EP0232843B1 - Scheinwerfer für Kraftfahrzeuge - Google Patents

Scheinwerfer für Kraftfahrzeuge Download PDF

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Publication number
EP0232843B1
EP0232843B1 EP87101484A EP87101484A EP0232843B1 EP 0232843 B1 EP0232843 B1 EP 0232843B1 EP 87101484 A EP87101484 A EP 87101484A EP 87101484 A EP87101484 A EP 87101484A EP 0232843 B1 EP0232843 B1 EP 0232843B1
Authority
EP
European Patent Office
Prior art keywords
reflector
filament
headlight according
capsule
headlight
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
EP87101484A
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English (en)
French (fr)
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EP0232843A2 (de
EP0232843A3 (en
Inventor
Robert E. Levin
George J. English
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.)
Osram Sylvania Inc
Original Assignee
GTE Products Corp
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Filing date
Publication date
Application filed by GTE Products Corp filed Critical GTE Products Corp
Publication of EP0232843A2 publication Critical patent/EP0232843A2/de
Publication of EP0232843A3 publication Critical patent/EP0232843A3/en
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Publication of EP0232843B1 publication Critical patent/EP0232843B1/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
    • F21S41/10—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
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F21S41/166—Incandescent light sources, e.g. filament or halogen lamps characterised by the shape of the filament
    • 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
    • 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
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/333—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings

