WO2010143144A2 - An led lamp - Google Patents

An led lamp Download PDF

Info

Publication number
WO2010143144A2
WO2010143144A2 PCT/IB2010/052564 IB2010052564W WO2010143144A2 WO 2010143144 A2 WO2010143144 A2 WO 2010143144A2 IB 2010052564 W IB2010052564 W IB 2010052564W WO 2010143144 A2 WO2010143144 A2 WO 2010143144A2
Authority
WO
WIPO (PCT)
Prior art keywords
base plate
reflector
led lamp
circuit board
heat sink
Prior art date
Application number
PCT/IB2010/052564
Other languages
French (fr)
Other versions
WO2010143144A3 (en
Inventor
Otto Horlacher
Original Assignee
Otto Horlacher
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Otto Horlacher filed Critical Otto Horlacher
Publication of WO2010143144A2 publication Critical patent/WO2010143144A2/en
Publication of WO2010143144A3 publication Critical patent/WO2010143144A3/en

Links

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
    • 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
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • 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 invention relates to a lamp of the kind using one or more light emitting diodes (LEDs) as a light source.
  • LEDs light emitting diodes
  • an LED lamp including a reflector connected to a base plate, the base plate extending across an inner end of the reflector and a printed circuit board carrying an LED light source mounted to the base plate, with the reflector and base plate made from heat conductive material to provide a heat sink.
  • the invention further provides for the reflector to be outwardly curved; and for the base plate to have a passage to accommodate an electric cable to the printed circuit board.
  • a further feature of the invention provides for the reflector and base plate to be integral.
  • an additional body of heat conductive material to be fixed on the side of the base plate opposite to the LED light source; and for the body to include a passage to accommodate the electric cable.
  • the reflector, base plate and body will be manufactured from aluminum or some other suitable metal or alloy. Further features of the invention provide for the metal surface on the inside of the reflector is polished aluminum; and for the metal surface on the outside of the reflector is anodized aluminum. Where positive and negative terminals are spaced apart on the printed circuit board, the base plate will have two correspondingly spaced apertures to accommodate each of a pair of electrical supply cables. A pair of suitable openings in the body will also be provided.
  • the invention extends to a reflector for use with an LED lamp as defined above.
  • Figures 1 and 2 are respectively schematic part cross-sectional and side views of one embodiment of one form of an LED lamp
  • FIGS 3 and 4 are similar views of another form of LED lamp.
  • Figures 5 and 6 are similar views of yet another form of LED lamp without the mounting arrangement.
  • an LED lamp in accordance with this invention is indicated generally by reference numeral (1 ).
  • the lamp (1 ) includes a part ellipsoidal, outwardly curved reflector (2) with an integral base plate (3).
  • the base plate (3) is located across an inner end of the reflector (2).
  • the inner end of the reflector (2) is completely sealed save for two spaced apart passages (not shown) in the base plate (3). These provide apertures that are sized and located to accommodate a pair of electric cables (not shown). These cables are respectively connected to positive and negative terminals on a printed circuit board (4).
  • the printed circuit board (4) is mounted against the base plate (3).
  • the passages (3) match the location of the terminals to facilitate the flush fitting of these components (3) and (4) against each other.
  • the printed circuit board (4) carries an LED light source (5).
  • the reflector (2) and base plate (3) are made from heat conductive material. This will preferably be polished and anodized aluminum but any suitable metal with the required properties of heat conductivity can be used.
  • the reflector (2) and base plate (3) provide a heat sink for dissipation of heat emitted by the LED light source (5) and can be made as an integral unit.
  • the reflector (2) with base (3) will be spun from high purity aluminum and polished with an anti-glare, non tarnish finish.
  • An additional heat conductive body (6) is mounted on the side of the base plate (3) opposite to the LED light source (5).
  • the body (6) will also be made of aluminum or other suitable heat conductive material. This extension provides a heat sink assembly with additional capacity for dissipation of heat generated by the lamp (1 ) in use.
  • the surfaces of the heat sink components may be anodized but the inside of the reflector (2) component will be polished or provided with a suitable coating to give the required reflection of light from the LED light source (5).
  • the lamp (1 ) will include the usual other components necessary for lamps of this kind.
  • the invention avoids the use of a collimator and provides a reflector (2) which serves as a heat sink to dissipate the heat generated by the LED light source (5).
  • the heat sink assembly provided by components (2), (3) and (6) also makes efficient use of the space available around the LED light source (5) in the lamp (1 ). This can be particularly advantageous where LED lamps are used as retrofit options in place of incandescent lights.
  • the lamp (1 ) may be used in mountings of any of a number of configurations.
  • the components of the lamp (1 ) can similarly be varied in their configuration - particularly for adaption to different fittings serving different functions.
  • the mounting of the lamp (1 ) within a housing or fitting will be within the design competence of one suitably skilled in the art.

