EP0731314B1 - Headlamp for vehicles - Google Patents

Headlamp for vehicles Download PDF

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Publication number
EP0731314B1
EP0731314B1 EP95118822A EP95118822A EP0731314B1 EP 0731314 B1 EP0731314 B1 EP 0731314B1 EP 95118822 A EP95118822 A EP 95118822A EP 95118822 A EP95118822 A EP 95118822A EP 0731314 B1 EP0731314 B1 EP 0731314B1
Authority
EP
European Patent Office
Prior art keywords
light
light source
webs
opening
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.)
Expired - Lifetime
Application number
EP95118822A
Other languages
German (de)
French (fr)
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EP0731314A1 (en
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
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Filing date
Publication date
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Publication of EP0731314A1 publication Critical patent/EP0731314A1/en
Application granted granted Critical
Publication of EP0731314B1 publication Critical patent/EP0731314B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43Illuminating 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10Arrangement or contour of the emitted light
    • F21W2102/17Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/18Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • the invention relates to a headlight for vehicles according to the Genus of claim 1.
  • Such a headlamp is known from CH-A-487 366.
  • This Headlights are used to selectively generate a low beam and a high beam.
  • the headlamp has a light source, one Reflector and a shielding device assigned to the light source, through which part of the light emitted by the light source is shielded and an upper Patoscuro limit from which Headlight emerging low beam is generated.
  • the Shielding device points on both sides of the optical axis one running along the optical axis of the reflector opaque web, the webs over each other extend part of the circumference of the light source. Between There is an opening through the upper edges of the webs through which light emitted by the light source can pass through an upper region of the reflector to form the Low beam is reflected.
  • the Jroscuro limit of the Low beam is generated by the upper edges of the webs.
  • the shielding device has one in addition to the webs opaque cap located below the light source, which extends over part of the circumference of the light source. If the headlight is used to generate the low beam, so the cap is in a position in which its upper The edges of the caps run at the level of the webs, but the upper edges do not protrude. It is therefore between the cap and the webs there are no openings through which light could pass. Therefore, only the low beam comes out of the headlight with the Light-dark border off.
  • the cap is moved into a position in whose upper cap edges are arranged below the webs and thus there are openings between the cap and the webs are through which light can pass, that from a lower one Area of the reflector is reflected and one from the headlight emerging, with a distance above the Patoscuro limit of Low-beam light bundle forms an additional light beam.
  • the headlights are for the generation of Low beam between the cap and the webs no openings available, otherwise it will dazzle oncoming traffic would what is not allowed. Areas of the traffic situation the vehicle, which is at a distance above the light / dark limit of the Low beam are arranged, but are not or insufficiently lit, so that the driver there objects or obstacles, such as high attached traffic signs, not or difficult to see.
  • a headlight has a light source, a reflector and one of the light source associated shielding device through which part of the of the Light source emitted light is shielded and an upper one Light-dark boundary of the emerging from the headlight Low beam is generated.
  • the shielding device has one on each side of the optical axis along the optical axis On the axis of the reflector extending opaque web, wherein the webs each extend over part of the circumference of the Extend light source. Between the top edges of the webs is there is an opening through which from the light source emitted light can pass through from an upper area of the reflector is reflected to form the low beam.
  • the light-dark boundary of the low beam is determined by the upper one Edges of the webs created. Between the bottom edges of the webs is also an opening through which the light source emitted light can pass through a lower one Reflected area of the reflector as an additional light beam that is at a distance above the Corposcuro limit Low beam runs.
  • this headlight can only be used to generate the high beam be used because the additional light beam dazzles the Oncoming traffic caused.
  • the headlight according to the invention with the features according to claim 1 has the advantage that the additional light beam with low beam, an area in front of the vehicle at a distance above the light-dark boundary of the low beam and thus that there traffic situation is sufficiently illuminated without oncoming traffic is dazzled.
  • FIG. 1 shows a headlight for vehicles with a screening device in a vertical longitudinal section
  • Figure 2 shows the headlight in a cross section along line II-II in Figure 1 with the shielding device according to a first Embodiment
  • Figure 3 the light source and Shielding device of Figure 2 in a side view Arrow III in Figure 2
  • Figure 4 the headlight in one Cross section with the shielding device according to a second Embodiment
  • Figure 5 and the light source Shielding device of Figure 4 in a side view Arrow V in Figure 4
  • Figure 6 one in front of the headlight arranged measuring screen, which by the reflector at the Shielding device according to the first embodiment reflected light bundle is illuminated
  • Figure 7 the measuring screen when illuminated by the reflected by the reflector and light beam and figure passing through a cover plate 8 the measuring screen when illuminated by the reflector the shielding device according to the second embodiment reflected light beam.
  • a headlight for vehicles shown in FIG. 1 has a reflector 10 with an optical axis 11, the Reflector 10 has an upper area 12 and a lower area 13 has.
  • the reflector 10 has in its apex area an opening 14 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 in a lamp holder 16 be held, which in turn is attached to the reflector 10.
  • the Light source 15 protrudes with its glass bulb 18 in which Luminous body 20 is arranged, either a filament or one that forms during operation of the light source 15 Arc is in the reflector 10.
  • the shape of the The reflector 10 is determined such that the light source 15 emitted light is reflected in a certain way.
  • the Cover 24 In the light exit direction 22 after the reflector 10 is one Translucent cover plate 24 arranged through which Light exit opening of the headlight is covered.
  • the Cover 24 can be smooth, so that the Reflector 10 reflected light when passing through the Cover plate 24 is not affected.
  • the Cover 24 also optical elements 25 in the form of lenses and / or have prisms through which the reflector 10 reflected light is influenced when passing through, that is is is distracted and / or scattered.
  • a shielding device 26 is assigned to the light source 15, through which a part of the luminous body 20 of the light source 15 emitted light is shielded so that it does not affect the Reflector 10 can hit.
  • the shielding device 26 is shown in FIGS Figures 2 and 3 according to a first embodiment shown.
  • the shielding device 26 faces laterally next to the glass bulb 18 of the light source 15 on both sides of the optical axis 11 each one along the optical Axis 11 extending web 28 and 29.
  • the webs are 28, 29 opaque and in the direction of the optical axis 11 considered are arranged in the region of the luminous element 20.
  • the Web 28,29 are designed as a separate component and outside the glass bulb 18 of the light source 15.
  • the bridges 28, 29 can be attached to the lamp holder 16 and can also be integrally formed with the lamp holder 16. alternative the webs 28, 29 can also be attached to the reflector 10, for example in the apex area or also in the Light exit direction 22 pointing front edge.
  • 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 on. Between the upper edges 31 and 32 of the webs 28, 29 an opening 36 remains free, through which the filament 20 emitted light can pass through from the top 12 of the reflector 10 is reflected and from the headlight emerges and forms a low beam.
