Method of producing a lamp

• US 7,320,632 B2
• Filed: 11/26/2002
• Issued: 01/22/2008
• Est. Priority Date: 06/15/2000
• Status: Expired due to Term

• Current Assignee: Lednium Technology Pty Limited
• Original Assignee: Lednium Pty., Ltd.
• Inventors: Jeganathan, Balu, Montagnat, John Albert
• Primary Examiner(s): WILLIAMS, JOSEPH L
• Application Number:
  US10/305,294
• Publication Number:
  US 20030151343A1
• Time in Patent Office: 1,883 Days
• Field of Search: 313501-512, 362/800, 445 23- 25
• US Class Current: 445/24
• 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

Abstract

A method of producing a lamp is disclosed. The method provides for mounting light emitting junctions on a support structure such that the junctions adopt a three-dimensional array.

Claims

1. A method of producing a lamp, comprising mounting light emitting junctions to one or more conductors, the one or more conductors having a plurality of recesses arranged therein so as to form a three-dimensional array of recesses, such that the light emitting junctions are located within the recesses.

2. The method of claim 1, wherein the one or more conductors constitute a non-planar support that provides said three-dimensional array.

3. The method of claim 2, wherein at least a portion of each of the one or more conductors is substantially spherical in shape.

4. The method of claim 1 further comprises locating the junctions in respective recesses formed in the support structure, the recesses functioning as an optical guide for controlling a direction of light output from the associated junction, wherein each of said recesses is adapted to function as an optical guide for controlling at least one of a direction and an angle of divergence of light output from a corresponding light emitting junction.

5. The method of claim 2, wherein the non-planar support comprises a lead frame.

6. The method of claim 1, further comprising the step of forming said plurality of recesses prior to mounting said light emitting junctions.

7. The method of claim 6, wherein the step of forming comprises engaging a punch and die with a lead frame to form said plurality of recesses.

8. The method of claim 7, wherein the recesses are formed in a single action.

9. The method of claim 7, wherein the recesses are formed sequentially, and the punch and die are moved relative to the lead frame after each recess forming step so that the punch and dies are appropriately positioned for a subsequent recess forming step.

10. The method of claim 5, further comprising supporting the lead frame on a carrier and moving the carrier so as to present each recess to a mounting station whereat the light emitting junctions are mounted in the recesses.

11. The method of claim 10, wherein the carrier is rotatable about first and second axes to align each recess with the mounting station for mounting of a corresponding junction.

12. The method of claim 1, including connecting intermediate conductors to form electrical connections between each junction and two associated conductors.

13. The method of claim 12, wherein the intermediate conductors are connected to allow for independent control of at least two of the junctions, by controlling electric current through the associated conductors, to which each junction is connected, including forming electrical connections between the light emitting junctions and the conductors to allow control of electrical current Through individual ones of the conductors so as to independently control light output from the one or more junctions coupled thereto.

14. The method of claim 13, wherein the junctions are electrically coupled to form groups of junctions electrically connected in series.

15. The method of claim 1, further comprising applying a common layer of fluorescent material over at least two adjacent junctions.

16. The method of claim 1, further comprising encapsulating the one or more conductors and junctions in a globe portion.

17. The method of claim 1, wherein the arrangement of said recesses is such that the junctions mounted therein are arranged on an imaginary substantially spheroid surface.

18. The method of claim 3, further comprising forming the one or more part-spherical conductors by deforming one or more substantially planar conductors.

19. The method of claim 12, wherein each junction mounted in a recess is electrically connected to the recess and to an adjacent conductor.

20. The method of claim 1, further comprising applying a common layer of fluorescent material over said junctions.

21. The method of claim 16, further comprising mounting a lens on the globe portion, the lens being configured to shape the light emitted from the globe portion into a predetermined pattern.

22. The method of claim 1, wherein the light emitting junctions and recesses are arranged so that light output from the lamp appears to emanate from a substantially point light source.