Abstract

The invention provides an LED lamp (1 ) including an outwardly curved reflector (2) connected to a base plate (3). The base plate (3) extends across an inner end of the reflector (2) and a printed circuit board (4) carrying an LED light source is mounted to the base plate. The reflector (2) and base plate (3) are preferably made as an integral component from heat conductive material to provide a heat sink. An additional body (6) of heat sink material is fixed to the side of the base plate (3) opposite the circuit board (4).

Description

AN LED LAMP
FIELD OF THE INVENTION
This invention relates to a lamp of the kind using one or more light emitting diodes (LEDs) as a light source.
BACKGROUND TO THE INVENTION
The lighting industry has long since turned to LEDs as a more energy efficient alternative light source. The ongoing progress and development of LEDs has been significant. Where previously the lower levels of light emitted had been a disadvantage, LEDs are now being produced which can compete with the light levels of the less efficient products used previously.
The optimal current required to drive LEDs for maximum light output results in the generation of a significant amount of heat. One of the main problems with LED lamps remains the dissipation of heat - often in confined spaces. OBJECT OF THE INVENTION
It is an object of the current invention to provide an LED lamp which includes means to deal with dissipation of heat.
SUMMARY OF THE INVENTION
In accordance with this invention there is provided an LED lamp including a reflector connected to a base plate, the base plate extending across an inner end of the reflector and a printed circuit board carrying an LED light source mounted to the base plate, with the reflector and base plate made from heat conductive material to provide a heat sink.
The invention further provides for the reflector to be outwardly curved; and for the base plate to have a passage to accommodate an electric cable to the printed circuit board.
A further feature of the invention provides for the reflector and base plate to be integral.
Further features of the invention provide for an additional body of heat conductive material to be fixed on the side of the base plate opposite to the LED light source; and for the body to include a passage to accommodate the electric cable.
The reflector, base plate and body will be manufactured from aluminum or some other suitable metal or alloy. Further features of the invention provide for the metal surface on the inside of the reflector is polished aluminum; and for the metal surface on the outside of the reflector is anodized aluminum. Where positive and negative terminals are spaced apart on the printed circuit board, the base plate will have two correspondingly spaced apertures to accommodate each of a pair of electrical supply cables. A pair of suitable openings in the body will also be provided.
The invention extends to a reflector for use with an LED lamp as defined above.
BRIEF DESCRIPTION OF THE DRAWING
These and other features of the invention are described below, by way of example only, with reference to the accompanying drawings, in which:
Figures 1 and 2 are respectively schematic part cross-sectional and side views of one embodiment of one form of an LED lamp;
Figures 3 and 4 are similar views of another form of LED lamp; and
Figures 5 and 6 are similar views of yet another form of LED lamp without the mounting arrangement.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings, an LED lamp in accordance with this invention is indicated generally by reference numeral (1 ).
The lamp (1 ) includes a part ellipsoidal, outwardly curved reflector (2) with an integral base plate (3). The base plate (3) is located across an inner end of the reflector (2).
The inner end of the reflector (2) is completely sealed save for two spaced apart passages (not shown) in the base plate (3). These provide apertures that are sized and located to accommodate a pair of electric cables (not shown). These cables are respectively connected to positive and negative terminals on a printed circuit board (4).
The printed circuit board (4) is mounted against the base plate (3). The passages (3) match the location of the terminals to facilitate the flush fitting of these components (3) and (4) against each other. The printed circuit board (4) carries an LED light source (5).
The reflector (2) and base plate (3) are made from heat conductive material. This will preferably be polished and anodized aluminum but any suitable metal with the required properties of heat conductivity can be used.
The reflector (2) and base plate (3) provide a heat sink for dissipation of heat emitted by the LED light source (5) and can be made as an integral unit. In particular, the reflector (2) with base (3) will be spun from high purity aluminum and polished with an anti-glare, non tarnish finish.
An additional heat conductive body (6) is mounted on the side of the base plate (3) opposite to the LED light source (5). The body (6) will also be made of aluminum or other suitable heat conductive material. This extension provides a heat sink assembly with additional capacity for dissipation of heat generated by the lamp (1 ) in use.
The surfaces of the heat sink components may be anodized but the inside of the reflector (2) component will be polished or provided with a suitable coating to give the required reflection of light from the LED light source (5).
It will be understood that the lamp (1 ) will include the usual other components necessary for lamps of this kind. The invention however avoids the use of a collimator and provides a reflector (2) which serves as a heat sink to dissipate the heat generated by the LED light source (5).
The heat sink assembly provided by components (2), (3) and (6) also makes efficient use of the space available around the LED light source (5) in the lamp (1 ). This can be particularly advantageous where LED lamps are used as retrofit options in place of incandescent lights.
The two embodiments illustrated in Figures 1 to 4 show lamps (1 ) in a housing (7) for a ceiling mounted spot light. It will however be appreciated that the lamps
(1 ) may be used in mountings of any of a number of configurations. The components of the lamp (1 ) can similarly be varied in their configuration - particularly for adaption to different fittings serving different functions. The mounting of the lamp (1 ) within a housing or fitting will be within the design competence of one suitably skilled in the art.
A further embodiment is illustrated in Figures 5 and 6. This shows the reflector
(2) used in combination with a collimator lens.

