LIGHT EMITTING DEVICES, SYSTEMS, AND METHODS

• US 20120193651A1
• Filed: 09/02/2011
• Published: 08/02/2012
• Est. Priority Date: 11/22/2010
• Status: Active Grant

• Current Assignee: Creeled Incorporated
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Edmond, John A., Kong, Hua-Shuang, Donofrio, Matthew
• Granted Patent: US 9,490,235 B2
• Time in Patent Office: Days
• US Class Current: 257/88
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• 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 33/52 Encapsulations

Abstract

Light emitting devices, systems, and methods are disclosed. In one embodiment a light emitting device can include an emission area having one or more light emitting diodes (LEDs) mounted over an irregularly shaped mounting area. The light emitting device can further include a retention material disposed about the emission area. The retention material can also be irregularly shaped, and can be dispensed. Light emitting device can include more than one emission area per device.

Claims

1. A light emitting device, comprising:

an emission area comprising one or more light emitting diodes (LEDs) mounted over an irregularly shaped mounting area; and

a retention material disposed about the irregularly shaped mounting area.

2. The device of claim 1, wherein the one or more light emitting diodes are arranged in an array.

3. The device of claim 1, wherein the device comprises more than one emission area.

4. The device of claim 1, wherein a portion of the emission area comprises a concave portion adjacent an attachment area.

5. The device of claim 1, wherein the emission area is disposed over a submount.

7. The device of claim 1, wherein the retention material is dispensed.

8. The device of claim 1, wherein the emission area further comprises a filling material disposed over the one or more LEDs, the filling material being retained by the retention material.

9. The device of claim 1, wherein the device comprises a first emission area disposed over a first surface and a second emission area disposed over a second surface, wherein an angle is disposed between the first and second surfaces for emitting light at different angles.

10. The device of claim 1, wherein the emission area comprises a plurality of LEDs electrically connected in series via wirebonds.

11. The device of claim 10, wherein the plurality of LEDs comprises one or more strings of LEDs arranged in more than one different pattern.

12. The device of claim 1, wherein the emission area comprises a plurality of LEDs electrically connected in parallel over one or more isolated portions of the mounting area.

13. The device of claim 1, wherein the device comprises four irregularly shaped emission areas.

14. The device of claim 3, wherein the device further comprises an attachment area at least partially disposed between the more than one emission areas.

15. The device of claim 1, wherein the mounting area comprises a single, undivided mounting area.

16. The device of claim 15, wherein the device comprises more than one mounting area.

17. The device of claim 1, wherein the device comprises no more than one line of symmetry.

18. The device of claim 1, wherein the device comprises no more than two lines of symmetry.

19. The device of claim 1, wherein the device is asymmetric.

6. The device of claim 6, wherein the emission area is disposed off-center on the submount.

20. A light emitting device, comprising:

an irregularly shaped emission area comprising one or more light emitting diodes (LEDs); and

an attachment area disposed outside of the irregularly shaped emission area.

21. The device of claim 20 comprising more than one emission area.

22. The device of claim 20 comprising more than one attachment area.

23. The device of claim 20, wherein the one or more LEDs are mounted over an irregularly shaped mounting area.

24. The device of claim 20, further comprising a retention material disposed about the irregularly shaped emission area.

25. The device of claim 20, wherein the emission area is disposed over a submount.

26. The device of claim 20, wherein the emission area is disposed off-center on the submount.

27. The device of claim 24, wherein the retention material is dispensed.

28. The device of claim 20, wherein the emission area further comprises a filling material disposed over the one or more LEDs, the filling material being retained by a retention material.

29. The device of claim 20, wherein the device comprises a first emission area disposed over a first surface and a second emission area disposed over a second surface, wherein an angle is disposed between the first and second surfaces for emitting light at different angles.

30. The device of claim 20, wherein the emission area comprises a plurality of LEDs electrically connected in series via wirebonds.

31. The device of claim 30, wherein the plurality of LEDs comprises one or more strings of LEDs arranged in more than one different pattern.

