LED lamp with light-emitting junction arranged in three-dimensional array

• US 7,352,127 B2
• Filed: 09/29/2004
• Issued: 04/01/2008
• Est. Priority Date: 06/15/2000
• Status: Expired due to Term

• Current Assignee: Lednium Technology Pty Limited
• Original Assignee: Lednium Pty., Ltd.
• Inventors: Montagnat, John Albert, Jeganathan, Balu
• Primary Examiner(s): Guharay; Karabi
• Application Number:
  US10/953,797
• Publication Number:
  US 20050104515A1
• Time in Patent Office: 1,280 Days
• Field of Search: 313498-512, 257/79, 257/82, 257/88, 257/89, 257/81, 438106-112, 438/121, 438/123, 362/216, 362/362, 362364-366, 362/250, 362/252, 362/800
• US Class Current: 313/512
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• 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 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

In accordance with the present invention, there is provided a lamp including a plurality of semi-conductor light emitting junctions with a common layer of fluorescent material arranged thereover, wherein the junctions are provided in a three-dimensional array.

Claims

1. A lamp comprising a plurality of recesses arranged in a plurality of curved conductors to form a three-dimensional array of recesses and light emitting junctions mounted in the recesses, wherein the plurality of curved conductors is configured such that junctions are arranged substantially on an imaginary spheroid surface.

2. A lamp as claimed in claim 1, wherein the lamp includes a globe portion, with the junctions and the plurality of curved conductors being embedded within the globe portion so that the lamp is formed as a unitary structure.

3. A lamp as claimed in claim 2, wherein the lamp includes a lens adapted to fit with the globe portion, and configured to shape the light emitted from the globe portion into a predetermined pattern.

4. A lamp as claimed in claim 1, wherein the lamp comprises at least three curved conductors.

5. A lamp as claimed in claim 1, wherein each of the junctions is electrically connected to a respective one of the plurality of curved conductors to which it is mounted and to an adjacent curved conductor.

6. A lamp as claimed in claim 5, wherein the groups of junctions electrically connected in series are positioned beneath a lens.

7. A lamp as claimed in claim 1, wherein the plurality of curved conductors receives each of the respective junctions in a separate recess.

8. A lamp as claimed in claim 7, wherein the plurality of curved conductors are embedded within a globe portion of a lamp.

9. A lamp as claimed in claim 8, wherein each of the junctions is electrically connected to the one of the plurality of curved conductors to which it is mounted and to an adjacent curved conductor.

10. A lamp as claimed in claim 9, wherein the groups of junctions electrically connected in series are positioned beneath a lens.

11. A lamp as claimed in claim 7, wherein the lamp comprises at least three curved conductors.

12. A lamp as claimed in claim 7, wherein junctions received in respective recesses are electrically connected to respective ones of the plurality of curved conductors and to an adjacent conductor.

13. A lamp as claimed in claim 7, wherein the recess has side walls which function as an optical guide for controlling a direction of light transmission and/or an angle of divergence.

14. A lamp as claimed in claim 1, wherein the at least one curved conductor is configured such that junctions are arranged on an imaginary spheroid surface.

15. A lamp as claimed in claim 1, wherein the junctions have a common layer of fluorescent material arranged thereover.

16. A lamp as claimed in claim 1, wherein the lamp comprises a common layer of fluorescent material over at least adjacent junctions.

17. A lamp as claimed in claim 1, wherein the plurality of curved conductors is substantially convex.

18. A lamp as claimed in claim 1, wherein the plurality of curved conductors is substantially part-spherical.

19. The lamp of claim 1, wherein each conductor of the plurality of curved conductors comprises a plurality of recesses with junctions mounted therein, such that the junctions mounted in respective recesses of each conductor form corresponding groups of light emitting junctions electrically interconnected in parallel, the groups being electrically interconnected in series.

20. A lamp comprising a plurality of light emitting junctions mounted in recesses of a plurality of curved conductors to form a three-dimensional array of recesses, wherein the plurality of curved conductors receives each of the respective junctions in a separate recess, wherein the plurality of curved conductors is configured such that junctions are arranged substantially on an imaginary spheroid surface.

21. A lamp as claimed in claim 20, wherein the curved conductors are configured such that the junctions are arranged on an imaginary spheroid surface.

22. A lamp as claimed in claim 20, wherein the recesses have side walls which function as an optical guide for controlling at least one of:

a direction of light transmission and an angle of divergence.