Claims

1. An LED lamp including a reflector connected to a base plate, the base plate extending across an inner end of the reflector and a printed circuit board carrying an LED light source mounted to the base plate, with the reflector and base plate made from heat conductive material to provide a heat sink.
2. An LED lamp as claimed in claim 1 in which an electrical cable connection passage is provided through the base plate.
3. An LED lamp as claimed in claim 1 or 2 in which the reflector and base plate are integral.
4. An LED lamp as claimed in claim 2 or 3 in which an additional body of heat sink material is fixed to the side of the base plate opposite the circuit board.
5. An LED lamp as claimed in claim 4 in which the body has a passage therethrough aligned with the connection passage.
6. An LED lamp as claim in any one of claims 2 to 5 in which a pair of passages are provided to provide for separate cable connections.
7. An LED lamp as claimed in claim 4 in which the reflector, base plate and body are manufactured from suitable metal material.
8. An LED lamp as claimed in claim 7 in which the metal surface on the inside of the reflector is polished aluminum.
9. An LED lamp as claimed in claim 7 or claim 8 in which the metal surface on the outside of the reflector is anodized aluminum.
10. A reflector for use with an LED lamp as claimed in any one of the preceding claims.
PCT/IB2010/052564 2009-06-10 2010-06-09 An led lamp WO2010143144A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200904050 2009-06-10
ZA2009/04050 2009-06-10

Publications (2)

Publication Number Publication Date
WO2010143144A2 true WO2010143144A2 (en) 2010-12-16
WO2010143144A3 WO2010143144A3 (en) 2011-02-24

Family

ID=43309293

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/052564 WO2010143144A2 (en) 2009-06-10 2010-06-09 An led lamp

Country Status (2)

Country Link
WO (1) WO2010143144A2 (en)
ZA (1) ZA201003145B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7213940B1 (en) * 2005-12-21 2007-05-08 Led Lighting Fixtures, Inc. Lighting device and lighting method
US20080037258A1 (en) * 2006-08-08 2008-02-14 Tera Autotech Corporation LED lamp assembly
US20080055909A1 (en) * 2006-09-01 2008-03-06 Jia-Hao Li Method for Combining LED Lamp and Heat Dissipator and Combination Structure thereof
WO2008108574A1 (en) * 2007-03-06 2008-09-12 Gwang Sung Lighting Industry Co., Ltd. Lamp with light emitting diodes using alternating current
CN201184519Y (en) * 2008-02-21 2009-01-21 浙江古越龙山电子科技发展有限公司 High power light-emitting diode barrel lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7213940B1 (en) * 2005-12-21 2007-05-08 Led Lighting Fixtures, Inc. Lighting device and lighting method
US20080037258A1 (en) * 2006-08-08 2008-02-14 Tera Autotech Corporation LED lamp assembly
US20080055909A1 (en) * 2006-09-01 2008-03-06 Jia-Hao Li Method for Combining LED Lamp and Heat Dissipator and Combination Structure thereof
WO2008108574A1 (en) * 2007-03-06 2008-09-12 Gwang Sung Lighting Industry Co., Ltd. Lamp with light emitting diodes using alternating current
CN201184519Y (en) * 2008-02-21 2009-01-21 浙江古越龙山电子科技发展有限公司 High power light-emitting diode barrel lamp

Also Published As

Publication number Publication date
ZA201003145B (en) 2010-10-27
WO2010143144A3 (en) 2011-02-24

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