EP1255948A1 - Ensemble diode electroluminescente dote d'un reflecteur - Google Patents

Ensemble diode electroluminescente dote d'un reflecteur

Info

Publication number
EP1255948A1
EP1255948A1 EP01925323A EP01925323A EP1255948A1 EP 1255948 A1 EP1255948 A1 EP 1255948A1 EP 01925323 A EP01925323 A EP 01925323A EP 01925323 A EP01925323 A EP 01925323A EP 1255948 A1 EP1255948 A1 EP 1255948A1
Authority
EP
European Patent Office
Prior art keywords
reflector
light
light source
opening
emitting diodes
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.)
Granted
Application number
EP01925323A
Other languages
German (de)
English (en)
Other versions
EP1255948B1 (fr
Inventor
Katharina Keller
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.)
ZUMTOBEL LIGHTING GmbH
Original Assignee
Zumtobel Staff GmbH
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 Zumtobel Staff GmbH filed Critical Zumtobel Staff GmbH
Publication of EP1255948A1 publication Critical patent/EP1255948A1/fr
Application granted granted Critical
Publication of EP1255948B1 publication Critical patent/EP1255948B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • 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
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

Definitions

  • the present invention relates to a lamp according to the preamble of claim 1.
  • a generic lamp is known for example from Japanese laid-open publication JP 11-17229.
  • This describes a lighting arrangement in which a single light-emitting diode is arranged within a reflector, so that the light emitted by this light-emitting diode is used for indirect lighting.
  • the arrangement of the light source within a reflector has the advantage that the light emitted by the light-emitting diode in a relatively large solid angle is collected and reflected by the reflector and thus, in comparison to direct illumination by the light-emitting diode, a significantly larger amount of light for the lighting purposes can be used.
  • Such lighting arrangements can be used in optoelectronic components and other display devices because of the very good controllability of the light source.
  • the lighting arrangement described in JP 11-17229 is, however, limited with regard to its possible uses, since the amount of light emitted by the individual diode is not very high and is therefore not sufficient for a number of lighting purposes.
  • the present invention is therefore based on the object of improving the lighting arrangement known from JP 11-7229 in such a way that it is suitable for a large number of possible uses.
  • a lamp which has the features of claim 1.
  • a carrier surface is used as the light source, on which a plurality of light-emitting diodes are arranged.
  • This light source is arranged essentially in the longitudinal axis of a - seen from the light source - concave reflector, so that a large part of the light emitted by the light emitting diodes can be used for the desired lighting purpose.
  • the ratio between the size of the support surface and the opening of the reflector is between 1: 3 and 1:20.
  • the total amount of light is significantly higher than that of a single light-emitting diode.
  • the specified size ratio between the support surface and the reflector is found to be advantageous, since on the one hand sufficiently high luminosities can be achieved in this size range, but on the other hand no shadow casts occur in the light emitted by the reflector due to the support surface arranged in front of or within the reflector.
  • the ratio between the support surface and the opening of the reflector is preferably 1:10.
  • the aforementioned advantage that light-emitting diodes have very good controllability can also be used by arranging light-emitting diodes of different colors together on the support surface.
  • blue light-emitting diodes can also be produced with a relatively high degree of efficiency, so that any desired color tones can be achieved by a suitable combination of these three colors or by correspondingly controlling the light-emitting diodes arranged on the carrier surface.
  • the lamp according to the invention can be used for a variety of applications.
  • a practical embodiment of the invention can therefore consist in that a heat sink is arranged on the back of the carrier surface - that is to say the side opposite the light-emitting diodes - which radiates the generated heat as effectively as possible. Since the weight of the light source is relatively low, the power or control lines for the light-emitting diodes can preferably be used directly to hold the light source. These can span the reflector in the manner of a diameter, for example, so that the light source is arranged essentially in the plane of the reflector opening.
