EP1054210A2 - Scheinwerfer nach dem Projektionstyp für Kraftfahrzeuge - Google Patents

Scheinwerfer nach dem Projektionstyp für Kraftfahrzeuge Download PDF

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Publication number
EP1054210A2
EP1054210A2 EP00304175A EP00304175A EP1054210A2 EP 1054210 A2 EP1054210 A2 EP 1054210A2 EP 00304175 A EP00304175 A EP 00304175A EP 00304175 A EP00304175 A EP 00304175A EP 1054210 A2 EP1054210 A2 EP 1054210A2
Authority
EP
European Patent Office
Prior art keywords
reflector
headlamp according
light
objective
shades
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
EP00304175A
Other languages
English (en)
French (fr)
Other versions
EP1054210A3 (de
EP1054210B1 (de
Inventor
Milan Cejnek
David Vozenilek
Jaroslav Purma
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.)
Hanon Systems Autopal Services sro
Original Assignee
Autopal sro
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 Autopal sro filed Critical Autopal sro
Publication of EP1054210A2 publication Critical patent/EP1054210A2/de
Publication of EP1054210A3 publication Critical patent/EP1054210A3/de
Application granted granted Critical
Publication of EP1054210B1 publication Critical patent/EP1054210B1/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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/335—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with continuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses

Definitions

  • the present invention relates to headlamps of projecting model for motor vehicles comprised of an internal and an external reflectors, a light source, a shade and an objective.
  • the internal reflector is in the form of a free surface with one focus situated in proximity of the light source and the other focus situated in the space between the reflector and the objective.
  • the external reflector takes also the form of a free surface but with one focus situated in proximity of the light source and the other focus situated off the headlamp optical system.
  • the method of integrating the dimmed and the long-distance beams is solved by means of changing shade positions what makes possible to change light beam geometry and intensity as a consequence of different concentration effects of the internal and the external reflectors.
  • the commercially used two-functional projecting systems that comprise of two models of reflectors, an internal one and an external one, an objective, a light source and shading elements and providing two basic headlamp modes, the long-distance and the dipped modes, exhibit generally the following design, structure and function of individual parts.
  • the external and the internal reflectors form one assembly, i.e. a corpus, or at least the external reflector begins there where the internal one ends.
  • the shading elements have only limited possibilities of movement during switching them between the long-distance and the dipped modes. Therefore, in case of both modes they have to be maintained within the optical system.
  • the internal reflector is of an elliptical form and the external one is of a parabolic form both having one common focus in proximity of the light source.
  • a disadvantage remains to be that by means of the reflectors with purely elliptical or parabolic reflecting surfaces it is very difficult or even impossible to obtain a satisfactory light distribution in front of an automobile.
  • a device providing switching between the long-distance and the dipped modes is mounted on the reflecting corpus, what is not preferable from the design point of view so far as the corpus is made of a thermoplastic material as undesired deformations could take place.
  • a projecting headlamp that is comprised of an independent internal and an external reflectors having the forms of free surfaces, an objective, a light source, an internal shade and two external shades.
  • the internal reflector integrates light emitted by a light source and passing through a focus plane of said objective and further through said objective and the external reflector reflects light emitted by a light source into a direction which goes outside the objective.
  • the first focus is situated in proximity of the light source and the other focus is situated in proximity of the objective focus.
  • the first focus of the external reflector is situated in proximity the light source and the other focus is situated off the optical system.
  • a spiralled filament of a halogen lamp or an arc discharge can serve as a light source.
  • the internal shade a part of which horizontal edge is situated in proximity of the horizontal line and the objective focus, is projected on the road surface by means of an objective on light background of the internal reflector and produces so a boundary between light and darkness, and the external shades obstruct rays emitted by the light source in the direction to the external reflector.
  • the switching device which is mounted on the carrying frame, shifts all shades to such positions in which none of said shades obstructs the out shining light beam and on a road surface two light traces are added, i.e. the one produced by the internal and the one produced by the external reflectors.
  • the internal reflector collimates the whole light beam and produces a light trace having no boundary between light and darkness and the external reflector shines into the area of maximum intensity of said light trace.
  • the external and the internal reflectors can be provided with a diffusion pattern.
  • the objective can be of aspheric form to decrease optical aberrations.
  • the Figures 1, 2 and 3 show an embodiment of a two-functional projector system which is comprised of a light source 1 , an internal reflector 2 , an external reflector 3 , an objective 4 an internal shade 51 , external shades 61 and 62 , a frame 7 , an electric part 8 and a moving mechanism 9 .
  • the internal reflector 2 is in the form of a free surface provided with a diffusion pattern to improve beam homogeneity and was made of a reflector 19 by cutting it in the positions of cutting curves 17 and 18 .
  • One focus F1 of this internal reflector 2 is situated in proximity of optical x-axis of the system and the other focus F2 is situated in the space between the internal reflector 2 and the objective 4 .
  • the external reflector 3 is separated from the internal reflector 2 and it takes the form of a free surface with one focus F1 common with that of the internal reflector 2 and the other focus is situated off the optical system.
  • the light source 1 is situated in proximity of the focus F1.
  • the light source 1 can be e.g. a spiralled filament of a bulb or an arc of a discharge lamp.
  • an internal shade 51 is placed in vertical position in the space between the internal reflector 2 and the objective 4 so that a part of the horizontal edge of said shade 51 is situated in proximity of the focus F2 which focus F2 is simultaneously the focus of the objective 4 .
  • This objective 4 is situated in front of the whole optical system and it is of aspheric shape to decrease optical aberrations.
  • the moving mechanism 9 is fixed to a carrying frame 7 situated on the bottom side of the headlamp and it is driven by the electric part 8 .
  • the rays emitted by the light source 1 are collimated by the internal reflector 2 into the space of the focus F2 of the objective 4 and this objective 4 projects the internal shade 51 on the light background of the reflector 2 on the road surface and produces so the light trace 12 , see Fig. 4, which trace 12 is situated below the light and darkness boundary 15 .
  • the external shades 61 and 62 obstruct path of rays emitted by the light source in the direction to the external reflector 3 .
  • arms of the moving mechanism 9 having external shades 61 and 62 fixed to them form an angle ⁇ from 10° to 180°.
  • the mechanism 9 provides switching of shade 51 into the position 52 and switching of shades 61 and 62 into the positions 63 and 64 so that none of the shades for this mode obstructs any of the light beams that produce a sum of the traces 12 and 13 produced by the reflector 2 and the trace 14 produced by the reflector 3 that is not collimated by objective 4 on the road surface.
  • the traces 12 and 13 exhibit a broad side diffusion, the trace 14 is concentrated into the area of the maximum light beam intensity.
  • the arms of the moving mechanism 9 having external shades 61 and 62 fixed on them, perform rotational movement around the axis of rotation 16 into the position where the opening of both arms of the moving mechanism 9 forms an angle ⁇ from 30° to 360° and simultaneously the internal shade 51 rotates around the axis of rotation 11 by an angle ⁇ from 0° to 180° or it can perform any translational or rotational movements or a combination of said basic movements.
  • the external shades 61 and 62 can have each their own axis of rotation or they can perform any translational or rotational movements or a combination of such movements.
  • D is smaller or equal to V, whereby, D is the diameter of the objective 4 and V is the maximum dimension of the external reflector 3 .
  • the headlamp arrangement in accordance with this invention makes possible to improve distribution of the light traces 12 , 13 and 14 thanks to the external 3 and the internal 2 reflectors having the shape of a free surface. Further, it is possible to increase homogeneity of the light beams by providing diffusion patterns on both reflectors and to transfer the weight of the moving mechanism 9 from the reflectors to the carrying frame 7 . Last but not least, it allows a higher movement freedom of the external shades 61, 62 owing to separation of the external 3 and the internal 2 reflectors.
  • the present invention will find use in vehicles operated on surface communications.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP00304175A 1999-05-17 2000-05-17 Scheinwerfer nach dem Projektionstyp für Kraftfahrzeuge Expired - Lifetime EP1054210B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ19991738A CZ9901738A3 (cs) 1999-05-17 1999-05-17 Projekční světlomet pro motorová vozidla
CZ173899 1999-05-17