Definitions

  • the invention concerns a motor vehicle headlight comprising a reflector having a concave reflecting portion of substantially parabolic configuration defining a forward opening, a cover secured to said reflector for providing a cover for said opening, and a lighting capsule located within said reflector and including an envelope portion having a coiled filament positioned therein.
  • a headlight of this kind is disclosed in the European Patent Application Publication number EP-A-0 158 328.
  • Previous headlights as typically utilized in automobile headlighting systems have heretofore been relatively large in total frontal area.
  • One factor which contributed significantly to this requirement was the overall vertical height of such headlights.
  • such headlights whether of round or rectangular configuration, typically required a minimal height of at least 10,16 cm (four inches).
  • the motor vehicle designed to accommodate such headlights in turn was required to possess a relatively large frontal area to serve as a housing for same.
  • the vehicle exhibited relatively high aerodynamic drag which, as is known, constitutes the principal cause of energy consumption at normal highway speeds. Reducing the drag coefficient in such a motor vehicle in turn results in improved vehicle fuel consumption.
  • the table below represents respective dimensional constraints for many previous headlight systems.
  • a headlighting system which utilizes a plurality of individual lighting modules (headlights) which each possess a relatively short overall height (e.g., 5,08 cm or two inches). Accordingly, a motor vehicle utilizing such a system can in turn possess a relatively lower front portion to in turn assure improved aerodynamic characteristics.
  • the headlight of the instant invention also possesses a relatively short vertical height and is thus able to assure improved motor vehicle aerodynamics when utilized in such a vehicle.
  • the headlight of the instant invention is able to provide enhanced forward output using a reflector having a relatively small frontal area and an internal light source (coiled filament) having a predetermined length to diameter ratio.
  • the invention is thus adapted for use in a headlighting system possessing additional, similar components, or, alternatively, as part of the headlighting system defined in the aforementioned prior art.
  • Such a headlight can be easily utilized with other headlights as part of an overall headlighting system for a motor vehicle wherein the total frontal area required in the vehicle to accommodate such a system is substantially reduced.
  • said reflector has a focal length within the range of 5,08 mm (0.2 inch) to 12,7 mm (0,5 inch), that the coiled filament has a substantially cylindrical configuration, that the length of the filament is smaller than the focal length, and that said capsule is located within said reflector such that said envelope portion is positioned within and substantially surrounded by said concave reflecting portion and said coiled filament is substantially centered at the focal point of said reflector, said coiled filament having a length to diameter ratio of less than 2:1.
  • Headlight 10 includes a reflector 11 having a concave reflecting portion 13 of substantially parabolic configuration. Portion 13 is internally coated with a reflective coating material 15 (e.g.. aluminum). Coating 15 is shown in FIG. 3. Concave reflecting portion 13 defines a forward opening 16, which is of rectangular configuration. Another example of a motor vehicle headlight having an opening of substantially rectangular configuration is shown and described in U.S. patent US-A-4,545,001.
  • Reflector 11 further includes a projecting neck portion 17 which extends from the rear, apex part of the reflector and which includes a relatively large aperture (recessed portion) 19 therein. Closure for neck portion 17 is provided by a rear wall 21 which may be secured to or which may form part of neck 17.
  • Reflector 11 is a glass-filled thermoplastic, preferably one sold under the product name "Ryton” by Philips Petroleum, Inc., Bartlesville, Oklahoma.
  • An alternative plastic suitable for the reflector is a mineral-filled nylon.
  • cover 23 Secured to the front of reflector 11 and providing a cover for the forward opening thereof is a cover member 23.
  • Cover 23, as illustrated, is of planar configuration, similar to the forward opening 16 defined by reflector 11.
  • cover 23 serves as a lens member and thus includes a plurality of lensing elements 25 located on an internal surface thereof facing the invention's lighting capsule 27. These lensing elements are arranged in a predetermined pattern to provide either the high or low beam functions for headlight 10.
  • Cover 23 is preferably of glass material but alternatively may be of plastic (e.g., a polycarbonate). If glass, cover 23 is secured to reflector 11 using a suitable adhesive known in the art. If of plastic, cover 23 may be similarly attached or secured to the reflector using an alternative means such as ultrasonic welding.
  • cover 23 may be clear (transparent and devoid of lensing elements) should headlight 10 be utilized with a separate lensing member located immediately in front of cover 23.
  • a separate lensing member located immediately in front of cover 23.
  • cover 23 serves as a lens number in the manner depicted in FIG. 1.
  • headlight 10 further includes a lighting capsule 27 which serves as the invention's light source.
  • capsule 27 is located within reflector 11 and includes an envelope portion 29 having therein a coiled filament 31. Understandably, filament 31 provides the light source for headlight 10 upon electrical energization thereof.
  • Capsule 27 is preferably a tungsten halogen capsule wherein filament 31 is of tungsten material and the sealed envelope 29 includes a halogen gas therein.
  • the halogen cycle is known in the lighting field and further explanation is thus not deemed necessary.
  • a tungsten halogen lamp is described in U.S. Patent US-A-4,262,229. As further shown in FIG.
  • capsule 27 also includes a press sealed end portion 35 located adjacent the hollow envelope 29 and in which is positioned a pair of lead-in conductors 37 which are electrically coupled to filament 31.