  • the Low beam has an upper light-dark limit that is generated by the upper edges 31, 32 of the webs 28, 29. For example, it is seen in the direction of light exit 22 left web 28 with its upper edge 31 approximately at the level of arranged optical axis 11 and the right web 29 is with its upper edge 32 below the optical axis 11 arranged.
  • the upper edge 32 of the right web 29 is preferably based on an optical axis 11 placed horizontal line 37 at an angle ⁇ of about 15 ° arranged lower.
  • Below the Glass bulb 18 of the light source 15 is another part of the Shielding device 26 an opaque cap 40 arranged, which partially covers the opening 38.
  • the cap 40 extends over part of the circumference of the opening 38 and has the lower edges 33 and 34 of the webs 28, 29 adjacent upper edges 42 and 43. Between the top edges 42 and 43 the cap 40 and the lower edges 33 and 34 of the webs 28, 29 a gap-like opening 45 and 46 remains through which light emitted by the luminous element 20 can pass through is reflected from the lower region 13 of the reflector 10 and forms an additional light beam.
  • the width of the openings 45 and 46 is along its length along the optical Axis 11 approximately constant.
  • the width of the webs 28, 29, that is whose extension over the circumference of the glass bulb 18 Light source 15 is also over its longitudinal extent approximately constant along the optical axis 11.
  • the extension of the openings 45, 46 over the circumference of the light source 15 with respect to their longitudinal extent along the optical axis 11 lower.
  • the cap 40 is a separate component outside the Glass bulb 18 of the light source 15 is formed and can be like that Web 28,29 be connected to the lamp support 16, with this be formed in one piece or in another way on the reflector 10 be attached.
  • the webs 28, 29 and the cap 40 can also be formed in one piece.
  • a measuring screen 50 is shown in FIGS Distance in front of the headlight perpendicular to the optical axis 11 is arranged and the projection of one in front of the headlight arranged lane represents.
  • Figure 6 there are areas of the measuring screen 50 marked by the reflector 10 reflected light beams are illuminated, the Cover 24 is removed.
  • the area labeled 52 of the measuring screen 50 is by the upper area 12 of the Reflector 10 illuminated low beam reflected.
  • the Area 52 is up through through the top edges 31 and 32 of the bridges 28, 29 generated light-dark boundary 54, the Cranoscuro boundary to the left of the vertical median plane VV of the measuring screen 50 has a horizontally arranged section 54a has, which is generated by the edge 31 of the web 28, and to the right of the vertical median plane VV to the right edge of the Measuring screen 50 rising portion 54b through the Edge 32 of the web 29 is generated.
  • the rising section 54b the Corposcuro limit is with respect to the horizontal section 54a inclined upwards by the angle .alpha Intersection HV of the vertical center plane VV and the horizontal center plane HH of the measuring screen 50.
  • the angle ⁇ , below which the section 54b of the Corposcuro limit 54 rises is equal to the angle ⁇ at which the upper edge 32 of the web 29 inclined downward with respect to the horizontal line 37 is arranged.
  • an area 56 that is not illuminated and the height of which the width of the webs 28, 29 is determined, that is, how far the webs 28, 29 extend over the circumference of the light source 15.
  • areas 58 and 59 again through the through the openings 45 and 46 between the webs 28, 29 and the cap 40 passing through and from the lower region 13 of the reflector 10 reflected additional light beams be illuminated.
  • the area 58 is at a distance above it of the horizontal portion 54a of the light-dark boundary and area 59 is spaced above the inclined Section 54b of the light-dark boundary arranged.
  • Areas 58, 59 that is, their extension in the vertical Direction takes along from the vertical median plane VV increasing distance from this too.
  • areas 58.59 is again an area 60 that is not illuminated because the Light that would illuminate this area 60 through the Cap 40 is shielded.
  • the measuring screen 50 is illuminated by the bundle of light emerging from the headlight with a superior one Cover disc 24 shown.
  • the cover plate 24 is included provided optical elements through which a scattering of the passing light is caused in the horizontal direction.
  • On the measuring screen 50 is that of the upper area 12 of the Reflector 10 illuminated low beam reflected Area labeled 52 'and the Sprintoscuro limit as in Figure 6 labeled 54a, b.
  • the by the lower area 13 of the Reflector 10 reflected additional light beams illuminated Areas are labeled 58 'and 59' and by the effect the optical elements of the cover plate 24 in horizontal Direction widened so that they partially opposed each other overlap.
  • Beams of light are located in the areas 58 ', 59' Objects visible while moving between areas 58 ', 59' and the Corposcuro boundary 54a, b do not lie illuminated area 56 'a dazzling oncoming Road users are avoided.
  • the above-described embodiment of the shielding device 26 is for the use of the headlight in right-hand traffic intended.
  • For use with left-hand traffic are corresponding to arrange the webs 28, 29 upside down, that is to say in Light exit direction 22 seen right web 29 is like this arranged that its upper edge 32 approximately at the level of optical axis 11 is arranged and the left web 28 is so arranged that its upper edge 33 related to one by the optical axis 11 line at an angle ⁇ of about 15 ° is arranged lower.
  • the shielding device 126 is shown in FIGS shown a second embodiment.
  • the light source 115 is on translucent envelope piston 170 assigned to the in the Glass bulb 118 of the light source 115 projecting from the reflector Distance surrounds.
  • the envelope piston 170 forms an envelope for the Light source 115 and is preferably made of glass, for example tempered glass.
  • the envelope 170 is, for example, on Lamp holder 116 held.
  • the bridges 128.129 each extend over part of the circumference of the Envelope piston 170 and these have upper edges 131, 132 and lower edges 133, 134.
  • the cap 140 can be a separate component within or be arranged outside the envelope piston 170, or, as in the Figures 4 and 5 shown as one on the envelope piston 170th applied opaque coating.
  • the upper edges 131, 132 of the webs 128, 129 are arranged as in the first embodiment.
  • the lower edges 133, 134 and / or the upper edges 142, 143 of the Cap 140 are arranged so that the width of the gap-like Openings 145, 146, that is, their extent over the circumference of the envelope bulb 170 or the circumference of the light source 115 its longitudinal extent along the optical axis 11 is changeable.
  • the width of the openings 145, 146 is included with respect to their longitudinal extent along the optical axis 11 lower and chosen so that the lamp 20 emitted light passing through it, the light at the bottom Area 13 of the reflector 10 is reflected and that additional light beams form on the measuring screen 50 as in FIG 8, areas 158 and 159 at a distance above the Chiaroscuro border 154 illuminated.
  • the height of the areas 158,159 is approximately constant over its horizontal extent.
  • the measuring screen 50 is illuminated by the reflected from the upper region 12 of the reflector 10 Low beam and that from the lower region 13 of the reflector 10 reflected additional light beams shown, the Cover 24 is removed.
  • the low beam is the area 152 on the measuring screen 50 is illuminated, the upward is limited by the light-dark boundary 154a, b.
  • the from additional light beam illuminated area 158 extends at a distance above the horizontal section 154a Light-dark boundary approximately parallel to this and the area 159 extends at a distance above the inclined section 154b of the Corposcuro boundary roughly parallel to this. Between the The light-dark boundary 154a, b and the areas 158, 159 is not illuminated area 156 arranged.
  • variable width of the openings 145, 146 are also the Imaging properties of the lower region 13 of the reflector 10 to be taken into account so that the reflected by this additional light beams on the measuring screen 50 the areas 158,159 illuminated with approximately constant height.
  • cover plate 24 is then like the first Embodiment the additional light beam horizontally scattered.
  • Shielding device 26 or 126 can also be omitted if correspondingly, the lower region 13 of the reflector 10 in its Shape is determined so that this between the webs 28,29 or 128,129 downward light as a horizontally scattered light beam with a low height is reflected and the areas 58, 59 described above or 158, 159 of the measuring screen 50 is illuminated.

