LAMP AND A PROCESS FOR PRODUCING A LAMP

• US 20110044044A1
• Filed: 08/03/2010
• Published: 02/24/2011
• Est. Priority Date: 03/12/2003
• Status: Abandoned Application

• Current Assignee: Lednium Technology Pty Limited
• Original Assignee: Lednium Technology Pty Limited
• Inventors: Montagnat, John Albert, Jeganathan, Balu
• Application Number:
  US12/849,762
• Publication Number:
  US 20110044044A1
• Time in Patent Office: Days
• US Class Current: 362/249.02
• 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, 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. The light source assemblies are formed by forming an electrical insulator on a peripheral region of an electrically conductive receptacle, forming an electrically conductive contact adapted to fit the peripheral region, attaching the electrically conductive contact to the electrical insulator, mounting a light source in the receptacle, and making a first electrical connection between a first electrically conductive contact of the receptacle and a first contact of the light source, and a second electrical connection 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. 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 with projections and are formed from a metal sheet and subsequently separated by removing joining portions and tie bars.

Claims

1. A process for producing a lamp, including:

forming an electrically conductive receptacle having a substantially planar base and a substantially planar peripheral region;

forming a substantially planar electrical insulator on said substantially planar peripheral region;

forming a substantially planar electrically conductive contact on said substantially planar electrical insulator;

mounting a light source on said base of said receptacle;

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

encapsulating said light source and said electrical connections to provide a light source assembly for mounting on an electrically conductive support, wherein an unencapsulated portion of said substantially planar electrically conductive contact provides a first electrical contact to said light source mounted in said receptacle, and the electrically conductive receptacle provides a second electrical contact to the light source.

2. A process for producing a lamp, including:

forming an array of electrically conductive receptacles interconnected by receptacle joining portions, each of said receptacles having a substantially planar base and a substantially planar peripheral region;

forming an array of substantially planar electrical insulators on said peripheral regions of said receptacles;

forming an array of substantially planar electrically conductive contacts on said electrical insulators;

mounting light sources on the bases of said array of receptacles;

making first electrical connections between a first contact of each light source and the electrically conductive contact of the corresponding receptacle, and second electrical connections between a second contact of each light source and the corresponding receptacle; and

encapsulating said light sources and said electrical connections to form an array of light source assemblies, wherein an unencapsulated portion of the substantially planar electrically conductive contact of each receptacle provides a first electrical contact to the light source mounted in that receptacle, and the electrically conductive receptacle provides a second electrical contact to the light source.

3. A process as claimed in claim 2, wherein said step of encapsulating includes forming an array of encapsulants, and attaching the array of encapsulants to said plurality of light source assemblies.

4. A process as claimed in claim 2, including forming a plurality of individual light source assemblies by removing said receptacle joining portions to separate said light source assemblies from said array.

5. A process as claimed in claim 4, including reversibly attaching said individual light source assemblies to a substrate for handling.

6. A process as claimed in claim 5, wherein said substrate includes a tape or reel handling system.

7. A process as claimed in claim 2, wherein said step of forming said array of electrically conductive contacts includes forming said array of electrically conductive contacts interconnected by contact joining portions, and 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.

8. A process as claimed in claim 7, wherein said step of forming said array of electrical insulators includes forming said array of said electrical insulators interconnected by insulator joining portions, and 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.

9. A process as claimed in claim 8, 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.

10. A process as claimed in claim 2, including forming an array of non-planar supports, each of said supports including holes or recesses for receiving respective light source assemblies.

11. A process as claimed in claim 9, 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.

12. A process as claimed in claim 10, 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.

13. A process as claimed in claim 9, 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.

14. A process as claimed in claim 13, 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.

15. A lamp produced by a process as claimed in claim 3.

16. A lamp produced by a process as claimed in claim 6.

17. An array of light source assemblies, including:

an array of electrically conductive receptacles for receiving respective light sources, said receptacles interconnected by receptacle joining portions, each of said receptacles having a substantially planar base and a substantially planar peripheral region;

an array of substantially planar electrical insulators on said peripheral regions of said electrically conductive receptacles;

an array of substantially planar electrically conductive contacts on said electrical insulators;

light sources mounted on the bases of said array of electrically conductive receptacles;

first electrical connections between said electrically conductive contacts and first contacts of said light sources, and second electrical connections between said electrically conductive receptacles and second contacts of said light sources; and

said light sources and said electrical connections being encapsulated, wherein an unencapsulated portion of the substantially planar electrically conductive contact of each receptacle provides a first electrical contact to the light source mounted in that receptacle, and the electrically conductive receptacle provides a second electrical contact to the light source.

18. An array of light source assemblies as claimed in claim 17, wherein the thickness of said receptacles is selected to provide sufficient conduction of heat generated by said light sources to maintain said light sources within a desired operating temperature range.