  • the preferred material for capsule 27 is glass (e.g., quartz) while that for the lead-in conductors is preferably nickel or molybdenum.
  • Conductors 37 are sealed within end 35 during formation thereof and may include an interconnecting molybdenum foil 39 as part thereof. Use of such a foil in tungsten halogen lamps as known. Understandably, each lead-in conductor provides a path for electrical current when coupled to an appropriate external connector or the like which forms part of the motor vehicle's electrical system.
  • Each of the externally projecting ends of conductors 37 is rigid in construction and is firmly positioned and passes through the electrically insulative back wall 21 of reflector 11. This securement may be accomplished by ultrasonic welding or, alternatively, using a suitable adhesive. In either event, this form of retention serves to positively orient capsule 27 in the position depicted without the need for additional clamping members or the like about press sealed end 35.
  • capsule 27 is positioned within reflector 11 such that envelope portion 29 is located within and substantially surrounded by the parabolic, concave reflecting portion 13.
  • coiled filament 31 is substantially centered at the focal point FP (FIG. 3) of the reflector.
  • coiled filament 31 is of substantially cylindrical configuration (FIG. 2) and possesses a length to diameter (width) ratio of less than 2:1. The length dimension is represented by the letter L in FIG. 2 while the diameter (or width) dimension is depicted by the letter W in FIG. 2.
  • the length L of the coil must be small in comparison to the focal length FL of the nominally parabolic reflector. This requirement is necessary to assure that the bundle of rays reflected at each point on the reflective surface will have sufficiently small divergence such that said reflected light is efficiently utilized in the usual automotive headlamp light distribution pattern; that is, a distribution with greater angular divergence horizontally than vertically.
  • the filament possesses a length that does not exceed approximately 30 percent of the reflector focal length.
  • Utilization of a filament structure possessing the above dimensional requirements in combination with a parabolic reflector having a relatively short focal length (FL in FIG. 3) has resulted in a headlight possessing enhanced forward light output.
  • use of such a reflector enables greater flux collection efficiency for the light emitted from filament 31.
  • utilization of a filament having the described length to diameter ratio insures that elemental beam spread leaving such a reflector is never much greater in the vertical direction than in the horizontal direction. Excessive vertical spread represents wasted light from such a headlight because the required vertical spread is significantly less than the corresponding horizontal requirement.
  • the forward projected light from each elemental beam contributes greater to the desired forward, substantially horizontal pattern if its spread in both the vertical and horizontal directions is substantially the same. Excessive vertical spread by such a beam also increases the amount of glare from a headlight.
  • Coiled filament 31 which may also be of coiled-coil configuration (FIG. 5), is preferably located axially along the reflector's optical axis OA-OA (FIG. 3). Alternatively, filament 31 may lie orthogonal to the optical axis provided it is of course centered at focal point FP.
  • the reflector of the invention possesses a relatively short focal length. As further stated, this results in a reflector possessing increasing optical efficiency.
  • the parabolic upper and lower reflecting surfaces are restricted by substantially horizontal planes to thus deprive the reflector of much of its parabolic reflecting regions. As a result, flux incident on these horizontal planes is lost from the principal beam of the headlight. Utilization of a shorter focal length and minimal horizontal surfaces reduces the solid angle of flux interception by these planar areas for a given forward open area of rectangular configuration. As shown in FIG.
  • reflector 11 utilizes minimal cut-off to the parabolic reflecting surfaces thereof while still maintaining the aforementioned extremely small vertical height (about two inches or less).
  • reflector 11 possessed a focal length within the range of from about 5,08 mm (0.2 inch) to about 12,7 mm (0.5 inch).
  • Such a length is clearly extremely small, particularly when considering that required in the headlights utilized in the systems listed in the aforementioned TABLE.
  • headlights require a focal length in the range of from 2,54 to 3,81 cm (1.0 to 1.5 inches).
  • the overall vertical height (H in FIG. 1) for headlight 10 is very small.
  • the preferred vertical height H for headlight 10 is within the range of from about only 3,81 to 6,35 cm (1.5 to about 2.5 inches).
  • the corresponding width dimension (in a direction toward and away from the viewer in FIG. 1) for the reflector's rectangular opening is preferably within the range of from about only 50,8 to 76,2 mm (2.0 to about 3.0 inches).
  • headlight 10 possesses a forward rectangular opening within the range of from 19,36 to 48,39 cm2 (about 3.0 square inches to about 7.5 square inches).
  • the ratio of the value of such a rectangular open area to the value of the relatively short focal length of reflector 11 is within the range of 15.24 cm2:1 cm (6.0 inch2:1 inch) to 95.25 cm2:1 cm (37.5 inch2:1 inch).
  • a headlight was made wherein the plastic reflector possessed a rectangular opening having a height of about 5,08 mm (2.0 inches) and a correspondence width of 6,35 mm (2.5 inches). The corresponding focal length was only about 7,62 mm (0.30 inch) and the filament's length to diameter ratio was an ideal 1:1.
  • the coil possessed an outer diameter of about 1,651 mm (0.065 inch).
  • the planar cover which provided the closure for the reflector's rectangular opening was of glass material and included the aforedescribed internal lensing elements.
  • the lighting capsule is operational at low wattages.
