Lamp and a process for producing a lamp

• US 20070087643A1
• Filed: 03/05/2004
• Published: 04/19/2007
• Est. Priority Date: 03/12/2003
• Status: Abandoned Application

• Current Assignee: Balu Jeganathan
• Original Assignee: Balu Jeganathan
• Inventors: Jeganathan, Balu
• Application Number:
  US10/548,498
• Publication Number:
  US 20070087643A1
• Time in Patent Office: Days
• US Class Current: 445/1
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21Y 2107/20 on convex supports or substrates, e.g. on the outer surface of spheres
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/45124 Aluminium (Al) as principal constituent
• CPC Class Codes: H01L 2224/45144 Gold (Au) as principal constituent
• CPC Class Codes: H01L 2224/48 of an individual wire connector
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/49109 outside the semiconductor or solid-state body
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• 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 33/60 Reflective 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 process for producing a lamp (100), including forming one or more electrical connectors (1702, 1704) having a predetermined shape for making electrical connections to one or more light source assemblies (1200) mounted at predetermined locations on a non-planar support (1506). The light source assemblies are formed by forming an electrical insulator (1302) on a peripheral region of an electrically conductive receptacle (602), forming an electrically conductive contact (902) adapted to fit the peripheral region, attaching the electrically conductive contact to the electrical insulator, mounting a light source (1202) in the receptacle, and making a first electrical connection (1204) between the a first electrically conductive contact of the receptacle and a first contact of the light source, and a second electrical connection (1206) between a second electrically conductive contact of the receptacle and a second contact of the light source. The light sources mounted in the electrically conductive receptacles are light emitting diodes and are encapsulated in transparent medium (1208). An array of electrically conductive receptacles is formed from sheet metal by stamping and cutting. Connected receptacles are subsequently separated from the sheet. The electrical connectors are first and second annular connectors (1702, 1704) with projections (1802, 1804, 1904, 1908) and are formed from a metal sheet and subsequently separated by removing joining portions (1708) and tie bars (1706).

Claims

1. A process for producing a lamp, including forming one or more electrical connectors having a predetermined shape for making electrical connections to one or more light source assemblies mounted at predetermined locations on a non-planar support.

2. A process as claimed in claim 1, wherein each of said light source assemblies includes:

a light source mounted in a receptacle;

a first electrical connection between a first contact of said light source and a first electrically conductive contact of the light source assembly; and

a second electrical connection between a second contact of said light source and a second electrically conductive contact of the light source assembly.

3. A process as claimed in claim 2, wherein said receptacle is electrically conductive, and said second electrically conductive contact includes said receptacle.

4. A process as claimed in claim 2, wherein said support includes a plurality of electrically conductive support portions, and said electrical connections include one or more electrical connections between said support portions and the first contacts or the second contacts.

5. A process as claimed in claim 2, including attaching said one or more electrical connectors to said one or more light source assemblies and said support to make one or more electrical connections between said support and the contacts of said one or more light source assemblies.

6. A process as claimed in claim 5, including dividing each of said one or more electrical connectors into two or more portions after attaching said one or more electrical connectors to said one or more light source assemblies.

7. A process as claimed in claim 6, wherein said dividing includes removing one or more portions of said one or more electrical connectors between respective light source assemblies to enable individual control of said light source assemblies.

8. A process as claimed in claim 1, wherein each of said electrical connectors includes a plurality of projections for contacting respective light source assemblies.

9. A process as claimed in claim 1, wherein each of said electrical connectors includes a plurality of projections for contacting said one or more light source assemblies and said support.

10. A process as claimed in claim 1, wherein each of said electrical connectors includes an annular portion having at least one inwardly projecting contact and at least one outwardly projecting contact.

11. A process as claimed in claim 10, wherein said annular portion is substantially planar, and said projecting contacts project away from the plane of said annular portion.

12. A process as claimed in claim 10, wherein said annular portion is substantially planar, and the process includes deforming the projecting contacts project away from the plane of said annular portion.

13. A process as claimed in claim 1, wherein the step of forming one or more electrical connectors includes forming an array of said electrical connectors interconnected by connector joining portions, and the process includes removing said connector joining portions to separate said electrical connectors from said array.

14. A process as claimed in claim 13, wherein the array of electrical connectors includes a plurality of inner annular contacts for making electrical connections near central portions of a plurality of non-planar supports, and a plurality of outer annular contacts for making electrical connections near peripheral regions of said supports.

15. A process as claimed in claim 14, wherein each of the annular contacts includes a plurality of projections for contacting said light source assemblies and a corresponding support, and an annular portion interconnecting said projections.

