LED lighting module

• US 7,806,575 B2
• Filed: 09/12/2006
• Issued: 10/05/2010
• Est. Priority Date: 09/22/2005
• Status: Active Grant

• Current Assignee: Lumileds LLC (Apollo Global Management, Inc.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Willwohl, Harald, Peters, Ralph Hubert, Elders, Gerard, Van Der Wielen, Piet, Reniers, Jan
• Primary Examiner(s): Choi; Jacob Y
• Application Number:
  US12/067,845
• Publication Number:
  US 20080253127A1
• Time in Patent Office: 1,484 Days
• Field of Search: 362/545, 362546-549, 362/218, 362/221, 362/264, 362/265, 362/267, 362/373
• US Class Current: 362/547
• 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: F21S 41/00 Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps reversing lights F21S43/00
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21S 43/195 Details of lamp holders, terminals or connectors
• CPC Class Codes: F21S 45/10 Protection of lighting devices cooling of lighting devices F21S45/40; waterproofing of lighting devices F21S45/50
• CPC Class Codes: F21S 45/48 with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
• CPC Class Codes: F21V 19/0015 Fastening arrangements intended to retain light sources
• CPC Class Codes: F21V 23/007 enclosed in a casing
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The invention describes an LED lighting module (1) comprising an LED element (10), an electronic driving arrangement (30) for driving the LED (11), and a heat sink (20). The heat sink (20) forms a casing for the electronic driving arrangement (30) and comprises a receptacle interface (26) on a front side (F) of the heat sink (20) with a number of first reference elements (27) for coupling the LED element (10) to the heat sink (20) in a defined orientation. The heat sink further comprises a cavity (28) for enclosing at least parts of the electronic driving arrangement (30) and a number of second reference elements (22) for coupling the LED light module (10) to a secondary optic (70,70′). Moreover the invention describes a lighting assembly (80, 80′) comprising such an LED lighting module (1).

Claims

1. An LED lighting module sealingly enclosing an LED device driver, comprising:

an LED mounted on a top wall of an annular heat sink, said heat sink including a depending side wall with a plurality of cooling fins, said cooling fins in thermal contact with said LED;

a recessed cavity formed by said depending sidewall of said annular heat sink;

wherein said recessed cavity receives an LED driver PCB, said LED driver PCB in electrical contact with said LED;

a rear cover enclosing said LED driver PCB within said recess;

wherein said electrical contact between said LED and said LED driver PCB is through contact leads extending from said LED driver PCB through positioning notches on an interface of said heat sink;

said contact leads retained by grooves in a rigid support element extending from said rear cover, through said LED driver PCB and aligned with said notches in said interface, said LED having contact leads extending from said interface to said LED driver PCB contact leads.

2. The LED lighting module of claim 1:

wherein the heat sink has a number of first reference elements for coupling the LED element to the heat sink in a defined orientation,

wherein said rear cover is sealingly mounting to said heat sink about said recess cavity to enclose said PCB, said PCB including an electronic driving arrangement,

a plurality of second reference elements positioned peripherally around said LED coupling the LED light module to a secondary optic.

3. An LED lighting module according to claim 2, where the electronic driving arrangement is attached to the rear cover.

4. An LED lighting module according to claim 2, where the rear cover is rigidly joined to the heat sink element.

5. An LED lighting module according to claim 2, where the rear cover comprises a connector for electrically connecting the LED light module to a power supply.

6. An LED lighting module according to claim 2, where the LED element is electrically connected with the electronic driving arrangement by said contact leads protruding through the heat sink to the front side of the heat sink.

7. An LED lighting module according to claim 2, wherein the rear cover comprises said rigid support elements for electrically connecting the electronic driving arrangement with the LED element or rigid support elements, which mechanically support lead elements between the LED contact leads and the electronic driving arrangement, when the rear cover is assembled with the heat sink.