Lighting device

• US 20110043132A1
• 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 8,449,138 B2
• Time in Patent Office: Days
• US Class Current: 315/294
• 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 including a housing, 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, at least one reflector coupled between an inner wall surface of the housing and an outer wall surface of the coupling member; and a light source unit having an upper part thereof attachable to and removable from the coupling member by using the insertion groove, having a second connection terminal provided in the upper part thereof, the second connection terminal being electrically connected to the first connection terminal when connected to the coupling member, and having a lower part thereof emitting light toward the reflector.

Claims

1. A lighting device comprising:

a housing;

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; and

at least one reflector coupled between an inner wall surface of the housing and an outer wall surface of the coupling member,

wherein the coupling member is coupled to the light unit source through the insertion groove in an attachable and removable manner.

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

3. The lighting device of claim 2, 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 when the light source unit is coupled to the coupling member.

4. The lighting device of claim 1, wherein at least one first groove is formed on the outer wall surface of the coupling member, and wherein at least one second groove is formed on the inner wall surface of the housing, and wherein a first side of the reflector is attachable to and removable from the inner wall surface of the housing by using the second groove, and wherein a second side of the reflector is attachable to and removable from the outer wall surface of the coupling member by using the first groove.

5. The lighting device of claim 1, wherein the first connection terminal comprises a first female block and a second female block, wherein the first female block comprises a pair of a first terminal and a second terminal and a pair of a third terminal and a fourth terminal, and wherein the second female block comprises a pair of a fifth terminal and a sixth terminal and a pair of a seventh terminal and an eighth terminal.

6. A lighting device comprising:

a housing;

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;

at least one reflector coupled between an inner wall surface of the housing and an outer wall surface of the coupling member; and

a light source unit having an upper part thereof attachable to and removable from the coupling member by using the insertion groove, having a second connection terminal provided in the upper part thereof, the second connection terminal being electrically connected to the first connection terminal when connected to the coupling member, and having a lower part thereof emitting light toward the reflector.

7. The lighting device of claim 6, wherein at least one first groove is formed on the outer wall surface of the coupling member, and wherein at least one second groove is formed on the inner wall surface of the housing, and wherein a first side of the reflector is attachable to and removable from the inner wall surface of the housing by using the second groove, and wherein a second side of the reflector is attachable to and removable from the outer wall surface of the coupling member by using the first groove.

8. The lighting device of claim 6, wherein the reflector has a parabolic surface.

9. The lighting device of claim 8, 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 when the light source unit is coupled to the coupling member.

10. The lighting device of claim 6, wherein the first connection terminal comprises at least one pair of 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, and 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 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.

11. The lighting device of claim 6, wherein the first connection terminal comprises a first female block and a second female block, and wherein a pair of a first terminal and a second terminal and another pair of a third terminal and a fourth terminal are formed in the first female block, and wherein a pair of a fifth terminal and a sixth terminal and another pair of a seventh terminal and an eighth terminal are formed in the second female block, and wherein the second connection terminal comprises a first male block and a second male block, and wherein a pair of a first socket and a second socket and another pair of a third socket and a fourth socket are formed on the first male block, and wherein a pair of a fifth socket and a sixth socket and another pair of a seventh socket and an eighth socket are formed on the second male block, and wherein the first terminal and the second terminal comprise a first polarity and a second polarity respectively, and wherein the seventh terminal and the eighth terminal comprise the second polarity and the first polarity respectively, and wherein the third terminal and the fourth terminal comprise the first polarity and the second polarity respectively, and wherein the fifth terminal and the sixth terminal comprise the second polarity and the first polarity respectively.

12. The lighting device of claim 6, 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.

13. The lighting device of claim 12, further comprising 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.

14. The lighting device of claim 12, 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.

15. The lighting device of claim 12, further comprising a coupling cap being disposed at at least one end of both ends of each of the first body, the second body and the middle body, being attachable to or removable from the first body, the middle body and the second body, and coupling the first body and the second body to each other to rotate such that a spaced distance between the first body and the middle body and a spaced distance between the second body and the middle body can be changed.

16. The lighting device of claim 12, wherein the first body comprises a first light emitting groove using the first sloping surface as a basal surface, and wherein the second body comprises a second light emitting groove using the second sloping surface as a basal surface, and wherein a plurality of light emitting diodes is provided in the first light emitting groove along the first sloping surface, and wherein a plurality of light emitting diodes is provided in the second light emitting groove along the second sloping surface, and wherein the first light emitting groove and the second light emitting groove comprise a projection part formed in the first light emitting groove and the second light emitting groove respectively, the projection part blocking the light emitted directly from the plurality of the light emitting diodes to the outside of the housing.

17. The lighting device of claim 12, wherein a plurality of third grooves are formed on an inner wall surface of the insertion groove, and wherein projections are formed in an upper part of the first coupling unit and in an upper part of the second coupling unit, and wherein the projections are inserted into the third grooves so that the light source unit is coupled to the coupling member.

18. The lighting device of claim 12, wherein, when the first coupling unit and the second coupling unit are coupled to the coupling member, there is a contact surface formed by causing the coupling unit to be contact with the insertion groove in order to transfer heat generated from the light source unit to the coupling unit.

19. A lighting device comprising a housing and a light source unit, wherein the lighting device has an improved heat radiating effect, and wherein the housing comprises a coupling unit in which an insertion groove is formed, wherein an inner wall surface of the insertion groove is extended by the length of the light source unit, and wherein the light source unit comprises a light emitting groove contacting directly with a light source and having the light source seated therein, and comprises a coupling unit coming in surface contact with the inner wall surface of the coupling member.