32. The device of claim 20, wherein the emission area comprises a plurality of LEDs electrically connected in parallel over one or more isolated portions of the mounting area.

33. The device of claim 20, wherein the device comprises four irregularly shaped emission areas.

34. The device of claim 20, wherein the device comprises no more than one line of symmetry.

35. The device of claim 20, wherein the device comprises no more than two lines of symmetry.

36. The device of claim 20, wherein the device is asymmetric.

37. The device of claim 20, wherein the attachment area comprises an opening.

38. The device of claim 20, wherein the attachment area comprises a clip fastener.

39. A light emitting system comprising:

a first surface

a second surface angled with respect to the first surface;

a first emission area disposed over the first surface; and

a second emission area disposed over the second surface;

wherein each of the first and second emission areas comprise one or more light emitting diodes (LEDs) mounted over an irregularly shaped mounting area;

a retention material dispensed about the irregularly shaped mounting area.

40. The system of claim 39, further comprising a housing for electrically, mechanically, and thermally connecting to the first and second surfaces.

41. The system of claim 39, further comprising a diffuser disposed about the first and second surfaces.

42. The system of claim 39, further comprising a bulb disposed over the first and second surfaces.

43. The system of claim 39, further comprising a third surface angled with respect to the second surface, the third surface comprising a third emission area.

44. The system of claim 39, wherein the one or more LEDs comprises a plurality of LEDs electrically connected in series over the irregularly shaped mounting area.

45. The system of claim 44, wherein the plurality of LEDs comprises one or more strings of LEDs arranged in more than one different pattern.

46. The system of claim 39, wherein the first emission area comprises a plurality of LEDs electrically connected in parallel over one or more isolated portions of the mounting area.

47. The system of claim 39, wherein the first and second emission areas comprise irregularly shaped areas.

48. The system of claim 47, wherein the first and second emission areas comprise no more than one line of symmetry.

49. The system of claim 47, wherein the first and second emission areas comprise no more than two lines of symmetry.

50. The system of claim 47, wherein the first and second emission areas are asymmetric.

51. A method of providing a light emitting device, the method comprising:

providing one or more light emitting diodes (LEDs) mounted over an irregularly shaped mounting area, the LEDs comprising a first light emission area; and

providing a retention material disposed about the irregularly shaped mounting area.

52. The method of claim 51, further comprising providing a filling material within the retention material.

53. The method of claim 51, further comprising attaching the mounting area over a thermally conductive submount.

54. The method of claim 53, wherein the thermally conductive submount comprises a thermally conductive housing within an LED system.

55. The method of claim 51, wherein providing the one or more LEDs comprises providing an array of LEDs.

56. The method of claim 51, comprising providing multiple emission areas disposed over a thermally conductive submount.

57. The method of claim 51, comprising providing a first emission area having one or more concave portions adjacent an attachment area.

58. The method of claim 51, wherein providing retention material comprises dispensing retention material.

59. The method of claim 51, further comprising providing the first emission area disposed over a first surface and a second emission area disposed over a second surface, where the second surface is angled with respect to the first surface.

60. The method of claim 51, wherein providing one or more LEDs comprises providing a plurality of LEDs electrically connected in series via wirebonds.

61. The method of claim 51, providing one or more LEDs comprises one or more strings of LEDs arranged in more than one different pattern.

62. The method of claim 51, further comprising providing an attachment area at least partially disposed between the more than one emission areas.

63. A method of providing a light emitting device, the method comprising:

providing an irregularly shaped emission area comprising one or more light emitting diodes (LEDs); and

providing an attachment area disposed outside of the irregularly shaped emission area providing a retention material disposed about the irregularly shaped mounting area.

64. The method of claim 63, wherein the irregularly shaped emission area comprises no more than one line of symmetry.

65. The method of claim 63, wherein the irregularly shaped emission area comprises no more than two lines of symmetry.

66. The method of claim 63, wherein the irregularly shaped emission area is asymmetric.

67. The method of claim 63, further comprising dispensing a retention material about the emission area.

68. The method of claim 63, further comprising providing more than one irregularly shaped emission areas over a submount.