Lens and light emitting apparatus having the same
Provided are a lens and a light emitting apparatus comprising the lens. 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. The lens comprises a lens body comprising a first recessed part at a central portion of a top surface thereof and a second recessed part 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 from the substrate.
1. A light emitting apparatus, comprising:
a substrate;
a light emitting device package on the substrate, the light emitting device package comprising:
a package body provided on the substrate;
at least one light emitting device provided on the package body;
a phosphor layer surrounding the light emitting device; and
a sealing resin layer provided on the phosphor layer and the package body; 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 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 at least portion of the sealing resin layer is disposed within the second recess.
14. The light emitting apparatus according to claim 1 , wherein the bottom surface of the lens body is flush with the package body.
15. The light emitting apparatus according to claim 1 , wherein the bottom surface of the lens body is flush with the phosphor layer.
16. The light emitting apparatus according to claim 1 , wherein the bottom surface of the lens body is flush with the light emitting device.
17. The light emitting apparatus according to claim 1 , wherein the package body has a maximum thickness less than that of the lens support.
18. The light emitting apparatus according to claim 1 , wherein the sealing resin layer contacts the substrate and a lateral surface of the package body.
19. The light emitting apparatus according to claim 1 , wherein the phosphor layer has a top surface curved according to an arrangement of the light emitting device.
20. The light emitting apparatus according to claim 1 , wherein the phosphor layer has a flat top surface.
21. The light emitting apparatus according to claim 1 , wherein the phosphor layer has a convex top surface.
22. The light emitting apparatus according to claim 1 , wherein the package body has a groove or a double groove, and the sealing resin layer is disposed within the groove or the double groove.
23. The light emitting apparatus according to claim 1 , wherein a reflection layer is disposed on a top surface of the package body.