Method of producing a lamp

• US 20030151343A1
• Filed: 11/26/2002
• Published: 08/14/2003
• Est. Priority Date: 06/15/2000
• Status: Active Grant

• Current Assignee: Lednium Technology Pty Limited
• Original Assignee: Lednium Technology Pty Limited
• Inventors: Montagnat, John Albert, Jeganathan, Balu
• Granted Patent: US 7,320,632 B2
• Time in Patent Office: Days
• US Class Current: 313/238
• 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 on a support structure such that the junctions adopt a three-dimensional array.

2. The method of claim 1, wherein the support structure comprises a plurality of conductors, the conductors formed in a curved configuration.

3. The method of claim 2, wherein the conductors are formed in a part spherical configuration.

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.

5. The method of claim 4, wherein the support structure is provided in the form of a lead frame so as to comprise a plurality of conductors.

6. The method of claim 5, wherein the conductors are formed in a part spherical configuration.

7. The method of claim 5, further comprising engaging a punch and die with the lead frame, to form the 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 action so that the punch and die are appropriately positioned for a subsequent recess forming action.

10. The method of claim 7 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 junctions are mounted to the conductors.

11. The method of claim 10, wherein the carrier is rotatable about first and second orthogonal axes to align the respective recess with the mounting station and the junctions are mounted in the respective recess by advancing the junctions and associated conductors relative to each along a third axis.

12. The method of claim 5, wherein each junction is electrically connected to two of the conductors via intermediate 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.

14. The method of claim 13, wherein the junctions are electrically coupled to the conductors in groups which are separately controllable.

15. The method of claim 1 further comprising application of a common phosphor over at least two adjacent junctions.

16. The method of claim 1 further comprising encapsulation of the support structure and junctions, in a globe portion.

17. A lead frame comprising a plurality of conductors formed in a curved configuration, for supporting light emitting junctions in a three-dimensional array.

18. The lead frame of claim 17 further comprising recesses for receipt of a respective one of the junctions.

19. A method of operating a lamp, comprising forming conductors and light emitting junctions electrically connected therebetween, including controlling electrical current through individual ones of the conductors so as to independently control light output from the junctions coupled thereto.