EP1077347A2 - Projecteur pour véhicule - Google Patents

Projecteur pour véhicule Download PDF

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Publication number
EP1077347A2
EP1077347A2 EP00890244A EP00890244A EP1077347A2 EP 1077347 A2 EP1077347 A2 EP 1077347A2 EP 00890244 A EP00890244 A EP 00890244A EP 00890244 A EP00890244 A EP 00890244A EP 1077347 A2 EP1077347 A2 EP 1077347A2
Authority
EP
European Patent Office
Prior art keywords
reflector
light
area
vehicle headlight
headlight according
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
EP00890244A
Other languages
German (de)
English (en)
Other versions
EP1077347A3 (fr
EP1077347B1 (fr
Inventor
Michael Aichinger
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.)
ZKW Group GmbH
Original Assignee
Zizala Lichtsysteme 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 Zizala Lichtsysteme GmbH filed Critical Zizala Lichtsysteme GmbH
Publication of EP1077347A2 publication Critical patent/EP1077347A2/fr
Publication of EP1077347A3 publication Critical patent/EP1077347A3/fr
Application granted granted Critical
Publication of EP1077347B1 publication Critical patent/EP1077347B1/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
    • 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

Definitions

  • the invention relates to a vehicle headlight with an open-space reflector for generation of an asymmetrical low beam, the reflector in the vertical direction three lighting areas, an upper area, a middle area and a lower area is divided and the central area has a central area, to which a light source is assigned, the upper and middle area of the reflector separated from each other by an upper transition, the middle and the lower area through lower transitions from each other running on both sides of the light source are separated, the two lower transitions from the central area to the outside running, inclined at different angles against a horizontal are.
  • Open space reflectors have been used more and more in vehicle headlights in recent years for use. This is particularly due to the fact that with the help of open space reflectors in contrast to reflectors with a defined geometric structure almost any light distribution can be generated.
  • a disadvantage that is common when using of free-standing reflectors occurs that is often undesirable side effects occur in the light distribution pattern, whereby it is usually not possible to have these side effects to calculate in advance, such as when using reflectors which are based on based on mathematical control areas.
  • Such undesirable occur Side effects with open space reflectors in connection with a reflector segmentation on. In the transition areas between the different reflector areas For example, reflected light is reflected upwards, making it undesirable Dazzling effects for oncoming traffic can come.
  • a high luminous efficacy and thus good illumination of what is in front of a vehicle Range is achieved when using high pressure gas discharge lamps.
  • a High-pressure gas discharge lamp which is well known to the person skilled in the art and is frequently used is the so-called D2R lamp, which is used to generate a Low beam has two cover strips below the horizontal plane of the headlamp.
  • these lamps have the Disadvantage on that with headlights in which these lamps are used, disturbing effects, such as dazzling oncoming traffic, frequently occur.
  • the light source has two substantially horizontal cover strips are assigned, the cover strips on both sides of the light source in its immediate Proximity, in an area below a horizontal plane running through the light source, are arranged, by means of the cover strips a sharp cut-off from the Light emitted light emitted via the central area of the reflector is generated, furthermore the lower transitions are arranged so that they match those of the Masking strips produced coincide, essentially escaping upwards Light over the top of the reflector into a substantially below the Light-dark boundary area is emitted, and the lower edges of the cover strips leave a light exit area free, and the one emerging from this area Light across the bottom of the reflector into a substantially below the cut-off lying area is emitted.
  • the vehicle headlight has a reflector in free-space technology, which also with a light source cooperates, that a maximum light yield is given.
  • a reflector in the vertical direction in an upper, a middle and an divided lower area.
  • the reflector is equipped with a known light source, the has two cover strips for producing a low beam distribution pattern, such as such as a high-pressure gas discharge lamp of type D2R, which has a high Luminous efficacy delivers.
  • the reflector is designed to emit light from this light source is emitted essentially upwards or downwards, via the upper one or the lower area of the reflector in the exterior of the headlight, i.e. in is generally reflected on a carriageway where there is apron and latitude illumination serves.