  • the power or control lines used for the holder extend from the inside of the reflector or the center of the reflector in the direction of the reflector opening, so that the distance of the light source from the reflector can be selected.
  • the light source is particularly advantageously in a focal point of the reflector, since this arrangement ensures maximum utilization of the emitted light.
  • Figure 1 shows a lamp according to the invention in a perspective view.
  • 2 shows a more detailed embodiment of the light source according to the invention.
  • Fig. 1 shows a very general embodiment of a lamp according to the invention.
  • An essential element of this lamp is a dome-shaped or concave reflector 1 whose inner walls are highly reflective.
  • a light source 2 is arranged, which consists of a plurality of light-emitting diodes arranged on a support surface.
  • the power supply and the control of the individual light-emitting diodes takes place via current and control lines 5, which span the reflector in diameter from one edge of the reflector opening to the other and at the same time serve as a holder for the light source 2.
  • a particularly advantageous embodiment consists in that the light source 2 is arranged in the focal point of the reflector 1, so that the entire light emitted by the light-emitting diodes in an angular range of 180 ° can be used for the intended lighting purpose.
  • FIG. 2 shows an enlarged illustration of the light source 2 according to the invention.
  • a multiplicity of light-emitting diode chips (dice) 4 are arranged on a carrier surface 3. These can emit light in different colors, so that different colors can be achieved with a suitable control of the light emitting diodes 4 for the light emitted by the lamp as a whole.
  • a heat sink 6 is arranged to increase the heat radiation. This will create a
  • Connection lines 5 serve both the power supply and the transmission of
  • Control signals for the targeted control of the different light-emitting diodes 4 to achieve the desired color are provided.
  • the luminaire Due to the compact arrangement of the light-emitting diode chips, a considerable luminosity can be achieved, so that the luminaire is also suitable for applications in which higher luminosities are required. At the same time, however, the light emitted by the reflector 1 is intended to achieve homogeneous illumination.
  • the size ratio according to the invention between the support surface 3 and the reflector 1 ensures that the light source 2 itself does not cause shadows.
  • the inside of the reflector is that of the Light emitting diodes 4 diffusely reflected light, which also supports mixing of the different colors.
  • the holder shown in Fig. 3a corresponds to the lamp shown in Fig. 1.
  • FIG. 3b An alternative type of suspension is shown in Fig. 3b, in which the power and control lines 5 extend obliquely downwards from the inside of the reflector, which has the advantage that the light source 2 does not necessarily have to be arranged in the plane of the reflector opening, but, for example, can also be arranged further inside the reflector 1 or even protruding.
  • the third holder shown in FIG. 3c in which the light source 2 is formed by a rod-shaped holder 5 which extends from the center of the reflector along the longitudinal axis of the reflector 1 and which can likewise contain the power and control lines.
  • the distance between the light source 2 and the reflector 1 is adjustable, so that the light cone generated by the reflector 1 can be changed by moving it along the longitudinal axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

Dispositif d'éclairage doté d'une source de lumière (2) qui comporte au moins un semi-conducteur émetteur de lumière ainsi que d'un réflecteur concave (1) lorsqu'il est vu depuis la source de lumière (2), ladite source de lumière (2) étant placée essentiellement dans l'axe longitudinal du réflecteur (1). Selon la présente invention, la source de lumière (2) est composée d'une pluralité de diodes électroluminescentes (4) pouvant être commandées, placées sur une surface de support (3), le rapport entre la surface de support (3) et l'ouverture du réflecteur (1) étant de 1/3 à 1/20.
EP01925323A 2000-02-14 2001-01-29 Ensemble diode electroluminescente dote d'un reflecteur Expired - Lifetime EP1255948B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20002565U 2000-02-14
DE20002565U DE20002565U1 (de) 2000-02-14 2000-02-14 Leuchtdiodenanordnung mit Reflektor
PCT/EP2001/000934 WO2001059359A1 (fr) 2000-02-14 2001-01-29 Ensemble diode electroluminescente dote d'un reflecteur

