Light emitter devices and methods for light emitting diode (LED) chips

• US 9,461,024 B2
• Filed: 08/01/2013
• Issued: 10/04/2016
• Est. Priority Date: 08/01/2013
• Status: Active Grant

• Current Assignee: Creeled Incorporated
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Hussell, Christopher P.
• Primary Examiner(s): ZHU, SHENG-BAI
• Application Number:
  US13/956,814
• Publication Number:
  US 20150034978A1
• Time in Patent Office: 1,160 Days
• Field of Search: 257/89, 257/93, 257/88, 257/91, 438/27, 438/26
• US Class Current: 1/1
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• 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: H01L 2933/005 relating to encapsulations
• CPC Class Codes: H01L 33/54 having a particular shape

Abstract

Light emitter devices and methods are provided herein. In some aspects, emitter devices and methods provided herein are for light emitting diode (LED) chips, and can include providing a substrate and a plurality of LED chips over the substrate. The devices and methods described herein can further include providing a plurality of integral lenses over the LED chips, where at least some of the lenses can be distorted. In some aspects, the distorted lenses can be compressed towards each other along one or more directions.

Claims

1. A light emitter device comprising:

a substrate;

at least two light emitting diode (LED) chips disposed over the substrate; and

at least two lenses provided over the substrate and contacting the at least two LED chips, wherein each lens comprises a respective lens base at least partially disposed over the substrate and an apex centrally located with respect to each respective lens base and one or more of the at least two LED chips, wherein at least a portion of at least one of the lenses adjacent another lens is distorted, and wherein each respective lens base at least partially surrounds one or more of the at least two LED chips.

2. The light emitter device according to claim 1, wherein the at least two lenses are integrally formed.

3. The light emitter device according to claim 1, wherein the lenses are both distorted.

4. The light emitter device according to claim 3, wherein the lenses are compressed towards each other.

5. The light emitter device according to claim 1, wherein the portion of the lens distorted is linear.

6. The light emitter device according to claim 1, wherein at least one lens is bounded by one or more linear surfaces and one or more curved surfaces.

7. The light emitter device according to claim 6, wherein the linear surfaces are elevated over the substrate and parallel thereto.

8. The light emitter device according to claim 6, wherein the curved surfaces are disposed directly on the substrate.

9. The light emitter device according to claim 1, wherein at least one lens comprises a dome comprising a first sectional arc and a second sectional arc of different lengths.

10. The light emitter device according to claim 9, wherein the first and second sectional arcs are substantially orthogonal.

11. The light emitter device according to claim 1, wherein at least one of the lenses comprises a first maximum width and a second maximum width, and wherein the first maximum width is smaller than the second maximum width.

12. The light emitter device according to claim 11, wherein the second maximum width comprises a diameter of a sphere.

13. The light emitter device according to claim 1, wherein the at least two LED chips comprise a same color.

14. The light emitter device according to claim 1, wherein the at least two LED chips comprise different colors.

15. The light emitter device according to claim 13, wherein a layer of phosphor is provided over each LED chip.

16. The light emitter device according to claim 1, wherein the substrate comprises a printed circuit board.

17. The light emitter device according to claim 1, wherein the substrate comprises a ceramic material.

18. The light emitter device according to claim 1, wherein at least two traces are provided over the substrate.

19. The light emitter device according to claim 18, wherein at least one of the LED chips is wirebonded to at least one trace.

20. The light emitter device according to claim 1, wherein the at least two LED chips are each provided under a same lens.

21. The light emitter device according to claim 1, wherein each LED chip is provided under a different lens.

22. The light emitter device according to claim 1, further comprising a plurality of LED chips provided in multiple rows.

23. The light emitter device according to claim 22, wherein the rows are staggered in a first direction.

24. The light emitter device according to claim 1, comprising a plurality of hexagonally shaped lenses distorted in portions of the lenses where the lenses are adjacent each other.

25. A light emitter device comprising:

a substrate;

a plurality of light emitting diode (LED) chips disposed over the substrate; and

a plurality of integrally formed lenses provided over the substrate, wherein each lens of the plurality of lenses comprises a lens base at least partially disposed over the substrate and an apex centrally located with respect to the lens base, and wherein each lens completely surrounds one or more of the plurality of LED chips;

wherein a period of each lens is larger than each LED chip, and wherein the plurality of lenses intersect in a plurality of locations along a first direction.

26. The light emitter device according to claim 25, wherein the lenses are compressed in the first direction.

27. The light emitter device according to claim 25, wherein each lens comprises a first maximum width and a second maximum width, wherein the first maximum width is smaller than the second maximum width.

28. The light emitter device according to claim 27, wherein the second maximum width comprises a diameter of a sphere.

29. The light emitter device according to claim 25, wherein each lens is provided over multiple LED chips.

30. The light emitter device according to claim 25, wherein the plurality of LED chips are provided in a square array.

31. The light emitter device according to claim 25, wherein the plurality of LED chips are provided in multiple rows.

32. The light emitter device according to claim 31, wherein the rows are staggered in the first direction.