EP0485818B1 - Scheinwerfer - Google Patents

Scheinwerfer Download PDF

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Publication number
EP0485818B1
EP0485818B1 EP91118675A EP91118675A EP0485818B1 EP 0485818 B1 EP0485818 B1 EP 0485818B1 EP 91118675 A EP91118675 A EP 91118675A EP 91118675 A EP91118675 A EP 91118675A EP 0485818 B1 EP0485818 B1 EP 0485818B1
Authority
EP
European Patent Office
Prior art keywords
light
headlight
light source
headlight according
lens
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
EP91118675A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0485818A1 (de
Inventor
Edwin Schwaller
Diego Bally
Walter Zürcher
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.)
Bisy Bike-Systems Industrielle Fertigung Von Fahrr
Original Assignee
Vereinigte Drahtwerke AG
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 Vereinigte Drahtwerke AG filed Critical Vereinigte Drahtwerke AG
Publication of EP0485818A1 publication Critical patent/EP0485818A1/de
Application granted granted Critical
Publication of EP0485818B1 publication Critical patent/EP0485818B1/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
    • 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
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • 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 invention relates to a headlamp with a light source arranged in the headlamp axis, with a reflector and with a diffuser arranged in front of the light source, and in particular with a headlamp for relatively weak light sources, such as are present in bicycle lighting systems.
  • the invention also relates to the use of such a headlight as a bicycle lamp.
  • the light generated can be used in an optimal manner. As small a part of it as possible should be lost as stray light.
  • the light of the first origin can be deflected relatively well in the desired direction by the diffusing lens optics in order to generate a corresponding light cone. With the light coming directly from the light source onto the lens, the problem arises that the beam path has to be deflected relatively strongly, for which purpose a collecting lens must be provided on the lens.
  • the converging lens is intended to capture the largest possible solid angle of the directly emitted light, without, however, taking up too large an area of the lens.
  • it has already been proposed to cement a relatively thick converging lens on the inside of the lens, which bundles the direct light from the light source. This solution is, however, complex in terms of production technology.
  • US-A-1 571 139 shows the possibility of placing a converging lens as close as possible in front of the lamp and thus to improve the light output.
  • the light cone emerging from the lamp has a very large aperture, since the diffuser is largely designed as a diffuser. Therefore a large part of the light intensity is lost.
  • Fresnel lenses are used in the lamps according to DE-A-3 317 519, DE-A-1 472 525 and GB-A-120 581. This improves the light output.
  • lamps of this type there is a light spot on the street, the intensity of which rapidly decreases with increasing distance from the lamp.
  • the converging lens structure which is preferably designed as a Fresnel lens, does not require a significant local thickening of the lens, which could not be controlled during manufacture.
  • the diffusing screen thus formed can therefore be efficiently produced in a conventional manner as a one-piece molded part made of plastic or glass.
  • the stray light which is still reduced, is advantageously used to produce a laterally visible, illuminated zone on the headlamp, for which purpose a transparent ring is formed on the periphery of the lens through which false light radially emerges.
  • the headlight has a light source 1, which is preferably is designed as a halogen lamp.
  • the light source is shown in point form in FIG. 1, but is actually designed as a spiral.
  • the light source is arranged in the focal point of a parabolically or elliptically shaped reflector 2.
  • the light rays striking the reflector 2 from the light source are therefore reflected approximately parallel to the headlight axis 3 and thus strike a diffusing screen 4.
  • the diffusing screen 4 is formed from a translucent material, for example a transparent plastic such as PMMA. Their shape essentially determines the beam path of the headlamp.
  • the lens 4 is divided into different zones.
  • a central zone 5 is provided for deflecting the light coming directly from the light source 1.
  • the outer peripheral zones 6, 7, 8 are divided into an upper zone 6, a central zone 7 and a lower zone 8 (cf. FIG. 2) and serve to deflect the light reflected in parallel by the reflector 2.