Publications (2)

Publication Number Publication Date
EP1255948A1 true EP1255948A1 (fr) 2002-11-13
EP1255948B1 EP1255948B1 (fr) 2008-03-12

Family

ID=7937254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01925323A Expired - Lifetime EP1255948B1 (fr) 2000-02-14 2001-01-29 Ensemble diode electroluminescente dote d'un reflecteur

Country Status (6)

Country Link
US (1) US6857763B2 (fr)
EP (1) EP1255948B1 (fr)
AT (1) ATE389143T1 (fr)
AU (1) AU2001252121A1 (fr)
DE (2) DE20002565U1 (fr)
WO (1) WO2001059359A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3199870A3 (fr) * 2016-01-27 2017-11-08 ELPRO Lichttechnik GmbH Lampe électrique

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* Cited by examiner, † Cited by third party
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DE10105622A1 (de) * 2001-02-08 2002-08-14 Insta Elektro Gmbh Beleuchtungseinrichtung
DE10109997A1 (de) * 2001-03-01 2002-09-05 Diemer & Fastenrath Gmbh & Co Leseleuchte für ein Fahrzeug, insbesondere für ein Kraftfahrzeug
DE10311853B4 (de) * 2003-03-17 2005-03-24 Daimlerchrysler Ag Scheinwerfer für ein Fahrzeug
WO2005085706A1 (fr) * 2004-03-05 2005-09-15 Patent-Treuhand Gesellschaft Für Elektrische Glühlampen Mbh Lampe
KR101303364B1 (ko) 2005-02-02 2013-09-03 코닌클리즈케 필립스 일렉트로닉스 엔.브이. 광원 모듈, 홀더 및 광학 시스템
US7850345B2 (en) * 2005-08-17 2010-12-14 Illumination Management Solutions Inc. Optic for LEDs and other light sources
CN101101090A (zh) * 2006-07-07 2008-01-09 启萌科技有限公司 照明装置
EP1985912B1 (fr) * 2007-04-26 2017-06-07 Frowein EZH GmbH Lampe chirurgicale
DE102007030186B4 (de) * 2007-06-27 2009-04-23 Harald Hofmann Lineare LED-Lampe und Leuchtensystem mit derselben
TW200925513A (en) * 2007-12-11 2009-06-16 Prodisc Technology Inc LED lamp structure for reducing multiple shadows
CA2718063A1 (fr) * 2008-03-13 2009-09-17 Thermoking Technology International Co. Dispositif d'eclairage a semi-conducteurs et procede associe
DE102008031987A1 (de) 2008-07-07 2010-04-15 Osram Gesellschaft mit beschränkter Haftung Leuchtvorrichtung
US7824068B2 (en) * 2008-11-28 2010-11-02 Wulfinghoff Donald R Lighting fixtures and systems with high energy efficiency and visual quality
US8568000B2 (en) * 2011-08-29 2013-10-29 Tai-Her Yang Annular-arranged lamp capable of backward projecting by concave sphere
DE102012020931B4 (de) 2012-10-25 2022-10-20 Rüdiger Lanz Hochleistungsscheinwerfer mit Hochleistungs-LED-Leuchtmittel
CN103062684A (zh) * 2013-01-07 2013-04-24 威海大荣新能源开发有限公司 一种用于教学场所的荧光灯具

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3199870A3 (fr) * 2016-01-27 2017-11-08 ELPRO Lichttechnik GmbH Lampe électrique

Also Published As

Publication number Publication date
US6857763B2 (en) 2005-02-22
DE20002565U1 (de) 2001-06-28
US20020191398A1 (en) 2002-12-19
DE50113726D1 (de) 2008-04-24
WO2001059359A1 (fr) 2001-08-16
AU2001252121A1 (en) 2001-08-20
ATE389143T1 (de) 2008-03-15
EP1255948B1 (fr) 2008-03-12

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