  • low wattage is meant a wattage within the range of from about ten to about twenty-five watts.
  • headlight 10 is preferably utilized in combination with at least three additional similar components to form an overall array of four such components. Two such arrays are utilized per vehicle, with each array being positioned on one side thereof. Even further, each of these headlights is preferably arranged in a horizontal, planar orientation such as depicted in U.S. Patent 4,545,001. This is not meant to limit the invention, however, in that these arrays may be successfully arranged in different orientations to thus accommodate the vehicle's forward shape.
  • Capsule 27 is oriented within reflector 11 such that the press sealed end 35 is located within (and surrounded by) the extending neck portion 17.
  • This arrangement serves to substantially prevent light scatter from headlight 10 which in turn can contribute to the aforementioned glare problem.
  • the press sealed end 35 of a capsule such as depicted herein will adversely effect the capsule's light output. Accordingly, positioning of this part of the capsule within a recessed area of the reflector serves to prevent such scattering, particularly if the internal surfaces of the neck portion 17 do not include a reflective coating thereon. It is seen in FIG. 3 that the described reflective coating 15 does not extend into this recessed area of the reflector. The above positioning relationship thus serves to further assure optimum light output for the instant invention.
  • FIG. 4 there is provided a chart which illustrates the relationship between relative light output in comparison to the ratio of filament length to diameter for the low wattage coils.
  • a relatively high ratio of about 4:1 provides about twenty percent less relative light in comparison to an ideal ratio of 1:1 as taught herein.
  • This light output is measured within a field of from 0° to a negative 4.25° with respect to horizontal.
  • the 0° coordinate of the field is that horizontal line which intersects the optical axis of the headlight when the headlight is faced in that direction.
  • the negative 4.25° coordinate is that horizontal line at approximately 4.25° below the horizontal 0° line.
  • This field understandably is located at a distance forward of the headlight.
  • FIG. 5 there is shown a filament structure 31' in accordance with a preferred embodiment of the invention.
  • Filament 31' is of coiled-coil construction and produced from tungsten wire. Formation is achieved by winding this wire about a suitable mandrel (e.g., molybdenum rod) to form a single coiled member. This structure is then formed (coiled) to provide the shape depicted in FIG. 5. A suitable high temperature wax is then applied to the end segments of the structure and the structure is then acid etched to remove the mandrel, excluding of course the protected end segments. Accordingly, the mandrel rod sections 41 remain in place and are surrounded by the respective internal ends of lead-in conductors 37'.
  • a suitable mandrel e.g., molybdenum rod
  • the resulting coiled-coil filamentary material is axially oriented along the optical axis OA-OA as shown, as well as being centered at focal point FP.
  • the mandrel-containing ends are not activated (do not glow) upon filament energization due to the thermal "quenching" by the mandrel material. Only the non-protected portions (defined substantially by the L and W dimensional arrows) will glow during energization.
  • This unique arrangement enables formation of a filament structure of coiled-coil configuration wherein the ideal 1:1 ratio of length to diameter is possible, thus assuring a substantial point source of light for reflector 11.
  • Utilization of a plurality (e.g., four) of headlights of the type defined herein within each of two spaced arrays for a motor vehicle provides several advantages over many known prior art systems.
  • the use of multiple sources of the number mentioned provides desired redundancy in that more than one section of the overall system provides illumination to the same region of space (forward pattern).
  • a major portion of the forward light pattern will not be totally lost as is the situation with many existing headlight systems (typically including a total of only two or four headlights).
  • about seventy-five percent of the total coverage for any given forward component remains upon the failure of a single headlight in the system.
  • the headlight reflector provides beam elements suitable for developing the high intensity gradients required for the sharp cut-off of the low beam pattern near the horizontal plane through the vehicle's light source.
  • a greater percentage of the net reflector area for developing high intensities near the horizontal with minimal glare in the upper left quadrant (toward oncoming drivers) is possible utilizing a headlight as defined herein in view of the utilization of several individual reflector elements.
  • an increase in the number of individual headlight units in turn increases the flexibility of optimizing both high and low beams. This is possible by switching (activating) selected headlight units for either high or low beam or leaving other units energized for both patterns.
  • Present headlight systems in which two filaments are activated in a single lens-reflector headlight unit do not typically possess such flexibility. With these existing systems, the lens elements can be optimized for only one pattern and switching to a second filament produces at best a compromised light distribution.
  • the small vertical dimension and the freedom to configure various arrangements of a plurality of small headlamps as taught herein enhances the ability to form aerodynamic front ends for vehicles utilizing the invention.
  • the reflector possesses a relatively short focal length and the coiled filament utilized in the headlight's lighting source (capsule) possesses already a predetermined length to diameter ratio (less than about 2:1) so as to provide optimum light output for the headlight such that a finished product having a small vertical height (e.g., about 5,08 cm or two inches) can be produced.
  • a predetermined length to diameter ratio less than about 2:1

