Lighting device

• US 20110044023A1
• Filed: 08/19/2010
• Published: 02/24/2011
• 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: HONG, Sang Jun, Kim, Kwang Soo, Kong, Kyung Il, Kim, Hwayoung
• Granted Patent: US 8,534,865 B2
• Time in Patent Office: Days
• US Class Current: 362/84
• 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; and

a light source unit being disposed inside the housing and emitting light toward the reflector,

wherein the light source unit comprises a light emitting groove formed therein, the light emitting groove comprising 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 comprises 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.

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 a substrate, a plurality of light emitting diodes and an optical structure are disposed in the light emitting groove, and wherein the substrate is disposed on the basal surface, and wherein the plurality of the light emitting diodes are disposed sloping on the substrate along the basal surface, and wherein the optical structure is disposed on the plurality of the light emitting diodes.

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, further comprising a coupling member being coupled to an inner upper surface of the housing, having an insertion groove formed in the middle part thereof in a direction of the inner upper surface of the housing, and having a first connection terminal provided in the middle of the insertion groove,

wherein the first connection terminal comprises at least one pair of the female blocks disposed in the middle part of the insertion groove,

and wherein at least one pair of terminals are formed respectively in the one pair of the female blocks,

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

7. The lighting device of claim 6, comprising a second connection terminal which is disposed in the upper part of the coupling member and is electrically connected to the first connection terminal, wherein the second connection terminal comprises at least one pair of male blocks provided in correspondence with the one pair of the female blocks, and wherein and wherein at least one pair of sockets are formed respectively on the one pair of the male blocks such that the sockets is in correspondence with and are electrically connected to at least the one pair of the terminals formed respectively in the one pair of the female blocks.

8. The lighting device of claim 1, wherein the light source unit comprises:

a first body having a first coupling unit formed in an upper part thereof, the first coupling unit attachable to and removable from the coupling member by using the insertion groove, and having a first sloping surface formed in a lower part thereof;

a second body having a second coupling unit formed in an upper part thereof, the second coupling unit attachable to and removable from the coupling member by using the insertion groove, and having a second sloping surface formed in a lower part thereof;

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

a plurality of light emitting diodes mounted on the first sloping surface and the second sloping surface respectively,

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

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

10. The lighting device of claim 8, wherein the light source unit further comprises a limit switch being disposed on both sides 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.

11. A light source device which is able to be placed inside a housing and emits light toward a reflector which is placed inside the house,

wherein a light emitting groove is formed, the light emitting groove comprising 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 comprises 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.

12. The light source device of claim 11, wherein a substrate, a plurality of light emitting diodes and an optical structure are disposed in the light emitting groove, and wherein the substrate is disposed on the basal surface, and wherein the plurality of the light emitting diodes are disposed sloping on the substrate along the basal surface, and wherein the optical structure is disposed on the plurality of the light emitting diodes.

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

14. The light source device of claim 11, further comprising a coupling member being coupled to an inner upper surface of the housing, having an insertion groove formed in the middle part thereof in a direction of the inner upper surface of the housing, and having a first connection terminal provided in the middle of the insertion groove,

wherein the first connection terminal comprises at least one pair of the female blocks disposed in the middle part of the insertion groove,

and wherein at least one pair of terminals are formed respectively in the one pair of the female blocks,

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

15. The light source device of claim 14, comprising a second connection terminal which is disposed in the upper part of the coupling member and is electrically connected to the first connection terminal, wherein the second connection terminal comprises at least one pair of male blocks provided in correspondence with the one pair of the female blocks, and wherein and wherein at least one pair of sockets are formed respectively on the one pair of the male blocks such that the sockets is in correspondence with and are electrically connected to at least the one pair of the terminals formed respectively in the one pair of the female blocks.

16. The light source device of claim 11, wherein the light source unit comprises:

a first body having a first coupling unit formed in an upper part thereof, the first coupling unit attachable to and removable from the coupling member by using the insertion groove, and having a first sloping surface formed in a lower part thereof;

a second body having a second coupling unit formed in an upper part thereof, the second coupling unit attachable to and removable from the coupling member by using the insertion groove, and having a second sloping surface formed in a lower part thereof;

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

a plurality of light emitting diodes mounted on the first sloping surface and the second sloping surface respectively,

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

17. The light source device of claim 16, wherein the light source unit further comprises a spring being disposed between the first body and the second body, and providing an elastic force to the first body and the second body, the elastic force widening a space between the first body and the second body.

18. The light source device of claim 16, wherein the light source unit further comprises a limit switch being disposed on both sides 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.