EP0731314A1 - Phare pour véhicules - Google Patents

Phare pour véhicules Download PDF

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Publication number
EP0731314A1
EP0731314A1 EP95118822A EP95118822A EP0731314A1 EP 0731314 A1 EP0731314 A1 EP 0731314A1 EP 95118822 A EP95118822 A EP 95118822A EP 95118822 A EP95118822 A EP 95118822A EP 0731314 A1 EP0731314 A1 EP 0731314A1
Authority
EP
European Patent Office
Prior art keywords
light source
light
opening
webs
reflector
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
EP95118822A
Other languages
German (de)
English (en)
Other versions
EP0731314B1 (fr
Inventor
Doris Dipl.-Ing. Boebel
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 EP0731314A1 publication Critical patent/EP0731314A1/fr
Application granted granted Critical
Publication of EP0731314B1 publication Critical patent/EP0731314B1/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
    • F21S41/40—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
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • the invention relates to a headlamp for vehicles according to the preamble of claim 1.
  • Such a headlight is known from EP 0 365 193 A1.
  • This headlight has a light source, a reflector and a shielding device assigned to the light source. Part of the light emitted by the light source is shielded by the shielding device, so that it cannot strike the reflector. An upper Patoscuro limit of the light beam emerging from the headlight is generated by the shielding device. With this headlight, no or very little light is emitted above the light-dark limit, which prevents oncoming road users from being dazzled.
  • the headlamp according to the invention with the features according to claim 1 has the advantage that the webs causes the light beam emerging from the headlamp has an upper light-dark limit and above this there is an unilluminated area, so that dazzling oncoming vehicle drivers is avoided, but by additional light beams an area in front of the vehicle at a distance above the light / dark line and thus the traffic situation located there is adequately illuminated.
  • FIG. 1 shows a headlight for vehicles with a shielding device in a vertical longitudinal section
  • FIG. 2 shows the headlight in a cross section along line II-II in FIG. 1 with the shielding device according to a first exemplary embodiment
  • FIG. 1 shows a headlight for vehicles with a shielding device in a vertical longitudinal section
  • FIG. 2 shows the headlight in a cross section along line II-II in FIG. 1 with the shielding device according to a first exemplary embodiment
  • FIG. 1 shows a headlight for vehicles with a shielding device in a vertical longitudinal section
  • FIG. 2 shows the headlight in a cross section along line II-II in FIG. 1 with the shielding device according to a first exemplary embodiment
  • FIG 3 shows the light source and the Shielding device of Figure 2 in a side view according to arrow III in Figure 2
  • Figure 4 shows the headlight in a cross section with the shielding device according to a second embodiment
  • Figure 5 shows the light source and the shielding device of Figure 4 in a side view according to arrow V in Figure 4
  • Figure 6 a measuring screen arranged in front of the headlight, which is illuminated by the light bundles reflected by the reflector in the shielding device according to the first exemplary embodiment
  • FIG. 7 the measuring screen when illuminated by the light bundles reflected by the reflector and passed through a cover plate
  • FIG. 8 the measuring screen at the Illumination by the light beams reflected by the reflector in the shielding device according to the second exemplary embodiment.
  • a headlight for vehicles shown in FIG. 1 has a reflector 10 with an optical axis 11, the reflector 10 having an upper region 12 and a lower region 13.
  • the reflector 10 has an opening 14 in its apex region into which a light source 15 is inserted.
  • the light source 15 can be an incandescent lamp or a gas discharge lamp and can be held in a lamp holder 16, which in turn is attached to the reflector 10.
  • the light source 15 projects into the reflector 10 with its glass bulb 18, in which its luminous element 20 is arranged, which is either an incandescent filament or an arc that forms during operation of the light source 15.
  • the shape of the reflector 10 is determined such that the light source 15 emitted light is reflected in a certain way.
  • a translucent cover plate 24 is arranged, through which the light exit opening of the headlight is covered.
  • the cover plate 24 can be smooth, so that the light reflected by the reflector 10 is not influenced when it passes through the cover plate 24.
  • the cover plate 24 can also have optical elements 25 in the form of lenses and / or prisms, by means of which the light reflected by the reflector 10 is influenced when it passes through, that is to say deflected and / or scattered.
  • the light source 15 is assigned a shielding device 26, by which part of the light emitted by the luminous element 20 of the light source 14 is shielded, so that it cannot strike the reflector 10.
  • the shielding device 26 is shown in FIGS. 2 and 3 according to a first exemplary embodiment.
  • the shielding device 26 has on the side next to the glass bulb 18 of the light source 15 on both sides of the optical axis 11 in each case a web 28 and 29 extending along the optical axis 11.
  • the webs 28, 29 are opaque and, viewed in the direction of the optical axis 11, are arranged in the region of the luminous element 20.