Description

Die Erfindung geht aus von einem Scheinwerfer für Fahrzeuge nach der Gattung des Anspruchs 1.The invention relates to a headlight for vehicles according to the Genus of claim 1.

Ein solcher Scheinwerfer ist durch die CH-A-487 366 bekannt. Dieser Scheinwerfer dient zur wahlweisen Erzeugung eines Abblendlichts und eines Fernlichts. Der Scheinwerfer weist eine Lichtquelle auf, einen Reflektor und eine der Lichtquelle zugeordnete Abschirmvorrichtung, durch die ein Teil des von der Lichtquelle ausgesandten Lichts abgeschirmt wird und eine obere Helldunkelgrenze des aus dem Scheinwerfer austretenden Abblendlichtbündels erzeugt wird. Die Abschirmvorrichtung weist beiderseits der optischen Achse jeweils einen entlang der optischen Achse des Reflektors verlaufenden lichtundurchlässigen Steg auf, wobei die Stege sich jeweils über einen Teil des Umfangs der Lichtquelle erstrecken. Zwischen den oberen Kanten der Stege ist eine Öffnung vorhanden ist, durch die von der Lichtquelle ausgesandtes Licht hindurchtreten kann, das von einem oberen Bereich des Reflektors zur Bildung des Abblendlichtbündels reflektiert wird. Die Helldunkelgrenze des Abblendlichtbündels wird durch die oberen Kanten der Stege erzeugt. Die Abschirmvorrichtung weist zusätzlich zu den Stegen eine unterhalb der Lichtquelle angeordnete lichtundurchlässige Kappe auf, die sich über einen Teil des Umfangs der Lichtquelle erstreckt. Wenn der Scheinwerfer zur Erzeugung des Abblendlichts genutzt wird, so befindet sich die Kappe in einer Stellung, in der deren obere Kappenränder in der Höhe der Stege verlaufen, deren Oberkanten aber nicht überragen. Es sind somit zwischen der Kappe und den Stegen keine Öffnungen vorhanden, durch die Licht hindurchtreten könnte. Aus dem Scheinwerfer tritt daher nur das Abblendlichtbündel mit der Helldunkelgrenze aus. Wenn der Scheinwerfer zur Erzeugung des Fernlichts genutzt wird, so wird die Kappe in eine Stellung bewegt, in der deren obere Kappenränder unterhalb der Stege angeordnet sind und somit Öffnungen zwischen der Kappe und den Stegen vorhanden sind, durch die Licht hindurchtreten kann, das von einem unteren Bereich des Reflektors reflektiert wird und ein aus dem Scheinwerfer austretendes, mit Abstand oberhalb der Helldunkelgrenze des Abblendlichtbündels verlaufendes zusätzliches Lichtbündel bildet. Bei diesem bekannten Scheinwerfer sind für die Erzeugung des Abblendlichts zwischen der Kappe und den Stegen keine Öffnungen vorhanden, da ansonsten eine Blendung des Gegenverkehrs verursacht würde, was nicht zulässig ist. Bereiche der Verkehrssituation vor dem Fahrzeug, die mit Abstand oberhalb der Helldunkelgrenze des Abblendlichtbündels angeordnet sind, werden dabei jedoch nicht oder nur unzureichend beleuchtet, so daß der Fahrzeuglenker dort befindliche Gegenstände oder Hindernisse, wie beispielsweise hoch angebrachte Verkehrsschilder, nicht oder nur schwer erkennen kann.Such a headlamp is known from CH-A-487 366. This Headlights are used to selectively generate a low beam and a high beam. The headlamp has a light source, one Reflector and a shielding device assigned to the light source, through which part of the light emitted by the light source is shielded and an upper chiaroscuro limit from which Headlight emerging low beam is generated. The Shielding device points on both sides of the optical axis one running along the optical axis of the reflector opaque web, the webs over each other extend part of the circumference of the light source. Between There is an opening through the upper edges of the webs through which light emitted by the light source can pass through an upper region of the reflector to form the Low beam is reflected. The chiaroscuro limit of the Low beam is generated by the upper edges of the webs. The shielding device has one in addition to the webs opaque cap located below the light source, which extends over part of the circumference of the light source. If the headlight is used to generate the low beam, so the cap is in a position in which its upper The edges of the caps run at the level of the webs, but the upper edges do not protrude. It is therefore between the cap and the webs there are no openings through which light could pass. Therefore, only the low beam comes out of the headlight with the Light-dark border off. If the headlight to generate the High beam is used, the cap is moved into a position in whose upper cap edges are arranged below the webs and thus there are openings between the cap and the webs are through which light can pass, that from a lower one Area of the reflector is reflected and one from the headlight emerging, with a distance above the chiaroscuro limit of Low-beam light bundle forms an additional light beam. In this known headlights are for the generation of Low beam between the cap and the webs no openings available, otherwise it will dazzle oncoming traffic would what is not allowed. Areas of the traffic situation the vehicle, which is at a distance above the light / dark limit of the Low beam are arranged, but are not or insufficiently lit, so that the driver there objects or obstacles, such as high attached traffic signs, not or difficult to see.

Durch die DE-B-11 97 825 ist außerdem ein Scheinwerfer bekannt, der eine Lichtquelle aufweist, einen Reflektor und eine der Lichtquelle zugeordnete Abschirmvorrichtung, durch die ein Teil des von der Lichtquelle ausgesandten Lichts abgeschirmt wird und eine obere Helldunkelgrenze des aus dem Scheinwerfer austretenden Abblendlichtbündels erzeugt wird. Die Abschirmvorrichtung weist beiderseits der optischen Achse jeweils einen entlang der optischen Achse des Reflektors verlaufenden lichtundurchlässigen Steg auf, wobei die Stege sich jeweils über einen Teil des Umfangs der Lichtquelle erstrecken. Zwischen den oberen Kanten der Stege ist eine Öffnung vorhanden ist, durch die von der Lichtquelle ausgesandtes Licht hindurchtreten kann, das von einem oberen Bereich des Reflektors zur Bildung des Abblendlichtbündels reflektiert wird. Die Helldunkelgrenze des Abblendlichtbündels wird durch die oberen Kanten der Stege erzeugt. Zwischen den unteren Kanten der Stege ist ebenfalls eine Öffnung vorhanden, durch die von der Lichtquelle ausgesandtes Licht hindurchtreten kann, das durch einen unteren Bereich des Reflektors als ein zusätzliches Lichtbündel reflektiert wird, das mit Abstand oberhalb der Helldunkelgrenze des Abblendlichtbündels verläuft. Bei dieser Ausbildung des Scheinwerfers kann dieser aber-nur für die Erzeugung des Fernlichts genutzt werden, da das zusätzliche Lichtbündel eine Blendung des Gegenverkehrs verursacht.From DE-B-11 97 825 a headlight is also known has a light source, a reflector and one of the light source associated shielding device through which part of the of the Light source emitted light is shielded and an upper one Light-dark boundary of the emerging from the headlight Low beam is generated. The shielding device has one on each side of the optical axis along the optical axis On the axis of the reflector extending opaque web, wherein the webs each extend over part of the circumference of the Extend light source. Between the top edges of the webs is there is an opening through which from the light source emitted light can pass through from an upper area of the reflector is reflected to form the low beam. The light-dark boundary of the low beam is determined by the upper one Edges of the webs created. Between the bottom edges of the webs is also an opening through which the light source emitted light can pass through a lower one Reflected area of the reflector as an additional light beam that is at a distance above the chiaroscuro limit Low beam runs. In this training of However, this headlight can only be used to generate the high beam be used because the additional light beam dazzles the Oncoming traffic caused.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Scheinwerfer mit den Merkmalen gemäß Anspruch 1 hat demgegenüber den Vorteil, daß durch das zusätzliche Lichtbündel bei Abblendlicht ein Bereich vor dem Fahrzeug mit Abstand oberhalb der Helldunkelgrenze des Abblendlichtbündels und somit die dort befindliche Verkehrssituation ausreichend beleuchtet wird, ohne daß eine Blendung des Gegenverkehrs auftritt. The headlight according to the invention with the features according to claim 1 has the advantage that the additional light beam with low beam, an area in front of the vehicle at a distance above the light-dark boundary of the low beam and thus that there traffic situation is sufficiently illuminated without oncoming traffic is dazzled.

