LED Source Adapted for Light Bulbs and the Like

• US 20100046221A1
• Filed: 08/19/2008
• Published: 02/25/2010
• Est. Priority Date: 08/19/2008
• Status: Abandoned Application

• Current Assignee: Bridgelux Incorporated
• Original Assignee: Bridgelux Incorporated
• Inventors: Solomensky, Michael, Posselt, Jason Loomis, Lester, Steven D., Hasnain, Ghulam
• Application Number:
  US12/194,134
• Publication Number:
  US 20100046221A1
• Time in Patent Office: Days
• US Class Current: 362/249.20
• 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: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• 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 2924/181 Encapsulation

Abstract

A light source and method for making the same are disclosed. The light source includes a housing, a drive assembly, and an LED. The housing has an interior compartment enclosed in an outer surface having a heat dissipating surface and first and second power terminals that are accessible from outside the interior compartment. The drive assembly is located in the interior compartment and electrically connected to the first and second power terminal. The LED is directly attached to the heat dissipating surface and electrically insulated therefrom, the LED having first and second LED power contacts. The housing has first and second housing power terminals disposed outside the housing, electrically isolated from the heat-dissipating surface, and connected to the drive assembly. A first conductor connects the first LED power contact to the first housing power terminal. A second conductor connects the LED second power contact to the second housing power terminal.

Claims

1. A light source comprising:

a housing having an interior compartment enclosed in an outer surface having a heat dissipating surface and first and second LED power terminals that are accessible from outside said interior compartment;

a first LED directly attached to said heat dissipating surface and electrically insulated therefrom, said first LED having first and second LED power contacts;

first and second housing power terminals disposed outside said housing, electrically isolated from said heat dissipating surface, said LED power contacts providing being powered when a potential difference is applied between said first and second housing power terminals;

a first conductor connecting said first LED power contact to said first LED power terminal; and

a second conductor connecting said LED second power contact to said second LED power terminal.

2. The light source of claim 1 further comprising a drive assembly electrically connected to said first and second housing power terminal and said first and second LED power terminals, said drive assembly being located in said interior compartment and providing power to said first and second LED power terminals.

3. The light source of claim 1 further comprising a protective cap covering said LED and said first and second conductors.

4. The light source of claim 3 wherein said protective cap comprises a transparent material.

5. The light source of claim 1 wherein said first and second LED power terminals comprise conducting members connected to said drive assembly that pass through first and second holes in said housing.

6. The light source of claim 5 wherein said first conducting member comprises a cylindrical conductor extending from said housing and having a cross-sectional area sufficient to accept a wire bond.

7. The light source of claim 1 wherein said first conductor comprises a wire bond.

8. The light source of claim 1 further comprising a second LED directly attached to said heat dissipating surface, said second LED being connected to said first LED by a wire bond.

9. A method for fabricating a light source comprising:

providing a heat dissipating surface;

directly attaching a plurality of LEDs to said heat dissipating surface, said LEDs being electrically isolated from said heat dissipating surface;

connecting two of said LEDs in series using wire bonds;

connecting said two of said LEDs to power terminals in said light source using wire bonds; and

covering said plurality of LEDs and said wire bonds with a transparent protective cover.

10. A device comprising:

a printed circuit board having a heat dissipating core;

a plurality of integrated circuit chips connected to said printed circuit board;

an LED mounting area comprising a portion of said printed circuit board in which said heat dissipating core is exposed; and

a plurality of LEDs attached directly to said heat dissipating core and electrically insulated therefrom, at least two of said LEDs being connected in series by a wire bond connected between said two LEDs, said LEDs being electrically connected to at least one of said integrated circuit chips.

11. The device of claim 10 wherein said device executes a function that is independent of the functioning of said LEDs.