  • the webs 28, 29 are designed as a separate component and are arranged outside the glass bulb 18 of the light source 15.
  • the webs 28, 29 can be fastened to the lamp holder 16 and can also be formed in one piece with the lamp holder 16. Alternatively, the webs 28, 29 can also be fastened to the reflector 10, for example in its apex region or also on its front edge pointing in the direction of light exit 22.
  • the webs 28, 29 each extend over part of the circumference of the glass bulb 18 of the light source 15 and each have an upper edge 31 or 32 and a lower edge 33 or 34. Between the upper edges 31 and 32 of the webs 28, 29, an opening 36 remains free, through which light emitted by the luminous element 20 can pass, which is reflected by the upper region 12 of the reflector 10 and emerges from the headlight and forms a low beam.
  • the low beam has an upper light-dark boundary, which is generated by the upper edges 31, 32 of the webs 28, 29.
  • the left web 28 seen in the light exit direction 22 is arranged with its upper edge 31 approximately at the level of the optical axis 11 and the right web 29 is arranged with its upper edge 32 below the optical axis 11.
  • the upper edge 32 of the right web 29 is preferably arranged at an angle ⁇ of approximately 15 ° lower with respect to a horizontal line 37 through the optical axis 11.
  • an opening 38 through which light emitted by the luminous element 20 can pass.
  • an opaque cap 40 is arranged as a further part of the shielding device 26, which partially covers the opening 38.
  • the cap 40 extends over part of the circumference of the opening 38 and has upper edges 42 and 43 adjacent to the lower edges 33 and 34 of the webs 28, 29.
  • Between the upper edges 42 and 43 of the cap 40 and the lower edges 33 and 34 of the webs 28, 29 In each case there remains a gap-like opening 45 and 46, through which light emitted by the luminous element 20 can pass, which is reflected by the lower region 13 of the reflector 10 and forms an additional light bundle.
  • the width of the openings 45 and 46 is approximately constant over their longitudinal extent along the optical axis 11.
  • the width of the webs 28, 29, that is to say their extension over the circumference of the glass bulb 18 of the light source 15, is likewise approximately constant over their longitudinal extension along the optical axis 11.
  • the extent of the openings 45, 46 over the circumference of the light source 15 is less than its longitudinal extent along the optical axis 11.
  • the cap 40 is designed as a separate component outside the glass bulb 18 of the light source 15 and, like the webs 28, 29, can be connected to the lamp holder 16, can be formed in one piece with it, or can be attached to the reflector 10 in some other way.
  • the webs 28, 29 and the cap 40 can also be formed in one piece.
  • FIGS. 6 and 7 show a measuring screen 50 which is arranged at a distance in front of the headlight perpendicular to the optical axis 11 and which represents the projection of a roadway arranged in front of the headlight.
  • areas of the measuring screen 50 are marked which are illuminated by the light bundles reflected by the reflector 10, the cover plate 24 being removed.
  • the area of the measuring screen 50, designated 52, is illuminated by the low beam reflected by the upper area 12 of the reflector 10.
  • the area 52 is bounded at the top by the light-dark boundary 54 generated by the upper edges 31 and 32 of the webs 28, 29, the light-dark boundary to the left of the vertical central plane VV of the measuring screen 50 has a horizontally arranged section 54a which is produced by the edge 31 of the web 28, and to the right of the vertical center plane VV a section 54b which rises towards the right edge of the measuring screen 50 and which is produced by the edge 32 of the web 29.
  • the rising section 54b of the light-dark boundary is inclined upward with respect to the horizontal section 54a by the angle ⁇ , with reference to the intersection HV of the vertical central plane VV and the horizontal central plane HH of the measuring screen 50.
  • the angle ⁇ at which the section 54b of the light-dark boundary 54 increases is equal to the angle ⁇ at which the upper edge 32 of the web 29 is arranged inclined downward with respect to the horizontal line 37.
  • an area 56 on the measuring screen 50 which is not illuminated and the height of which is determined by the width of the webs 28, 29, that is to say how far the webs 28, 29 extend over the circumference of the light source 15.
  • area 56 are again areas 58 and 59 which are illuminated by the additional light bundle which passes through the openings 45 and 46 between the webs 28, 29 and the cap 40 and is reflected by the lower area 13 of the reflector 10.
  • the area 58 is arranged at a distance above the horizontal section 54a of the light-dark boundary and the area 59 is arranged at a distance above the inclined section 54b of the light-dark boundary.
  • the height of the areas 58, 59 that is to say their extent in the vertical direction, increases with increasing distance from the vertical central plane VV. Above the areas 58, 59 there is again an area 60 which is not illuminated because the Light that would illuminate this area 60 is shielded by the cap 40.
  • the measuring screen 50 is shown when it is illuminated by the light bundles emerging from the headlight with the cover plate 24 in front.