In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung angegeben.Advantageous embodiments are in the dependent claims and developments of the invention.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen Scheinwerfer für Fahrzeuge mit einer Abschirmvorrichtung in einem vertikalen Längsschnitt, Figur 2 den Scheinwerfer in einem Querschnitt entlang Linie II-II in Figur 1 mit der Abschirmvorrichtung gemäß einem ersten Ausführungsbeispiel, Figur 3 die Lichtquelle und die Abschirmvorrichtung von Figur 2 in einer Seitenansicht gemäß Pfeil III in Figur 2, Figur 4 den Scheinwerfer in einem Querschnitt mit der Abschirmvorrichtung gemäß einem zweiten Ausführungsbeispiel, Figur 5 die Lichtquelle und die Abschirmvorrichtung von Figur 4 in einer Seitenansicht gemäß Pfeil V in Figur 4, Figur 6 einen vor dem Scheinwerfer angeordneten Meßschirm, der durch die vom Reflektor bei der Abschirmvorrichtung gemäß dem ersten Ausführungsbeispiel reflektierten Lichtbündel beleuchtet wird, Figur 7 den Meßschirm bei der Beleuchtung durch die vom Reflektor reflektierten und durch eine Abdeckscheibe hindurchgetretene Lichtbündel und Figur 8 den Meßschirm bei der Beleuchtung durch die vom Reflektor bei der Abschirmvorrichtung gemäß dem zweiten Ausführungsbeispiel reflektierten Lichtbündel.Two embodiments of the invention are in the drawing shown and in the following description explained. FIG. 1 shows a headlight for vehicles with a screening device in a vertical longitudinal section, Figure 2 shows the headlight in a cross section along line II-II in Figure 1 with the shielding device according to a first Embodiment, Figure 3, the light source and Shielding device of Figure 2 in a side view Arrow III in Figure 2, Figure 4 the headlight in one Cross section with the shielding device according to a second Embodiment, Figure 5 and the light source Shielding device of Figure 4 in a side view Arrow V in Figure 4, Figure 6 one in front of the headlight arranged measuring screen, which by the reflector at the Shielding device according to the first embodiment reflected light bundle is illuminated, Figure 7 the measuring screen when illuminated by the reflected by the reflector and light beam and figure passing through a cover plate 8 the measuring screen when illuminated by the reflector the shielding device according to the second embodiment reflected light beam.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Ein in Figur 1 dargestellter Scheinwerfer für Fahrzeuge weist einen Reflektor 10 mit einer optischen Achse 11 auf, wobei der Reflektor 10 einen oberen Bereich 12 und einen unteren Bereich 13 aufweist. Der Reflektor 10 weist in seinem Scheitelbereich eine Öffnung 14 auf, in die eine Lichtquelle 15 eingesetzt ist. Die Lichtquelle 15 kann eine Glühlampe oder eine Gasentladungslampe sein und kann in einem Lampenträger 16 gehalten sein, der wiederum am Reflektor 10 befestigt ist. Die Lichtquelle 15 ragt mit ihrem Glaskolben 18, in dem deren Leuchtkörper 20 angeordnet ist, der entweder eine Glühwendel oder ein sich beim Betrieb der Lichtquelle 15 ausbildender Lichtbogen ist, in den Reflektor 10 hinein. Die Form des Reflektors 10 ist so bestimmt, daß von der Lichtquelle 15 ausgesandtes Licht in einer bestimmten Weise reflektiert wird. In Lichtaustrittsrichtung 22 nach dem Reflektor 10 ist eine lichtdurchlässige Abdeckscheibe 24 angeordnet, durch die die Lichtaustrittsöffnung des Scheinwerfers abgedeckt ist. Die Abdeckscheibe 24 kann glatt ausgebildet sein, so daß das vom Reflektor 10 reflektierte Licht beim Druchtritt durch die Abdeckscheibe 24 nicht beeinflußt wird. Alternativ kann die Abdeckscheibe 24 auch optische Elemente 25 in Form von Linsen und/oder Prismen aufweisen, durch die das vom Reflektor 10 reflektierte Licht beim Durchtritt beeinflußt, das heißt abgelenkt und/oder gestreut wird.A headlight for vehicles shown in FIG. 1 has a reflector 10 with an optical axis 11, the Reflector 10 has an upper area 12 and a lower area 13 has. The reflector 10 has in its apex area an opening 14 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 in a lamp holder 16 be held, which in turn is attached to the reflector 10. The Light source 15 protrudes with its glass bulb 18 in which Luminous body 20 is arranged, either a filament or one that forms during operation of the light source 15 Arc is in the reflector 10. The shape of the The reflector 10 is determined such that the light source 15 emitted light is reflected in a certain way. In the light exit direction 22 after the reflector 10 is one Translucent cover plate 24 arranged through which Light exit opening of the headlight is covered. The Cover 24 can be smooth, so that the Reflector 10 reflected light when passing through the Cover plate 24 is not affected. Alternatively, the Cover 24 also optical elements 25 in the form of lenses and / or have prisms through which the reflector 10 reflected light is influenced when passing through, that is is distracted and / or scattered.

Der Lichtquelle 15 ist eine Abschirmvorrichtung 26 zugeordnet, durch die ein Teil des vom Leuchtkörper 20 der Lichtquelle 15 ausgesandten Lichts abgeschirmt wird, so daß es nicht auf den Reflektor 10 treffen kann. Die Abschirmvorrichtung 26 ist in den Figuren 2 und 3 gemäß einem ersten Ausführungsbeispiel dargestellt. Die Abschirmvorrichtung 26 weist dabei seitlich neben dem Glaskolben 18 der Lichtquelle 15 beiderseits der optischen Achse 11 jeweils einen sich entlang der optischen Achse 11 erstreckenden Steg 28 und 29 auf. Die Stege 28,29 sind lichtundurchlässig und in Richtung der optischen Achse 11 betrachtet im Bereich des Leuchtkörpers 20 angeordnet sind. Die Stege 28,29 sind als separates Bauteil ausgeführt und außerhalb des Glaskolbens 18 der Lichtquelle 15 angeordnet. Die Stege 28,29 können am Lampenträger 16 befestigt sein und können auch einstückig mit dem Lampenträger 16 ausgebildet sein. Alternativ können die Stege 28,29 auch am Reflektor 10 befestigt sein, beispielsweise in dessen Scheitelbereich oder auch an dessen in Lichtaustrittsrichtung 22 weisendem Vorderrand. A shielding device 26 is assigned to the light source 15, through which a part of the luminous body 20 of the light source 15 emitted light is shielded so that it does not affect the Reflector 10 can hit. The shielding device 26 is shown in FIGS Figures 2 and 3 according to a first embodiment shown. The shielding device 26 faces laterally next to the glass bulb 18 of the light source 15 on both sides of the optical axis 11 each one along the optical Axis 11 extending web 28 and 29. The webs are 28, 29 opaque and in the direction of the optical axis 11 considered are arranged in the region of the luminous element 20. The Web 28,29 are designed as a separate component and outside the glass bulb 18 of the light source 15. The bridges 28, 29 can be attached to the lamp holder 16 and can also be integrally formed with the lamp holder 16. alternative the webs 28, 29 can also be attached to the reflector 10, for example in the apex area or also in the Light exit direction 22 pointing front edge.