16. A process as claimed in claim 15, wherein the annular portions are substantially planar, and the process includes deforming one or more of said projections away from the plane of said annular portions to enable said annular contacts to contact corresponding portions of said light source assemblies and said support.

17. A process as claimed in claim 15, wherein the annular portions are substantially circular.

18. A process as claimed in claim 1, wherein a cross-sectional area of said one or more electrical connectors is selected to enable said electrical connectors to provide a selected electrical current to said light sources while avoiding excess heating of said electrical connectors.

19. A process as claimed in claim 1, wherein said electrical connectors are formed from sheet metal.

20. A process as claimed in claim 1, wherein said electrical connectors are formed by laser cutting.

21. An electrical connector produced by a process as claimed in any of one claims 1 to 20.

66. A lamp assembly produced by a process as claimed in any one of claims 1 to 20, or 26 to 64, or 72.

67. A lamp produced by a process as claimed in any one of claims 1 to 20, or 26 to 64, or 72.

68. A production system having components for executing the steps of any one of claims 1 to 20, or 26 to 64, or 72.

22. An electrically conductive sheet including a plurality of electrical connectors interconnected by joining portions, said electrical connectors adapted to make electrical connections to one or more light source assemblies mounted at predetermined locations on a non-planar support.

23. An electrically conductive sheet as claimed in claim 22, wherein said plurality of electrical connectors includes a plurality of inner annular contacts for making electrical connections near a central portion of said support, and a plurality of outer annular contacts for making electrical connections near a peripheral region of said support.

24. An electrically conductive sheet as claimed in claim 23, wherein each of the annular contacts includes a plurality of projections for contacting said light source assemblies and said support, and an annular portion interconnecting said projections.

25. An electrically conductive sheet as claimed in claim 23, wherein said annular contacts are substantially circular.

26. A process for producing a lamp, including:

forming an electrical insulator on a peripheral region of an electrically conductive receptacle;

forming an electrically conductive contact on said peripheral region;

attaching said electrically conductive contact to said electrical insulator;

mounting a light source in said receptacle; and

making a first electrical connection between a first electrically conductive contact of said receptacle and a first contact of said light source, and a second electrical connection between a second electrically conductive contact of said receptacle and a second contact of said light source.

27. A process as claimed in claim 26, wherein said first electrically conductive contact of the receptacle includes the receptacle, and said second electrically conductive contact of the receptacle includes the electrically conductive contact attached to the insulator.

28. A process as claimed in claim 26, wherein said step of forming an electrical insulator includes forming said insulator, and attaching the formed insulator to said peripheral region.

29. A process as claimed in claim 28, wherein said insulator is formed by machining an electrically insulating substance.

30. A process as claimed in claim 27, including mounting said receptacle or the electrically conductive contact attached to the insulator on an electrically conducting support to make an electrical connection to said support.

63. A process as claimed in claim 26, wherein said electrically conductive contact is adapted to fit said peripheral region.

65. A light source assembly produced by a process as claimed in any one of claims 26 to 62 or 63.

72. A process as claimed in claim 26, including mounting said receptacle in an opening of a metal cored printed circuit board, wherein the metal core of said board is electrically connected to said receptacle.

31. A process for producing a plurality of lamps, including:

forming an array of electrically conductive receptacles interconnected by receptacle joining portions;

forming electrical insulators on respective regions of said receptacles;

attaching electrically conductive contacts to said electrical insulators;

mounting light sources in said receptacles; and

making a first electrical connection between a first contact of each light source and a first electrically conductive contact of the receptacle in which it is mounted, and a second electrical connection between a second contact of the light source and a second electrically conductive contact of the receptacle to provide a plurality of light source assemblies.

32. A process as claimed in claim 31, wherein said first electrically conductive contact of the receptacle includes the receptacle, and said second electrically conductive contact of the receptacle includes an electrically conductive contact attached to the insulator.

33. A process as claimed in claim 31, wherein the first and second electrical connections are made using wire bonding.

34. A process as claimed in claim 31, including encapsulating the light sources and electrical connections within an optically transparent encapsulant.

35. A process as claimed in claim 34, wherein said step of encapsulating includes forming an array of encapsulants, and attaching the array of encapsulants to said plurality of light source assemblies.

36. A process as claimed in claim 31, including forming a plurality of individual light source assemblies by removing joining portions to separate said light source assemblies from an array including said plurality of light source assemblies.

37. A process as claimed in claim 36, including reversibly attaching said individual light source assemblies to a substrate for handling.

