Lighting device

Patent metadata

Field	Value
Publication number	US-9927074-B2
Application number	US-201514962991-A
Country	US
Kind code	B2
Filing date	Dec 8, 2015
Priority date	Apr 13, 2012
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A lighting device may be provided that includes: a base; a substrate disposed on the base and comprising a top surface; a plurality of light emitting devices disposed on the top surface of the substrate; a member comprising a housing portion and an inner portion disposed inside the housing portion; and a optical plate disposed on the plurality of light emitting devices and the inner portion, wherein: the housing portion is disposed on the base and coupled to the base, the inner portion comprises a sloped surface forming an obtuse angle with the top surface of the substrate, the housing portion comprises an upper part and a lower part, an outer diameter of the upper part is greater than an outer diameter of the lower part, the housing portion comprises an outer surface, and the housing portion comprises a projection part extending from the outer surface.

First claim

What is claimed is:

1. A lighting device comprising:
a base;
a substrate disposed on the base and comprising a top surface;
a plurality of light emitting devices disposed on the top surface of the substrate;
a housing portion and an inner portion disposed inside the housing portion; and
an optical plate disposed on the plurality of light emitting devices and the inner portion, wherein:
the housing portion is disposed on the base and coupled to the base,
the inner portion comprises a sloped surface forming an obtuse angle with the top surface of the substrate,
the housing portion comprises an upper part and a lower part,
an outer diameter of the upper part is greater than an outer diameter of the lower part,
the housing portion comprises an outer surface,
the outer surface of the housing portion includes a key having a first key portion that extends in a first direction and a second key portion that extends from the first key portion in second direction, and
the housing portion comprises a projection part that extends outwardly from the outer surface of the housing portion,
and the projection part is disposed adjacent to the key.

2. The lighting device of claim 1 , wherein the outer surface of the housing portion has a plurality of recesses, and wherein each of the recesses is formed in a direction from the upper part to the lower part.

3. The lighting device of claim 2 , wherein the recesses comprise a first recess and a second recess, and wherein a first length of the first recess is different from a second length of the second recess.

4. The lighting device of claim 1 , wherein the top surface of the substrate has a circular shape, wherein the inner portion comprises a support portion including the sloped surface and having a cone shape; and wherein a width of the top surface of the substrate is different from a minimum width of the support portion of the inner portion.

5. The lighting device of claim 1 , wherein the housing portion comprises a curved portion disposed between the upper part of the housing portion and the lower part of the housing portion.

6. The lighting device of claim 1 , further comprising a driving part disposed under the substrate and including a circuit board, wherein the substrate has a hole, and wherein the plurality of light emitting devices is electrically connected to the circuit board of the driving part.

7. The lighting device of claim 1 , wherein the substrate comprises a bottom surface and an outer circumference surface disposed between the bottom surface and the top surface, and wherein the outer circumference surface comprises a curved surface and a flat surface.

8. The lighting device of claim 1 , wherein the housing portion has a recess.

9. The lighting device of claim 1 , wherein the housing portion has a hole, wherein the hole has a first width and a second width in a horizontal direction of the housing portion, and wherein the first width is different from the second width.

10. The lighting device of claim 1 , wherein the housing portion has a hole, wherein the hole has a first width in a horizontal direction of the housing portion and a second width in a vertical direction of the housing portion, and wherein the first width is different from the second width.

11. The lighting device of claim 1 , wherein the inner portion comprises an upper part on which the optical plate is disposed.

12. A lighting device comprising:
a base having a recess and a hole;
a projection extending from the base upwardly;
a substrate disposed on the projection and including a top surface;
a plurality of light emitting devices disposed on the top surface of the substrate;
an outer unit and an inner unit disposed in the outer unit,
an optical plate disposed on the plurality of light emitting devices; and
a reflective sheet disposed between the inner unit and the optical plate, wherein:
the outer unit is disposed on the base and coupled to the base,
the outer unit comprises an upper part and a lower part,
an outer diameter of the upper part is greater than an outer diameter of the lower part,
the inner unit comprises an inclined surface forming an obtuse angle with the top surface of the substrate,
the reflective sheet comprises a base sheet and a connecting sheet,
the base sheet has a circular shape and a circular opening formed at a center of the base sheet,
the base sheet comprises an one end and another end faced each other,
the connecting sheet is coupled to the one end of the base sheet,
the base sheet has a recess into which the connecting sheet is inserted,
the outer unit comprises an outer surface, and
the outer unit comprises a projection part extending from the outer surface.

13. The lighting device of claim 12 , wherein the outer surface has a plurality of recesses, and wherein each of the recesses is formed in a direction from the upper part to the lower part.

14. The lighting device of claim 12 , wherein the outer unit has a recess.

15. The lighting device of claim 12 , wherein the inner unit comprises an upper part on which the optical plate is disposed.

16. The lighting device of claim 12 , wherein a maximum width of the recess is the same as a maximum width of the connecting sheet.

17. The lighting device of claim 12 , wherein the connecting sheet comprises a first connecting portion and a second connecting portion connecting to the first connecting portion, and wherein the second connecting portion is closer to the one end of the base sheet than the first connecting portion.

18. The lighting device of claim 17 , wherein a maximum width of the second connecting portion is less than a maximum width of the first connecting portion.

19. The lighting device of claim 12 , wherein an incision maximum length of the incisions is less than a maximum width of the first connecting portion.

20. The lighting device of claim 12 , wherein an incision maximum length of the incisions is same as a minimum width of the second connecting portion.

21. The lighting device of claim 12 , wherein the top surface of the substrate has a circuit shape, wherein the inner unit comprises a support part including the inclined surface and having a cone shape; and wherein a width of the top surface of the substrate is different from a minimum width of the support part of the inner unit.

22. The lighting device of claim 12 , wherein the outer unit comprises a curved part disposed between the upper part of the outer unit and the lower part of the outer unit.

23. The lighting device of claim 12 , further comprising a driving part disposed under the substrate and including a circuit board, wherein the substrate has a hole, wherein the plurality of light emitting devices is electrically connected to the circuit board of the driving part.

24. The lighting device of claim 12 , wherein the substrate comprises a bottom surface and an outer circumference surface disposed between the bottom surface and the top surface, and wherein the outer circumference surface comprises a curved surface and a flat surface.

25. A lighting device comprising:
a base;
a substrate disposed on the base and comprising a top surface;
a plurality of light emitting devices disposed on the top surface of the substrate;
a housing portion and an inner portion disposed inside the housing portion; and
an optical plate disposed on the plurality of light emitting devices and the inner portion, wherein:
the housing

Assignees

• Lg Innotek Co Ltd

Inventors

• Kim Jin Wook
• Chun Jung Oh
• Hong Sang Jun
• Jeon Ji Hwan

Classifications

• F21V7/18

  with provision for folding or collapsing · CPC title

• F21V15/01

  Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04}) · CPC title

• F21V17/04

  the fastening being onto or by the light source · CPC title

• F21K9/00 Primary

  Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers · CPC title

• F21V29/70

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title