  • the lens 4 is curved toward the light source 1. This means that the central zone 5 is close to the light source 1 and thus detects a relatively large solid angle of the directly emitted light from the light source.
  • the light incident on the lens at this solid angle is collected by means of a converging lens structure to form a light bundle 10 which is emitted essentially in the direction of the headlight axis 3.
  • the converging lens structure in the central zone 5 is designed as a Fresnel lens 9 arranged concentrically to the axis 3, so that the thickness of the lens 4 remains relatively uniform. This is an important prerequisite for their manufacture as plastic molded articles.
  • the lens in the central zone 5 forms a fourth-order curve in vertical section, which has the effect that the rays passing through this central zone 5 are deflected somewhat more strongly, ie towards the axis 3, than the rays penetrating deeper into the Axis direction 3 run (see FIG. 1).
  • the brightness in the light spot which is generated by the obliquely incident light cone, does not decrease with increasing distance from the headlight.
  • a corresponding configuration of the diffusing screen is present in the edge zones 6, 7, 8 already mentioned, of which only the upper zone 6 and the lower zone 8 are visible in FIG. 1.
  • the diffuser in vertical section forms, in addition to the circle, a fourth-order curve with a correspondingly greater deflection of the higher rays.
  • the light beams 11 and 12 from these zones 6, 8 also lead to a light spot with a regular light distribution on a base in the case of oblique incidence.
  • These zones are viewed in a horizontal section (cf. FIGS. 2 and 3), they have a scattering lens structure 14 of a type known per se, which leads to a lateral divergence of the light cone according to FIG.
  • the edge zone 7 has the same configuration.
  • the headlight designed in this way is used as a bicycle lamp, it produces a substantially trapezoidal spot of uniform brightness on the street at a distance of 4 m to 10 m from the lamp position. Since the direct light of the solid angle detected by the central zone 5 contributes to this, the luminous efficacy can be significantly improved.
  • the transparent ring 15 preferably has a signal color, so that it appears in a side view as a streak glowing in the signal color occurs (see FIG. 4).
  • the scattered light from the headlight contributes to the lateral marking of, for example, a cyclist at night, which is otherwise often only possible with passive reflectors.
  • the transparent ring 15 can also be designed as a mounting element for connecting the reflector 2 and the diffuser 4.
  • Figure 4 shows a possible embodiment of the headlamp described as a bicycle lamp.
  • the headlight with signal ring 15 and reflector 2 is arranged on a housing 16.
  • FIG. 5 shows a somewhat modified embodiment of the diffusing screen 4. As can be seen, this differs from the embodiment according to FIG. 1 only in that the central zone 5 itself once again forms an arch towards the light source 1. It can be achieved that the detected solid angle of the direct light is further increased.
  • the described headlight can also be provided with a reflector ring 16 directed forward. Should the light source 1 or its supply fail, this serves to make the bike recognizable for oncoming traffic at night.
  • the reflector ring 16 made of transparent plexiglass has a back 17 with a reflector structure. It is welded to a ring made of transparent red plexiglass designed as a signal ring 15, through which stray light can escape laterally in the manner described. The whole can be designed as a snap ring for mounting the lens 4 on the reflector 2.
  • the headlamp according to the invention is an integrated, active and passive effective, visual identification in traffic.
  • the described headlamp allows light sources with relatively low power, such as those used in bicycle lighting systems, to be used optimally for light generation by the false light losses are reduced and the light is emitted in an optimal direction, so that an extensive light spot with even light distribution is generated in front of the bicycle on the street.
  • the components, in particular the diffusing screen, can be produced as molded parts in efficient processes.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
EP91118675A 1990-11-12 1991-11-01 Scheinwerfer Expired - Lifetime EP0485818B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3577/90A CH681478A5 (zh) 1990-11-12 1990-11-12
CH3577/90 1990-11-20

