EP1876384A2 - Appareil d'éclairage - Google Patents

Appareil d'éclairage Download PDF

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Publication number
EP1876384A2
EP1876384A2 EP07110013A EP07110013A EP1876384A2 EP 1876384 A2 EP1876384 A2 EP 1876384A2 EP 07110013 A EP07110013 A EP 07110013A EP 07110013 A EP07110013 A EP 07110013A EP 1876384 A2 EP1876384 A2 EP 1876384A2
Authority
EP
European Patent Office
Prior art keywords
illumination device
led
reflective cover
electrical conductive
leds
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07110013A
Other languages
German (de)
English (en)
Other versions
EP1876384A3 (fr
Inventor
Feng-Li Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gigno Technoogy Co Ltd
Original Assignee
Gigno Technoogy Co Ltd
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 Gigno Technoogy Co Ltd filed Critical Gigno Technoogy Co Ltd
Publication of EP1876384A2 publication Critical patent/EP1876384A2/fr
Publication of EP1876384A3 publication Critical patent/EP1876384A3/fr
Withdrawn legal-status Critical Current

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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
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • 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
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/233—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
    • 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
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • 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
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • 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
    • 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

  • the invention relates to an illumination device and, in particular, to an illumination device using light emitting diodes as its light sources.
  • the light emitting diode is made of semiconductor materials.
  • the LED has two electrode terminals. When a small voltage is imposed to the electrode terminals, energy is released in the form of light through the combinations of electrons and holes.
  • the manufacturing processes and materials of the LED have been continuously improved in recent years to enhance the light-emitting efficiency thereof.
  • the LED Unlike the usual incandescent lamp, the LED involves cold light emissions and thus has the advantages of low power consumption, long device lifetime, no warm-up time, and fast response. Its applications include normal displays, indicators, as well as illumination nowadays.
  • the LED is used in flashlights, illumination devices in the headlights of vehicles, and indoor illumination.
  • FIG. 2 shows a schematic cross section of an LED disposed on a circuit board.
  • the conventional LED illumination device 1 includes a lamp base 11, a circuit board 12, a plurality of LEDs 13, a plurality of lenses 14, and a heat-dissipating device 15.
  • the lamp base 11 is fixed on the heat-dissipating device 15.
  • the circuit board 12 drives the LEDs 13 to emit light.
  • the circuit board 12 is disposed inside the lamp base 11.
  • the LEDs 13 are disposed on the circuit board 12.
  • Each of the lenses 14 is fixed above the corresponding LED 13 by using a fixing component 16 in order to produce better illumination.
  • Heat dissipation has been a problem for the LEDs 13 as a light source. As the illumination time becomes longer, the temperature of the illumination device 1 increases because the imperfect electro-optical conversion of the LEDs 13. If the heat inside the illumination device 1 is not immediately removed, the light-emitting efficiency of the LEDs 13 will be affected. This may even shorten the lifetime of the LEDs 13.
  • the lamp base 11 is directly fixed on a huge heat-dissipating device 15 to help removing heat produced by the LEDs 13. However, this renders the illumination device 1 a huge volume. In subsequent assembly, the heat-dissipating device 15 may be disposed inside a closed shell. This does not only lower the heat dissipation efficiency, but also affects the light-emitting quality and lifetime of the illumination device 1.
  • the invention is to provide an illumination device with good heat dissipation ability.
  • an illumination device including a reflective cover, at least one light-emitting diode (LED), a first electrical conductive body and a second electrical conductive body.
  • the reflective cover has an opening, and the LED is disposed at the opening.
  • the first electrical conductive body has a first end electrically coupled to the LED.
  • the second electrical conductive body has a first end electrically coupled to the LED.
  • the LEDs are disposed at the opening of the reflective cover, and the light emitted by the LEDs travels toward the reflective cover.
  • the invention changes the positions and light-emitting direction of the LEDs.
  • the LEDs can be exposed to the air for more direct heat dissipation. This helps stabilizing the light-emitting efficiency and elongating the lifetime of the LEDs.
  • the heat fins can be formed on the frame or the reflective cover to help removing heat produced by the LEDs.
  • FIG. 1 is a three-dimensional view of a conventional illumination device
  • FIG. 2 shows the cross section of the LED and lens along the A-A line in FIG. 1;
