EP0089289A1 - Scheinwerfer für Kraftfahrzeuge - Google Patents

Scheinwerfer für Kraftfahrzeuge Download PDF

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Publication number
EP0089289A1
EP0089289A1 EP83400521A EP83400521A EP0089289A1 EP 0089289 A1 EP0089289 A1 EP 0089289A1 EP 83400521 A EP83400521 A EP 83400521A EP 83400521 A EP83400521 A EP 83400521A EP 0089289 A1 EP0089289 A1 EP 0089289A1
Authority
EP
European Patent Office
Prior art keywords
reflector
projector
cover
light source
projector 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.)
Withdrawn
Application number
EP83400521A
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English (en)
French (fr)
Inventor
Armand Laribe
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0089289A1 publication Critical patent/EP0089289A1/de
Withdrawn legal-status Critical Current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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • 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
    • 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
    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F21S41/435—Hoods or cap-shaped
    • 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

Definitions

  • the invention relates to light projectors for vehicles, especially cars; of the kind which comprise a body provided with an ellipsoidal reflector and a light source arranged in the vicinity of the focal point of this reflector situated towards the bottom, this light source having its center or its axis raised by a distance from the optical axis of the reflector, this projector being in particular intended for crossing (code projector) and comprising a reflective hemispherical cup turning its concavity upwards and the center of which merges with the focal point of the reflector close to the light source, this projector comprising , at its front part, a cover intended to hide the upper part of the projector.
  • the document FR-A-2 135 432 shows, in particular in FIG. 3, a projector of this type.
  • the invention aims, above all, to make the light projectors of the kind defined above such that they meet the requirements formulated above.
  • a light projector for a vehicle in particular a motor vehicle, of the kind defined above, is characterized in that the rim of the cup is cut out so that the plunging light rays flush with this rim reach the reflector everywhere substantially at the same level, in a plane, in particular horizontal, located below a parallel plane passing through the optical axis of the projector, at a distance substantially equal to that of the center of the light source at optical axis of the reflector.
  • the rim of the cup is cut along an oblique plane inclined towards the rear of the projector, this plane intersecting the optical axis at the focus of the projector.
  • These passage means may comprise a channel with a section in the form of a circular segment provided at the upper part of the body, at least one opening being provided at the rear part of this body for the evacuation of air.
  • the projector may include a second annular reflecting surface of the ellipsoid type provided in front of the ellipsoid of revolution, and beam widening prisms placed in the vicinity of the front edges of the annular surface, the cover being provided substantially at or slightly in front of the focal point of the ellipsoid of revolution; the beam widening prisms are then located behind the front focus, while the cover is constituted by a projection or an awning attached in front of the body, so that this cover is at or in front of the front focus of the ellipsoid of revolution.
  • a light headlamp for a vehicle in particular a motor vehicle, of the city or code headlamp type, comprising a body provided with a reflector 1 formed by an ellipsoid of revolution around the axis A, which is also the optical axis.
  • This reflector 1 has the shape of a cap whose bottom is closed.
  • the focal point of this reflector, located towards the bottom, is designated by F.
  • a light source 2 is arranged in the vicinity of this focal point F, with its center or its axis 2a raised by a distance d relative to the optical axis A of the reflector. This distance d is advantageously equal to 0.5 mm or of the order of this value.
  • the light source 2 can be constituted by a lamp filament, in the form of a substantially cylindrical helix, the axis 2a of which is parallel to the optical axis A.
  • the projector of the code type has a reflective hemispherical cup 3, turning its concavity upwards and whose center merges with the focal point F of the ellipsoidal reflector.
  • This cup 3 in a known manner, aims to prevent the light rays, coming from the light source 2, from reaching the lower part of the reflector 1 and are not reflected in an upward direction, such reflected rays may cause the glare of drivers crossing the vehicle equipped with such a coded headlamp.
  • This projector comprises, at its front part, a cover 4 schematically shown intended to obscure the upper part of the projector; the lower horizontal edge of the cover 4 passes through the optical axis A.
  • the rim 6 of the cup 3 is cut so that the plunging light rays such as 7 (fig. 2) flush with this rim 6 of the cup reach the reflector 1 everywhere substantially at the same level in a horizontal plane (represented by its trace H in FIG. 2) situated at a distance equal to d (fig. 2) or substantially equal to d below the horizontal plane P passing through the optical axis A.
  • the plunging ray 7 is reflected along the practically horizontal ray 8, which will therefore not cause dazzling of the drivers crossing the vehicle equipped with the headlight.
  • the rim of the cup 3 is cut along an oblique plane Q inclined, as visible in FIG. 1, towards the rear of the projector, this plane Q intersecting the optical axis A at the focal point F.
  • the rear end 6a of the rim 6 is located below the axis A, while the front end 6b of this rim is located above the axis A.
  • any ellipsoidal reflector shows a weakening of the beam in the central zone, zone where the filament, generally spiral rectilinear along the optical axis of the reflector, emits a minimum of luminous flux.