  • the cover plate 24 is provided with optical elements, by means of which the light passing through is scattered in the horizontal direction.
  • the low beam region illuminated by the low beam reflected by the upper region 12 of the reflector 10 is denoted by 52 'and the light-dark boundary is denoted by 54a, b in FIG.
  • the areas illuminated by the additional light beam reflected by the lower area 13 of the reflector 10 are designated 58 'and 59' and broadened in the horizontal direction by the action of the optical elements of the cover plate 24, so that they partially overlap one another.
  • the design of the shielding device 26 described above is intended for use of the headlamp in right-hand traffic.
  • the webs 28, 29 are to be arranged in reverse, that is, the right web 29 seen in the light exit direction 22 is arranged such that its upper edge 32 is approximately at the level of the Optical axis 11 is arranged and the left web 28 is arranged such that its upper edge 33 is arranged at an angle ⁇ of approximately 15 ° lower with respect to a line through the optical axis 11.
  • FIGS. 4 and 5 show the shielding device 126 according to a second exemplary embodiment.
  • the basic structure of the headlight is unchanged compared to FIGS. 1 to 3.
  • a light-transmissive envelope bulb 170 is associated with the light source 115 and surrounds the glass bulb 118 of the light source 115 projecting into the reflector at a distance.
  • the envelope bulb 170 forms an envelope for the light source 115 and is preferably made of glass, for example hard glass.
  • the envelope 170 is held on the lamp carrier 116, for example.
  • the two webs 128, 129 in the form of an opaque coating are applied to the envelope piston 170 as part of the shielding device 126.
  • the webs 128, 129 each extend over part of the circumference of the envelope piston 170 and these have upper edges or edges 131, 132 and lower edges 133, 134. Between the upper edges 131, 132 of the webs 128, 129 there is an opening 136 through which light emitted by the luminous element 20 of the light source 115 can pass, which is reflected at the upper region 12 of the reflector 10 and forms the low beam.
  • an opaque cap 140 Arranged between the lower edges 133, 134 of the webs 128, 129 is an opaque cap 140, which has upper edges or edges 142, 143, which are spaced apart from the lower edges 133, 134 of the webs 128, 129.
  • the cap 140 can be arranged as a separate component inside or outside the envelope piston 170 or, as in FIGS Figures 4 and 5 shown as an opaque coating applied to the envelope piston 170.
  • a gap-like opening 145, 146 remains between the upper edges 142, 143 of the cap 140 and the lower edges 133, 134 of the webs 128, 129.
  • the upper edges 131, 132 of the webs 128, 129 are arranged as in the first exemplary embodiment.
  • the lower edges 133, 134 and / or the upper edges 142, 143 of the cap 140 are arranged such that the width of the gap-like openings 145, 146, that is to say their extent over the circumference of the envelope bulb 170 or the circumference of the light source 115, over their longitudinal extent along the optical Axis 11 is changeable.
  • the width of the openings 145, 146 is smaller than their longitudinal extent along the optical axis 11 and is chosen so that the light emitted by the luminous body 20, passing through it, which is reflected at the lower region 13 of the reflector 10 and forms the additional light beam on the Measuring screen 50 as shown in FIG. 8, areas 158 and 159 illuminated at a distance above the Cadoscuro limit 154.
  • the height of the areas 158, 159 is approximately constant over their horizontal extent.
  • FIG. 8 shows the measuring screen 50 when illuminated by the low beam reflected by the upper area 12 of the reflector 10 and the additional light beam reflected by the lower area 13 of the reflector 10, the cover plate 24 being removed.
  • the area 152 on the measuring screen 50 is illuminated by the low beam, which is limited at the top by the light-dark boundary 154a, b.
  • the area 158 illuminated by the additional light beam extends in this case at a distance above the horizontal section 154a of the light-dark boundary approximately parallel to this and the region 159 extends at a distance above the inclined section 154b of the light-dark boundary approximately parallel to this.
  • the non-illuminated area 160 is arranged between the light-dark boundary 154a, b and the areas 158, 159.
  • the imaging properties of the lower region 13 of the reflector 10 must also be taken into account, so that the additional light beam reflected by the latter on the measuring screen 50 illuminates the regions 158, 159 with an approximately constant height.
  • the additional light beam is then scattered horizontally by the optical elements of the cover plate 24, as in the first exemplary embodiment.
  • the cap 40 or 140 of the shielding device 26 or 126 described above can also be omitted if the shape of the lower region 13 of the reflector 10 is determined in such a way that through this the downward passage between the webs 28, 29 and 128, 129 Light is reflected as a horizontally scattered light bundle with a small height and illuminates the areas 58, 59 and 158, 159 of the measuring screen 50 described above.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP95118822A 1995-03-10 1995-11-30 Phare pour véhicules Expired - Lifetime EP0731314B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19508639A DE19508639A1 (de) 1995-03-10 1995-03-10 Scheinwerfer für Fahrzeuge
DE19508639 1995-03-10

