EP0886101B1 - Lampe pour véhicules automobiles - Google Patents

Lampe pour véhicules automobiles Download PDF

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Publication number
EP0886101B1
EP0886101B1 EP98830368A EP98830368A EP0886101B1 EP 0886101 B1 EP0886101 B1 EP 0886101B1 EP 98830368 A EP98830368 A EP 98830368A EP 98830368 A EP98830368 A EP 98830368A EP 0886101 B1 EP0886101 B1 EP 0886101B1
Authority
EP
European Patent Office
Prior art keywords
lamp
lamp according
reflective element
light source
transparent plate
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
EP98830368A
Other languages
German (de)
English (en)
Other versions
EP0886101A2 (fr
EP0886101A3 (fr
Inventor
Piero Perlo
Claudia Bigliati
Vito Lambertini
Piermario Repetto
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
Application filed by Centro Ricerche Fiat SCpA filed Critical Centro Ricerche Fiat SCpA
Publication of EP0886101A2 publication Critical patent/EP0886101A2/fr
Publication of EP0886101A3 publication Critical patent/EP0886101A3/fr
Application granted granted Critical
Publication of EP0886101B1 publication Critical patent/EP0886101B1/fr
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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/255—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors

Definitions

  • the present invention relates to the field of motor-vehicle lamps, and in particular to the subject-matter of the preambles of independent claims 1 and 13.
  • a lamp according to the preamble of claim 1 is known from EP-A-0 766 037.
  • the object of the present invention is that of solving all the above mentioned problems efficiently by providing a lamp which has a minimum bulk along the direction orthogonal to the transparent element of the lamp, which is simple and inexpensive to manufacture and ensures that a uniform light beam is obtained at the output, having the required characteristics, even in case the lamp is positioned at an area of the motor-vehicle which is not ideal in order to achieving a good rearward lighting, such as at a side edge of the rear part of the motor-vehicle.
  • the invention provides a lamp for motor-vehicles comprising the features of claim 1.
  • the lateral areas may be also defined by a plurality of paraboloid segments located side by side along said first direction or alternatively may have a smooth surface.
  • the surface of the main reflective wall is optimized in order to lighten the transparent plate uniformly and the paraboloid segments are calculated in order to provide a light beam coming out of the lamp body in the required direction.
  • the light source with the auxiliary reflective element associated therewith is positioned on one side of the lamp body, either centrally with respect to this side, or at one end thereof, at one edge of the lamp body.
  • This auxiliary reflective element has a cylindroid-like surface and forms, along with the light source associated therewith, a single unit provided with means for quick coupling to the lamp body.
  • the light source is preferably constituted by a lamp whose base is arranged transversely with respect to the optical axis of the auxiliary reflective elements and is received within a notch formed in the front edge of the auxiliary reflective element. Therefore, in order to replace the lamp, it is necessary to disengage the auxiliary element from the lamp body and then remove the electric lamp from the front notch of the auxiliary reflective element, proceeding thereafter in the opposite way in order to install the new electric lamp. This solution further reduces the bulk of the lamp according to the invention.
  • the main reflective wall is able to give raise to a uniform light beam, having the required characteristics, without the need of providing further prisms on the transparent plate, even if of course this possibility remains available to the designer.
  • the lamp according to the invention solves all the above mentioned problems brilliantly, while keeping the bulk along the direction orthogonal to the transparent plate extremely reduced, which renders possible to position the lamp even at areas of the motor-vehicle where the available space is very reduced.
  • the invention is also directed to a light unit as set forth in claim 13.
  • reference numeral 1 generally designates a rear light unit for a motor-vehicle, which is to be arranged along the righthand lateral edge of the rear portion of a motor-vehicle.
  • the light unit 1 comprises a plurality of lamps 2, 3, 4, 5, 6 which are aligned vertically above each other, at least one of which is made according to the present invention.
  • lamp 2 In the following, reference will be made, purely by way of example, to lamp 2.
  • the lamp comprises a box-like body opened at the front.
  • the front aperture of the box-like body which is preferably made of plastic material, is closed by a transparent plate 7 (see figure 2).
  • the wall of the hollow body of the lamp which faces the transparent plate 7 constitutes a main reflective wall 8 having a central area 8a and two lateral areas 8b.
  • the dimension of the lamp along the direction orthogonal to the transparent plate 7 is greatly reduced with respect to the other dimensions of the lamp.
  • the reflective wall 8 is relatively close to the transparent plate 7. This arrangement is possible since with the lamp 2 there is associated a light source 9 which is constituted by an electric lamp which is arranged at one side of the lamp body and surrounded by an auxiliary reflective element 10.
  • Figures 3, 4 show two possible alternatives in which the lamp 9 is arranged at one side of the lamp body, at the center of this side (figure 3) or at one end thereof (figure 4) at one corner of the lamp body (as shown also in figure 1).
  • figure 4 is preferred to that of figure 3 since it provides a greater value of the ratio between the surface of the central area 8a and the total surface of the reflective wall 8.
  • the central area 8a and the lateral areas 8b of the reflective wall 8 can be made as to form a continuous surface, as shown in figure 5.
  • the electric lamp 9 has a base 9a which is arranged transversely with respect to the optical axis of the auxiliary reflective element 10 and is received within a notch 10a formed in the front edge of the reflective element 10.
  • the reflective element 10 and electric lamp 9 form a single unit provided with means of any known type (not shown) for quick coupling to the body of lamp 2.
  • the arrangement shown in figure 7 minimizes the bulk of the device in the case of two or more adjacent lamps, where the auxiliary reflective element 10 of each lamp is fitted under the reflective wall 8 of the adjacent lamp.
  • the transparent plate 7 can be arranged side by side with no remaining non-illuminated gaps between adjacent lamps.
  • the central area 8a has a number of paraboloid segments arranged side by side along the direction of the optical axis of the auxiliary reflective element 10.
  • the lateral areas 8b can be defined similarly to the central area 8a or alternatively may have a smooth surface in order to simplify the moulding operation of the lamp body.
  • the transparent plate can be provided with prisms and preferably has a peripheral edge which is shaped so as to obtain particular aesthetical effects, or iridescence effects or in order to control the light beam.
  • the transparent plate 7 has a matrix of microlenses adapted to further modify the characteristics of the light beam coming out of the device.
  • Figure 6 shows a diagram which shows two graphs I, II relating to the light intensity characteristics in the horizontal and vertical planes respectively.
  • the lamp is arranged on the motor-vehicle at a position such that the geometrical axis of the lamp is inclined upwardly and outwardly with respect to the longitudinal direction of the motor-vehicle, the geometrical characteristics of the reflective wall 8 are such that the light beam coming out of the device has the required direction.
  • the wall of the lamp body is made of plastic material and is coated with aluminium at the area where it is necessary to provide reflective characteristics.
  • the transparent plate is also made of plastic material, according to the conventional requirements.
  • the auxiliary reflective element which is associated with the electric lamp can be made of aluminium pressed sheet.
  • the whole unit of the auxiliary reflective element is made by electroforming, a method which provides a greater precision in the manufacture, a greater flexibility in the design of the shape and a greater dissipation ability with respect to the conventional materials.
  • paraboloid segments could be replaced by ellipsoid segments or more generally by any other type of surface obtained by rotating a conic section.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (13)