Die Stege 28,29 erstrecken sich jeweils über einen Teil des Umfangs des Glaskolbens 18 der Lichtquelle 15 und weisen jeweils eine obere Kante 31 bzw. 32 und eine untere Kante 33 bzw. 34 auf. Zwischen den oberen Kanten 31 bzw. 32 der Stege 28,29 bleibt eine Öffnung 36 frei, durch die vom Leuchtkörper 20 ausgesandtes Licht hindurchtreten kann, das vom oberen Bereich 12 des Reflektors 10 reflektiert wird und aus dem Scheinwerfer austritt und ein Abblendlichtbündel bildet. Das Abblendlichtbündel weist eine obere Helldunkelgrenze auf, die durch die oberen Kanten 31,32 der Stege 28,29 erzeugt ist. Beispielsweise ist der in Lichtaustrittsrichtung 22 gesehen linke Steg 28 mit seiner oberen Kante 31 etwa auf Höhe der optischen Achse 11 angeordnet und der rechte Steg 29 ist mit seiner oberen Kante 32 unterhalb der optischen Achse 11 angeordnet. Die obere Kante 32 des rechten Stegs 29 ist vorzugsweise bezogen auf eine durch die optische Achse 11 gelegte horizontale Linie 37 unter einem Winkel α von etwa 15° tiefer angeordnet.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 on. Between the upper edges 31 and 32 of the webs 28, 29 an opening 36 remains free, through which the filament 20 emitted light can pass through from the top 12 of the reflector 10 is reflected and from the headlight emerges and forms a low beam. The Low beam has an upper light-dark limit that is generated by the upper edges 31, 32 of the webs 28, 29. For example, it is seen in the direction of light exit 22 left web 28 with its upper edge 31 approximately at the level of arranged optical axis 11 and the right web 29 is with its upper edge 32 below the optical axis 11 arranged. The upper edge 32 of the right web 29 is preferably based on an optical axis 11 placed horizontal line 37 at an angle α of about 15 ° arranged lower.

Zwischen den unteren Kanten 33 und 34 der Stege 28,29 bleibt ebenfalls eine Öffnung 38 frei, durch die vom Leuchtkörper 20 ausgesandtes Licht hindurchtreten kann. Unterhalb des Glaskolbens 18 der Lichtquelle 15 ist als weiterer Teil der Abschirmvorrichtung 26 eine lichtundurchlassige Kappe 40 angeordnet, die die Öffnung 38 teilweise verdeckt. Die Kappe 40 erstreckt sich über einen Teil des Umfangs der Öffnung 38 und weist den unteren Kanten 33 und 34 der Stege 28,29 benachbarte obere Kanten 42 und 43 auf. Zwischen den oberen Kanten 42 und 43 der Kappe 40 und den unteren Kanten 33 und 34 der Stege 28,29 verbleibt jeweils eine spaltartige Öffnung 45 und 46, durch die vom Leuchtkörper 20 ausgesandtes Licht hindurchtreten kann, das vom unteren Bereich 13 des Reflektors 10 reflektiert wird und ein zusätzliches Lichtbündel bildet. Die Breite der Öffnungen 45 und 46 ist über deren Längserstreckung entlang der optischen Achse 11 etwa konstant. Die Breite der Stege 28,29, das heißt deren Erstreckung über den Umfang des Glaskolbens 18 der Lichtquelle 15, ist ebenfalls über deren Längserstreckung entlang der optischen Achse 11 etwa konstant. Die Erstreckung der Öffnungen 45,46 über den Umfang der Lichtquelle 15 ist gegenüber ihrer Längserstreckung entlang der optischen Achse 11 geringer. Die Kappe 40 ist als separates Bauteil außerhalb des Glaskolbens 18 der Lichtquelle 15 ausgebildet und kann wie die Stege 28,29 mit dem Lampenträger 16 verbunden sein, mit diesem einstückig ausgebildet sein oder auf andere Weise am Reflektor 10 befestigt sein. Die Stege 28,29 und die Kappe 40 können auch einstückig ausgebildet sein.Remains between the lower edges 33 and 34 of the webs 28, 29 likewise an opening 38 through which the filament 20 emitted light can pass through. Below the Glass bulb 18 of the light source 15 is another part of the Shielding device 26 an opaque cap 40 arranged, which partially covers the opening 38. The cap 40 extends over part of the circumference of the opening 38 and has the lower edges 33 and 34 of the webs 28, 29 adjacent upper edges 42 and 43. Between the top edges 42 and 43 the cap 40 and the lower edges 33 and 34 of the webs 28, 29 a gap-like opening 45 and 46 remains through which light emitted by the luminous element 20 can pass through is reflected from the lower region 13 of the reflector 10 and forms an additional light beam. The width of the openings 45 and 46 is along its length along the optical Axis 11 approximately constant. The width of the webs 28, 29, that is whose extension over the circumference of the glass bulb 18 Light source 15 is also over its longitudinal extent approximately constant along the optical axis 11. The extension of the openings 45, 46 over the circumference of the light source 15 with respect to their longitudinal extent along the optical axis 11 lower. The cap 40 is a separate component outside the Glass bulb 18 of the light source 15 is formed and can be like that Web 28,29 be connected to the lamp support 16, with this be formed in one piece or in another way on the reflector 10 be attached. The webs 28, 29 and the cap 40 can also be formed in one piece.