Publications (2)

Publication Number Publication Date
EP0731314A1 true EP0731314A1 (fr) 1996-09-11
EP0731314B1 EP0731314B1 (fr) 2002-06-12

Family

ID=7756308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118822A Expired - Lifetime EP0731314B1 (fr) 1995-03-10 1995-11-30 Phare pour véhicules

Country Status (5)

Country Link
US (1) US5690409A (fr)
EP (1) EP0731314B1 (fr)
JP (1) JPH08249904A (fr)
KR (1) KR960034845A (fr)
DE (2) DE19508639A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT413753B (de) * 1999-08-16 2006-05-15 Zizala Lichtsysteme Gmbh Fahrzeugscheinwerfer
US8224695B2 (en) * 2006-03-31 2012-07-17 Google Inc. Monetizing service calls through advertising
US20070239533A1 (en) * 2006-03-31 2007-10-11 Susan Wojcicki Allocating and monetizing advertising space in offline media through online usage and pricing model
US9892906B2 (en) * 2013-06-27 2018-02-13 Koninklijke Philips N.V. Lamp and headlighting arrangement for obtaining a color appearance in an automotive headlight

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1197825B (de) * 1963-05-07 1965-08-05 Bosch Gmbh Robert Scheinwerfer fuer Kraftfahrzeuge
CH487366A (de) * 1967-12-19 1970-03-15 Bosch Gmbh Robert Fahrzeugscheinwerfer
EP0365193A2 (fr) 1988-10-15 1990-04-25 Carello Lighting Plc Projecteur pour véhicule automobile

Family Cites Families (1)

* 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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1197825B (de) * 1963-05-07 1965-08-05 Bosch Gmbh Robert Scheinwerfer fuer Kraftfahrzeuge
CH487366A (de) * 1967-12-19 1970-03-15 Bosch Gmbh Robert Fahrzeugscheinwerfer
EP0365193A2 (fr) 1988-10-15 1990-04-25 Carello Lighting Plc Projecteur pour véhicule automobile

Also Published As

Publication number Publication date
DE59510242D1 (de) 2002-07-18
JPH08249904A (ja) 1996-09-27
KR960034845A (ko) 1996-10-24
EP0731314B1 (fr) 2002-06-12
US5690409A (en) 1997-11-25
DE19508639A1 (de) 1996-09-12

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