EP1467143A1 - Kfz-Scheinwerfer mit Mitteln zur horizontalen Aufweitung des Lichtsbündels - Google Patents

Kfz-Scheinwerfer mit Mitteln zur horizontalen Aufweitung des Lichtsbündels Download PDF

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Publication number
EP1467143A1
EP1467143A1 EP04290889A EP04290889A EP1467143A1 EP 1467143 A1 EP1467143 A1 EP 1467143A1 EP 04290889 A EP04290889 A EP 04290889A EP 04290889 A EP04290889 A EP 04290889A EP 1467143 A1 EP1467143 A1 EP 1467143A1
Authority
EP
European Patent Office
Prior art keywords
projector
transversely
generally
lens
light beam
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
EP04290889A
Other languages
English (en)
French (fr)
Other versions
EP1467143B1 (de
Inventor
Norbert Brun
Antoine De Lamberterie
Médéric Heurtier
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.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1467143A1 publication Critical patent/EP1467143A1/de
Application granted granted Critical
Publication of EP1467143B1 publication Critical patent/EP1467143B1/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
    • F21S41/30—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
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass

Definitions

  • the present invention relates to a lighting projector of motor vehicle.
  • the present invention relates more particularly to a motor vehicle lighting headlamp which is intended for create a regulatory lighting beam, comprising a light source which is placed globally at the intersection between a longitudinal optical axis and a transverse optical axis, and which produces a light beam of which at least a part, called lateral, is emitted globally transversely to one side, and a protective glass which is arranged at the front of the projector, the headlamp comprising a converging dioptric element of which the optical axis is substantially aligned transversely with the light source, so as to receive the lateral part of the light beam on its entry face and so as to channel the lateral part in a generally transverse direction oriented to the side.
  • the invention aims to propose a lighting projector which can be arranged in such a housing and which can achieve a regulatory lighting beam.
  • the floodlight must also have a range as uniform as possible, i.e. the luminance of the headlamp must be substantially uniform over its entire frontal surface.
  • the front surface of the light projector must including being able to stand in a height of 50 millimeters and within a width of 300 millimeters.
  • the invention proposes a lighting projector of the type described above, characterized in that it comprises a associated reflecting element comprising an optical surface divergent which is arranged globally opposite the face of output of the converging dioptric element, which is provided for reflect the channeled lateral part of the light beam generally forward, so as to spread transversely the light beam on the rear face of the protective glass, in what the light source is a linear filament which is arranged generally along the longitudinal optical axis, so that the regulatory lighting beam is formed essentially by filament images oriented substantially transversely, and in that the reflecting element is generally convex towards the front and it has the overall shape of a cylinder portion, the cylinder having a substantially vertical axis.
  • FIG 1 there is shown schematically a motor vehicle lighting projector 10 which is produced in accordance with the teachings of the invention.
  • the projector 10 is designed to produce a beam regulatory lighting facing forward, overall along a longitudinal optical axis A-A which is substantially parallel to the longitudinal axis of the vehicle.
  • the forward orientation generally corresponds to a orientation from left to right, along the longitudinal axis A-A, considering Figure 1.
  • the regulatory lighting beam is for example a flat-cut beam, such as a fog beam, or a main beam.
  • the projector 10 here comprises a housing 12 which is delimited by an upper horizontal wall 14, by a horizontal wall lower 16, by a vertical rear wall 18 and by a window protective front 20.
  • FIG. 1 the upper horizontal wall 14 is shown exploded with respect to the rest of the housing 12.
  • the projector 10 includes a light source 22 which is arranged inside the housing 12.
  • the light source 22 is here formed by a lamp 24 to filament 26 which extends substantially longitudinally to the interior of the housing 12, through a mounting hole 28 made in the rear wall 18 of the housing 12.
  • the filament 26 is arranged globally on the axis longitudinal A-A, at the intersection between the longitudinal axis A-A and a transverse direction B-B.
  • the headlamp 10 comprises two converging dioptric elements, respectively left 30 and right 32, which are arranged on the side and on the other side of the filament 26, and which are aligned transversely with the filament 26.
  • the converging dioptric elements 30, 32 are here lenses, for example aspherical, whose optical axes are substantially coincident with the transverse direction B-B.
  • each lens 30, 32 is arranged opposite the filament 26.
  • the exit surface 36 of the left lens 30 is oriented to the left, and the exit surface 36 of the lens right 32 is arranged to the right.
  • the projector 10 also includes a reflective element left 38 and a right reflective element 40 which are associated each respectively to one of the two lenses 30, 32.
  • the reflective elements 38, 40 are here mirrors vertical in the form of a substantially cylindrical portion with an axis vertical.
  • Each mirror 38, 40 has a reflecting surface divergent 42 which is generally forward convex and which is arranged transversely opposite the outlet face 36 of the associated lens 30, 32.
  • the mirrors 38, 40 here constitute two end portions side of the rear wall 18 of the housing 12.
  • the mirrors 38, 40 can therefore be formed by the deposition a reflective material, such as aluminum, on the face internal of the associated portions of the housing 12.
