HEAT SINK FOR LED LIGHT SOURCE

• US 20140029259A1
• Filed: 03/15/2013
• Published: 01/30/2014
• Est. Priority Date: 07/30/2012
• Status: Active Grant

• Current Assignee: Ultravision Technologies, LLC (Ultravision International Inc.)
• Original Assignee: Ultravision Holdings, LLC
• Inventors: AUYEUNG, DAVID SIUCHEONG
• Granted Patent: US 8,974,077 B2
• Time in Patent Office: Days
• US Class Current: 362/249.02
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21S 6/006 for direct lighting only, e.g. task lighting
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 21/26 Pivoted arms
• CPC Class Codes: F21V 23/002 Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
• CPC Class Codes: F21V 29/00 Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems lighting fixtures combined with outlets for air-treatment systems F24F13/078
• CPC Class Codes: F21V 29/15 Thermal insulation
• CPC Class Codes: F21V 29/503 of light sources cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H01L33/64
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• 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 29/763 the planes containing the fins or blades having the direction of 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: F21V 29/89 Metals
• CPC Class Codes: F21V 31/00 Gas-tight or water-tight arrangements
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21V 33/00 Structural combinations of lighting devices with other articles, not otherwise provided for
• CPC Class Codes: F21V 5/007 Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane combination of two or more refractors F21V5/008
• CPC Class Codes: F21W 2131/10 Outdoor lighting
• CPC Class Codes: F21W 2131/40 : Lighting for industrial, commercial, recreational or military use
• CPC Class Codes: F21Y 2105/10 : comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 : characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2105/16 : square or rectangular, e.g. for light panels
• CPC Class Codes: F21Y 2115/10 : Light-emitting diodes [LED]
• CPC Class Codes: G02B 19/0014 : at least one surface having optical power
• CPC Class Codes: G02B 19/0028 : refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 : the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00
• CPC Class Codes: G02B 19/0066 : in the form of an LED array
• CPC Class Codes: G09F 13/02 : Signs, boards, or panels, illuminated by artificial light sources positioned in front of the insignia
• CPC Class Codes: G09F 13/22 : electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: G09F 15/00 : Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
• CPC Class Codes: G09F 15/0037 : supported by a post
• CPC Class Codes: G09F 15/005 : for orientation or public information
• CPC Class Codes: G09F 2013/222 : with LEDs

Abstract

A back panel for use in a light emitting diode (LED) lighting assembly is disclosed. An extruded substrate formed of a thermally conductive material is provided, the substrate having a plurality of fins extending from a first side of the substrate, each of the fins having a substantially rectangular shape oriented so that a longitudinal axis of the fin is substantially parallel to a longitudinal axis of the substrate. At least some of the fins include a hole formed through the fin to enable heated air to rise through the fins. A plurality of LEDs are mounted on a second side of the substrate, and oriented in a longitudinal orientation with the fins oriented parallel to the bottom edge of a surface to be illuminated, such that heat rises perpendicular to the surface of the fin.

Claims

1. A back panel for use in a light emitting diode (LED) lighting assembly comprising:

an extruded substrate formed of a thermally conductive material, the substrate having a plurality of fins extending from a first side of the substrate, each of the fins having a substantially rectangular shape oriented so that a longitudinal axis of the fin is substantially parallel to a longitudinal axis of the substrate, wherein at least some of the fins include a hole formed through the fin to enable heated air to rise through the fins, wherein a plurality of LEDs are mounted on a second side of the substrate, and oriented in a longitudinal orientation with the fins oriented parallel to the bottom edge of a surface to be illuminated, such that heat rises perpendicular to the surface of the fin.

2. The back panel of claim 1, wherein an LED structure is mounted on the second side thereof.

3. The back panel of claim 2, and further comprising a protrusion running parallel to the axis of the fins and disposed at a first edge of the LED structure to cause water to be partially directed away therefrom.

4. The back panel of claim 3, and further comprising a second protrusion along a second edge of the LED structure and opposite the first edge.

5. The back panel of claim 2, wherein the surface of the substrate is oriented substantially perpendicular to the surface of the earth.

6. The back panel of claim 6, and further comprising a mount to allow the surface of the substrate to have the angle thereof varied.