DE102009032019A1 - Projection headlight for a motor vehicle - Google Patents

Abstract

The invention relates to a projection headlight for a motor vehicle, having a reflector, at least one light source arranged in the reflector, a projection lens arranged in front of the reflector and at least one diaphragm device (6) arranged between reflector and projection lens for shading part of the light emitted by the light source and by the reflector reflected light rays, the diaphragm device (6) comprising at least one elongate component which can be rotated about a longitudinal axis (A) and which longitudinal axis (A) is oriented transversely to the light emission direction of the projection headlight. The invention also relates to a headlight arrangement for a motor vehicle with at least two spaced projection headlights. According to the invention, the component (6) has at least two shading lines (12), which form a clear space (11) between them and the component (6) can be brought into such a position by rotating about its longitudinal axis (A) that the shading lines (12) run essentially vertically. This technical measure makes it possible to implement a marking or escape light in a structurally simple manner with only one component (6).

Description

The The invention relates to a projection headlight for a Motor vehicle, with a reflector, at least one in the reflector arranged light source, a front of the reflector arranged projection lens and at least one arranged between reflector and projection lens Aperture device for shading a part of the light source emitted and reflected by the reflector light rays, wherein the diaphragm device at least one about a longitudinal axis rotatable, elongate member comprises which longitudinal axis aligned transversely to the light emission direction of the projection headlight is. The invention further relates to a headlamp assembly for a motor vehicle with at least two spaced Projection headlights.

such Projection headlights are used for motor vehicles, to different, the respective driving situations or vehicle environments to realize adapted total light distributions. A total light distribution (History of horizontal and vertical light / dark boundaries) results This consists of a shading pattern, which is made up of the optically effective contours of the diaphragm device or the diaphragm devices of each headlight is formed. In addition, the Total light distribution still by a rotational position of the optical Axes of the headlamps around a horizontal and / or vertical axis to be influenced. Of course, these are suitable systems for recording the vehicle (ambient) data, for the corresponding further processing the recorded signals and the functionally appropriate control and movement of the headlight components provided.

in the According to the prior art, corresponding headlight systems are used, to produce total light distributions, which in some areas the lighting range have a conventional high beam, but designed so and via a control of the headlight components constantly be adapted so that other road users (eg oncoming, vehicles in front or to overtake) not dazzled become. Specifically, these total light distributions are shadowed Corridors in which the other road users constantly being held. Such a high beam is in the present application referred to as "masked long distance" (MDF) become.

In the WO 2008/037388 A2 For example, a corresponding method for controlling a headlamp assembly and such is described. The different shading pattern are hereby accomplished by aperture devices containing a plurality of flat components whose surface normal is approximately parallel to the emission direction of the headlights. The components are controlled separately (or suitable coupling elements are provided) and moved perpendicular to the emission direction.

Also the DE 10 2006 043 281 A1 describes a projection headlamp assembly, which serves to generate different total light distributions, in which other road users are not dazzled. In order to increase the flexibility in the generation of different total light distributions, it is provided in particular that the diaphragm device consists of a plurality of wave-shaped diaphragms which are arranged next to each other in a segment-shaped manner.

It However, situations may also occur where a driver assistance system basically "vice versa" has to work. This case applies, for example, when in the environment of the vehicle Objects are detected that pose a risk of collision for represent the vehicle. In such a case, a total light distribution must can be generated with such a light emission, the driver a direction of travel to reduce the risk of collision points (so-called flight light) or the driver at least through a corresponding light beam on the risk of collision or the Draws attention to the collision object (so-called marker light). Both escape light and marker light require a light beam, which is significantly narrower compared to dipped or main beam.

Of the Invention is based on the object, a projection headlight provide the said type, with a simple way Marking or escape light can be realized.

These The object is achieved with the characterizing features of claim 1. Advantageous designs or developments The invention can be taken from the respective subclaims.

The invention is therefore based on a projection headlamp for a motor vehicle, comprising a reflector, at least one light source arranged in the reflector, a projection lens arranged in front of the reflector, and at least one aperture device arranged between the reflector and the projection lens for shading part of the light emitted by the light source and the reflector Reflected light rays, wherein the diaphragm device comprises at least one rotatable about a longitudinal axis, elongated member, which longitudinal axis is aligned transversely to the light emission direction of the projection headlamp. According to the invention it is provided that the component has at least two Abschattungslinien which clear between them Form intermediate space and the component by rotation about its longitudinal axis in such a position bring bar is that the shading lines are substantially vertical. By this technical measure, the realization of a marker or escape light is possible in a structurally simple manner with only one component. The component of the diaphragm device thus only needs to be rotated to the optically effective position, in which the shading lines run vertically, so that the light beams of the projection headlight can pass through the clear gap. The required width of the light beam can be influenced by a suitable choice of the clear gap or the distance of the shading lines. By appropriate rotation of the headlights in the horizontal or vertical direction, possibly using existing devices or actuators of headlamp leveling and cornering light, the light beam of the marker or escape light can also be arbitrarily aligned.

