LIGHTING APPARATUS

• US 20080055915A1
• Filed: 08/08/2007
• Published: 03/06/2008
• Est. Priority Date: 09/22/2003
• Status: Active Grant

• Current Assignee: Permlight Products Inc
• Original Assignee: Permlight Products Inc
• Inventors: Wijesinghe, Rehana, Lynch, Manuel, Fraitag, Lenny
• Granted Patent: US 8,079,731 B2
• Time in Patent Office: Days
• US Class Current: 362/373
• CPC Class Codes: F21S 2/005 of modular construction
• CPC Class Codes: F21S 4/10 with light sources attached to loose electric cables, e.g. Christmas tree lights
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 17/12 by screwing
• CPC Class Codes: F21V 21/02 Wall, ceiling, or floor bases; Fixing pendants or arms to the bases F21V21/08 takes precedence; bases for movable standing lamps F21V21/06
• 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 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 25/04 breaking the electric circuit
• 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 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 3/04 characterised by materials, surface treatments or coatings
• CPC Class Codes: F21V 31/04 Provision of filling media
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting apparatus is provided including an array of light emitting diodes (LEDs) disposed on a base. The base is configured to move heat away from the array of LEDs to other portions of the base and further to the atmosphere or an adjacent housing. In one embodiment, a native oxide on the base electrically insulates the base from the LEDs. In another embodiment, a cover is removably disposed over the array of LEDs, and removal of the cover prevents electrical energization of the LEDs.

Claims

1-34. -34. (canceled)

35. A lighting apparatus, comprising:

a heat conductive base having a surface;

a plurality of contacts supported on the surface of the base, the plurality of contacts comprising a first terminus and a second terminus;

at least one LED disposed on the contacts and arranged so that an electrical pathway is established from the first terminus to the second terminus through the LED;

a housing comprising a heat conductive material, the housing having a housing wall and an opening adjacent the housing wall;

wherein the heat conductive base is arranged in the housing so that the heat conductive base surface engages the housing wall in a manner so that heat from the LED is directed from the LED into the base and from the base surface through the housing wall and into the housing, and the LED is generally aligned with the housing opening.

36. A lighting apparatus as in claim 35, wherein the base comprises a metal.

37. A lighting apparatus as in claim 36, wherein the housing comprises a metal.

38. A lighting apparatus as in claim 37, wherein the housing comprises a plurality of fins.

39. A lighting apparatus as in claim 35, wherein the housing wall is generally complementary to the base surface.

40. A lighting apparatus as in claim 39, wherein the at least one LED is disposed on the base surface generally centrally, and wherein a portion of the base surface generally adjacent one or more edges of the base surface engages the housing wall.

41. A lighting apparatus as in claim 35 additionally comprising a power module adapted to supply electric power between the first terminus and second terminus, wherein the base is attached to the power module.

42. A lighting apparatus as in claim 41, wherein the base has a second surface generally opposite the surface upon which the at least LED is disposed, and the second surface of the base is connected to the power module.

43. A lighting apparatus as in claim 42, wherein the base is connected to the power module by threaded fasteners.

44. A lighting apparatus as in claim 43, wherein the power module comprises first and second threaded power nodes, and a first and a second threaded fastener are electrically conductive and are adapted to threadingly engage the first and second power nodes, respectively, so as to hold the base in a position relative the power module and to electrically connect the first and second nodes to respective ones of the first and second terminus so as to supply electrical power across the electrical pathway when the fasteners are in place.