  • Each mirror 38, 40 delimits here, in a horizontal plane, a curved profile, the ends of which are offset transversely, so that each mirror 38, 40 has a vertical rear edge 44 which is close to the lens 30, 32 associated, and a vertical front edge 46 which is distant from the associated lens 30, 32.
  • the projector 10 includes a reflector 48 of longitudinal optical axis A-A, which is substantially aligned longitudinally with the filament 26, and which is arranged at the rear filament 26.
  • the reflector 48 is here of the complex surface type. he has a generally reflecting front surface 50 of shape parabolic concave.
  • the reflector 48 is here formed in a central portion of the rear wall 18 of the housing 12.
  • the light source 22 is represented in the form of a rectangle which symbolizes the filament 26 of the lamp 24 of the figure 1.
  • the filament 26 produces a light beam consisting of light rays emitted globally in all directions.
  • a right side part of the light beam is received by the entry face 34 of the right lens 32, which channels this part of the beam in a generally transverse direction oriented to the right.
  • the filament 26 is arranged at the focal point of the right lens 32, so that the lens right 32 then functions as a collimator which transmits the light rays received on its entry face 34, according to a direction parallel to transverse direction B-B, to the right.
  • the channeled beam is reflected on the wall reflective 42 of the right mirror 40, which returns the rays bright forward, spreading the beam transversely luminous on the rear face 52 of the protective glass 20.
  • the left side portion of the light beam which is received on the entry face 34 of the left lens 30, is reflected by the left mirror 38 towards the front on the rear face 52 of the protective glass 20.
  • the reflection surface 42 of each mirror 38, 40 has several circumferential portions, or striations vertical 54, of different profiles, so as to spread at maximum light beam transversely by distributing substantially homogeneously the light rays on the rear face 52 of the protective glass 20.
  • the rear reflector 48 makes it possible to reflect forward the light rays emitted towards the rear by the filament 26. It contributes to distribute the light rays evenly on the face rear 52 of the protective glass 20.
  • the reflecting surface 50 of the rear reflector 48 can be optimized so as to form a lighting beam comprising a cut.
  • the light rays received on the rear face 52 of the protective glass 20 refract through the glass protection 20, towards the front and they produce a beam at the front lighting regulation F.
  • the images of the filament 26 which are emitted towards the front, by the lateral optical systems, i.e. by the associated lens / mirror systems are oriented substantially horizontally on a screen placed in front of the projector 10.
  • a regulatory bundle to flat cutout such as a fog beam, aligning the images of filament 26 along and below a line transverse forming the flat cut.
  • Image alignment can be done in a way adequate, for example by optimizing the vertical profile of the mirrors 38, 40 and vertical stripes 54.
  • the shape of the light beam produced by the projector 10, in particular the transverse spread of this beam, can be optimized by appropriately choosing the value of the focal length of each lens 30, 32 and choosing the position of the filament 26 on the transverse axis B-B relative to the focus of each lens 30, 32.
  • Figure 3 schematically illustrates the positioning of the filament 26 relative to the right lens 32 for making a regulatory fog light beam.
  • the angle ⁇ 1 represents the numerical aperture of the lens 32 relative to filament 26, which determines the amount of flux light received by the lens 32 on its entry surface 34.
  • the distance T1 represents the transverse distance, or draft, between the filament 26 and the entry surface 34 of the lens 32.
  • the increase in the print makes it possible to obtain images of the filament 26 smaller, at the exit of the lens 32, which facilitates the concentration of the light flux along the optical axis A-A, for the realization of the main beam.
  • the increase in the T2 draw results in a decrease in digital openness, therefore a decrease in the luminous flux received by the lens 32.
  • the lens 32 is truncated in its upper part and in its part lower, which minimizes its vertical dimensions, despite the increase in the diameter of the lens 32, to achieve a projector 10 of low height.
  • the value of the numerical aperture ⁇ 3, in the transverse plane vertical is less than the numerical aperture value ⁇ 1, but the numerical aperture value ⁇ 2 does not change in the plane horizontal transverse.
  • FIG 6 there is shown a second mode of realization of the projector 10 according to the invention, in which vertical stripes 56 are arranged, not on the mirrors 38, 40, but on the rear face 52 of the protective glass 20, so as to spread the light beam transversely which crosses ice 20.
  • the vertical ridges 56 can be arranged only in a central area of the rear face 52 of the protective glass 20 which is located generally opposite the reflector 48.
  • FIG. 7 there is shown a third mode of realization of the projector 10 according to the invention, in which the mirrors 38, 40 are plane mirrors which have streaks vertical 54 on their internal reflection face 42.
  • This mode of implementation differs from the embodiment of FIGS. 1 and 2 by replacing the cylindrical mirrors 38, 40 with plane mirrors.
  • Each plane mirror 38, 40 is substantially vertical and it is inclined with respect to the longitudinal direction A-A and by in relation to the transverse direction B-B.
  • the aspherical lenses 30, 32 can be replaced by other types of lenses, for example by lenses of the type semi-cylindrical with the axis of each half-cylinder parallel to the longitudinal axis A-A.
  • the internal faces of the upper walls 14 and lower 16 may have facets of reflection which collect the light rays emitted by the filament 26, up and down respectively, and which reflect these rays of light towards the rear face 52 of the ice of protection 20.