Publications (3)

Publication Number Publication Date
EP1054210A2 true EP1054210A2 (de) 2000-11-22
EP1054210A3 EP1054210A3 (de) 2002-02-20
EP1054210B1 EP1054210B1 (de) 2006-07-05

Family

ID=5463749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00304175A Expired - Lifetime EP1054210B1 (de) 1999-05-17 2000-05-17 Scheinwerfer nach dem Projektionstyp für Kraftfahrzeuge

Country Status (4)

Country Link
EP (1) EP1054210B1 (de)
CZ (1) CZ9901738A3 (de)
DE (1) DE60029163T2 (de)
ES (1) ES2277585T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1219887A3 (de) * 2000-12-25 2004-02-25 Stanley Electric Co., Ltd. Fahrzeugscheinwerfer mit einer verstellbaren Blende und einer verstellbaren Reflektorfläche zur Erzeugung eines Abblend- und Fernlichtbündels
EP2407710A3 (de) * 2010-07-16 2017-11-29 Koito Manufacturing Co., Ltd. Fahrzeugleuchte

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3528820C2 (de) * 1985-08-10 1994-02-24 Bosch Gmbh Robert Abblendlicht- oder Nebellichtscheinwerfer für Kraftfahrzeuge
IT1247780B (it) * 1990-11-16 1994-12-30 Carello Spa Proiettore ellittico a due luci per veicoli
JPH05347101A (ja) * 1992-06-12 1993-12-27 Stanley Electric Co Ltd プロジェクタ型灯具
DE19756437A1 (de) * 1997-12-18 1999-06-24 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge für Abblendlicht und Fernlicht

Non-Patent Citations (1)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1219887A3 (de) * 2000-12-25 2004-02-25 Stanley Electric Co., Ltd. Fahrzeugscheinwerfer mit einer verstellbaren Blende und einer verstellbaren Reflektorfläche zur Erzeugung eines Abblend- und Fernlichtbündels
EP2407710A3 (de) * 2010-07-16 2017-11-29 Koito Manufacturing Co., Ltd. Fahrzeugleuchte

Also Published As

Publication number Publication date
EP1054210A3 (de) 2002-02-20
DE60029163D1 (de) 2006-08-17
DE60029163T2 (de) 2007-06-28
EP1054210B1 (de) 2006-07-05
CZ9901738A3 (cs) 2001-01-17
ES2277585T3 (es) 2007-07-16

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