  • the areas of the reflector are separated from one another by transitions, whereby the lower transitions are arranged so that they are in from the two cover strips generated shadow areas.
  • This arrangement of the lighting technology worthless Areas of the reflector in the shadow area of the cover strips become a maximum on the one hand Luminous efficacy is achieved, on the other hand, glare effects, which are preferred by Transitions incident light are avoided.
  • the middle area of the reflector reflects light essentially in an area of the cut-off line, being a sharp image of the cut-off line itself achieved using the two cover strips becomes.
  • the central area As a result of the central area, the middle area of the Reflector, so that the central area of the reflector has a left (right) and a right (left) portion, with the lower transition between the left (right) section and the lower area at a smaller angle to the horizontal runs as the lower transition between the right (left) section and the lower part of the reflector.
  • the size of the angle results from the Arrangement of the cover strips.
  • the smaller angle a value of 5 ° - 10 ° and the larger angle a value of 17.5 ° - 25 ° on.
  • the reflector has stepped upper and lower transitions.
  • the step-like transitions are designed to jump backwards, the upper transition being essentially horizontally extending transition surface is formed. Training the upper The transition as an essentially horizontal transition surface has therefore proven to be as cheap, because light that gets there is deflected downwards and therefore none Glare, for example for oncoming traffic.
  • left and right are interchangeable are to be understood as light asymmetry in countries or states with left-hand traffic is a mirror image of those with right-hand traffic, with the headlamp then the has corresponding asymmetry.
  • the surface grooves of the left (right) section have groove planes, which are substantially normal to a horizontal plane through the optical axis and run through the optical axis at different angles to the vertical plane. In this way, homogenization of the light becomes substantially horizontal extending area of the cut-off line, d. H. essentially in the area of a Oncoming traffic side of a lane, reached.
  • the upper and lower regions of the reflector essentially point to them have surface grooves, these in the sense of a homogeneous Intensity and color mixing of the reflected from these areas in the outdoor space Light run. This makes uniform apron and width illumination one Roadway achieved by the vehicle headlights according to the invention.
  • the vehicle headlamp is advantageous as a headlamp with a clear lens is trained. Such is much cheaper than a corrective lens, the can also be omitted with regard to the special reflector design.
  • the light source is formed by the arc of a high pressure xenon lamp, which is substantially horizontal and runs parallel to the cover strips.
  • Fig. 1 shows a front view of an open space reflector 1 of an inventive Vehicle headlights.
  • the reflector 1 is in the vertical direction in three lighting technology relevant areas, an upper area 2, a middle area 3, and a lower Area 4 divided.
  • the central area 3 is due to a central area 5 in a left (right) section 3a and a right (left) section 3b divided.
  • the central region 5 is formed as a substantially circular opening, which for Recording a lamp 10 is provided.
  • the lamp 10 is based on FIGS. 5 and 6 explained in more detail.
  • the reflector 1 shown here is used in a vehicle headlight for a vehicle intended for right-hand traffic. To one for left-hand traffic To achieve adjusted light distribution, the reflector only needs to be mirrored. The The following considerations apply accordingly to reflectors for left-hand traffic, only the words left and right are to be exchanged for each other.
  • the upper region 2 and the central region 3a are through an upper transition 6, the middle area 3 and lower area 4 by means of lower transitions 7a, 7b from one another Cut.
  • the upper transition 6 runs essentially horizontally, whereas the lower transitions 7a, 7b at different angles a1, a2 against one Horizontal U are inclined downwards.
  • FIG. 3 shows a vertical section through the reflector 1 along the line III - III from Fig. 1. From Fig. 3 is the step-like course of the upper transition 6 and a lower transition 7b clearly visible. The transitions are jumping backwards, with "backwards" essentially one Direction against a light direction Y is to be understood. From Fig. 3 it can be seen that the upper transition 6 as a substantially horizontal transition surface 6 is trained. The reason for this form of training is that of the light source 12 emerging light, which reaches the transition 6, completely deflected downward so that no glare can occur.
