Lighting device

• US 9,316,363 B2
• Filed: 10/09/2013
• Issued: 04/19/2016
• Est. Priority Date: 11/12/2010
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Lee, Sang Hoon, Shin, Hyun Ha, Woo, Im Je
• Primary Examiner(s): NEILS, PEGGY A
• Application Number:
  US14/049,977
• Publication Number:
  US 20140036498A1
• Time in Patent Office: 923 Days
• Field of Search: 362/217.1, 362/217.12, 362/217.13, 362/225, 362/235, 362/223, 362/217.05
• US Class Current: 1/1
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21S 2/005 of modular construction
• 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 8/04 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: F21S 8/043 mounted by means of a rigid support, e.g. bracket or arm
• 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 17/10 characterised by specific fastening means or way of fastening F21V17/02 - F21V17/08 take precedence
• CPC Class Codes: F21V 17/104 using feather joints, e.g. tongues and grooves, with or without friction
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 3/04 characterised by materials, surface treatments or coatings
• CPC Class Codes: F21V 7/0083 Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane combination of two or more reflectors F21V7/0025
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/00 Combination of light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133602 Direct backlight
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133628 with cooling means

Abstract

A lighting device may be provided that includes a light emitter including a plurality of LEDs; a reflective plate disposed on the light emitter; a diffuser plate disposed in a direction in which light emitted from the LED is irradiated; a case including the light emitter disposed therein and including a bottom plate and a side wall extending from both side ends of the bottom plate; and a connecting member extending from the side wall of the case and including a bracket coupler on at least one side thereof. The light emitter is disposed between the bottom plate of the case and the diffuser plate.

Claims

1. A lighting device comprising:

a plurality of single lighting modules that includes;

a light emitter that includes a substrate and a plurality of lighting emitting devices disposed on the substrate;

a reflective plate that is disposed on the substrate of the light emitter;

a heat radiator that contacts a bottom surface of the substrate of the light emitter;

a case that includes a bottom plate and a side wall extending from both side ends of the bottom plate;

a diffuser plate that is disposed on the light emitter and that is coupled to the side wall of the case; and

a connecting member that extends from the side wall of the case and that includes a bracket coupler on at least one side of the connecting member,

wherein the light emitter is disposed between the bottom plate of the case and the diffuser plate,

wherein at least one power supply controller is located in a space formed between the plurality of single lighting modules,

wherein the bottom plate and the side wall of the case are spaced apart from the heat radiator.

2. The lighting device of claim 1, wherein the heat radiator comprises a heat radiating sheet.

3. The lighting device of claim 1, wherein the light emitter is disposed closer to the diffuser plate than to the bottom plate of the case.

4. The lighting device of claim 1, wherein the connection member further includes a louver or a top plate, and wherein the bracket coupler is disposed at an end of the louver or the top plate.

5. The lighting device of claim 4, wherein the louver or the top plate is inclined more outward from the case than the side wall.

6. The lighting device of claim 4, wherein the space is formed by the louvers in which the bracket couplers are formed and by the side walls connected to the louvers.

7. The lighting device of claim 1, wherein the side wall of the case comprises a first side wall and a second side wall opposite to the first side wall, wherein the connection member comprises a first connector that extends from the first side wall and a second connector that extends from the second side wall, and wherein at least one of the first connector or the second connector comprises the bracket coupler.

8. The lighting device of claim 1, wherein the diffuser plate comprises at least one paraboloid that is convex in a traveling direction of the light emitted from the light emitter.

9. The lighting device of claim 1, wherein the diffuser plate comprises a flat surface on which the light emitted from the light emitter is incident and a convex surface through which the light emitted from the light emitter is emitted.

10. The lighting device of claim 1, wherein the reflective plate comprises a bottom reflective plate and a side reflective plate extending from the bottom reflective plate and having an inclination.

11. The lighting device of claim 10, wherein the reflective plate further comprises a fixing protrusion extending from the side reflective plate, and wherein the case includes a coupling recess coupled to the fixing protrusion.

12. The lighting device of claim 10, wherein the side reflective plate of the reflective plate has a first inclination, wherein the reflective plate further comprises an auxiliary reflective plate extending from the side reflective plate and having a second inclination, and wherein the first inclination is different from the second inclination.

13. The lighting device of claim 12, wherein the reflective plate further comprises a fixing protrusion extending from the auxiliary reflective plate, and wherein the case further comprises a coupling recess coupled to the fixing protrusion.

14. The lighting device of claim 1, wherein, the power supply controller includes a projection formed in a lower end of the power supply controller and the case includes a power supply controller coupling recess formed at a boundary between the side wall and the bottom plate of the case.

15. The lighting device of claim 14, wherein the projection is pushed in a sliding way into the power supply controller coupling recess.

16. A lighting device comprising:

a light emitter that includes a plurality of lighting emitting devices;

a reflective plate being disposed on the light emitter and that includes a bottom reflective plate, a side reflective plate that extends from the bottom reflective plate and has an inclination, and a fixing protrusion that extends from the side reflective plate;

a diffuser plate disposed in a direction in which light emitted from the lighting emitting device is irradiated;

a case that includes the light emitter disposed therein and that includes a bottom plate and a side wall extending from the bottom plate, wherein the side wall has a recess in which the fixing protrusion and one end of the diffuser plate are disposed;

a connecting member that extends from the side wall of the case and that includes a bracket coupler on at least one side of the connecting member, and

a power supply controller contacting an outer lateral surface of at least one side wall of the case.

17. The lighting device of claim 16, wherein the diffuser plate comprises a locking part, and wherein at least one of the reflective plate or the case comprises a fastener coupled to the locking part.

18. The lighting device of claim 16, wherein holes are formed through the side wall and holes are also formed through the power supply controller, wherein the holes of the side wall and the holes of the power supply controller are aligned with each other, and wherein the case can be coupled to the power supply controller by allowing a screw or a pin to pass through the holes formed both in the side wall and in the power supply controller.

19. A lighting device comprising:

a plurality of single lighting modules that includes;

a light emitter that includes a plurality of lighting emitting devices;

a reflective plate disposed on the light emitter;

a diffuser plate being disposed in a direction in which light emitted from the lighting emitting device is irradiated and that includes a locking hole;

a case that includes the light emitter disposed therein and that includes a bottom plate and a side wall extending from both side ends of the bottom plate; and

a connecting member that extends from the side wall of the case and that includes a bracket coupler on at least one side end of the connecting member,

wherein the reflective plate includes a fastener having a protrusion coupled to the locking hole of the diffuser plate, and

wherein at least one power supply controller is located in a space formed between the plurality of single lighting modules.

20. The lighting device of claim 19, wherein the side wall of the case has a recess, and wherein one end of the reflective plate is disposed in the recess of the side wall of the case.