  • a reflector 1 of revolution in thin sheet metal, a slight deformation consisting of compression along a horizontal diameter, that is to say according to the arrows F1, F2 of FIG. 3, of the front part of the re-reflector; this compression generates an ovalization of the front part of the reflector, with elongation of the vertical diameter, as illustrated diagrammatically by the arrows F3, F4 of FIG. 3.
  • the cross section of the light beam emitted by a reflector thus deformed is represented diagrammatically by S in FIG. 4 and has a large horizontal axis.
  • the deformation or the ovalization is advantageously obtained using two abutment members 9, 10, diametrically opposite along the horizontal (or vertical) axis provided on a bowl 11 supporting the reflector 1.
  • the distance 1 (fig.3) between the internal walls of these members is slightly less than the horizontal or vertical diameter of the front part of the reflector 1, before deformation; this difference makes it possible to establish the ovalization during the positioning of the reflector 1.
  • the members 9, 10 are advantageously constituted by projecting lugs provided on the bowl 11, capable of enclosing the stiffening edge 12 of the reflector 1, the latter being normally produced by tool of revolution.
  • the difference which exists, after fitting the reflector, between the vertical diameter (A) and the horizontal diameter (6) should not exceed 3% of the diameter of revolution.
  • a light projector for motor vehicles of the code or dipped beam type comprising a body provided with an ellipsoidal reflector 1 of revolution and a light source 2, schematically represented, arranged in the vicinity of the hearth F situated towards the bottom of this reflector; this projector has a second reflecting surface 13, annular, located in front of the reflector 1, and of ellipsoid type.
  • the sections of the surface 13 by planes passing through the optical axis A are formed by elliptical arcs admitting the point F as the first foyer; the arc 13a admits a second focus located at Fa (see Fig. 5), while the arc 13b admits a second focus Fb, symmetrical with Fa with respect to the axis A.
  • the second focal point of the ellipsoidal reflector of revolution 1, located towards the front, is located at point G.
  • Such a dipped headlight is equipped, in a known manner, with a cover 4a similar to the cover 4 in FIG. 1; such a cover 4a must be in front of the front hearth G (that is to say that the cover is on the side of the hearth G opposite to the other hearth F) or, at the limit, at this level focal point G.
  • the light beam emanating from the ellipsoid of revolution 1, or central ellipsoid forms an acute angle a (fig. 5) and admits the focal point G.
  • the annular reflecting surface 13 returns rays whose limits are materialized by the lines 14a for the section 13a and 14b for the section 13b. These lines pass respectively through the foci Fa and Fb.
  • the prisms are fixed to the same cover,. On the same plane; the cover having to be located beyond or at least at the focal point G, the position of the prisms 15 would then be that shown in dashes in FIG. 5.
  • Such an arrangement leads to an excessive spacing of the prisms, spacing incompatible with the dimensions of all reflectors. Such a spacing requires the provision of a much larger headlight body than necessary.
  • the cover which must always be located in front of or at the limit at the point G is then constituted by a projection or an awning 16 attached to the front of the body C; the front transverse face 4a of this projection or canopy is opaque and constitutes the cover itself.
  • this attached awning 16 can be made of more or less translucent material, possibly colored, so that it is visible from the side.
  • the transverse approximation of the prisms 15 can constitute an obstacle opposing easy access to a glass wall 17, shown in FIG. 6 (but not shown in FIG. 5), inside the body C, provided for the protection of the reflector and of the light source.
  • a sufficient opening 18 (fig. 6) is then made in the envelope of the headlight body, slightly in front of the glass wall 17 to allow easy access to this wall and facilitate cleaning.
  • a low beam headlamp for a motor vehicle whose body C extends forwardly beyond the glass wall 17 closing the headlight properly said.
  • the body C has, at its lower front end, a transverse opening 20 clearly visible in Figure 8.
  • a cover 4b having a function similar to that of the cover 4 of Figure 1 or 4a in figure 5.
  • the vacuum metallized reflecting surfaces provided on the reflector 1 are, in the event of contact, irrecoverable. This results in the obligation to house this reflector in a closed enclosure protecting it and making it inaccessible.
  • passage means 21 (FIGS. 7 and 9) making it possible to establish an air circulation around the projector itself, with discharge to the rear part of the body C by a or several openings 22 provided in the rear part of this body.
  • the passage means 21 comprise a channel 23 with a section in the form of a circular segment (FIG. 9) provided at the upper part of the body; a channel 24 also in section in the form of a circular segment is provided at the lower part of the body for the passage and evacuation of the water.
  • the front opening 20 is arranged to facilitate as much as possible the introduction into the headlight body C of a sufficient current of fresh air during the progression of the vehicle; this current first strikes the protective glass 17 of the closed enclosure and flows around the periphery of the ellipsoid arranged in a piece from the foundry.
  • This flow of fresh air shown diagrammatically by arrows in FIG. 7, is channeled and passes over the critical zones to be cooled.
  • the opening or openings 22 provided at the rear ensure the evacuation of this air.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP83400521A 1982-03-15 1983-03-14 Scheinwerfer für Kraftfahrzeuge Withdrawn EP0089289A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8204351A FR2523267A1 (fr) 1982-03-15 1982-03-15 Perfectionnements apportes aux projecteurs lumineux pour vehicules notamment automobiles
FR8204351 1982-03-15