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

Claims (14)

  1. Kraftfahrzeug-Scheinwerfer (10) mit:
    einem einen konkaven reflektierenden Bereich (12) von im wesentlichen parabolischer Gestalt aufweisenden Reflektor (11), der eine vordere Öffnung (16) definiert, einem eine Abdeckung für diese Öffnung (16) bildenden, an dem Reflektor (11) befestigten Deckel (23), und mit einer innerhalb des Reflektors (11) angeordneten Lichtkapsel (27) mit einem Hüllenteil (29), in dem eine Drahtwendel (31) angeordnet ist, dadurch gekennzeichnet, daß der Reflektor (11) eine Focallänge (FL) im Bereich von 5,08 mm (0.2 Zoll) bis 12,7 mm (0.5 Zoll) aufweist, daß die Drahtwendel (31) eine im wesentlichen zylindrische Gestalt besitzt, daß die Länge (L) der Wendel (31) kleiner als die Focallänge (FL) ist, und daß die Kapsel (27) innerhalb des Reflektors (11) derart positioniert ist, daß der Hüllenteil (29) innerhalb des konkaven, reflektierenden Bereichs (13) angeordnet und von diesem umgeben ist, wobei die Drahtwendel (31) im wesentlichen am Focus des Reflektors (11) zentriert ist und die Drahtwendel (31) ein Verhältnis ihrer Länge zu ihrem Durchmesser von weniger als 2:1 aufweist.
  2. Scheinwerfer nach Anspruch 1, bei welchem die vordere Öffnung (16) im wesentlichen eben und von rechteckiger Gestalt ist und das Verhältnis des Wertes der Fläche der rechteckigen Öffnung zum Wert der Focallänge des Reflektors (11) im Bereich von 6.0:1 bis 37.5:1 ist.
  3. Scheinwerfer nach Anspruch 2, bei welchem die Fläche der rechteckigen Öffnung (16) im Bereich zwischen 19,36 cm² (3.0 Quadratzoll) bis 48,39 cm² (7.5 Quadratzoll) groß ist.
  4. Scheinwerfer nach Anspruch 1, bei welchem das Verhältnis der Länge zum Durchmesser der Drahtwendel (31) 1:1 ist.
  5. Scheinwerfer nach Anspruch 1, bei welchem die Länge der Drahtwendel (31) nicht größer ist als 30 % der Focallänge des Reflektors (11).
  6. Scheinwerfer nach Anspruch 1, bei welchem der Reflektor (11) einen Halsteil (17) aufweist, der von der Rückseite des Reflektors vorsteht und eine Öffnung (19) besitzt, und bei welchem die Kapsel (25) ferner einen abgedichteten Endteil (35) besitzt, der an den Hüllenteil (29) angrenzt und innerhalb der Öffnung (19) angeordnet ist, um Lichtstreuung im wesentlichen zu verhindern.
  7. Scheinwerfer nach Anspruch 6, bei welchem die Kapsel (27) eine Wolfram-Halogen-Kapsel und das abgedichtete Ende (35) ein Quetschdichtungsende sind.
  8. Scheinwerfer nach Anspruch 7, bei welchem die Kapsel (27) ferner ein Paar Zuleitungen (37) besitzt, das an der Drahtwendel (31) elektrisch angeschlossen ist, im wesentlichen innerhalb des Quetschdichtungsendes (35) angeordnet ist und von diesem vorsteht.
  9. Scheinwerfer nach Anspruch 8, bei welchem der Halsteil (17) des Reflektors (11) eine Rückwand (21) aufweist, wobei die vorstehenden Teile der Zuleitungen (37) innerhalb der Rückwand (21) und durch diese hindurchtretend angeordnet sind.
  10. Scheinwerfer nach Anspruch 1, bei welchem der an der vorderen Öffnung (16) des Reflektors (11) befestigte Deckel (23) ein Linsendeckel ist.
  11. Scheinwerfer nach Anspruch 10, bei welchem der Linsendeckel (23) ein Mehrzahl von Linsenelementen (25) aufweist, die an der inneren Fläche des Linsendeckels (23) der Lichtkapsel (27) zugewandt angeordnet sind.
  12. Scheinwerfer nach Anspruch 10, bei welchem der Reflektor (11) aus Kunststoff und der Linsendeckel (23) aus Glas bestehen.
  13. Scheinwerfer nach Anspruch 1, bei welchem die Wendel (31) einen doppelwendelförmigen Aufbau und ein paar Endsegmente besitzt, von denen jedes eine Materialmenge (41) zum thermischen Löschen der Endsegmente aufweist, um eine Aktivierung derselben während der Speisung der Wendel (31) zu verhindern.
  14. Scheinwerfer nach Anspruch 13, bei welchem die Lichtkapsel (27) zusätzlich ein Paar von Zuleitungen (37) aufweist, von denen jede mit einem entsprechenden Endsegment der Wendel verbunden ist.
EP87101484A 1986-02-06 1987-02-04 Scheinwerfer für Kraftfahrzeuge Expired - Lifetime EP0232843B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US82652686A 1986-02-06 1986-02-06
US826526 1986-02-06