In den Figuren 6 und 7 ist ein Meßschirm 50 dargestellt, der mit Abstand vor dem Scheinwerfer senkrecht zur optischen Achse 11 angeordnet ist und der die Projektion einer vor dem Scheinwerfer angeordneten Fahrbahn repräsentiert. In Figur 6 sind Bereiche des Meßschirms 50 markiert, die durch die vom Reflektor 10 reflektierten Lichtbündel beleuchtet werden, wobei die Abdeckscheibe 24 entfernt ist. Der mit 52 bezeichnete Bereich des Meßschirms 50 wird durch das vom oberen Bereich 12 des Reflektors 10 reflektierte Abblendlichtbündel beleuchtet. Der Bereich 52 ist nach oben durch die durch die oberen Kanten 31 und 32 der Stege 28,29 erzeugte Helldunkelgrenze 54 begrenzt, wobei die Helldunkelgrenze links der vertikalen Mittelebene VV des Meßschirms 50 einen horizontal angeordneten Abschnitt 54a aufweist, der durch die Kante 31 des Stegs 28 erzeugt ist, und rechts der vertikalen Mittelebene VV einen zum rechten Rand des Meßschirms 50 hin ansteigenden Abschnitt 54b, der durch die Kante 32 des Stegs 29 erzeugt ist. Der ansteigende Abschnitt 54b der Helldunkelgrenze ist bezüglich des horizontalen Abschnitts 54a um den Winkel α nach oben geneigt, bezogen auf den Schnittpunkt HV der vertikalen Mittelebene VV und der horizontalen Mittelebene HH des Meßschirms 50. Der Winkel α, unter dem der Abschnitt 54b der Helldunkelgrenze 54 ansteigt ist gleich dem Winkel α unter dem die obere Kante 32 des Stegs 29 bezüglich der horizontalen Linie 37 nach unten geneigt angeordnet ist.A measuring screen 50 is shown in FIGS Distance in front of the headlight perpendicular to the optical axis 11 is arranged and the projection of one in front of the headlight arranged lane represents. In Figure 6 there are areas of the measuring screen 50 marked by the reflector 10 reflected light beams are illuminated, the Cover 24 is removed. The area labeled 52 of the measuring screen 50 is by the upper area 12 of the Reflector 10 illuminated low beam reflected. The Area 52 is up through through the top edges 31 and 32 of the bridges 28, 29 generated light-dark boundary 54, the chiaroscuro boundary to the left of the vertical median plane VV of the measuring screen 50 has a horizontally arranged section 54a has, which is generated by the edge 31 of the web 28, and to the right of the vertical median plane VV to the right edge of the Measuring screen 50 rising portion 54b through the Edge 32 of the web 29 is generated. The rising section 54b the chiaroscuro limit is with respect to the horizontal section 54a inclined upwards by the angle .alpha Intersection HV of the vertical center plane VV and the horizontal center plane HH of the measuring screen 50. The angle α, below which the section 54b of the chiaroscuro limit 54 rises is equal to the angle α at which the upper edge 32 of the web 29 inclined downward with respect to the horizontal line 37 is arranged.

Direkt oberhalb der Helldunkelgrenze 54 ist auf dem Meßschirm 50 ein Bereich 56, der nicht beleuchtet wird und dessen Höhe durch die Breite der Stege 28,29 bestimmt ist, das heißt wie weit sich die Stege 28,29 über den Umfang der Lichtquelle 15 erstrecken. Oberhalb des Bereichs 56 sind wieder Bereiche 58 und 59, die durch das durch die Öffnungen 45 und 46 zwischen den Stegen 28,29 und der Kappe 40 hindurchtretende und vom unteren Bereich 13 des Reflektors 10 reflektierte zusätzliche Lichtbündel beleuchtet werden. Der Bereich 58 ist dabei mit Abstand oberhalb des horizontalen Abschnitts 54a der Helldunkelgrenze angeordnet und der Bereich 59 ist mit Abstand oberhalb des geneigten Abschnitts 54b der Helldunkelgrenze angeordnet. Die Höhe der Bereiche 58,59, das heißt deren Erstreckung in vertikaler Richtung nimmt ausgehend von der vertikalen Mittelebene VV mit zunehmendem Abstand von dieser zu. Oberhalb der Bereiche 58,59 ist wiederum ein Bereich 60, der nicht beleuchtet wird, da das Licht, welches diesen Bereich 60 beleuchten würde, durch die Kappe 40 abgeschirmt wird.Directly above the light-dark boundary 54 is on the measuring screen 50 an area 56 that is not illuminated and the height of which the width of the webs 28, 29 is determined, that is, how far the webs 28, 29 extend over the circumference of the light source 15. Above area 56 are areas 58 and 59 again through the through the openings 45 and 46 between the webs 28, 29 and the cap 40 passing through and from the lower region 13 of the reflector 10 reflected additional light beams be illuminated. The area 58 is at a distance above it of the horizontal portion 54a of the light-dark boundary and area 59 is spaced above the inclined Section 54b of the light-dark boundary arranged. The high of Areas 58, 59, that is, their extension in the vertical Direction takes along from the vertical median plane VV increasing distance from this too. Above areas 58.59 is again an area 60 that is not illuminated because the Light that would illuminate this area 60 through the Cap 40 is shielded.

In Figur 7 ist der Meßschirm 50 bei der Beleuchtung durch die aus dem Scheinwerfer austretenden Lichtbündel mit vorgesetzter Abdeckscheibe 24 dargestellt. Die Abdeckscheibe 24 ist dabei mit optischen Elementen versehen, durch die eine Streuung des hindurchtretenden Lichts in horizontaler Richtung bewirkt wird. Auf dem Meßschirm 50 ist der durch das vom oberen Bereich 12 des Reflektors 10 reflektierte Abblendlichtbündel beleuchtete Bereich mit 52' bezeichnet und die Helldunkelgrenze wie in Figur 6 mit 54a,b bezeichnet. Die durch das vom unteren Bereich 13 des Reflektors 10 reflektierte zusätzliche Lichtbündel beleuchteten Bereiche sind mit 58' und 59' bezeichnet und durch die Wirkung der optischen Elemente der Abdeckscheibe 24 in horizontaler Richtung verbreitert, so daß sie sich einander teilweise überlagern. Durch die Beleuchtung der Bereiche 58',59' durch das durch die Öffnungen 45 und 46 hindurchtretende zusätzliche Lichtbündel sind in den Bereichen 58',59' befindliche Gegenstände sichtbar, während durch den zwischen den Bereichen 58',59' und der Helldunkelgrenze 54a,b liegenden nicht beleuchteten Bereich 56' eine Blendung entgegenkommender Verkehrsteilnehmer vermieden ist.In Figure 7, the measuring screen 50 is illuminated by the bundle of light emerging from the headlight with a superior one Cover disc 24 shown. The cover plate 24 is included provided optical elements through which a scattering of the passing light is caused in the horizontal direction. On the measuring screen 50 is that of the upper area 12 of the Reflector 10 illuminated low beam reflected Area labeled 52 'and the chiaroscuro limit as in Figure 6 labeled 54a, b. The by the lower area 13 of the Reflector 10 reflected additional light beams illuminated Areas are labeled 58 'and 59' and by the effect the optical elements of the cover plate 24 in horizontal Direction widened so that they partially opposed each other overlap. By illuminating the areas 58 ', 59' through the additional passing through openings 45 and 46 Beams of light are located in the areas 58 ', 59' Objects visible while moving between areas 58 ', 59' and the chiaroscuro boundary 54a, b do not lie illuminated area 56 'a dazzling oncoming Road users are avoided.

Die vorstehend beschriebene Ausführung der Abschirmvorrichtung 26 ist für den Einsatz des Scheinwerfers bei Rechtsverkehr vorgesehen. Für den Einsatz bei Linksverkehr sind entsprechend die Stege 28,29 umgekehrt anzuordnen, das heißt der in Lichtaustrittsrichtung 22 gesehen rechte Steg 29 ist so angeordnet, daß dessen obere Kante 32 etwa auf Höhe der optischen Achse 11 angeordnet ist und der linke Steg 28 ist so angeordnet, daß dessen obere Kante 33 bezogen auf eine durch die optische Achse 11 gelegte Linie unter dem Winkel α von etwa 15° tiefer angeordnet ist.The above-described embodiment of the shielding device 26 is for the use of the headlight in right-hand traffic intended. For use with left-hand traffic are corresponding to arrange the webs 28, 29 upside down, that is to say in Light exit direction 22 seen right web 29 is like this arranged that its upper edge 32 approximately at the level of optical axis 11 is arranged and the left web 28 is so arranged that its upper edge 33 related to one by the optical axis 11 line at an angle α of about 15 ° is arranged lower.