Publications (1)

Publication Number Publication Date
EP0089289A1 true EP0089289A1 (de) 1983-09-21

Family

ID=9272015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400521A Withdrawn EP0089289A1 (de) 1982-03-15 1983-03-14 Scheinwerfer für Kraftfahrzeuge

Country Status (2)

Country Link
EP (1) EP0089289A1 (de)
FR (1) FR2523267A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149489A (en) * 1983-11-11 1985-06-12 Bosch Gmbh Robert Dipped light headlamp for motor vehicles
CN109519865A (zh) * 2019-01-03 2019-03-26 华域视觉科技(上海)有限公司 增加光型宽度的方法、辅助反射装置、led模组单元、车灯、汽车
US10749627B2 (en) 2009-12-07 2020-08-18 Huawei Technologies Co., Ltd. Method and apparatus for transmitting uplink control information

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB239301A (en) * 1924-06-11 1925-09-10 Jules Ayer Improvements in vehicle lamps
DE1182345B (de) * 1958-12-03 1964-11-26 Karl Nowak O H G Spezialfabrik Scheinwerferlampe fuer Kraftfahrzeuge
FR2362336A1 (fr) * 1976-08-18 1978-03-17 Bosch Gmbh Robert Phare pour vehicules automobiles
DE2650135A1 (de) * 1976-10-30 1978-05-11 Bosch Gmbh Robert Nebelscheinwerfer fuer kraftfahrzeuge
FR96684E (fr) * 1968-10-21 1978-06-19 Laribe Armand Phare mixte a brillance de croisement réduite.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB239301A (en) * 1924-06-11 1925-09-10 Jules Ayer Improvements in vehicle lamps
DE1182345B (de) * 1958-12-03 1964-11-26 Karl Nowak O H G Spezialfabrik Scheinwerferlampe fuer Kraftfahrzeuge
FR96684E (fr) * 1968-10-21 1978-06-19 Laribe Armand Phare mixte a brillance de croisement réduite.
FR2362336A1 (fr) * 1976-08-18 1978-03-17 Bosch Gmbh Robert Phare pour vehicules automobiles
DE2650135A1 (de) * 1976-10-30 1978-05-11 Bosch Gmbh Robert Nebelscheinwerfer fuer kraftfahrzeuge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149489A (en) * 1983-11-11 1985-06-12 Bosch Gmbh Robert Dipped light headlamp for motor vehicles
US10749627B2 (en) 2009-12-07 2020-08-18 Huawei Technologies Co., Ltd. Method and apparatus for transmitting uplink control information
CN109519865A (zh) * 2019-01-03 2019-03-26 华域视觉科技(上海)有限公司 增加光型宽度的方法、辅助反射装置、led模组单元、车灯、汽车
CN109519865B (zh) * 2019-01-03 2024-01-26 华域视觉科技(上海)有限公司 增加光型宽度的方法、装置、模组单元、车灯及汽车

Also Published As

Publication number Publication date
FR2523267B3 (de) 1985-03-29
FR2523267A1 (fr) 1983-09-16

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