23. A lamp as claimed in claim 20, wherein the lamp includes a globe portion, with the junctions and the plurality of curved conductors being embedded within the globe portion so that the lamp is formed as a unitary structure.

24. A lamp as claimed in claim 23, wherein the lamp includes a lens adapted to fit with the globe portion, and configured to shape the light emitted from the globe portion into a predetermined pattern.

25. A lamp as claimed in claim 20, wherein the respective ones of the plurality of curved conductors comprise curved conducting surfaces and the recesses are formed therein.

26. A lamp as claimed in claim 25, wherein the shapes of the plurality of curved conductors allow light generated by the lamp to appear to be coming from a generally singular small spherical or point source.

27. A lamp as claimed in claim 20, wherein junctions received in respective recesses are electrically connected to respective ones of the plurality of curved conductors and to an adjacent conductor.

28. A lamp as claimed in claim 20, wherein the junctions have a common layer of fluorescent material arranged thereover.

29. A lamp as claimed in claim 20, wherein the lamp comprises a common layer of fluorescent material over at least adjacent junctions.

30. A lamp as claimed in claim 20, wherein the plurality of curved conductors is substantially convex.

31. A lamp as claimed in claim 20, wherein the plurality of curved conductors is substantially part-spherical.

32. The lamp of claim 20, wherein each conductor of the plurality of curved conductors comprises a plurality of recesses with junctions mounted therein, such that the junctions mounted in respective recesses of each conductor form corresponding groups of light emitting junctions electrically interconnected in parallel, the groups being electrically interconnected in series.

33. A lamp including a plurality of recesses arranged to form a three-dimensional array of recesses in a plurality of curved conductors, wherein light emitting junctions are mounted in the recesses, wherein the junctions are arranged so as to be substantially on an imaginary spheroid surface, and wherein the lamp includes a globe portion, with the junctions and the recesses being embedded within the globe portion so that the lamp is formed as a unitary structure.

34. A lamp as claimed in claim 33, wherein the lamp includes a lens adapted to fit with the globe portion, and configured to shape the light emitted from the globe portion into a predetermined pattern.

35. A lamp as claimed in claim 33, wherein the plurality of curved conductors are embedded within a globe portion of a lamp.

36. A lamp as claimed in claim 33, wherein the lamp comprises at least three curved conductors.

37. A lamp as claimed in claim 33, wherein at least two recesses are formed in each of the plurality of curved conductors.

38. A lamp as claimed in claim 33, wherein each junction mounted in a recess is electrically connected to the recess and to an adjacent conductor configured to provide light regardless of the polarity of an electrical power source connected to the lamp.

39. A lamp as claimed in claim 33, wherein each of the junctions is electrically connected to a respective one of the plurality of curved conductors to which it is mounted and to an adjacent curved conductor.

40. A lamp as claimed in claim 39, wherein the junctions are grouped so as to form groups of junctions electrically connected in series.

41. A lamp as claimed in claim 33, wherein the arrangement of recesses and junctions is such that light produced by the lamp appears to emanate from a substantially point source.

42. A lamp as claimed in claim 33, wherein the junctions are arrange so as to be on an imaginary spheroid surface.

43. A lamp as claimed in claim 33, wherein the recesses have side walls forming an optical guide for controlling at least one of a direction of light emission from the lamp and an angle of divergence of light emission from the lamp.

44. A lamp as claimed in claim 33, wherein the plurality of curved conductors is substantially convex.

45. A lamp as claimed in claim 33, wherein the plurality of curved conductors is substantially part-spherical.

46. A lamp including a plurality of recesses arranged to form a three-dimensional array of recesses, wherein the plurality of recesses are formed in a plurality of curved conductors, which is substantially part-spherical, wherein light emitting junctions are mounted in the recesses, and wherein the junctions have a common layer of fluorescent material arranged thereover.

47. A lamp as claimed in claim 46, wherein the plurality of curved conductors is substantially convex.

48. A lamp as claimed in claim 46, wherein at least one of the plurality of curved conductors is part-spherical.

49. A lamp including a plurality of recesses arranged to form a three-dimensional array of recesses, wherein the plurality of recesses are formed in a plurality of curved conductors, which is substantially part-spherical, wherein light emitting junctions are mounted in the recesses, and wherein the lamp comprises a common layer of fluorescent material over at least adjacent junctions.

50. A lamp as claimed in claim 49, wherein the plurality of curved conductors is substantially convex.

51. A lamp as claimed in claim 49, wherein at least one of the plurality of curved conductor is part-spherical.