  • the lamp 10 used in the vehicle headlight according to the invention is This is, for example, a xenon high-pressure gas discharge lamp which is well known to the person skilled in the art type D2R. 5 one can be seen in the side view Bracket 11, by means of which the light source 12 can be fastened in the opening 5 of the reflector 1 is.
  • the lamp 10 has a light source 12, which is the arc of the xenon high-pressure lamp is trained.
  • the light source 12 is of a transparent, substantially surrounded cylindrical outer sheath 8.
  • On the casing 8 are two cover strips 13, 14 attached, the cover strips 13, 14 essentially run parallel to a longitudinal axis X of the lamp 10.
  • the special arrangement of the Cover strips 13, 14 can be seen.
  • the two cover strips 13, 14 are on both sides of the Longitudinal axis X of the lamp 10, below a horizontal plane running through the longitudinal axis X. HE arranged.
  • the second cover strip 14 is so arranged that an upper edge is approximately an angle b3 below the plane HE and the cover strip extends over a circular arc at an angle b2.
  • cover strips 13, 14 are usually a black coating the sheath 8, which prevents light from passing through the area they cover from the light source to the outside.
  • the light generated in the light source 12 can essentially in any direction from the Exit lamp 10. Only through that area of the casing 8 which has cover strips 13, 14 are provided, no light from the lamp 10 can reach the outside. Directly radiated, i.e. H.
  • the light emitted to the front is in on vehicle headlights generally undesirable, as it generally has a strong glare effect. To do this Preventing is in a practical embodiment of the headlamp to the expert known shading arranged in front of the lamp 10, which is not the subject of the invention and therefore not shown in the drawings.
  • An essential feature of the reflector 1 is that the lower transitions 7a, 7b are arranged exactly in the area in which the shadows of the cover strips 13, 14 occur.
  • This arrangement of the lower transitions is chosen for the reason that the Light reflected from transition areas often leads to severe glare. To lead back this is mainly due to the fact that a calculation of a beam path of in the transition areas of reflected light, especially in the case of abrupt transitions, often is very complex and difficult and also these transition areas due to production technology Inaccuracies often also deviate from a calculated form.
  • transitions 7a, 7b are now in the shadow areas of the cover strips 13, 14, see above no light from the transitions 7a, 7b into the exterior of the vehicle headlight are reflected, thus avoiding glare, for example from oncoming traffic becomes.
  • Another advantage of this arrangement of the transitions 7a, 7b is that almost all of the light emerging from the light source 12 of such reflector regions can be supplied, which for illuminating the lying in front of the vehicle Contribute to the area, thereby achieving maximum utilization of the light produced becomes.
  • the lower transitions 7a, 7b arranged so that they are completely in that generated by the cover strips 13, 14 Shadow area lie, with the shadow area in the vertical direction upwards and is slightly extended below the area occupied by the transitions 7a, 7b. This ensures that the vehicle headlight or that of the vehicle headlight
  • the light distribution generated is tolerant of production and assembly technology Deviations in the position of the lamp, the reflector etc. from the specified target values behaves.
  • the cover strips 13, 14 form two outlet openings for what is generated in the light space 12 Light.
  • the light emerging through the upper exit opening is on the one hand via the middle Subareas 3a, 3b, on the other hand via the upper area 2 of the reflector 1 into the outside space reflected.
  • a sharp light-dark boundary is used as a picture of the top edges the cover strip 13, 14 over the central subareas 3a, 3b on the road or one Test screen shown.
  • the left section 3a produces the essentially horizontal part of the light distribution along the light-dark boundary in the area of Oncoming traffic side of the road.
  • the right section 3b of the reflector creates that part of the light distribution which is essentially along the under one An angle of approximately 15 ° to a horizontal inclined area of the cut-off line located.
  • the middle reflector area 3a, 3b becomes an extraordinarily sharp light-dark boundary generated with a high illuminance below the cut-off line and disappearing illuminance above the cut-off line.
  • someone specific The proportion of light also reaches the area of the transition 6 substantially horizontal transition surface is formed, that which is there Light reflects downwards and reaches the not shown boundary areas of the Reflectors, which are designed so that light incident there is scattered, so that this light no longer causes glare.
