Lens and light emitting apparatus having the same

• US 8,506,122 B2
• Filed: 06/25/2012
• Issued: 08/13/2013
• Est. Priority Date: 11/19/2009
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Bak, Gyu Hyeong, Lee, Sang Won
• Primary Examiner(s): Ton, Anabel
• Application Number:
  US13/531,731
• Publication Number:
  US 20120262905A1
• Time in Patent Office: 414 Days
• Field of Search: 362/311.02, 362/311.01, 362/249.02, 362/308, 362/296.05, 362/800, 362/311.06, 362/257, 359/718, 359/719
• US Class Current: 362/257
• CPC Class Codes: F21V 17/101 permanently, e.g. welding, gluing or riveting
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0066 in the form of an LED array
• CPC Class Codes: G02B 19/0071 adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

Provided is a light emitting apparatus. The light emitting apparatus comprises a substrate; a light emitting device package on the substrate; and a lens supported by the substrate, the lens being disposed on the light emitting device package, wherein the lens comprises a lens body having a first recess at a central portion of a top surface thereof, a second recess at a central portion of a bottom surface thereof, and a lens support disposed on the bottom surface of the lens body to support the lens body such that the bottom surface of the lens body is spaced apart from the substrate.

Claims

1. A light emitting apparatus comprising:

a substrate;

a light emitting device package on the substrate; and

a lens supported by the substrate, the lens being disposed on the light emitting device package,

wherein the lens comprises a lens body having a first recess at a central portion of a top surface thereof, a second recess at a central portion of a bottom surface thereof, and a lens support disposed on the bottom surface of the lens body to support the lens body such that the bottom surface of the lens body is spaced apart from the substrate.

2. The light emitting apparatus according to claim 1, wherein a ratio of a maximum depth of the first recess to a maximum thickness of the lens body ranges from about 0.06 to about 0.1, and a ratio of a maximum depth of the second recess to a maximum thickness of the lens body 31 ranges from about 0.5 to 0.75.

3. The light emitting apparatus according to claim 1, wherein a ratio of a maximum depth of the second recess to a maximum depth of the first recess ranges from about 6.25 to about 10.

4. The light emitting apparatus according to claim 1, wherein a ratio of a maximum width of the first recess to a maximum width of the lens body ranges from about 0.18 to about 0.3, and a ratio of a maximum width of the second recess to a maximum width of the lens body ranges from about 0.14 to about 0.25.

5. The light emitting apparatus according to claim 1, wherein a ratio of a maximum width of the second recess to a maximum width of the first recess ranges from about 0.7 to about 0.94.

6. The light emitting apparatus according to claim 1, wherein at least portion of the light emitting device package is disposed within the second recess.

7. The light emitting apparatus according to claim 1, wherein the first recess and the second recess vertically overlap each other.

8. The light emitting apparatus according to claim 1, wherein a plurality, of lens supports spaced apart from each other is provided.

9. The light emitting apparatus according to claim 8, wherein at least three or more lens supports are provided.

10. The light emitting apparatus according to claim 1, wherein the lens body is flat at a circumference of a top surface thereof.

11. The light emitting apparatus according to claim 1, wherein the lens support adheres and is fixed to the substrate.

12. The light emitting apparatus according to claim 1, wherein a concave-convex part or roughness is disposed on the bottom surface of the lens body except for a portion where the second recess is formed.

13. The light emitting apparatus according to claim 1, wherein the light emitting device package comprises a package body on the substrate, at least one light emitting device on the package body, a phosphor layer surrounding the light emitting device, and a sealing resin layer on the phosphor layer and the package body.

14. The light emitting apparatus according to claim 13, wherein at least portion of the sealing resin layer is disposed within the second recess.

15. The light emitting apparatus according to claim 13, wherein the bottom surface of the lens body is flush with the package body.

16. The light emitting apparatus according to claim 13, wherein the bottom surface of the lens body is flush with the phosphor layer.

17. The light emitting apparatus according to claim 13, wherein the bottom surface of the lens body is flush with the light emitting device.

18. The light emitting apparatus according to claim 13, wherein the package body has a maximum thickness less than that of the lens support.

19. The light emitting apparatus according to claim 13, wherein the sealing resin layer contacts the substrate and a lateral surface of the package body.

20. The light emitting apparatus according to claim 13, wherein the phosphor layer has a top surface curved according to an arrangement of the light emitting device.