Neils, Peggy A.
• Application Number:
  US12/805,796
• Publication Number:
  US 20110044023A1
• Time in Patent Office: 1,125 Days
• Field of Search: 362/225, 362/235, 362/240, 362/241, 362/247, 362/217.06, 362/249.02
• US Class Current: 362/225
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21S 8/033 the surface being a wall or like vertical structure, e.g. building facade
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 17/162 the parts being subjected to traction or compression, e.g. coil springs
• CPC Class Codes: F21V 19/004 by deformation of parts or snap action mountings, e.g. using clips
• CPC Class Codes: F21V 23/0442 activated by means of a sensor, e.g. motion or photodetectors
• CPC Class Codes: F21V 7/00 Reflectors for light sources characterised by cooling arrangements F21V29/505
• CPC Class Codes: F21V 7/0008 providing for indirect lighting
• CPC Class Codes: F21V 7/005 with an elongated shape to cooperate with linear light sources
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting device includes a housing, at least one reflector disposed inside the housing; and a light source unit being disposed inside the housing and emitting light toward the reflector, wherein the light source unit includes a light emitting groove formed therein, the light emitting groove including a basal surface sloped toward the reflector, and wherein a plurality of light emitting devices are disposed sloping along the basal surface in the light emitting groove, and wherein the light emitting groove includes a projection part formed from the basal surface, the projection part blocking the light emitted directly from a plurality of the light emitting devices to the outside of the housing.

Claims

1. A lighting device comprising:

a housing;

at least one reflector disposed inside the housing;

a light source unit disposed inside the housing and emitting light toward the reflector, comprising a plurality of light emitting devices; and

a coupling member coupled to the housing,

wherein the light source unit comprises a light emitting recess and a surface sloped toward the reflector,

wherein the light emitting recess comprises a projection part formed from the surface sloped toward the reflector,

wherein the coupling member comprises a first connection terminal,

wherein the light source unit is electrically coupled to the first connection terminal, and wherein the light source unit further comprises;

a first body having a first coupling unit formed in an upper part thereof and having a first sloping surface formed in a lower part thereof, and wherein the first coupling unit is coupled to the coupling member;

a second body having a second coupling unit formed in an upper part thereof and having a second sloping surface formed in a lower part thereof, and wherein the second coupling unit is coupled to the coupling member;

the plurality of light emitting devices disposed on the first sloping surface and the second sloping surface;

a second connection terminal disposed between the first coupling unit and the second coupling unit electrically coupled to the first connection terminal, and electrically connected to the plurality of light emitting devices; and

a middle body disposed between the first body and the second body, wherein the middle body includes the second connection terminal.

2. The lighting device of claim 1, wherein the reflector has a parabolic surface.

3. The lighting device of claim 1, further comprising a power supply unit being disposed in a space between the reflector and a corner inside the housing, and providing at least one of electric power and a driving signal to the light source unit.

4. The lighting device of claim 1, wherein the light source unit further comprises a substrate, a plurality of light emitting diodes, and an optical structure,

wherein the substrate is disposed on the surface sloped toward the reflector,

wherein the plurality of the light emitting diodes are disposed on the substrate,

wherein the optical structure is disposed on the plurality of the light emitting diodes, and

wherein the projection part blocks a light emitted directly from the plurality of light emitting diodes to an outside of the housing.

5. The lighting device of claim 4, wherein the optical structure comprises at least one of a lens, a diffusion sheet and a phosphor luminescent film (PLF).

6. The lighting device of claim 1, wherein the coupling member comprises an insertion groove formed in a direction of an inner upper surface of the housing,

wherein the first connection terminal is provided in a middle of the insertion groove,

wherein the first connector terminal comprises a first block and a plurality of terminals,

wherein the first block is a pair of female blocks disposed in the middle part of the insertion groove,

wherein the plurality of terminals are formed respectively in each of the pair of female blocks, and

wherein the plurality of terminals formed in one female block among the pair of the female blocks has a symmetric structure and a symmetric polarity with respect to those of the plurality of terminals formed in the other female block.

7. The lighting device of claim 6,

wherein the second connection terminal comprises a second block and a plurality of sockets,

wherein the second block is a pair of male blocks provided in correspondence with the pair of the female blocks, and

wherein the plurality of sockets are formed respectively on the pair of the male blocks, the plurality of sockets are electrically connected to the plurality of terminals.

8. The lighting device of claim 1, wherein the light source unit further comprises a spring disposed between the first body and the second body, and providing an elastic force to the first body and the second body,

wherein the elastic force widens a space between the first body and the second body.

