EP1376008B1 - Beleuchtungseinrichtung - Google Patents

Beleuchtungseinrichtung Download PDF

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Publication number
EP1376008B1
EP1376008B1 EP03019736A EP03019736A EP1376008B1 EP 1376008 B1 EP1376008 B1 EP 1376008B1 EP 03019736 A EP03019736 A EP 03019736A EP 03019736 A EP03019736 A EP 03019736A EP 1376008 B1 EP1376008 B1 EP 1376008B1
Authority
EP
European Patent Office
Prior art keywords
source
reflecting
lighting device
light
reflector
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.)
Expired - Lifetime
Application number
EP03019736A
Other languages
English (en)
French (fr)
Other versions
EP1376008A3 (de
EP1376008A2 (de
Inventor
Claudia Bigliati
Piero Perlo
Sabino Sinesi
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.)
Centro Ricerche Fiat SCpA
Original Assignee
Centro Ricerche Fiat SCpA
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
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Application filed by Centro Ricerche Fiat SCpA filed Critical Centro Ricerche Fiat SCpA
Publication of EP1376008A2 publication Critical patent/EP1376008A2/de
Publication of EP1376008A3 publication Critical patent/EP1376008A3/de
Application granted granted Critical
Publication of EP1376008B1 publication Critical patent/EP1376008B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • 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
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2106/00—Interior vehicle lighting devices
    • 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

Definitions

  • This invention relates to lighting devices for use in motor vehicles, for example for illuminating the passenger compartment, or in homes or offices and public working premises.
  • This invention particularly relates to a lighting device of the type indicated in the pre-characterizing portion of claim 1.
  • a device of this type is known from DE 3 702 236.
  • Other lighting devices are known from GB 1 021 159 and EP 0 766 037.
  • the purpose of this invention is to realise a lighting device presenting high efficiency and a simple, cost-effective, small sized structure.
  • this invention relates to a lighting device having all the features indicated in claim 1.
  • the device according to this invention can be equipped with a lens arranged in front of the primary reflector and the secondary reflector with an internal surface which may be partially or totally equipped with micro prisms.
  • numeral 1 generally indicates a lighting device comprising a pair of light sources 2 in the shape of fluorescent tubes, with an extended longitudinal direction.
  • a reflecting structure indicated generally with reference numeral 3, is associated to the two light sources.
  • the reflecting structure presents a primary reflector 4 and a secondary reflector 5, associated to each light source 2
  • Each primary reflector 4 presents, on a plane with is perpendicular to the longitudinal direction of the light sources 2 (see figure 2) a profile consisting of two volute sections 6, 7, presenting concave surfaces facing the source 2 and joined together to form a cusp 8, located in immediately adjacent to the source 2.
  • the axis 4a of the double cusp is slanted towards the secondary reflector 5.
  • Each secondary reflector 5 presents a plurality of active reflecting sectors 9 corresponding, for example, to portions of a parabola or presenting a complex geometry of any type. Slots 13 are made between the active portions 9 of the secondary reflector and each active portion 9 is equipped with an additional tab 14 for reflecting the light rays hitting its rear surface (with reference to the main output direction of the light beam) in the opposite direction to said main direction.
  • the secondary reflectors 5 reflect the light rays directly from the light source 2 either associated to it or reflected by the primary reflector 4 outwards (i.e. rightwards with reference to figure 2) .
  • the light device presents high efficiency (in the order of 80%) of extraction of the light in the output direction of the light flow with respect to the total output energy.
  • the dimension of the device in the direction of output of the light beam is extremely reduced, which makes the device suitable, for example, also to illuminate rooms in homes or working premises fitted to the ceiling or the wall with the two secondary reflectors 5 both adjacent to the ceiling, because, in this position, the device will only slightly project from the surface on which it is fastened.
  • Figure 3 illustrates a variation, which does not form part of the present invention, with a single source 2, presenting a profile which essentially corresponds to one half of the profile in figure 2.
  • Figure 4 illustrates a variation, which does not form part of the present invention, which differs from the solution in figure 2 only for the fact that it is provided with a lens 11 which closes the front of the device and which has an internal surface partially or totally provided with micro prisms 12.
  • the solution in figure 5 can be used, for example, for illuminating the inside of vertical light panels visible on both sides, such as the case, for example, of light panels which indicate fire exits in public venues or working premises.
  • the central part of the device is more extended outwards, over the edge of the wall or ceiling. This solution is particularly suitable for ceiling applications in which the depth of the device must be reduced and good beam direction control is required at the same time.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Substances (AREA)
  • Control Of Eletrric Generators (AREA)

Claims (7)