  • the headlight according to the invention from the Light source 12 emerging downwards, via the lower region 4 of the reflector 1 in the Light reflected outside also in those below the cut-off line Area emitted.
  • the light emitted into the outside space via the lower area 4 forms a light distribution which essentially corresponds to that of the upper region 2 generated light distribution matches.
  • FIG. 7 A light distribution generated by the central region 3 of the reflector 1 is shown in FIG. 7 shown.
  • the solid lines correspond to so-called Isolux lines, that are lines with constant illuminance.
  • the illuminance is for the innermost Isolux line highest, towards the outside the illuminance decreases.
  • the course of the The light-dark boundary shows the typical shape with a parallel course to the horizon H im Area of an oncoming traffic side GV of a lane FB and a bend and the following Course under approx. 15 ° to a horizon H on a separate traffic side EV. Good to It can also be seen that, in particular, the one lying directly below the horizon H. Area of the roadway FB, on which usually the highest concentration of a vehicle driver is most intensely illuminated.
  • FIG. 8 A typical light distribution as shown by the upper region 2 is shown in FIG. 8 or the lower region 4 of the reflector 1 is generated.
  • Isolux line shown, since the illuminance in the entire area indicated essentially is constant. What is striking about this light distribution is that it is essential in the horizontal direction wider extension of the light distribution compared to the light distribution according to FIG. 7.
  • the area of the roadway FB shows the Light distribution a significant drop below the cut-off line, with glare oncoming traffic can be avoided.
  • FIG. 9 also shows a superposition of the upper, middle and the lower reflector area 2, 3, 4 shown entire light image.
  • This entire light distribution has a sharp cut-off line, the course of which meets legal requirements.
  • the good apron and wide illumination is to recognize.
  • the areas of maximum illuminance are immediately below the H horizon on the roadway FB.
  • the vehicle headlight is designed as a headlight with a clear lens.
  • An optics or scattering properties of the lens are not necessary, because that Desired photo alone using the reflector 1 using one for this provided special lamp 10 is generated. But for even better homogenization the light distribution with regard to illuminance and color mixing To achieve, it can be provided that certain areas of the reflector 1 with Grooves (2 ', 3a', 3b ', 4'), so-called diffuser or scattering grooves, are provided, such as from EP 846 912 A2 of the applicant have become known.
  • 4 is the open space reflector 1 of the headlight according to the invention is shown again in a front view, an advantageous course of the grooves (2 ', 3a', 3b ', 4') in the upper, middle and lower Area of the reflector 1 is indicated.
  • the middle partial areas are approximately 3a, 3b on both sides of the central area 5 in an inner section with grooves (3a ', 3b') provided, which are not shown in the drawing.
  • the areas 3a, 3b are designed without grooves.
  • This outer section of the middle sections 3a, 3b is for generating a high illuminance at the The light-dark boundary on the roadway FB is responsible, a scattering of the light not necessary here.
  • the left section 3a has grooves in its inner section (3a ') with groove planes which are substantially normal to a horizontal plane HE stand by an optical axis X and at different angles to a vertical plane VE run through the optical axis X.
  • the longitudinal axis X is the optical axis X here considered the lamp 10.
  • a normal plane is applied to a tangent as the groove plane to understand a groove bottom assuming a symmetrical groove cross section, see also EP 846 912 A2. With the help of these spreading grooves homogenization is possible of light in the essentially horizontal area of the cut-off line reached.
  • the right middle section 3b of the reflector 1 has an inner section also grooves (3b '), the horizontal extent of which is provided with grooves (3b') Section in the right section 3b is larger than in the left section 3a.
  • the grooves (3b ') initially show a similar course to that Grooves (3a ') of the left area 3a.
  • the groove planes do not only run at different angles to the vertical plane VE, but the groove levels are also beginning to decrease under a decreasing Angle to the right against the horizontal plane HE.
  • the initial angle of about 90 ° between the groove planes and the horizontal plane HE through the optical axis X is reduced to approx.
  • the Upper area 2 and the lower area 4 of the reflector 1 have surface grooves on their entire surface (2 ', 4'). These show a wide variety of courses, these arithmetically were adjusted so that the best possible homogenization of these Reflector areas 2, 4 reflected light is reached.

