LIGHTING DEVICE AND METHOD OF ASSEMBLING THE SAME

• US 20110194282A1
• Filed: 04/18/2011
• Published: 08/11/2011
• Est. Priority Date: 06/23/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hyunha, Paik, Dongki
• Granted Patent: US 8,042,969 B2
• Time in Patent Office: Days
• US Class Current: 362/245
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 17/005 with keying means, i.e. for enabling the assembling of component parts in distinctive positions, e.g. for preventing wrong mounting
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 5/007 Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane combination of two or more refractors F21V5/008
• CPC Class Codes: F21V 5/04 of lens shape
• 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 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting device and a method of assembling the same are disclosed herein. The lighting device may include a lens assembly having a plurality of condensing lenses, a reflector having a plurality of openings, and a light emitting module having a plurality of LEDs. The condensing lenses, the plurality of openings, and the LEDs may be positioned to correspond to each other. The reflector may reflect light emitted from the light emitting elements to maximize light distribution efficiency of the lighting device.

Claims

1. A lighting device comprising:

a housing having a prescribed shape;

a light emitting module provided in the housing including a substrate having a plurality of LEDs mounted thereon;

a reflector having a first partition and a second partition, wherein the first partition is a first wall having a first and second surface and at least one of the first or second surface being inclined at a first prescribed angle, and the second partition is a second wall having a first and second surface and at least one of the first or second surface of the second wall being inclined at a second prescribed angle, wherein

the first partition is provided between a first group of LEDs and a second group of LEDs, and the second partition provided between the second group of LEDs and a third group of LEDs; and

a lens assembly positioned on the reflector.

2. The lighting device of claim 1, wherein a height of the first partition is different from a height of the second partition.

3. The lighting device of claim 1, further comprising a plurality of spokes attached to the first partition and the second partition.

4. The lighting device of claim 1, wherein the first and second prescribed angles are different angles.

5. The lighting device of claim 1, wherein the second group of LEDs has more LEDs than the first group of LEDs.

6. The lighting device of claim 1, wherein the third group of LEDs has more LEDs than the second group of LEDs.

7. The lighting device of claim 1, wherein the lens assembly includes a plurality of lenses positioned to correspond to the plurality of LEDs of the light emitting module, wherein

each of the plurality of lenses have a side surface, and

the inclined surface of the first or second partition of the reflector is configured to be positioned adjacent to the side surface of each of the plurality of lenses.

8. The lighting device of claim 7, wherein each of the side surfaces of the plurality of lenses are inclined at an angle that corresponds to the prescribed angle of the inclined surface of the corresponding partition.

9. The lighting device of claim 1, wherein the housing is configured to dissipate heat generated by the light emitting module.

10. The lighting device of claim 1, wherein the lens assembly includes a plurality of condensing lenses provided on a surface of the lens assembly and configured to protrude toward the LEDs, and wherein each of the plurality of condensing lenses includes a recessed portion at a distal end of each condensing lens.

11. The lighting device of claim 10, wherein the plurality of condensing lenses are positioned to form a plurality of concentric rows of condensing lenses.

12. The lighting device of claim 11, wherein the concentric rows of condensing lenses are positioned to form circular rows of condensing lenses.

13. The lighting device of claim 11, wherein at least one of the first or second partition is positioned between two of the plurality of concentric rows of condensing lenses.

14. The lighting device of claim 11, wherein the first and second partitions are positioned a prescribed distance from the plurality of condensing lenses.

15. The lighting device of claim 11, wherein at least one of the first or second partitions are positioned adjacent to one of the plurality of concentric rows of condensing lenses.

16. The lighting device of claim 1, further comprising a plurality of third partitions, wherein each of the third partitions are connected to the first partition and the second partition.

17. The lighting device of claim 16, wherein the plurality of third partitions are positioned between the LEDs in a radial direction.

18. The lighting device of claim 1, wherein the first and second partitions have a triangular cross-section.

19. The lighting device of claim 7, wherein the lens assembly includes one or more alignment pins positioned on one or more of the plurality of condensing lenses and one or more alignment holes positioned on the reflector and the light emitting module, wherein the one or more alignment pins are positioned to correspond to a position of the one or more alignment holes.

20. A lighting device comprising:

a light emitting module having a plurality of LEDs mounted thereon;

a lens assembly including a plurality of condensing lenses positioned to correspond to the plurality of LEDs, wherein the condensing lenses are formed to protrude toward the corresponding LEDs; and

a reflector provided between the light emitting module and the lens assembly, wherein the reflector includes

a plurality of openings positioned to correspond to the plurality of LEDs and condensing lenses, and

one or more partitions positioned between the plurality of openings, wherein the one or more partitions are formed to protrude towards the lens assembly.