Light emitting device module

• US 9,285,083 B2
• Filed: 04/13/2011
• Issued: 03/15/2016
• Est. Priority Date: 05/12/2010
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Lee, GunKyo
• Primary Examiner(s): Husar, Stephen F
• Application Number:
  US13/085,945
• Publication Number:
  US 20110280012A1
• Time in Patent Office: 1,798 Days
• Field of Search: 362/218, 362/227, 362/231, 362/267
• US Class Current: 1/1
• 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: F21V 31/00 Gas-tight or water-tight arrangements
• 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]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H05K 2201/0125 Shrinkable, e.g. heat-shrinkable polymer
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 3/281 by means of a preformed insulating foil H05K3/284 takes precedence

Abstract

A light emitting device module is provided comprising a light emitting device package, a printed circuit board on which the light emitting device package is arranged and a sealing member that surrounds the light emitting device package and the printed circuit board, wherein a predetermined space is formed between the light emitting device package and the printed circuit board and the sealing member.

Claims

1. A light emitting device module comprising:

a light emitting device package having an upper surface and a lateral surface;

a printed circuit board on which the light emitting device package is arranged; and

a sealing member that surrounds the light emitting device package and the printed circuit board, the sealing member being a sheet,

wherein the sealing member directly contacts the upper surface and an upper portion of the lateral surface and extends downward while directly contacting the lateral surface of the light emitting device package, and

wherein the sealing member extends from the upper portion of the lateral surface of the light emitting device package to a surface of the printed circuit board between the light emitting device package and another light emitting device package at a prescribed distance from a lower portion of the light emitting device package to form a prescribed space between the light emitting device package, the printed circuit board and the sealing member.

2. The light emitting device module of claim 1, wherein the prescribed space is filled with air.

3. The light emitting device module of claim 1, wherein the prescribed space is formed at a corner formed between the light emitting device package and the printed circuit board.

4. The light emitting device module of claim 1, wherein the sealing member surrounds an upper surface of the printed circuit board on which the light emitting device package is arranged and a bottom surface of the printed circuit board.

5. The light emitting device module of claim 4, wherein the the sealing member is provided to seal both ends of the printed circuit board or a central portion of the printed circuit board.

6. The light emitting device module of claim 1, wherein a plurality of light emitting device packages are arranged on the printed circuit board in a series connection or parallel connection, and

wherein the sealing member seals at least two light emitting devices from a first light emitting device package to a last light emitting device package among the plurality of light emitting device packages arranged on the printed circuit board.

7. The light emitting device module of claim 1, wherein the sealing member is formed of a transparent material.

8. The light emitting device module of claim 1, wherein the sealing member is formed of a colored material.

9. The light emitting device module of claim 1, wherein the sealing member has a rounded portion near a corner of the light emitting device package which is adjacent to the printed circuit board, wherein the rounded portion has a curvature.

10. The light emitting device module of claim 9, wherein the sealing member includes

a first surface contacting the light emitting device package and the printed circuit board, and

a second surface opposite to the first surface, the second surface exposed to an outside,

wherein the first surface has a first curvature and the second surface has a second curvature.

11. The light emitting device module of claim 10, wherein the first curvature of the first surface is the same as the second curvature of the second surface.

12. The light emitting device module of claim 1, wherein the sealing member has a length longer than the printed circuit board.

13. The light emitting device module of claim 1, wherein the sealing member contains various colors of phosphors.

14. The light emitting device module of claim 1, wherein the sealing member is formed of a material that contracts in response to heat, the sheet being configured to contract from a tubular shape to surround the light emitting device package and the printed circuit board.

15. The light emitting device module of claim 1, wherein a portion of the sealing member extends at a prescribed curvature from the lateral surface of the light emitting device package to the surface of the printed circuit board to form the prescribed space.

16. The light emitting device module of claim 1, wherein the sealing member contacts the surface of the printed circuit board around the light emitting device packages to seal the light emitting device package.

17. The light emitting device module of claim 16, wherein a plurality of the light emitting device packages are provided on the printed circuit board, and the sealing member contacts the surface of the printed circuit board around prescribed ones of the plurality of light emitting device packages to seal each of the prescribed ones of the light emitting device packages.

18. The light emitting device module of claim 1, wherein the printed circuit board is provided in an enclosure for an illumination device, the enclosure having a tubular shape and the sealing member being provided a prescribed distance from an inner surface of the enclosure.

19. A lighting system comprising:

a light emitting device module that includes a light emitting device package having an upper surface and a lateral surface, a printed circuit board on which the light emitting device package is arranged and a sealing member that surrounds the light emitting device package and the printed circuit board, the sealing member being a sheet; and

a power control module to supply the power to the light emitting device module,

wherein the sealing member directly contacts the upper surface and an upper portion of the lateral surface and extends downward while directly contacting the lateral surface of the light emitting device package, and

wherein the sealing member extends from the upper portion of the lateral surface of the light emitting device package to a surface of the printed circuit board between the light emitting device package and another light emitting device package at a prescribed distance from a lower portion of the light emitting device package to form a prescribed space between the light emitting device package, the printed circuit board and the sealing member.

20. A light emitting device module comprising:

a light emitting device package having an upper surface and a lateral surface;

a printed circuit board on which the light emitting device package is arranged; and

a sealing member that surrounds the light emitting device package and the printed circuit board, the sealing member being a sheet,

wherein the sealing member directly contacts the upper surface and an upper portion of the lateral surface to cover the light emitting device package,

wherein the sealing member extends from the upper portion of the lateral surface of the light emitting device package to a surface of the printed circuit board between the light emitting device package and another light emitting device package at a prescribed distance from the light emitting device package to form a prescribed space between the light emitting device package, the printed circuit board and the sealing member, and

wherein the sheet has an outer surface facing away from the light emitting device package and an inner surface that faces the light emitting device package and directly contacting the light emitting device package, the outer surface and the inner surface being parallel to each other such that a shape of the outer surface corresponds to a shape of the inner surface.