Light emitting device package and backlight unit using the same
View Patent ↗A light emitting device package including light emitting devices, and optical lenses respectively disposed over the light emitting devices. Further, a respective optical lens includes an extending member extending from a body of the respective optical lens, and including a first portion laterally extending in a first direction substantially perpendicular to the central axis of the respective light emitting device, and a second portion extending towards the substrate in a second direction substantially parallel with the central axis of the respective light emitting device. A vertical cross section of the second portion is substantially symmetrical with respect to an axis that is spaced apart in the first direction from and substantially parallel with the central axis of the respective light emitting device.
1. A light emitting device package, comprising:
a plurality of light emitting devices on a substrate; and
a plurality of optical lenses respectively disposed over the plurality of light emitting devices, the plurality of respective optical lenses comprising a recessed portion centrally disposed on a top surface of a respective optical lens,
wherein the recessed portion inwardly recesses towards a respective light emitting device,
wherein an upper surface of the respective light emitting device is below a bottom surface of the respective optical lens,
wherein a central axis of the respective light emitting device substantially aligns with a central axis of the recessed portion of the respective optical lens,
wherein the respective optical lens includes:
a body; and
an extending member extending from the body of the respective optical lens,
wherein the extending member comprises a first portion laterally extending in a first direction substantially perpendicular to the central axis of the respective light emitting device, and a second portion extending towards the substrate in a second direction substantially parallel with the central axis of the respective light emitting device,
wherein the first portion is separated from a top surface of the substrate,
wherein the first portion includes a laterally outermost surface of the respective optical lens, a first surface facing the top surface of the substrate, and a second surface opposite to the first surface,
wherein the second portion is disposed between the top surface of the substrate and a plane including the first surface of the first portion, and
wherein a vertical cross section of the second portion is substantially symmetrical with respect to an axis that is spaced apart in the first direction from and substantially parallel with the central axis of the respective light emitting device.
2. The light emitting device package of claim 1 , wherein the second portion connects to the top surface of the substrate.
3. The light emitting device package of claim 1 , wherein light is configured to be emitted from the respective light emitting device towards the respective optical lens to pass through the respective optical lens to an outside of the respective optical lens.
4. The light emitting device package of claim 1 , wherein the recessed portion is part of the entire top surface of the respective optical lens.
5. The light emitting device package of claim 1 , wherein the first portion is directly connected to the second portion.
6. The light emitting device package of claim 1 , wherein only the second portion contacts the top surface of the substrate.
7. The light emitting device package of claim 1 , wherein the second portion includes a bottommost surface of the respective optical lens.
8. The light emitting device package of claim 1 , wherein the first portion is spaced apart from the top surface of the substrate.
9. The light emitting device package of claim 1 , wherein the second portion extends up to the top surface of the substrate.
10. The light emitting device package of claim 1 , wherein at least one of the first portion or the second portion is disposed in a lower region of the respective optical lens with respect to the central axis of the respective light emitting device.
11. The light emitting device package of claim 1 , wherein the first and second portions are integral with the respective optical lens.
12. The light emitting device package of claim 1 , wherein the respective optical lens further includes a round portion outside of the recessed portion.
13. The light emitting device package of claim 12 , wherein the recessed portion is connected to a circumference of the round portion.
14. The light emitting device package of claim 3 , wherein the light is configured to be emitted directly to the outside of the respective optical lens without being first reflected by the respective optical lens.
15. The light emitting device package of claim 1 , wherein the recessed portion includes a curved or slanting shape.
16. The light emitting device package of claim 1 , further comprising a hollow portion into or under which the respective light emitting device is disposed.
17. A light unit, comprising:
a plurality of light emitting devices on a substrate;
a plurality of optical lenses respectively disposed over the plurality of light emitting devices, the plurality of respective optical lenses comprising a recessed portion centrally disposed on a top surface of a respective optical lens, wherein the recessed portion inwardly recesses towards a respective light emitting device; and
a diffusion plate disposed above the plurality of respective optical lenses,
wherein an upper surface of the respective light emitting device is below a bottom surface of the respective optical lens,
wherein a central axis of the respective light emitting device substantially aligns with a central axis of the recessed portion of the respective optical lens,
wherein the respective optical lens includes:
a body; and
an extending member extending from the body of the respective optical lens,
wherein the extending member comprises a first portion laterally extending in a first direction substantially perpendicular to the central axis of the respective light emitting device, and a second portion extending towards the substrate in a second direction substantially parallel with the central axis of the respective light emitting device,
wherein the first portion is separated from a top surface of the substrate,
wherein the first portion includes a laterally outermost surface of the respective optical lens, a first surface facing the top surface of the substrate, and a second surface opposite to the first surface,
wherein the second portion is disposed between the top surface of the substrate and a plane including the first surface of the first portion, and
wherein a vertical cross section of the second portion is substantially symmetrical with respect to an axis that is spaced apart in the first direction from and substantially parallel with the central axis of the respective light emitting device.
