EP0474806B1 - Phare pour vehicule a moteur - Google Patents

Phare pour vehicule a moteur Download PDF

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Publication number
EP0474806B1
EP0474806B1 EP91905062A EP91905062A EP0474806B1 EP 0474806 B1 EP0474806 B1 EP 0474806B1 EP 91905062 A EP91905062 A EP 91905062A EP 91905062 A EP91905062 A EP 91905062A EP 0474806 B1 EP0474806 B1 EP 0474806B1
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
gas discharge
lens
headlamp
glass
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
EP91905062A
Other languages
German (de)
English (en)
Other versions
EP0474806A1 (fr
Inventor
Bodo Remus
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0474806A1 publication Critical patent/EP0474806A1/fr
Application granted granted Critical
Publication of EP0474806B1 publication Critical patent/EP0474806B1/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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • 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
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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 headlight for motor vehicles according to the preamble of claim 1.
  • Such a headlight is known from DE-OS 35 19 611.
  • This headlight has a reflector into which a gas discharge lamp protrudes.
  • the light outlet opening of the headlight is covered with a lens.
  • the gas discharge lamp also emits electromagnetic radiation in the invisible range, which can lead to interference, for example, in radio reception in motor vehicles.
  • gas discharge lamps such as fluorescent tubes
  • the coating can also be designed like a grid.
  • the gas discharge lamps are intended for general lighting purposes, such as room lighting, where it is not necessary that the light emitted by the gas discharge lamp be distributed in a certain way.
  • these gas discharge lamps are not suitable for use in headlights for motor vehicles, since the light emitted by the gas discharge lamp must be distributed in a very specific way in order to comply with legal regulations for the light distribution, so that the light beam emerging from the headlight is influenced by the coating must be avoided.
  • specially designed gas discharge lamps are required for use in headlights for motor vehicles with regard to their operating properties and dimensions.
  • a traffic signal system is known from Patent Abstracts of Japan, Volume 4, No. 14 (E-169), Jan. 31, 1980, JP-A-54-154996, in which a gas discharge lamp is used as a light source.
  • the signaling system has a housing in which a reflector is arranged and the light exit opening of which is covered with a colored lens.
  • a transparent, radiation-absorbing, electrically conductive coating To shield interference radiation emitted by the gas discharge lamp, an additional part is arranged between the gas discharge lamp and the lens, which is provided with a transparent, radiation-absorbing, electrically conductive coating. In the case of the signal system, it is insignificant for its function if the coating exerts an influence on the light emerging from it.
  • the headlamp according to the invention with the features of claims 1 to 3 has the advantage over the headlamp known from document DE-A-35 19 611 that shielding radiation emitted by the gas discharge lamp is shielded.
  • the headlight according to claims 1 and 2 also has the advantage that no additional component is required, since the coating is arranged on the lens or lens present in the headlight.
  • the headlight according to claim 3 also has the advantage that it is ensured by the arrangement of the shielding device in the unsharpness of the beam path that it does not interfere with the light distribution generated by the headlight.
  • FIG. 1 shows a first embodiment of a headlamp in longitudinal section in a greatly simplified representation
  • FIG. 2 shows the headlamp in front view
  • FIG. 3 shows a second embodiment of the headlamp in longitudinal section.
  • FIG. 1 shows a first exemplary embodiment of a headlight for motor vehicles, which has a reflector 10, into which a gas discharge lamp 11 is inserted.
  • the light exit opening of the headlight is covered with a lens 12.
  • the lens 12 is provided with a transparent metallic coating 14 which is grounded and is shielded by the electromagnetic radiation which arises during the discharge process within the glass bulb 13 and which could interfere with fadio waves.
  • FIG. 3 shows a second exemplary embodiment of a headlight based on the projection principle, in which a diaphragm 15, a lens 16 and the lens 12 are arranged in the beam path of the light rays reflected by the reflector 10.
  • the upper edge of the diaphragm 15 is imaged by the lens as the light-dark boundary of the light distribution.
  • the lens 16 is provided with a coating 14 as described in FIG. 1 for shielding the interference radiation, the coating 14 also being grounded.
  • a shielding device 18 can be arranged in the unsharpness area of the beam path between the gas discharge lamp 11 and the lens 16 or between the lens 16 and the lens 12, which is shown in FIG. 2 and consists of a large number of thin metallic wires 19 exists, which are arranged at such a distance from one another transversely to the light exit direction that sufficient light can pass between them.
  • the wires 19 are grounded and can also be arranged in a different pattern, for example like a fence.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Le phare proposé comprend un réflecteur (10) dans lequel est montée une lampe luminescente à gaz (11). L'ouverture de sortie de la lumière de ce phare est recouverte d'une vitre (12). Pour blinder le phare contre les rayonnements perturbateurs émis par la lampe luminescente à gaz (11) qui pourraient perturber la réception des ondes radio dans les véhicules à moteur, la vitre (12) est pourvue d'un revêtement métallique transparent qui absorbe les rayonnements perturbateurs.