  • FIG. 3 shows the cross section of an illumination device according to a preferred embodiment of the invention
  • FIG. 4 is a bottom view of the illumination device as viewed from an observer.
  • FIG. 5 shows a cross section of another illumination device according to the preferred embodiment of the invention.
  • an illumination device 2 includes a reflective cover 21, at least one LED 22, a first electrical conductive body 23, and a second electrical conductive body 24.
  • the reflective cover 21 has an opening 211, and the surface of the opening 211 is coated with a reflective layer 212.
  • the reflective layer 212 is a metal or dielectric coating with high reflectivity to reflect light.
  • the shape of the reflective cover 21 can be designed according to needs.
  • the reflective cover 21 may be designed to have a bowl or cylinder shape.
  • the cross section of the reflective cover 21 has an arc shape.
  • the LED 22 is disposed at the opening 211.
  • the number of the LEDs 22 is not restricted.
  • the illumination device 2 may further includes a lens 25.
  • the drawing shows several lenses 25 disposed adjacent to the LEDs 22 to form a lens array.
  • the material of the lenses 25 can be glass or plastic. With the lenses 25, the path of the light emitted by each LED 22 can be changed so that the LEDs 22 disposed at the opening 211 do not block the reflected lights from the reflective cover 21.
  • a first end of the first electrical conductive body 23 is electrically coupled to the LEDs 22 through, for example, the circuit substrate S.
  • a first end of the second electrical conducive body 24 is also electrically coupled to the LEDs 22 through, for example, the circuit substrate S.
  • the first electrical conductive body 23 and the second electrical conductive body 24 are coupled to different electrodes of the LEDs 22.
  • the first electrical conductive body 23 is electrically coupled to the p electrodes of the LEDs 22.
  • the second electrical conductive body 24 is electrically coupled to the n electrodes of the LEDs 22.
  • the first electrical conductive body 23 and the second electrical conductive body 24 can respectively be a metal layer (covered with an insulating protection layer outside) or a wire to achieve the electrical coupling.
  • the heat produced by the LEDs 22 can be dissipated by air convection as the LEDs 22 are directly exposed to the air instead of combined with a lamp base. This effectively stabilizes the light-emitting efficiency of the LEDs and elongates their lifetime.
  • the illumination device 2 further includes a frame 26 disposed at the opening 211.
  • the frame 26 supports the circuit substrate S and thus the LEDs 22.
  • the shape of the frame 26 is, for example but not limited to, the structure shown in FIG. 4. Therefore, a second end of the first electrical conductive body 23 can be disposed along the frame 26 to reach an outer surface 213 of the reflective cover 21.
  • a second end of the second electrical conductive body 24 is also disposed along the frame 26 to reach the outer surface 213 of the reflective cover 21.
  • the frame 26 can be made of a thermally conductive material such as a metal.
  • the frame 26 may be formed with several heat fins 261 at the conjunction of the frame 26 and the LEDs 22.
  • the heat fins 261 can be integrally formed (e.g., by stamping) with the trisecting bars of the frame 26.
  • the heat fins 261 can be manufactured separately and then combined with the frame 26 to enhance heat dissipation of the LEDs 22. Since the LEDs 22 and the heat fins 261 are all exposed to the air, the heat can be readily removed.
  • the illumination device 2 may further include a conversion unit 27 disposed on the outer surface 213 of the reflective cover 21.
  • the conversion unit 27 can accommodate a driving control circuit board 271 of the LEDs 22.
  • the driving control circuit board 271 has at least one converter or a DC-AC inverter for driving the LEDs 22 to emit light.
  • the second ends of the first electrical conductive body 23 and the second electrical conductive body 24 are electrically coupled to the driving control circuit board 271, respectively.
  • the conversion unit 27 further includes an electrical conductive connector 272, which has a screw thread.
  • the illumination device 2 can be fixed and electrically coupled to a lamp base, which is similar to the case of a light bulb.
  • the reflective cover 21 of the illumination device 2 may include several heat fins 214 disposed on an outer surface 213 of the reflective cover 21 to help dissipating heat.
  • the LEDs are disposed at the opening of the reflective cover, and the light emitted by the LEDs travels toward the reflective cover.
  • the invention changes the positions and light-emitting direction of the LEDs.
  • the LEDs can be exposed to the air for more direct heat dissipation. This helps stabilizing the light-emitting efficiency and elongating the lifetime of the LEDs.
  • the heat fins can be formed on the frame or the reflective cover to help removing heat produced by the LEDs.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP07110013A 2006-07-07 2007-06-11 Appareil d'éclairage Withdrawn EP1876384A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2006100984932A CN101101090A (zh) 2006-07-07 2006-07-07 照明装置