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)
EP04290889A 2003-04-08 2004-04-02 Kfz-Scheinwerfer mit Mitteln zur horizontalen Aufweitung des Lichtsbündels Expired - Lifetime EP1467143B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0304426 2003-04-08
FR0304426A FR2853718B1 (fr) 2003-04-08 2003-04-08 Projecteur d'eclairage pour vehicule automobile comportant des moyens pour etaler transversalement le faisceau lumineux

Publications (2)

Publication Number Publication Date
EP1467143A1 true EP1467143A1 (de) 2004-10-13
EP1467143B1 EP1467143B1 (de) 2007-07-04

Family

ID=32865407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04290889A Expired - Lifetime EP1467143B1 (de) 2003-04-08 2004-04-02 Kfz-Scheinwerfer mit Mitteln zur horizontalen Aufweitung des Lichtsbündels

Country Status (5)

Country Link
EP (1) EP1467143B1 (de)
AT (1) ATE366390T1 (de)
DE (1) DE602004007318T2 (de)
ES (1) ES2289451T3 (de)
FR (1) FR2853718B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2887997A1 (fr) * 2005-06-30 2007-01-05 Valeo Vision Sa Embout de guide optique a etalement des rayons lumineux
CN114502877A (zh) * 2019-10-10 2022-05-13 昕诺飞控股有限公司 照明设备
WO2022143331A1 (zh) * 2020-12-31 2022-07-07 欧普照明股份有限公司 光学模组及灯具

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012006505A1 (de) * 2012-03-29 2013-10-02 GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) Streulichtscheibe für einen Scheinwerfer
DE102015006258B4 (de) 2015-05-15 2017-01-26 Friedrich Grimm Scheinwerfer mit einem umgelenkten strahlengang

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR35133E (fr) * 1928-03-28 1929-12-03 Perfectionnements apportés aux phares d'automobiles non éblouissants
FR674139A (fr) * 1928-04-27 1930-01-23 Projecteur pour véhicules automobiles
FR36397E (fr) * 1929-01-11 1930-05-10 Perfectionnements apportés aux phares d'automobiles non éblouissants
EP0312442A1 (de) * 1987-10-13 1989-04-19 Valeo Vision Fernlicht-Kraftfahrzeug-Scheinwerfer mit geringer Höhe und mit grosser Ausnutzung des Lichts
EP0723109A1 (de) * 1995-01-19 1996-07-24 Valeo Vision Kraftfahrzeugscheinwerfer mit zwischen Lichtquelle und Reflektor eingesetzten dioptrischen Elementen
FR2759149A1 (fr) * 1997-02-06 1998-08-07 Bosch Gmbh Robert Projecteur pour vehicule
EP1179705A1 (de) * 2000-08-07 2002-02-13 CATEYE Co., Ltd. Scheinwerfer
US6361191B1 (en) * 1998-09-29 2002-03-26 Jerome H. Simon Off-axis and segment collimation and projection

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR35133E (fr) * 1928-03-28 1929-12-03 Perfectionnements apportés aux phares d'automobiles non éblouissants
FR674139A (fr) * 1928-04-27 1930-01-23 Projecteur pour véhicules automobiles
FR36397E (fr) * 1929-01-11 1930-05-10 Perfectionnements apportés aux phares d'automobiles non éblouissants
EP0312442A1 (de) * 1987-10-13 1989-04-19 Valeo Vision Fernlicht-Kraftfahrzeug-Scheinwerfer mit geringer Höhe und mit grosser Ausnutzung des Lichts
EP0723109A1 (de) * 1995-01-19 1996-07-24 Valeo Vision Kraftfahrzeugscheinwerfer mit zwischen Lichtquelle und Reflektor eingesetzten dioptrischen Elementen
FR2759149A1 (fr) * 1997-02-06 1998-08-07 Bosch Gmbh Robert Projecteur pour vehicule
US6361191B1 (en) * 1998-09-29 2002-03-26 Jerome H. Simon Off-axis and segment collimation and projection
EP1179705A1 (de) * 2000-08-07 2002-02-13 CATEYE Co., Ltd. Scheinwerfer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2887997A1 (fr) * 2005-06-30 2007-01-05 Valeo Vision Sa Embout de guide optique a etalement des rayons lumineux
CN114502877A (zh) * 2019-10-10 2022-05-13 昕诺飞控股有限公司 照明设备
WO2022143331A1 (zh) * 2020-12-31 2022-07-07 欧普照明股份有限公司 光学模组及灯具

Also Published As

Publication number Publication date
ATE366390T1 (de) 2007-07-15
ES2289451T3 (es) 2008-02-01
DE602004007318D1 (de) 2007-08-16
FR2853718A1 (fr) 2004-10-15
EP1467143B1 (de) 2007-07-04
DE602004007318T2 (de) 2008-03-06
FR2853718B1 (fr) 2005-09-23

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