23. A method of producing a lamp, comprising forming a lead frame including a plurality of recesses for supporting light emitting junctions located within the plurality of recesses, said recesses being arranged in one or more conductors so as to form a three-dimensional array of recesses.

24. The method of claim 23, further comprising deforming contact pins of said lead frame and mounting said contact pins at corresponding mounting locations of a printed circuit board.

25. A method of producing a plurality of lamps, comprising forming a lead frame comprising a plurality of interconnected sections for respective lamps, each of said sections comprising a plurality of recesses for supporting light emitting junctions such that said light emitting junctions are located within said recesses, said recesses being arranged in one or more conductors so as to form a three-dimensional array of recesses.

26. The method of claim 25, further comprising mounting light emitting junctions in said recesses and dividing said lead frame to separate said sections and thereby provide a plurality of lead frame assemblies for respective lamps.

27. A method of producing a lamp, comprising mounting light emitting junctions in a three-dimensional array of respective recesses of an electrically conductive, non-planar support such that the light emitting junctions are arranged on an imaginary substantially spheroid surface and located within said recesses so that light output from the lamp appears to emanate from a substantially point light source.

28. The method of claim 27, wherein each of said recesses is adapted to function as an optical guide for controlling at least one of a direction and an angle of divergence of light output from a corresponding light emitting junction.

29. The method of claim 28, wherein said recesses are formed in one or more conductors of said ton-planar support, and the method further comprises forming electrical connections between the light emitting junctions and the one or more conductors to provide electrical current to said junctions.

30. The method of claim 28, wherein said recesses are formed in conductors of said non-planar support, and the method further comprises forming electrical connections between the light emitting junctions and the conductors to allow control of electrical current through individual ones of the conductors so as to independently control light output from the one or more junctions coupled thereto.

31. A method of producing a lamp, comprising:

mounting light emitting junctions in respective recesses formed in a support structure such that the junctions form a three-dimensional array, each recess functioning as an optical guide for controlling a direction of light output from an associated junction, and wherein the support structure is provided in the form of a lead frame so as to comprise a plurality of conductors; and

engaging a punch and die with the lead frame to form the recesses sequentially, the punch and die being moved relative to the lead frame after each recess forming action so that the punch and die are appropriately positioned for a subsequent recess forming action.

32. A method of producing a lamp, comprising:

mounting light emitting junctions in respective recesses formed in a support structure such that the junctions form a three-dimensional array, each recess functioning as an optical guide for controlling a direction of light output from an associated junction, and wherein the support structure is provided in the form of a lead frame so as to comprise a plurality of conductors;

engaging a punch and die with the lead frame to form the recesses; and

supporting the lead frame on a carrier and moving the carrier so as to present each recess to a mounting station whereat the junctions are mounted to the conductors.

33. The method of claim 32, wherein the carrier is rotatable about first and second orthogonal axes to align each recess with the mounting station, and the junctions are mounted in the recesses by advancing the junctions and associated conductors relative to each along a third axis.

34. A method of producing a lamp, comprising mounting light emitting junctions to bases of respective recesses of a non-planar support, the recesses being arranged in a three-dimensional array, such that the light emitting junctions are arranged on an imaginary substantially spheroid surface and located within said recesses so that light output from the lamp appears to emanate from a substantially point light source.

35. A method of producing a lamp, comprising mounting light emitting junctions in respective recesses of a non-planar support, the recesses being arranged in a three-dimensional array, such that the light emitting junctions are arranged on an imaginary substantially spheroid surface and located within said recesses so that light output from the lamp appears to emanate from a substantially point light source, the recesses having sidewalls and bases.

36. A method of producing a lamp, comprising mounting light emitting junctions in respective recesses of a non-planar support, the recesses being arranged in a three-dimensional array, a portion of said support extending across each of said recesses to support said light emitting junctions such that the light emitting junctions are arranged on an imaginary substantially spheroid surface and located within said recesses so that light output from the lamp appears to emanate from a substantially point light source.