Publications (2)

Publication Number Publication Date
EP1876384A2 true EP1876384A2 (fr) 2008-01-09
EP1876384A3 EP1876384A3 (fr) 2010-03-10

Family

ID=38197871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07110013A Withdrawn EP1876384A3 (fr) 2006-07-07 2007-06-11 Appareil d'éclairage

Country Status (2)

Country Link
EP (1) EP1876384A3 (fr)
CN (1) CN101101090A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20102154A1 (it) * 2010-11-22 2012-05-23 Reggiani Illuminazione Dispositivo di illuminazione a led con mezzi di ancoraggio.
EP2251587A4 (fr) * 2008-03-13 2012-11-21 Thermoking Technology Internat Co Dispositif d'eclairage a semi-conducteurs et procede associe
CN103016974A (zh) * 2011-09-22 2013-04-03 三星电子株式会社 照明装置
RU2604660C2 (ru) * 2011-04-29 2016-12-10 Конинклейке Филипс Н.В. Светодиодное осветительное устройство с нижней теплорассеивающей конструкцией

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201448633U (zh) * 2009-04-30 2010-05-05 华南师范大学 一种led照明灯

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20002565U1 (de) * 2000-02-14 2001-06-28 Zumtobel Staff Ges.M.B.H., Dornbirn Leuchtdiodenanordnung mit Reflektor
US6578998B2 (en) * 2001-03-21 2003-06-17 A L Lightech, Inc. Light source arrangement
WO2004097293A1 (fr) * 2003-04-30 2004-11-11 Lighting Innovation Center Ag Support destine a une lampe et tete de lampe comportant un support et un reflecteur
EP2270384A3 (fr) * 2004-03-05 2011-02-16 OSRAM Gesellschaft mit beschränkter Haftung Lampe
DE102004042186B4 (de) * 2004-08-31 2010-07-01 Osram Opto Semiconductors Gmbh Optoelektronisches Bauelement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251587A4 (fr) * 2008-03-13 2012-11-21 Thermoking Technology Internat Co Dispositif d'eclairage a semi-conducteurs et procede associe
ITMI20102154A1 (it) * 2010-11-22 2012-05-23 Reggiani Illuminazione Dispositivo di illuminazione a led con mezzi di ancoraggio.
RU2604660C2 (ru) * 2011-04-29 2016-12-10 Конинклейке Филипс Н.В. Светодиодное осветительное устройство с нижней теплорассеивающей конструкцией
US9995438B2 (en) 2011-04-29 2018-06-12 Lumileds Llc LED lighting device with lower heat dissipating structure
EP2702315B1 (fr) * 2011-04-29 2018-06-13 Koninklijke Philips N.V. Dispositif d'éclairage à del présentant une structure de dissipation de chaleur inférieure
CN103016974A (zh) * 2011-09-22 2013-04-03 三星电子株式会社 照明装置

Also Published As

Publication number Publication date
CN101101090A (zh) 2008-01-09
EP1876384A3 (fr) 2010-03-10

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