Publications (3)

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EP0232843A2 EP0232843A2 (de) 1987-08-19
EP0232843A3 EP0232843A3 (en) 1989-06-07
EP0232843B1 true EP0232843B1 (de) 1993-08-11

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EP (1) EP0232843B1 (de)
JP (1) JPH0821370B2 (de)
CA (1) CA1270036A (de)
DE (1) DE3786931T2 (de)

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JPH01164661U (de) * 1988-05-10 1989-11-16
CN1203520C (zh) * 1999-06-03 2005-05-25 皇家菲利浦电子有限公司 电灯/反射镜单元
DE10035401B4 (de) * 2000-07-19 2006-01-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Halogenglühlampe für Kraftfahrzeugscheinwerfer
JP5339914B2 (ja) 2005-11-21 2013-11-13 インテグリス・インコーポレーテッド 低減された形状要因を有するポンプのためのシステムと方法
US8083498B2 (en) 2005-12-02 2011-12-27 Entegris, Inc. System and method for position control of a mechanical piston in a pump
JP4991834B2 (ja) * 2009-12-17 2012-08-01 シャープ株式会社 車両用前照灯
JP5232815B2 (ja) 2010-02-10 2013-07-10 シャープ株式会社 車両用前照灯
US9816677B2 (en) 2010-10-29 2017-11-14 Sharp Kabushiki Kaisha Light emitting device, vehicle headlamp, illumination device, and laser element

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CH108619A (de) * 1924-02-25 1925-02-02 Lilienfeld Julius Edgar Prof D Automobilscheinwerfer.
CH310970A (de) * 1952-11-17 1955-11-15 Siemens Ag Albis Scheinwerfer.
JPS4427113Y1 (de) * 1967-07-05 1969-11-12
JPS5439151Y2 (de) * 1975-07-23 1979-11-20
HU178521B (en) * 1979-03-07 1982-05-28 Egyesuelt Izzolampa Electric reflector unit,in particular fullglass headlamp
CA1262245A (en) * 1984-04-10 1989-10-10 George J. English Lighting module for motor vehicle lighting system

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Publication number Publication date
JPS62254355A (ja) 1987-11-06
CA1270036C (en) 1990-06-05
CA1270036A (en) 1990-06-05
DE3786931T2 (de) 1994-02-24
DE3786931D1 (de) 1993-09-16
EP0232843A2 (de) 1987-08-19
EP0232843A3 (en) 1989-06-07
JPH0821370B2 (ja) 1996-03-04

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