Publications (2)

Publication Number Publication Date
EP0485818A1 EP0485818A1 (de) 1992-05-20
EP0485818B1 true EP0485818B1 (de) 1994-06-22

Family

ID=4258992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118675A Expired - Lifetime EP0485818B1 (de) 1990-11-12 1991-11-01 Scheinwerfer

Country Status (8)

Country Link
US (1) US5245515A (zh)
EP (1) EP0485818B1 (zh)
JP (1) JPH04284301A (zh)
AT (1) ATE107755T1 (zh)
CH (1) CH681478A5 (zh)
DE (1) DE59102003D1 (zh)
DK (1) DK0485818T3 (zh)
TW (1) TW203584B (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5945916A (en) * 1996-02-23 1999-08-31 Valeo Vision Indicator light with improved light spreading means
DE102011113627A1 (de) 2011-09-16 2013-03-21 Volkswagen Aktiengesellschaft Lichtscheibe für eine Fahrzeugleuchte und Fahrzeugleute mit einer solchen Lichtscheibe

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11194189A (ja) * 1997-10-13 1999-07-21 Mitsubishi Materials Corp 耐食性およびクリープ特性にすぐれた原子炉燃料被覆管用Ｚｒ合金管の製造方法
US6354715B1 (en) 1998-01-26 2002-03-12 Bison Sportslights, Inc. Flashlight
DE69931466T2 (de) * 1998-01-26 2006-09-21 Mag Instrument, Inc., Ontario Stablampe
EP1055869A3 (en) * 1999-05-28 2002-03-06 Corning Incorporated Glass lens for automotive lighting
US6554456B1 (en) * 2000-05-05 2003-04-29 Advanced Lighting Technologies, Inc. Efficient directional lighting system
AT500415B8 (de) * 2001-03-13 2007-02-15 Zizala Lichtsysteme Gmbh Fahrzeugscheinwerfer
US20040264201A1 (en) * 2003-06-30 2004-12-30 Guide Corporation, A Delaware Corporation Chromatic effect using light sources and condensing lenses
JP2005251435A (ja) * 2004-03-01 2005-09-15 Koito Mfg Co Ltd 車両用前照灯
RU2013138463A (ru) * 2011-01-19 2015-02-27 Конинклейке Филипс Электроникс Н.В. Осветительное устройство и светильник, содержащий осветительное устройство
DE102011116028A1 (de) * 2011-10-17 2013-04-18 Busch & Müller KG Scheinwerfer mit prismatischer Linse
CN103322513B (zh) * 2012-03-23 2015-08-12 大连工业大学 用于led产生环形光斑的混合式折反射器及其使用方法
DE102012102732B4 (de) * 2012-03-29 2015-12-31 Siteco Beleuchtungstechnik Gmbh Leuchte mit Lichtabstrahlung in einen Randbereich
CN102874349A (zh) * 2012-09-27 2013-01-16 力帆实业(集团)股份有限公司 摩托车前照灯壳组件
CN103017039B (zh) * 2012-12-16 2015-01-28 广州市佛达信号设备有限公司 一种led警示灯
JP6048842B2 (ja) * 2014-03-17 2016-12-21 パナソニックＩｐマネジメント株式会社 照明器具
JP2017074820A (ja) * 2015-10-13 2017-04-20 スズキ株式会社 車両の報知システム
DE202018002106U1 (de) * 2018-04-25 2019-07-29 Büchel GmbH & Co.Fahrzeugteilefabrik KG Scheinwerfer mit Zeichen, insbesondere Logo
CN111197726A (zh) * 2018-11-20 2020-05-26 常州星宇车灯股份有限公司 一种全反射式厚壁聚光器和照明装置
DE102022124330A1 (de) 2022-09-22 2024-03-28 Ledlenser GmbH & Co. KG Leuchteinheit und Leuchte

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US120581A (en) * 1871-11-07 Improvement in plow-wheels
US1433292A (en) * 1917-09-29 1922-10-24 Charles G Myers Light concentrator and projector
GB120581A (en) * 1917-11-05 1919-02-13 Joseph Phillips Ogden Improvements in Glasses or Lenses for Headlights.
US1571139A (en) * 1923-12-01 1926-01-26 James G Nolen Refractor
US1674460A (en) * 1925-10-24 1928-06-19 William H Zorger Automobile headlight lens
US1788935A (en) * 1926-06-30 1931-01-13 William H Wood Vehicle headlight
DE1101985B (de) * 1958-07-22 1961-03-09 Westfaelische Metall Ind K G H Mit einem Rueckstrahler vereinigte Leuchte fuer Kraftfahrzeuge
US3235720A (en) * 1963-08-13 1966-02-15 L D Bridge Company Inc Vehicle light assembly
US3244869A (en) * 1964-03-23 1966-04-05 Dominion Auto Access Vehicle lamp
DE1472525A1 (de) * 1965-12-09 1969-01-23 Peter Nawrath Decken-,Strassen- und Werkplatzleuchte
US4213171A (en) * 1976-06-24 1980-07-15 Sassmannshausen Knut Lighting fixture with side escape window
IT1160893B (it) * 1978-10-30 1987-03-11 Iao Industrie Riunite Spa Fanale per autoveicoli
DE3143086A1 (de) * 1980-10-31 1982-08-19 Saßmannshausen, Knut Otto, 6580 Idar-Oberstein "hohlspiegelleuchte"
EP0097449B1 (en) * 1982-06-19 1986-04-09 Britax Vega Limited Vehicle lamp assembly
EP0098062B1 (en) * 1982-06-24 1986-04-09 Britax Vega Limited Vehicle lamp assemblies
DE3317519A1 (de) * 1983-05-13 1984-11-15 Robert Bosch Gmbh, 7000 Stuttgart Lichtsammelplatte

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5945916A (en) * 1996-02-23 1999-08-31 Valeo Vision Indicator light with improved light spreading means
DE102011113627A1 (de) 2011-09-16 2013-03-21 Volkswagen Aktiengesellschaft Lichtscheibe für eine Fahrzeugleuchte und Fahrzeugleute mit einer solchen Lichtscheibe

Also Published As

Publication number Publication date
TW203584B (zh) 1993-04-11
DK0485818T3 (da) 1994-09-26
EP0485818A1 (de) 1992-05-20
ATE107755T1 (de) 1994-07-15
CH681478A5 (zh) 1993-03-31
US5245515A (en) 1993-09-14
DE59102003D1 (de) 1994-07-28
JPH04284301A (ja) 1992-10-08

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