Serviceable, exchangeable LED assembly

• US 20060061997A1
• Filed: 09/20/2005
• Published: 03/23/2006
• Est. Priority Date: 09/20/2004
• Status: Abandoned Application

• Current Assignee: CAO Group, Inc.
• Original Assignee: CAO Group, Inc.
• Inventors: Lin, Zhaohui
• Application Number:
  US11/231,325
• Publication Number:
  US 20060061997A1
• Time in Patent Office: Days
• US Class Current: 362/294
• 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 17/10 characterised by specific fastening means or way of fastening F21V17/02 - F21V17/08 take precedence
• CPC Class Codes: F21V 19/0015 Fastening arrangements intended to retain light sources
• CPC Class Codes: F21V 19/04 with provision for changing light source, e.g. turret auxiliary devices for cleaning, placing, or removing incandescent lamps H01K3/32, fluorescent lamps H01J9/006
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 1/021 Components thermally connected to metal substrates or heat-sinks by insert mounting
• CPC Class Codes: H05K 1/182 associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 2201/10393 Clamping a component by an element or a set of elements
• CPC Class Codes: H05K 2201/10409 Screws
• CPC Class Codes: H05K 3/0061 onto a metallic substrate, e.g. a heat sink heat sinks for electric apparatus H05K7/20

Abstract

Structures and methodologies are disclosed for attaching an LED to a heat sink to permit the LED to be removable and replaceable, thereby making a serviceable LED assembly with an exchangeable LED.

Claims

1. A serviceable LED unit comprising:

a heat sink,

heat conduction paste on at least a portion of the surface area of said heat sink,

an LED in contact with said heat conduction paste so that heat generated by said LED can be transported through said paste into said heat sink,

a PCB board on which said LED is mounted,

at least one fastener, said fastener being removable,

a clamping assembly which affixes said PCB with respect to said heat sink by use of said fastener,

said clamping assembly being removable by removing said fastener, thus permitting access to said PCB so that said LED may be removed and exchanged in order to service the unit.

2. A device as recited in claim 1 further comprising an aperture in said clamping mechanism for permitting light from said LED to shine therethrough.

3. A device as recited in claim 1 wherein said clamping mechanism is a metal plate.

4. A device as recited in claim 1 wherein said LED emits a plurality of wavelengths of light.

5. A device as recited in claim 1 wherein said fasteners are selected from the group consisting of screws, bolts, rivets and pins.

6. A device as recited in claim 2 further comprising an optical reflector at said aperture.

7. A device as recited in claim 2 further comprising a beam shaping device at said aperture.

8. A device as recited in claim 1 wherein said clamping mechanism has an integral optical reflector of beam shaping mechanism built into it at said aperture.