In den Figuren 4 und 5 ist die Abschirmvorrichtung 126 gemäß einem zweiten Ausführungsbeispiel dargestellt. Dabei ist der grundsätzliche Aufbau des Scheinwerfers gegenüber den Figuren 1 bis 3 unverändert. Der Lichtquelle 115 ist ein lichtdurchlässiger Hüllkolben 170 zugeordnet, der den in den Reflektor ragenden Glaskolben 118 der Lichtquelle 115 mit Abstand umgibt. Der Hüllkolben 170 bildet eine Umhüllung für die Lichtquelle 115 und besteht vorzugsweise aus Glas, beispielsweise Hartglas. Der Hüllkoben 170 ist beispielsweise am Lampenträger 116 gehalten. Auf den Hüllkolben 170 sind als Teil der Abschirmvorrichtung 126 die beiden Stege 128,129 in Form einer lichtundurchlässigen Beschichtung aufgebracht. Die Stege 128,129 erstrecken sich jeweils über einen Teil des Umfangs des Hüllkolbens 170 und diese weisen obere Kanten bzw. Ränder 131,132 und untere Kanten 133,134 auf. Zwischen den oberen Kanten 131,132 der Stege 128,129 ist eine Öffnung 136 vorhanden, durch die vom Leuchtkörper 20 der Lichtquelle 115 ausgesandtes Licht hindurchtreten kann, das am oberen Bereich 12 des Reflektors 10 reflektiert wird und das Abblendlichtbündel bildet. Zwischen den unteren Kanten 133,134 der Stege 128,129 ist eine lichtundurchlässige Kappe 140 angeordnet, die obere Kanten bzw. Ränder 142,143 aufweist, die den unteren Kanten 133,134 der Stege 128,129 mit Abstand benachbart angeordnet sind. Die Kappe 140 kann als separates Bauteil innerhalb oder außerhalb des Hüllkolbens 170 angeordnet sein, oder, wie in den Figuren 4 und 5 dargestellt, als eine auf den Hüllkolben 170 aufgebrachte lichtundurchlässige Beschichtung.The shielding device 126 is shown in FIGS shown a second embodiment. Here is the basic structure of the headlight compared to FIGS. 1 to 3 unchanged. The light source 115 is on translucent envelope piston 170 assigned to the in the Glass bulb 118 of the light source 115 projecting from the reflector Distance surrounds. The envelope piston 170 forms an envelope for the Light source 115 and is preferably made of glass, for example tempered glass. The envelope 170 is, for example, on Lamp holder 116 held. On the envelope piston 170 are part the shielding device 126, the two webs 128, 129 in the form an opaque coating applied. The bridges 128.129 each extend over part of the circumference of the Envelope piston 170 and these have upper edges 131, 132 and lower edges 133, 134. Between the top There is an opening 136 at edges 131, 132 of the webs 128, 129, through that emitted by the luminous element 20 of the light source 115 Light can pass through the upper region 12 of the Reflector 10 is reflected and the low beam forms. Between the lower edges 133, 134 of the webs 128, 129 there is an opaque cap 140, the upper one Edges 142,143 has the lower edges 133, 134 of the webs 128, 129 are arranged adjacent to one another at a distance are. The cap 140 can be a separate component within or be arranged outside the envelope piston 170, or, as in the Figures 4 and 5 shown as one on the envelope piston 170th applied opaque coating.

Zwischen den oberen Kanten 142,143 der Kappe 140 und den unteren Kanten 133,134 der Stege 128,129 verbleibt jeweils eine spaltartige Öffnung 145,146. Die oberen Kanten 131,132 der Stege 128,129 sind wie beim ersten Ausführungsbeispiel angeordnet. Die unteren Kanten 133,134 und/oder die oberen Kanten 142,143 der Kappe 140 sind so angeordnet, daß die Breite der spaltartigen Öffnungen 145,146, das heißt deren Erstreckung über den Umfang des Hüllkolbens 170 bzw. den Umfang der Lichtquelle 115, über ihre Längserstreckung entlang der optischen Achse 11 veränderlich ist. Die Breite der Öffnungen 145,146 ist dabei gegenüber deren Längserstreckung entlang der optischen Achse 11 geringer und so so gewählt, daß das vom Leuchtkörper 20 ausgesandte, durch diese hindurchtretende Licht, das am unteren Bereich 13 des Reflektors 10 reflektiert wird und das zusätzliche Lichtbündel bildet auf dem Meßschirm 50 wie in Figur 8 dargestellt, Bereiche 158 und 159 mit Abstand oberhalb der Helldunkelgrenze 154 beleuchtet. Die Höhe der Bereiche 158,159 ist über deren horizontaler Erstreckung etwa konstant.Between the top edges 142, 143 of the cap 140 and the bottom Edges 133, 134 of webs 128, 129 each remain one gap-like opening 145, 146. The upper edges 131, 132 of the webs 128, 129 are arranged as in the first embodiment. The lower edges 133, 134 and / or the upper edges 142, 143 of the Cap 140 are arranged so that the width of the gap-like Openings 145, 146, that is, their extent over the circumference of the envelope bulb 170 or the circumference of the light source 115 its longitudinal extent along the optical axis 11 is changeable. The width of the openings 145, 146 is included with respect to their longitudinal extent along the optical axis 11 lower and chosen so that the lamp 20 emitted light passing through it, the light at the bottom Area 13 of the reflector 10 is reflected and that additional light beams form on the measuring screen 50 as in FIG 8, areas 158 and 159 at a distance above the Chiaroscuro border 154 illuminated. The height of the areas 158,159 is approximately constant over its horizontal extent.