  1. Lampe de véhicule à moteur, comprenant :
    un corps creux (2) ayant une ouverture avant fermée par une plaque transparente (7) et une paroi réfléchissante principale (8) tournée vers la plaque transparente (7), le corps creux (2) ayant une dimension relativement réduite en direction perpendiculaire à la plaque transparente (7), et
    une source de lumière (9) disposée d'un premier côté du corps creux (2) et à laquelle est associé un élément réfléchissant auxiliaire (10) destiné à diriger des rayons lumineux émis par la source (9) dans une première direction pratiquement parallèle à la plaque transparente (7) vers la paroi réfléchissante principale (8), la paroi réfléchissante principale (8) étant destinée à réfléchir ces rayons dans la direction de la plaque transparente (7), afin qu'un faisceau uniforme de lumière ayant les caractéristiques nécessaires soit obtenu à la sortie de la plaque transparente (7),
       caractérisée en ce que la paroi réfléchissante principale (8) possède une région centrale (8a) délimitée par un arrangement en marches d'escalier formé des segments disposés côte à côte dans la première direction et ayant chacun un foyer à la source lumineuse,
       en ce que les segments de la région centrale (8a) ont des surfaces obtenues par rotation d'une section conique, et en ce que la paroi réfléchissante principale (8) a en outre deux régions latérales (8b) disposées sur des côtés opposés de la région centrale (8a).
  2. Lampe selon la revendication 1, caractérisée en ce que la source de lumière (9), avec l'élément réfléchissant auxiliaire (10) qui lui est associé, est positionnée au centre d'un premier côté du corps de lampe (2).
  3. Lampe selon la revendication 1, caractérisée en ce que la source de lumière (9), avec l'élément réfléchissant auxiliaire (10) qui lui est associé, est positionnée à une extrémité d'un côté du corps de lampe (2), à un coin du corps de lampe (2).
  4. Lampe selon la revendication 1, caractérisée en ce que l'élément réfléchissant auxiliaire (10) a une surface analogue à un cylindre.
  5. Lampe selon la revendication 1, caractérisée en ce que la source de lumière (9), avec l'élément réfléchissant (10) qui lui est associé, forme une unité unique ayant un dispositif de raccordement rapide au corps de lampe (2).
  6. Lampe selon la revendication 5, caractérisée en ce que la source de lumière (9) est constituée par une lampe électrique dont la base (9a) est disposée transversalement à l'axe optique de l'élément réfléchissant auxiliaire (10) et est logée dans une encoche (10a) formée au bord avant de l'élément réfléchissant auxiliaire.
  7. Lampe selon la revendication 1, caractérisée en ce que les segments de la région centrale (8a) sont des segments de paraboloïde.
  8. Lampe selon la revendication 7, caractérisée en ce que l'élément transparent (7) a un bord périphérique dont la forme est telle qu'il donne des effets d'iridescence ou des effets affectant le faisceau de lumière,
  9. Lampe selon la revendication 1, caractérisée en ce que l'élément transparent (7) possède une matrice de micro-lentilles.
  10. Lampe selon la revendication 1, caractérisée en ce qu'un filtre coloré est associé à la source de lumière.
  11. Lampe selon la revendication 1, caractérisée en ce que les régions latérales (8b) ont une surface lisse.
  12. Lampe selon la revendication 1, caractérisée en ce que les régions latérales (8b) sont délimitées chacune par un arrangement en marches d'escalier de segments de paraboloïde.
  13. Unité à lampes pour véhicule à moteur, comprenant deux ou plusieurs lampes selon la revendication 1, caractérisée en ce que l'élément réfléchissant (10) de chaque lampe est monté sous la paroi réfléchissante (8) de la lampe adjacente.
EP98830368A 1997-06-19 1998-06-17 Lampe pour véhicules automobiles Expired - Lifetime EP0886101B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97TO000530A IT1292782B1 (it) 1997-06-19 1997-06-19 Fanale per autoveicoli.
ITTO970530 1997-06-19

