High power LED

• US 6,541,800 B2
• Filed: 02/11/2002
• Issued: 04/01/2003
• Est. Priority Date: 02/22/2001
• Status: Expired due to Term

• Current Assignee: Akron Brass Company (Comfidex Corp.)
• Original Assignee: Weldon Technologies, Inc.
• Inventors: Barnett, Thomas J., Tillinghast, Sean P.
• Primary Examiner(s): Wilson, Allan R.
• Application Number:
  US10/073,731
• Publication Number:
  US 20020113244A1
• Time in Patent Office: 414 Days
• Field of Search: 257/98-100
• US Class Current: 257/98
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 17/12 by screwing
• CPC Class Codes: F21V 17/14 Bayonet-type fastening
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 19/0015 Fastening arrangements intended to retain light sources
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/85 characterised by the material liquid coolants F21V29/56
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 5/10 comprising photoluminescent material
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• 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 2924/01078 Platinum [Pt]
• CPC Class Codes: H01L 2924/01079 Gold [Au]
• CPC Class Codes: H01L 2924/12041 LED
• CPC Class Codes: H01L 2924/3025 : Electromagnetic shielding
• CPC Class Codes: H01L 33/483 : Containers
• CPC Class Codes: H01L 33/56 : Materials, e.g. epoxy or silicone resin
• CPC Class Codes: H01L 33/58 : Optical field-shaping 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: H01L 33/642 : characterized by the shape
• CPC Class Codes: H01L 33/647 : the elements conducting electric current to or from the semiconductor body

Abstract

A method and system are taught for a system comprising an LED package. The LED package may comprise an anode, a cathode coupled to the anode, an LED die coupled to the cathode and the anode, a lens coupled to the anode, and a viscous or silicone material located in a cavity defined by the lens, the cathode, and the anode. The viscous or silicone material may be a gel, a grease, a non-resilient material, or a non-liquid material. The method and system may further comprise a mounting device, wherein the lens is mechanically coupled to the mounting device in a socket, bayonet, or screwing like fashion. The method and system may further comprise an anode strip comprising an array of anodes utilized to form an array of the LED packages and a carrier strip comprising receiving devices to receive the array of LED packages. A portion of the lens may either be coated with or comprise light excitable material or the viscous material may comprise light excitable material, such that the system emits white light.

Claims

1. A system comprising an LED package, the LED package comprising:

an annular anode;

a cathode coupled to the annular anode;

an LED die coupled to the cathode and the annular anode;

a lens coupled to the annular anode; and

a viscous material located in a cavity defined by the lens, the cathode, and the annular anode.

2. The system of claim 1 further comprising a mounting device, wherein the LED package is mechanically coupled to the mounting device via the lens.

3. The system of claim 1, further comprising a light fixture.

4. The system of claim 1 further comprising:

an anode strip comprising an array of anodes utilized to form an array of the LED packages; and

a carrier strip comprising receiving devices to receive the array of LED packages.

5. The system of claim 1 wherein the annular anode and the lens comprise complementary coupling devices for matingly engaging said annular anode and lens to one another.

6. The system of claim 5 wherein the complementary coupling devices are annular anode barbs and lens openings.

7. The system of claim 1 wherein the LED die is comprised of a plurality of LED dies.

8. The system of claim 1 wherein the LED die is coupled to the cathode via a thermally and electrically conductive epoxy and the LED die is coupled to the annular anode via wire bonding.

9. The system of claim 1 wherein the cathode is a heat sink.

10. The system of claim 1 wherein the cathode comprises a die cup into which the LED die is coupled.

11. The system of claim 1 wherein the annular anode is a lead frame.

12. The system of claim 1 wherein a portion of the lens comprises light excitable material such that the system emits white light.

13. The system of claim 1 wherein a portion of the lens comprises dispersants to diffuse output light.

14. The system of claim 1 wherein the viscous material is a non-resilient material.

15. The system of claim 1 wherein the viscous material is a grease.

16. The system of claim 1 wherein the viscous material is a non-liquid material.

17. The system of claim 1 wherein the viscous material is a silicone material.

18. The system of claim 1 wherein a portion of the lens is coated with light excitable material such that the system emits white light.

19. The system of claim 1 wherein the system is incorporated into a taillight device.

20. The system of claim 1 wherein the system is incorporated into a flashlight device.

21. The system of claim 1 further comprising a socket device that is mounted on a board, wherein the lens is mechanically coupled to the socket device via lens protrusions and securely biased in the socket device by flexible extensions extending from the annular anode.

22. The system of claim 1 wherein the cathode comprises a threaded portion, wherein the threaded portion is used to couple the LED package to the system.

23. The system of claim 1 wherein the viscous material comprises a light excitable material.

24. The system of claim 23 where a white light is produce by the light excitable material.

25. The system of claim 1 further comprising:

a mounting device; and

protrusions adjacent an attachment end of the cathode,

wherein the LED package is mechanically mounted to the mounting device via the protrusions.

26. The system of claim 1 wherein the lens comprises an optical geometry to diffuse illumination from the LED die.

27. The system of claim 1 wherein the lens comprises an optical pattern to diffuse illumination from the LED die.

28. The system of claim 1 wherein the lens comprises an optical geometry to produce a desired light pattern.

29. The system of claim 1 wherein the lens comprises an optical pattern to produce a desired light pattern.

38. The system of claim 1 wherein the cavity is filled with the viscous material.

30. A system comprising:

a mounting device; and

an LED package, the LED package comprising;

an annular lead frame with a central opening;

a heat sink coupled to the lead frame adjacent the central opening;

an LED die coupled to the heat sink and via wire bonding to the lead frame;

a lens coupled to the lead frame, the lens comprising protrusions that are utilized to mechanically secure the LED package to the mounting device;

silicone material located in a cavity defined by the lens, the heat sink, and the lead frame.

31. The system of claim 30 wherein the silicone material is a gel.

32. The system of claim 30 wherein the silicone material is viscous.

33. The system of claim 30 wherein the silicone material is a grease.

34. A system comprising an LED package, the LED package comprising:

an annular anode;

a cathode coupled to the annular anode;

an LED die coupled to the cathode and the annular anode;

a lens coupled to the annular anode; and

a cavity defined by the lens, the cathode, and the annular anode.

35. The system of claim 34 further comprising a material in the cavity.

36. The system of claim 35 wherein the material is a viscous material.

37. A system comprising an LED package, the LED package comprising:

an annular anode;

a cathode coupled to the anode;

an LED die coupled to the cathode and the anode;

a lens coupled to the anode; and

a viscous material located in a cavity defined by the lens, the cathode, and the anode.