LED lighting assembly

• US 7,652,303 B2
• Filed: 03/13/2006
• Issued: 01/26/2010
• Est. Priority Date: 12/10/2001
• Status: Expired due to Term

• Current Assignee: Emissive Energy Corporation
• Original Assignee: Robert D. Galli
• Inventors: Galli, Robert D.
• Primary Examiner(s): SEFER, AHMED N
• Application Number:
  US11/276,754
• Publication Number:
  US 20060145180A1
• Time in Patent Office: 1,415 Days
• Field of Search: 257/99, 257/433, 257/676, 438/27, 438/123
• US Class Current: 257/99
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/745 the fins or blades being planar and inclined with respect to the joining surface from which the fins or blades extend
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The present invention provides a lighting head assembly that incorporates a high intensity LED package into an integral assembly including a heat sink and circuit board for further incorporation into other useful lighting devices. The present invention primarily includes a heat sink member that also serves as a mounting die and a reflector cup into which the LED package is mounted. The circuit board is placed behind the reflector cup and includes riser members that extend through holes in the rear wall of the reflector cup to facilitate electrical connections to the leads of the LED. This particular means for assembly allows the reflector cup and circuit board to cooperate to retain the LED package, provide electrical and control connections, provide integral heat sink capacity and includes an integrated reflector cup. In this manner, high intensity LED packages can be incorporated into lighting assemblies through the use of the present invention by simply installing the present invention into a housing and providing power connections thereto.

Claims

1. A light emitting diode assembly comprising:

a light emitting diode having a mounting base, an output end received on a top surface of said mounting base and a first and second contact lead extending from the sides of said mounting base;

a mounting die, said mounting die having a first end, a second end, an interior cavity extending inwardly from said first end, a rear wall at said second end thereof, a channel extending longitudinally through said rear wall and an opening that extends through said rear wall into said interior cavity; and

a circuit board having first and second electrical traces thereon, a top surface and a bottom surface, said light emitting diode is affixed to said top surface of said circuit board, said top surface with said light emitting diode thereon both being received adjacent said rear wall of said mounting die, said channel having side walls configured to receive and align said mounting base of said light emitting diode within said mounting die,

wherein said first contact lead in electrical communication with said first electrical trace and said second contact lead in electrical communication with said second electrical trace and said output end is received in said opening such that light emitted from said output end of said light emitting diode is directed into said cavity in said mounting die.

2. The light emitting diode assembly of claim 1, further comprising:

at least one ear extending from a peripheral edge of said circuit board,

wherein said ear is received between said channel side walls thereby preventing rotation of said circuit board relative to said mounting die.

3. The light emitting diode assembly of claim 1, further comprising:

means for preventing said circuit board from rotating relative to said mounting die.

4. The light emitting diode assembly of claim 3, said means for preventing said circuit board from rotating comprising:

a channel in a bottom surface of said rear wall of said mounting die; and

at least one ear on a peripheral edge of said circuit board, said ear configured to engage side walls of said channel thereby preventing rotation of said circuit board relative to said mounting die.

5. The light emitting diode assembly of claim 1, wherein said mounting die is thermally and electrically conductive and said first electrical trace on said circuit board is in electrical communication with said mounting die.

6. The light emitting diode assembly of claim 5, further comprising:

a spring biased electrical contact extending from and in electrical communication with said bottom surface of said circuit board.

7. The light emitting diode assembly of claim 6, further comprising:

a power source in electrical communication with said spring biased electrical contact extending from said circuit board and said mounting die.

8. The light emitting diode assembly of claim 1, wherein said cavity within said mounting die serves as a reflector cup to direct light output from said light emitting diode.

9. The light emitting diode assembly of claim 8, wherein said reflector cup is shaped to form a parabolic reflector.

10. The light emitting diode assembly of claim 8, wherein said reflector cup is shaped to form an ellipsoidal reflector.