Publications (3)

Publication Number Publication Date
EP0886101A2 EP0886101A2 (fr) 1998-12-23
EP0886101A3 EP0886101A3 (fr) 2000-11-02
EP0886101B1 true EP0886101B1 (fr) 2002-08-21

Family

ID=11415791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98830368A Expired - Lifetime EP0886101B1 (fr) 1997-06-19 1998-06-17 Lampe pour véhicules automobiles

Country Status (3)

Country Link
EP (1) EP0886101B1 (fr)
DE (1) DE69807292T2 (fr)
IT (1) IT1292782B1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69900437T2 (de) 1999-08-11 2002-05-16 Automotive Lighting Italia Spa Kraftfahrzeugleuchte
JP4010084B2 (ja) 1999-10-21 2007-11-21 市光工業株式会社 小型光源モジュール及び光源ユニット
DE10019559A1 (de) * 2000-04-20 2001-10-25 Hella Kg Hueck & Co Fahrzeugleuchte
ITTO20010462A1 (it) * 2001-05-18 2002-11-18 Fiat Ricerche Dispositivo di illuminazione, particolarmente fanale per autoveicoli.
EP2021687A2 (fr) 2006-04-13 2009-02-11 Koninklijke Philips Electronics N.V. Systeme d'eclairage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1047461A (fr) * 1900-01-01
GB1021159A (en) * 1963-11-18 1966-03-02 Lucas Industries Ltd Lamps
US5190370A (en) * 1991-08-21 1993-03-02 Minnesota Mining And Manufacturing Company High aspect ratio lighting element
IT1281366B1 (it) * 1995-09-27 1998-02-18 Carello Spa Dispositivo di illuminazione realizzabile con spessore ridotto, in particolare proiettore o fanale per veicoli
DE19624244B4 (de) * 1996-06-18 2010-01-14 Automotive Lighting Reutlingen Gmbh Leuchte für Fahrzeuge

Also Published As

Publication number Publication date
EP0886101A2 (fr) 1998-12-23
IT1292782B1 (it) 1999-02-11
ITTO970530A1 (it) 1998-12-19
DE69807292D1 (de) 2002-09-26
ITTO970530A0 (fr) 1997-06-19
DE69807292T2 (de) 2003-05-08
EP0886101A3 (fr) 2000-11-02

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