9. The lighting device of claim 1, wherein the light source unit further comprises a limit switch disposed on a first side and a second side of the middle body, connecting and disconnecting electric power supplied to a plurality of the light emitting diodes in accordance with an approach distance between the first body and the middle body and in accordance with an approach distance between the second body and the middle body.

10. A light source device which is able to be placed inside a housing coupled to a coupling member and emit light toward a reflector inside the housing comprising:

a body comprising a first body and a second body;

a spring disposed between the first body and the second body providing an elastic force to the first body and the second body, wherein the elastic force widens a space between the first body and the second body;

a light emitting recess defined by a bottom surface and a side surface and disposed in the first body and the second body;

a light emitting device disposed on the bottom surface; and

a second connection terminal comprising a second block,

wherein the bottom surface is inclined toward the reflector, and wherein the side surface is extended from the bottom surface,

wherein the coupling member comprises a first connection terminal including a first block, and wherein the first block is coupled to the second block, and

wherein the light emitting device is electrically connected to the second block.

11. The light source device of claim 10, wherein the light emitting device comprises a substrate, a plurality of light emitting diodes and an optical structure are disposed in the light emitting groove,

wherein the substrate is disposed on the bottom surface,

wherein the plurality of the light emitting diodes are disposed on the substrate, and wherein the optical structure is disposed on the plurality of the light emitting diodes,

wherein the light emitting recess comprises a projection part formed from the bottom surface, and

wherein the projection part blocks a light emitted directly from the plurality of the light emitting diodes to an outside of the housing.

12. The light source device of claim 11, wherein the optical structure comprises at least one of a lens, a diffusion sheet and a phosphor luminescent film (PLF).

13. The light source device of claim 10, wherein the coupling member comprises an insertion groove formed in a direction of an inner upper surface of the housing,

wherein the first connection terminal is provided in a middle of the insertion groove,

wherein the first block is a pair of female blocks disposed in the middle of the insertion groove,

wherein the plurality of terminals are formed respectively in each of the female blocks, and

wherein the plurality of terminals formed in one female block has a symmetric structure and a symmetric polarity with respect to those of the plurality of terminals formed in a different female block.

14. The light source device of claim 13, wherein the second connection terminal is disposed in an upper part of the body,

wherein the second block is a pair of male blocks provided in correspondence with the pair of the female blocks, and

wherein a plurality of sockets are formed respectively on the pair of male blocks, the plurality of sockets are electrically connected to the plurality of terminals.

15. The light source device of claim 10, wherein the light emitting recess comprises a first light emitting recess and a second light emitting recess, and wherein the light emitting device comprises a first light emitting device and a second light emitting device,

wherein the first body comprising a first coupling unit is coupled to the coupling member, the first light emitting recess, and the first light emitting device,

wherein the second body comprising a second coupling unit is coupled to the coupling member, the second light emitting recess, and the second emitting device.

16. The light source device of claim 15, wherein the body further comprises a middle body,

wherein the middle body is disposed between the first body and the second body, and

wherein the second connection terminal is disposed in the middle body.

17. The light source device of claim 16, further comprising:

a limit switch disposed on a first side and a second side of the middle body, connecting and disconnecting electric power supplied to the first and the second light emitting devices in accordance with an approach distance between the first body and the middle body.

18. A light source device which is able to be placed inside a housing coupled to a coupling member, and emit light toward a reflector which is placed inside the housing comprising:

a first body comprising a first coupler and a first sloping surface;

a second body comprising a second coupler and a second sloping surface;

a middle body disposed between the first body and the second body;

a plurality of light emitting devices disposed on at least one of the first sloping surface and the second sloping surface; and

a first connection terminal electrically connected to the plurality of light emitting devices,

wherein at least one of the first coupler, the second coupler, and the first connection terminal is coupled to the coupling member,

wherein the plurality of light emitting devices are placed to correspond to the reflector,

wherein the first coupler is formed in an upper part of the first body, and the first sloping surface is formed in a lower part of the first body;

wherein the second coupler is formed in an upper part of the second body, and the second sloping surface is formed in a lower part of the second body,

wherein the first connection terminal is disposed in the middle body,

wherein the first connection terminal comprises a first block and a socket,

wherein the coupling member comprises a second connection terminal electrically connecting the first connection terminal and including a second block and a terminal,

wherein the first block is coupled to the second block, and

wherein the socket is connected to the terminal.