18. The light unit of claim 17 , wherein the second portion connects to the top surface of the substrate.
19. The light unit of claim 17 , wherein light is configured to be emitted from the respective light emitting device towards the respective optical lens to pass through the respective optical lens to an outside of the respective optical lens.
20. The light unit of claim 17 , wherein the recessed portion is part of the entire top surface of the respective optical lens.
21. The light unit of claim 17 , wherein the first portion is directly connected to the second portion.
22. The light unit of claim 17 , wherein only the second portion contacts the top surface of the substrate.
23. The light unit of claim 17 , wherein the second portion includes a bottommost surface of the respective optical lens.
24. The light unit of claim 17 , wherein the first portion is spaced apart from the top surface of the substrate.
25. The light unit of claim 17 , wherein the second portion extends up to the top surface of the substrate.
26. The light unit of claim 17 , wherein at least one of the first portion or the second portion is disposed in a lower region of the respective optical lens with respect to the central axis of the respective light emitting device.
27. The light unit of claim 17 , wherein the first and second portions are integral with the respective optical lens.
28. The light unit of claim 17 , wherein the respective optical lens further includes a round portion outside of the recessed portion.
29. The light unit of claim 28 , wherein the recessed portion is connected to a circumference of the round portion.
30. The light unit of claim 19 , wherein the light is configured to be emitted directly to the outside of the respective optical lens without being first reflected by the respective optical lens.
31. The light unit of claim 17 , wherein the recessed portion includes a curved or slanting shape.
32. The light unit of claim 17 , further comprising a hollow portion into or under which the respective light emitting device is disposed.
33. A display, comprising:
a plurality of light emitting devices on a substrate;
a plurality of optical lenses respectively disposed over the plurality of light emitting devices, the plurality of respective optical lenses comprising a recessed portion centrally disposed on a top surface of a respective optical lens, wherein the recessed portion inwardly recesses towards a respective light emitting device;
a diffusion plate disposed above the plurality of respective optical lenses; and
a display panel disposed above the diffusion plate,
wherein an upper surface of the respective light emitting device is below a bottom surface of the respective optical lens,
wherein a central axis of the respective light emitting device substantially aligns with a central axis of the recessed portion of the respective optical lens,
wherein the respective optical lens includes:
a body; and
an extending member extending from the body of the respective optical lens,
wherein the extending member comprises a first portion laterally extending in a first direction substantially perpendicular to the central axis of the respective light emitting device, and a second portion extending towards the substrate in a second direction substantially parallel with the central axis of the respective light emitting device,
wherein the first portion is separated from a top surface of the substrate,
wherein the first portion includes a laterally outermost surface of the respective optical lens, a first surface facing the top surface of the substrate, and a second surface opposite to the first surface,
wherein the second portion is disposed between the top surface of the substrate and a plane including the first surface of the first portion, and
wherein a vertical cross section of the second portion is substantially symmetrical with respect to an axis that is spaced apart in the first direction from and substantially parallel with the central axis of the respective light emitting device.
34. The display of claim 33 , wherein the second portion connects to the top surface of the substrate.
35. The display of claim 33 , wherein light is configured to be emitted from the respective light emitting device towards the respective optical lens to pass through the respective optical lens to an outside of the respective optical lens.
36. The display of claim 33 , wherein the recessed portion is part of the entire top surface of the respective optical lens.
37. The display of claim 33 , wherein the first portion is directly connected to the second portion.
38. The display of claim 33 , wherein only the second portion contacts the top surface of the substrate.
39. The display of claim 33 , wherein the second portion includes a bottommost surface of the respective optical lens.
40. The display of claim 33 , wherein the first portion is spaced apart from the top surface of the substrate.
41. The display of claim 33 , wherein the second portion extends up to the top surface of the substrate.
42. The display of claim 33 , wherein at least one of the first portion or the second portion is disposed in a lower region of the respective optical lens with respect to the central axis of the respective light emitting device.
43. The display of claim 33 , wherein the first and second portions are integral with the respective optical lens.
44. The display of claim 33 , wherein the respective optical lens further includes a round portion outside of the recessed portion.
45. The display of claim 44 , wherein the recessed portion is connected to a circumference of the round portion.
46. The display of claim 35 , wherein the light is configured to be emitted directly to the outside of the respective optical lens without being first reflected by the respective optical lens.
47. The display of claim 33 , wherein the recessed portion includes a curved or slanting shape.
48. The display of claim 33 , further comprising a hollow portion into or under which the respective light emitting device is disposed.