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  • 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)
EP00890244A 1999-08-16 2000-08-07 Projecteur pour véhicule Expired - Lifetime EP1077347B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT140799 1999-08-16
AT0140799A AT413753B (de) 1999-08-16 1999-08-16 Fahrzeugscheinwerfer

Publications (3)

Publication Number Publication Date
EP1077347A2 true EP1077347A2 (fr) 2001-02-21
EP1077347A3 EP1077347A3 (fr) 2006-01-18
EP1077347B1 EP1077347B1 (fr) 2006-12-27

Family

ID=3513227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00890244A Expired - Lifetime EP1077347B1 (fr) 1999-08-16 2000-08-07 Projecteur pour véhicule

Country Status (3)

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EP (1) EP1077347B1 (fr)
AT (2) AT413753B (fr)
DE (1) DE50013898D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101956955A (zh) * 2010-09-30 2011-01-26 海洋王照明科技股份有限公司 汽车前照灯以及用于汽车前照灯的反射器
CN102486298A (zh) * 2010-12-06 2012-06-06 海洋王照明科技股份有限公司 前雾灯反射器、前雾灯及机动车

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3808086A1 (de) 1988-03-11 1989-09-28 Hella Kg Hueck & Co Reflektor fuer abgeblendete oder abblendbare kraftfahrzeugscheinwerfer
EP0846912A2 (fr) 1996-12-05 1998-06-10 Zizala Lichtsysteme GmbH Phare

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1318683A (fr) * 1962-01-08 1963-02-22 Perfectionnements apportés aux projecteurs à faisceaux coupés, notamment aux projecteurs de croisement pour véhicules automobiles
DE1197825B (de) * 1963-05-07 1965-08-05 Bosch Gmbh Robert Scheinwerfer fuer Kraftfahrzeuge
DE1597925A1 (de) * 1967-12-19 1970-10-01 Bosch Gmbh Robert Fahrzeugscheinwerfer
JP2753914B2 (ja) * 1992-02-05 1998-05-20 株式会社小糸製作所 自動車用前照灯
FR2694373B1 (fr) * 1992-07-30 1994-11-04 Valeo Vision Projecteur de véhicule automobile comportant une lampe à deux filaments pour engendrer sélectivement un faisceau antibrouillard et un faisceau de route.
FR2720476B1 (fr) * 1994-05-26 1996-08-09 Valeo Vision Projecteur comportant une lampe à deux filaments pour engendrer un faisceau coupé et un faisceau non coupé.
JP3394610B2 (ja) * 1994-11-18 2003-04-07 株式会社小糸製作所 自動車用ヘッドランプ
DE19508639A1 (de) * 1995-03-10 1996-09-12 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge
JPH09237504A (ja) * 1996-02-23 1997-09-09 Patent Treuhand Ges Elektr Gluehlamp Mbh 下向き及び上向きライト用自動車前照灯
JP3145925B2 (ja) * 1996-07-18 2001-03-12 株式会社小糸製作所 車輌用前照灯
DE19844839B4 (de) * 1998-09-30 2010-07-22 Automotive Lighting Reutlingen Gmbh Scheinwerfer für Fahrzeuge

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3808086A1 (de) 1988-03-11 1989-09-28 Hella Kg Hueck & Co Reflektor fuer abgeblendete oder abblendbare kraftfahrzeugscheinwerfer
EP0846912A2 (fr) 1996-12-05 1998-06-10 Zizala Lichtsysteme GmbH Phare

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101956955A (zh) * 2010-09-30 2011-01-26 海洋王照明科技股份有限公司 汽车前照灯以及用于汽车前照灯的反射器
CN101956955B (zh) * 2010-09-30 2014-02-19 海洋王照明科技股份有限公司 汽车前照灯以及用于汽车前照灯的反射器
CN102486298A (zh) * 2010-12-06 2012-06-06 海洋王照明科技股份有限公司 前雾灯反射器、前雾灯及机动车
CN102486298B (zh) * 2010-12-06 2013-10-16 海洋王照明科技股份有限公司 前雾灯反射器、前雾灯及机动车

Also Published As

Publication number Publication date
DE50013898D1 (de) 2007-02-08
AT413753B (de) 2006-05-15
ATA140799A (de) 2005-09-15
EP1077347A3 (fr) 2006-01-18
ATE349650T1 (de) 2007-01-15
EP1077347B1 (fr) 2006-12-27

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