  1. Beleuchtungseinrichtung mit einer Lichtquelle (2), die sich in Längsrichtung erstreckt, und reflektierenden Vorrichtungen (4, 5), um die von der Quelle (2) ausgesandten Lichtstrahlen in der Weise zu reflektieren, dass ein sich ausdehnendes, breites Bündel durch die Einrichtung ausgesandt wird, worin die genannten reflektierenden Vorrichtungen aufweisen:
    einen primären Reflektor (4), der nahe an einer Seite der Lichtquelle (2) angeordnet ist, um die von der Quelle (2) ausgesandten Lichtstrahlen zu reflektieren, und
    einen sekundären Reflektor (5), um sowohl die unmittelbar von der Quelle (2) kommenden Lichtstrahlen aufzufangen als auch die von dem Hauptreflektor (4) reflektierten Lichtstrahlen und um die genannten Lichtstrahlen weiter zu leiten, um ein Lichtbündel vorbestimmter Form nach außen zu bilden,
    welch genannter primärer Reflektor einen Abschnitt in einer Ebene, die zur Längsachse der Quelle (2) senkrecht ist, aufweist, mit zwei spiraligen Abschnitten (6, 7), deren Konkavitäten der Quelle(2) zugewandt sind, die vereinigt sind, um einen Scheitel (8) unmittelbar an die Quelle (2) angrenzend zu bilden, und
    genannter sekundärer Reflektor (5) einen Abschnitt in einer Ebene, die senkrecht zur Längsachse der Quelle (2) ist, aufweist, der eine Gruppe von reflektierenden Sektoren (9) umfaßt, die in Stufen angeordnet sind, dadurch gekennzeichnet, dass die reflektierenden Sektoren (9) des sekundären Reflektors (5) durch Schlitze (13) voneinander getrennt und jeder mit einem reflektierenden Streifen (14) ausgerüstet sind, um die Lichtstrahlen von der Lichtquelle (2) und vom primären Reflektor (4) in eine gegenüber der Haupt-Abstrahlrichtung des Lichtbündels der Einrichtung entgegengesetzte Richtung durch die Schlitze (13) hindurch zu reflektieren.
  2. Beleuchtungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Lichtquelle (2) eine Leuchtstoffröhre ist, beispielsweise vom Typ T8 oder T5.
  3. Beleuchtungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Lichtquelle (2) eine Glühlampe, Halogen- oder Entladungslampe ist.
  4. Beleuchtungseinrichtung nach einem der vorausgehenden Ansprüche, dadurch gekennzeichnet, dass sie ein Paar ausgedehnter Lichtquellen aufweist, die zueinander parallel und voneinander im Abstand sind, jede mit einem primären Reflektor und einem sekundären Reflektor des oben spezifizierten Typs ausgerüstet sind, wobei die sekundären Reflektoren (5) im wesentlichen reziprok co-planar und entlang des längs verlaufenden Randes (15) miteinander vereinigt sind.
  5. Beleuchtungseinrichtung nach einem der vorausgehenden Ansprüche, dadurch gekennzeichnet, dass sie ein lichtdurchlässiges Element (11) aufweist, das vor den reflektierenden Vorrichtungen (4, 5) angeordnet ist.
  6. Beleuchtungseinrichtung nach Anspruch 5, dadurch gekennzeichnet, dass das lichtdurchlässige Element (11) eine innere Oberfläche aufweist, die teilweise oder vollständig mit Mikroprismen (12) ausgerüstet ist.
  7. Beleuchtungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der doppelspiralige Abschnitt (6, 7) des primären Reflektors (4) eine Achse aufweist, die gegen den sekundären Reflektor (5) hin schräg verläuft.
EP03019736A 2000-05-02 2001-04-30 Beleuchtungseinrichtung Expired - Lifetime EP1376008B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT2000TO000407A IT1320063B1 (it) 2000-05-02 2000-05-02 Dispositivo di illuminazione.
ITTO20000407 2000-05-02
EP01830287A EP1152187B1 (de) 2000-05-02 2001-04-30 Beleuchtungseinrichtung

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP01830287A Division EP1152187B1 (de) 2000-05-02 2001-04-30 Beleuchtungseinrichtung

Publications (3)

Publication Number Publication Date
EP1376008A2 EP1376008A2 (de) 2004-01-02
EP1376008A3 EP1376008A3 (de) 2004-01-28
EP1376008B1 true EP1376008B1 (de) 2004-11-17

Family

ID=11457695

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01830287A Expired - Lifetime EP1152187B1 (de) 2000-05-02 2001-04-30 Beleuchtungseinrichtung
EP03019736A Expired - Lifetime EP1376008B1 (de) 2000-05-02 2001-04-30 Beleuchtungseinrichtung

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP01830287A Expired - Lifetime EP1152187B1 (de) 2000-05-02 2001-04-30 Beleuchtungseinrichtung

Country Status (4)

Country Link
EP (2) EP1152187B1 (de)
DE (2) DE60107139T2 (de)
ES (2) ES2231752T3 (de)
IT (1) IT1320063B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE338247T1 (de) * 2003-10-23 2006-09-15 Jean-Pierre Pizziga Reflektor für eine ringförmige leuchtstofflampe
US7040782B2 (en) * 2004-02-19 2006-05-09 Gelcore, Llc Off-axis parabolic reflector
DE102009042338B4 (de) * 2009-09-21 2019-03-21 Berchtold Holding Gmbh Operationsleuchte
JP6237083B2 (ja) * 2013-10-07 2017-11-29 市光工業株式会社 車両用灯具
ES2556566B1 (es) * 2014-07-10 2016-11-02 Lledó Iluminación Sa Dispositivo modular luminiscente

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1021159A (en) * 1963-11-18 1966-03-02 Lucas Industries Ltd Lamps
DE3702236A1 (de) * 1986-01-27 1987-12-10 Steinecke Wolfhart Strahler fuer die indirekte beleuchtung eines raumes
IT1281366B1 (it) * 1995-09-27 1998-02-18 Carello Spa Dispositivo di illuminazione realizzabile con spessore ridotto, in particolare proiettore o fanale per veicoli

Also Published As

Publication number Publication date
ES2231423T3 (es) 2005-05-16
EP1152187A3 (de) 2002-11-13
ITTO20000407A1 (it) 2001-11-02
EP1152187A2 (de) 2001-11-07
DE60107139D1 (de) 2004-12-23
IT1320063B1 (it) 2003-11-12
ES2231752T3 (es) 2005-05-16
EP1376008A3 (de) 2004-01-28
DE60107139T2 (de) 2006-02-09
DE60107297T2 (de) 2006-02-09
DE60107297T8 (de) 2006-04-27
EP1152187B1 (de) 2004-11-17
EP1376008A2 (de) 2004-01-02
DE60107297D1 (de) 2004-12-23
ITTO20000407A0 (it) 2000-05-02

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