38. A process as claimed in claim 37, wherein said substrate includes a tape or reel handling system.

39. A process as claimed in claim 31, including forming an array of electrically conductive contacts interconnected by contact joining portions, wherein said step of attaching said electrically conductive contacts includes attaching the contacts of said array to said electrically insulating regions, and the process includes removing said contact joining portions to separate said contacts from said array.

40. A process as claimed in claim 39, including forming an array of electrical insulators interconnected by insulator joining portions, said step of attaching said electrical insulators includes attaching said electrical insulators of said array to respective regions of said receptacles, and the process includes removing said insulator joining portions to separate said insulators from said array.

41. A process as claimed in claim 40, including mounting two or more of said light source assemblies on a non-planar support to increase the divergence of light generated by said two or more light sources.

42. A process as claimed in claim 31, including forming an array of non-planar supports, each of said supports including holes for receiving respective cup assemblies.

43. A process as claimed in claim 42, wherein said step of forming an array of non-planar supports includes forming an array of planar supports, and deforming said planar supports to form said array of non-planar supports.

44. A process as claimed in claim 41, wherein said non-planar support is electrically conductive, and the process includes making an electrical connection between said support and the receptacle or the electrically conductive contact attached to the insulator of the light source assembly.

45. A process as claimed in claim 44, wherein the mounting of each light source assembly on the electrically conductive support makes an electrical connection with the receptacle or the electrically conductive contact attached to the insulator of the light source assembly.

46. A process as claimed in claim 45, wherein said non-planar support is partitioned into at least two support portions to enable individual control of one or more light sources electrically connected to each support portion.

47. A process as claimed in claim 42, wherein said step of forming an array of non-planar supports includes forming an array of support lead frames including said supports and contact leads for providing electric current to said supports.

48. A process as claimed in claim 47, wherein said non-planar supports are dome shaped.

49. A process as claimed in claim 41, including encapsulating the two or more light source assemblies and at least a portion of said support on which said two or more light source assemblies are mounted within an optically transparent encapsulant.

50. A process as claimed in claim 41, including mounting the support in an electrically insulating package of substantial thermal conductivity in direct contact with contact leads of a support lead frame including said support.

51. A process as claimed in claim 50, wherein said contact leads are contained between a cover portion and a base portion of said package.

52. A process as claimed in claim 51, wherein at least one of said cover portion and said base portion includes recesses adapted to accommodate said contact leads.

53. A process as claimed in claim 41, wherein the step of making electrical connections includes:

forming a plurality of electrical connectors, each having a predetermined shape to connect one or more corresponding portions of respective light source assemblies to said support; and

attaching said electrical connectors to said light source assemblies and said support to make said electrical connections.

54. A process as claimed in claim 53, including dividing at least one of said electrical connectors into two or more portions after attaching the at least one electrical connector to said light source assemblies and said support.

55. A process as claimed in claim 53, wherein each of said electrical connectors includes a plurality of projections for contacting said light source assemblies and said support, and an annular portion interconnecting said projections.

56. A process as claimed in claim 55, wherein said annular portion is substantially planar, and said projections project away from the plane of said annular portion.

57. A process as claimed in claim 55, wherein said annular portion is substantially circular.

58. A process as claimed in claim 53, wherein the step of forming a plurality of electrical connectors includes forming an array of said electrical connectors interconnected by connector joining portions, and the process includes removing said connector joining portions to separate said electrical connectors from said array.

59. A process as claimed in claim 58, wherein the array of electrical connectors includes a plurality of inner annular contacts for making electrical connections near central portions of said supports, and a plurality of outer annular contacts for making electrical connections near peripheral regions of said supports.

60. A process as claimed in claim 59, wherein each of the annular contacts includes a plurality of projections for contacting said light source assemblies and said support, and an annular portion interconnecting said projections.

61. A process as claimed in claim 60, wherein the annular portions are substantially planar, and the process includes deforming one or more projections of said annular contacts away from the plane of said annular portions to enable said annular contacts to mate with corresponding portions of said light source assemblies and said support.

62. A process as claimed in claim 59, wherein the annular contacts are substantially circular.

64. A process as claimed in claim 31, wherein the electrical insulators are formed on peripheral regions of said receptacles, and said electrically conductive contacts are adapted to fit said peripheral regions.

69. An array of electrically conductive receptacles for receiving respective light sources, said receptacles interconnected by receptacle joining portions.

70. An array of electrically conductive receptacles as claimed in claim 69, wherein the thickness of each receptacle is selected to provide sufficient conduction of heat generated by said light sources to maintain said light sources within a desired operating temperature range.

71. An array of electrically conductive receptacles as claimed in claim 69, wherein each of said receptacles includes a substantially planar peripheral region for attaching an electrical insulator to facilitate electrical connection to said light source.