In Figur 8 ist der Meßschirm 50 bei der Beleuchtung durch das vom oberen Bereich 12 des Reflektors 10 reflektierte Abblendlichtbündel und das vom unteren Bereich 13 des Reflektors 10 reflektierte zusätzliche Lichtbündel dargestellt, wobei die Abdeckscheibe 24 entfernt ist. Durch das Abblendlichtbündel wird der Bereich 152 auf dem Meßschirm 50 beleuchtet, der nach oben durch die Helldunkelgrenze 154a,b begrenzt ist. Der vom zusätzlichen Lichtbündel beleuchtete Bereich 158 erstreckt sich dabei mit Abstand oberhalb des horizontalen Abschnitts 154a der Helldunkelgrenze etwa parallel zu diesem und der Bereich 159 erstreckt sich mit Abstand oberhalb des geneigten Abschnitts 154b der Helldunkelgrenze etwa parallel zu diesem. Zwischen der Helldunkelgrenze 154a,b und den Bereichen 158,159 ist der nicht beleuchtete Bereich 156 angeordnet. Bei der Bestimmung der veränderlichen Breite der Öffnungen 145,146 sind auch die Abbildungseigenschaften des unteren Bereichs 13 des Reflektors 10 zu berücksichtigen, damit das von diesem reflektierte zusätzliche Lichtbündel auf dem Meßschirm 50 die Bereiche 158,159 mit etwa konstanter Höhe beleuchtet. Durch die optischen Elemente der Abdeckscheibe 24 wird dann wie beim ersten Ausführungsbeispiel das zusätzliche Lichtbündel horizontal gestreut.In Figure 8, the measuring screen 50 is illuminated by the reflected from the upper region 12 of the reflector 10 Low beam and that from the lower region 13 of the reflector 10 reflected additional light beams shown, the Cover 24 is removed. Through the low beam is the area 152 on the measuring screen 50 is illuminated, the upward is limited by the light-dark boundary 154a, b. The from additional light beam illuminated area 158 extends at a distance above the horizontal section 154a Light-dark boundary approximately parallel to this and the area 159 extends at a distance above the inclined section 154b of the chiaroscuro boundary roughly parallel to this. Between the The light-dark boundary 154a, b and the areas 158, 159 is not illuminated area 156 arranged. When determining the the variable width of the openings 145, 146 are also the Imaging properties of the lower region 13 of the reflector 10 to be taken into account so that the reflected by this additional light beams on the measuring screen 50 the areas 158,159 illuminated with approximately constant height. Through the optical Elements of the cover plate 24 is then like the first Embodiment the additional light beam horizontally scattered.

Die vorstehend beschriebene Kappe 40 bzw. 140 der Abschirmvorrichtung 26 bzw. 126 kann auch entfallen, wenn entsprechend der untere Bereich 13 des Reflektors 10 in seiner Form so bestimmt wird, daß durch diesen das zwischen den Stegen 28,29 bzw. 128,129 nach unten hindurchtretende Licht als ein horizontal gestreutes Lichtbündel mit einer geringen Höhe reflektiert wird und die vorstehend beschriebenen Bereiche 58,59 bzw. 158,159 des Meßschirms 50 beleuchtet.The cap 40 and 140 described above Shielding device 26 or 126 can also be omitted if correspondingly, the lower region 13 of the reflector 10 in its Shape is determined so that this between the webs 28,29 or 128,129 downward light as a horizontally scattered light beam with a low height is reflected and the areas 58, 59 described above or 158, 159 of the measuring screen 50 is illuminated.

Claims (9)

  1. A vehicle headlamp for generating a dipped beam, having a light source (15; 115), having a reflector (10) and having a screening device (26, 126), which is associated with the light source (15; 115) and by means of which part of the light emitted by the light source (15; 115) is screened and an upper light/dark boundary (54; 154) of the dipped beam of light emerging from the headlamp is generated, the screening device (26; 126) having on each side of the optical axis (11) an opaque web (28, 29; 128, 129) extending along the optical axis (11) of the reflector (10), the webs (28, 29; 128, 129) each extending over part of the periphery of the light source (15; 115), an opening (36) being present between the upper edges (31, 32; 131, 132) of said webs, it being possible for light emitted by the light source (15; 115) to pass through said opening, said light being reflected by an upper region (12) of the reflector (10) for the purpose of forming the dipped beam of light, the light/dark boundary (54; 154) of the dipped beam of light being generated by the upper edges (31, 32; 131, 132) of the webs (28, 29; 128, 129), the screening device (26; 126) having in addition to the webs (28, 29; 128, 129) an opaque cap (40; 140) which is arranged below the light source (15; 115) and extends over part of the periphery of the light source (15; 115), characterised in that the cap (40; 140) has upper edges (42, 43; 142, 143) between which and the lower edges (33, 34; 133, 134) of the webs (28, 29; 128, 129) there is in each case an opening (45, 46; 145, 146) through which light emitted by the light source (15; 115) can pass, said light being reflected by a lower region (13) of the reflector (10) and forming an additional beam of light extending at a spacing above the light/dark boundary (54; 154) of the dipped beam of light for the purpose of illuminating the traffic situation above the light/dark boundary (54; 154) without dazzling the oncoming traffic.
  2. A headlamp according to Claim 1, characterised in that the at least one opening (45, 46; 145, 146), through which light emitted by the light source (15; 115) passes for the purpose of forming the additional beam of light, is designed in the manner of a gap and its extent along the optical axis (11) is greater than its extent over the periphery of the light source (15; 115).
  3. A headlamp according to one of the preceding claims, characterised in that the extent of the at least one opening (45, 46) over the periphery of the light source (15) is approximately constant over the longitudinal extent of the at least one opening (45, 46) along the optical axis (11).
  4. A headlamp according to one of Claims 1 to 2, characterised in that the extent of the at least one opening (145, 146) over the periphery of the light source (115) may vary over the longitudinal extent of the at least one opening (145, 146) along the optical axis (11).
  5. A headlamp according to Claim 4, characterised in that the extent of the at least one opening (145, 146) over the periphery of the light source (115) may vary over the longitudinal extent of the at least one opening (145, 146) along the optical axis (11), such that the light passing through this forms the additional beam of light after reflection against the reflector (10), said beam of light having an approximately constant height over its extent in the horizontal direction.
  6. A headlamp according to one of the preceding claims, characterised in that a translucent covering (170) is associated with the light source (115) and has the webs (128, 129) applied thereto in the form of an opaque coating.
  7. A headlamp according to one of Claims 1 to 6, characterised in that a translucent covering (170) is associated with the light source (115) and has the cap (140) applied thereto in the form of an opaque coating.
  8. A headlamp according to one of Claims 1 to 5, characterised in that the webs (28, 29) are constructed as separate components arranged outside the light source (15).
  9. A headlamp according to one of Claims 1 to 6, characterised in that the cap (40) is constructed as a separate component arranged outside the light source (15).
EP95118822A 1995-03-10 1995-11-30 Headlamp for vehicles Expired - Lifetime EP0731314B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19508639 1995-03-10
DE19508639A DE19508639A1 (en) 1995-03-10 1995-03-10 Headlights for vehicles

Publications (2)

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

Family

ID=7756308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118822A Expired - Lifetime EP0731314B1 (en) 1995-03-10 1995-11-30 Headlamp for vehicles

Country Status (5)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT413753B (en) * 1999-08-16 2006-05-15 Zizala Lichtsysteme Gmbh VEHICLE HEADLIGHTS
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
KR20160024398A (en) * 2013-06-27 2016-03-04 코닌클리케 필립스 엔.브이. Lamp and headlighting arrangement for obtaining a color appearance in an automotive headlight

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1318683A (en) * 1962-01-08 1963-02-22 Improvements made to cut-beam headlamps, in particular low-beam headlamps for motor vehicles
DE1197825B (en) * 1963-05-07 1965-08-05 Bosch Gmbh Robert Headlights for motor vehicles
DE1597925A1 (en) * 1967-12-19 1970-10-01 Bosch Gmbh Robert Vehicle headlights
GB8824206D0 (en) 1988-10-15 1988-11-23 Carello Lighting Plc Motor vehicle headlamp

Also Published As

Publication number Publication date
DE19508639A1 (en) 1996-09-12
EP0731314A1 (en) 1996-09-11
JPH08249904A (en) 1996-09-27
US5690409A (en) 1997-11-25
DE59510242D1 (en) 2002-07-18
KR960034845A (en) 1996-10-24

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