Claims (3)

  1. Projecteur de véhicules automobiles comportant un réflecteur (10) dans lequel pénètre une lampe à décharge de gaz (11) et ayant un disque transparent (12) recouvrant l'orifice de sortie de lumière du projecteur, caractérisé en ce que le disque transparent (12) est muni pour servir d'écran au rayonnement parasite émis par la lampe à décharge de gaz (11), d'un revêtement métallique (14), transparent, absorbant le rayonnement parasite.
  2. Projecteur de véhicules automobiles comportant un réflecteur (10) dans lequel pénètrent une lampe à décharge de gaz (11) et ayant un disque transparent(12) à la lumière recouvrant l'orifice de sortie de la lumière du projecteur, caractérisé en ce que dans la zone comprise entre la lampe à décharge de gaz (11) et le disque transparent (12), se trouve une lentille (16) munie d'une revêtement métallique (14), transparent, absorbant le rayonnement parasite pour la protection contre le rayonnement parasite émis par la lampe à décharge de gaz (11).
  3. Projecteur de véhicules automobiles comportant un réflecteur (10) dans lequel pénètre une lampe à décharge de gaz (11) et ayant un disque transparent (12) recouvrant l'orifice de sortie de lumière du projecteur, caractérisé en ce qu'entre la lampe à décharge de gaz (11) et le disque transparent (12), se trouve une lentille (16) qui donne l'image d'une arête d'un diaphragme (15) prévu entre la lentille (16) et la lampe de décharge de gaz (11) comme limite clarté/obscurité du faisceau lumineux émis par le projecteur et en ce que dans la zone non nette du chemin des faisceaux lumineux entre le disque transparent (12) et la lampe à décharge de gaz (11), pour la protection du rayonnement parasite émis par la lampe à décharge de gaz (11), il y a un dispositif formant écran (18) qui se compose de fils métalliques minces disposés de manière écartée les uns des autres.
EP91905062A 1990-04-04 1991-03-16 Phare pour vehicule a moteur Expired - Lifetime EP0474806B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4010829 1990-04-04
DE4010829 1990-04-04
DE4101722 1991-01-22
DE4101722A DE4101722A1 (de) 1990-04-04 1991-01-22 Scheinwerfer fuer kraftfahrzeuge
PCT/DE1991/000229 WO1991015711A1 (fr) 1990-04-04 1991-03-16 Phare pour vehicule a moteur

Publications (2)

Publication Number Publication Date
EP0474806A1 EP0474806A1 (fr) 1992-03-18
EP0474806B1 true EP0474806B1 (fr) 1995-05-31

Family

ID=25891850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91905062A Expired - Lifetime EP0474806B1 (fr) 1990-04-04 1991-03-16 Phare pour vehicule a moteur

Country Status (4)

Country Link
EP (1) EP0474806B1 (fr)
JP (1) JPH04506281A (fr)
DE (2) DE4101722A1 (fr)
WO (1) WO1991015711A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5343370A (en) * 1990-10-23 1994-08-30 Koito Manufacturing Co., Ltd. Motor vehicle headlamp
FR2717982B1 (fr) * 1994-03-24 1996-05-15 Valeo Vision Dispositif de blindage électromagnétique de systèmes d'éclairage et/ou de signalisation de véhicule du type lampe à décharge tubulaire.
FR2755747B1 (fr) * 1996-11-13 1999-01-29 Valeo Vision Projecteur a lampe a decharge
CN100538990C (zh) * 2003-03-18 2009-09-09 皇家飞利浦电子股份有限公司 气体放电灯
KR20050111770A (ko) * 2003-03-18 2005-11-28 코닌클리즈케 필립스 일렉트로닉스 엔.브이. 가스 방전 램프

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1072019A (fr) * 1953-01-07 1954-09-07 Perfectionnements aux lampes à décharge
US3885150A (en) * 1973-12-03 1975-05-20 John Ott Lab Shielded luminaire
DE3519611A1 (de) * 1985-05-31 1986-12-04 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Kraftfahrzeugscheinwerfereinheit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, volume 4, No. 14 (E-169), 31 January 1980, & JP-A 54154996 *

Also Published As

Publication number Publication date
DE4101722A1 (de) 1991-10-10
DE59105614D1 (de) 1995-07-06
JPH04506281A (ja) 1992-10-29
EP0474806A1 (fr) 1992-03-18
WO1991015711A1 (fr) 1991-10-17

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