Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V3/00—Globes; Bowls; Cover glasses
  • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/50—Cooling arrangements
  • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
  • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
  • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
  • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
  • F21V29/86—Ceramics or glass
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
  • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2115/00—Light-generating elements of semiconductor light sources
  • F21Y2115/10—Light-emitting diodes [LED]

Definitions

• This application is related to LED lighting, and more specifically to reflector and heat sink assemblies for LED lighting.
• LED Lighting is becoming as efficient as fluorescent lighting and also price competitive.
• technological challenges for the construction of LED arrangements that are unique to the technology and not changeable.
• Prior art includes LEDs that have a diffusion lens built into the LED body of a round nature and others that have LEDs on a strip with a flat surface.
• the current invention can be applied to both technologies.
• the current invention allows significantly better heat dissipation as well as better thermal junction performance.
• LED refers to light source components which include one or more light emitting diode; to lighting modules which include one or more such light source components; and to lighting systems which include a plurality of such lighting modules.
• LED light source refers to one or more light emitting diode and to the combination of a light emitting diode with a diffuser.
• LED assembly refer to one or more LED light source component in combination with a heat sink and a conductive glass cover element.
• top and bottom are relative to an upwards-facing orientation where the heat sink is below the LED light source.
• the assembly may be used in that upwards-facing orientation where light is emitted in an upward direction; or in a downwards-facing orientation such as a ceiling light fixture where light is emitted in a downward direction; or in applications such as billboard lighting where the assembly is provided at an angle relative to a horizontal reference.
• a heat conductive glass is used as a cover plate for the LED, and mechanically secured to a reflector heat sink to improve the LED cooling capability and to increase light emission surface.
• the increased emission surface reduces glare.
• one of more sections of spring wire are inserted into holes in the reflector in a manner that provides a compressive force to hold the heat conductive glass against the LED.
• an LED or a group of LEDs can be pressed, by the glass, against a cooling heat sink to allow optimal junction contact;
• a junction resistance improving substance can be added (i.e. aluminum chemical weld);
• the glass can be used to diffuse LED generated light as required by the application.
• FIG. IA is a top perspective view of an example embodiment of a heat sink reflector, an LED light source, and a a heat conductive glass cover plate held in place by two sections of stainless steel spring wire.
• FIG. IB is a side perspective view of the embodiment of FIG. IA.
• FIG. 2 A is a side view of another example embodiment of a heat sink reflector, an LED light source, and a a heat conductive glass cover plate held in place by a plurality of sections of stainless steel spring wire.
• FIG. 2B is a top view of the embodiment of FIG. 2A.
• FIG. 3 is a cross section schematic of a fixture with an LED light source with a diode and diffuser, a heat conductive glass cover plate, and a diffusing lens.
• FIG. IA is a top perspective view and FIG. IB is a side perspective view of an example embodiment of a heat sink reflector 130, an LED light source 120, and a a heat conductive glass cover plate 140 held in place by hold down elements 150 comprising two sections of stainless steel spring wire 152.
• the reflector heat sink includes a first and second upward- oriented sides 132 and 134.
• the spring wire sections are inserted into holes 133 and 135 in the sides of the reflector heat sink.
• the heat sink may have a variety of holes to permit various thicknesses of LED light sources or cover plates.
• the LED light source includes one or more diodes covered by a single flat fine diffusing lens 125.
• the heat conductive glass cover plate 140 has a surface area of 2 to 5 times larger than the surface area of the diffusing lens.
• the planar heat conductive glass element 140 may be a IndustrexTM glass having a thickness in the range of about 1/16 to 3/16 inch ( 1.6 to 4.8 mm) with a top surface and a bottom surface, where the top surface of the heat conductive glass element has an area in a range of about 2-10 5 times larger than the diffuser of the LED light source.
• a heat conductive glass element with a thickness of about 1/8 inch (3.2 mm) and an area of 5 times the LED diffuser area has worked well.
• a 20 gage Type 302 stainless steel spring wire material with a diameter 0.032 inch (0.8 mm) has worked effectively as a hold-down element.
• other hold-down elements may be used, such as a spring.
• FIG. 2A is a side view of another example embodiment of a heat sink reflector 130, an LED light source 120, and a a heat conductive glass cover plate 140 held in place by a plurality of sections of stainless steel spring wire.
• FIG. 2B is a top view of the embodiment of FIG. 2A.
• FIG. 3 is a cross section schematic of a portion of a light fixture 80 with an LED light source 120 with a diode 122 and diffuser 124, a heat conductive glass cover plate 140, and a diffusing lens 82.
• Prior art LED light sources typically provide a diode and a diffuser.
• Prior art LED light fixtures typically provide a plurality of relatively small LEDs mounted on a heat sink reflector, and provide a large diffusing lens 82 which is spaced apart from the LED light sources. The use of multiple LEDs helps to reduce glare.
• one or more LEDs are mounted on a heat sink reflector, and a large diffusing lens 82 is provided. Additional light diffusion is provided by the heat conductive glass cover plate 120 which has a surface area of 2 to 5 times the surface area of the LED diffuser 124. This large cover plate helps to lessen the point-source "harshness" of the LED light source(s) and diffuse the light before it reaches an optional fixture diffusing lens 82.
• the diffusion can be further enhanced by providing a diffusion pattern on the top surface of the heat conductive glass cover plate 140.
• the cover plate also reflects or blocks undesirable yellow light which is transmitted out the sides of the LED light source and provides a top-side heat sink for the LED light source(s).
• the cover plate is a 1/8 inch IndustrexTM glass with an upward-facing fine scattering pattern.
• the diffusing lens 82 may be an
• IndustrexTM glass with a fine scattering pattern facing the LED light source is provided.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Ceramic Engineering (AREA)
• Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
• Fastening Of Light Sources Or Lamp Holders (AREA)
• Led Device Packages (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42198488

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (5)

Family Cites Families (7)

• 2009
  • 2009-11-18 WO PCT/US2009/065020 patent/WO2010059748A1/en active Application Filing
  • 2009-11-18 JP JP2011537591A patent/JP5701768B2/ja active Active
• 2014
  • 2014-10-31 JP JP2014222455A patent/JP5921640B2/ja active Active

Patent Citations (5)

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