According to one The first development of the concept of the invention provides that the shading lines are spaced such that a slit-shaped, clear space results. This allows a very narrow Marking or escape light, which is quite desirable. Conveniently, the Abschattungslinien formed by two aligned edges. This carries to sharply distinguish the light beam.

Around to color the illumination of the marker or escape light provides a further advantageous embodiment of the inventive concept, that the clear space is provided with a color filter.

It is extremely beneficial when depending on the rotational position of the component several light functions, in particular a dipped beam, a masked long distance beam or a marker or Let escape light be realized. This leads to a simplification and also to an acceleration of the control of the projection headlamp, because by just one turn one through a shading line pattern predefined basic lighting function can be selected. Any necessary "adjustment" can by an already mentioned rotation of the headlights around a horizontal or vertical axis take place.

It has proved to be useful if the Component is designed such that the change of a light function to another by a rotation of the component by about 90 ° or one several of them are done.

A Further advantageous embodiment of the invention provides that the component is approximately cylindrical, so that in cross section in about a circular appearance results in a first half cylinder and a second half cylinder, wherein at least every half cylinder a shading line pattern for the realization of a specific light function is assigned.

alternative can, however, in a most convenient way also be provided that the component at least two, approximately perpendicular to each other and protruding from the axis of rotation wing-like Parts, each wing-like part a shading pattern which, for the realization of a specific light function contributes. Such a construction of the component allows particularly elegant the realization of several lighting functions. For example can the component in an advantageous embodiment of the invention in cross-section four, approximately perpendicular to each other wings exhibit.

A Headlamp assembly for a motor vehicle with at least two spaced projection projectors according to the invention may be flexible in terms of producible different or common lighting functions even better when the clear space formed by the shading lines in the component of at least two projection headlamps respectively is arranged at different locations and / or different Has dimensions.

Further Advantages and embodiments of the invention are based on preferred Embodiments clear what with the help of the enclosed Figures to be explained in more detail. Mean

1 a principle longitudinal section through a headlight according to the invention,

2 3 is a schematic representation of a first exemplary embodiment of a diaphragm device (best embodiment) used in several views,

3 a schematic representation of a second embodiment of a diaphragm device used in several views and

4 a schematic diagram of a motor vehicle, which is equipped with a headlamp assembly having the headlights of the invention.

First, it will open 1 Referenced. Therein is a projection headlight 1 only shown in principle in longitudinal section, which forms a preferably designed as a rotation ellipsoid Re Flektor 2 , a light source arranged in its first focal point 3 and one seen in a radiation direction L in front of the light source 3 arranged projection lens 4 includes. Further, between the light source 3 and the projection lens 4 , at their focal position and near the second focus of the reflector 2 an aperture device 6 provided, which has an elongated member or in this case is formed as such and is rotatable about a longitudinal axis A. The aperture device 6 is only with its outer circle 60 indicated by a rotation of the aperture device 6 around the axis of rotation A results. The mentioned components of the projection headlamp 1 are in a housing 70 held by a lens 5 is covered in the direction of radiation L. In addition, the emission direction L can be changed by the projection headlight 1 or parts thereof (preferably a swivel module) about a vertical (V) or horizontal axis H is pivoted.

In the 2a to c is now the aperture device 6 shown in detail. It has four wings 7 . 8th . 9 . 10 on, which are perpendicular to each other, such that in cross-section in approximately a cross-shaped shape results (see. 2c ). The wing 7 is approximately in the middle of its longitudinal extent with a clear, gap-shaped gap 11 provided by two aligned pointed edges 12 is formed. The edges 12 form in the illustrated position of the aperture device 6 at the same time vertical shading lines through which the light source 3 radiated and at the reflector 2 reflected light is shadowed and only a narrow beam of light through the clear space 11 can pass through which excellent as a marker light ML or escape light FL (see. 4 ) can serve. Similarly, of course, the horizontally extending top edge of the wing 7 a horizontally extending Abschattungslinie, this advantageous by a dashed line indicated Abschattungslinien pattern 19 (which corresponds to that for producing a conventional low beam) can be modified or superimposed. Of course, it is conceivable, the width of the clear gap 11 to vary as needed or u. U. also provide several such clear spaces. Also, it may well be appropriate, the clear space 11 with a color filter (not shown) to fill.

The wing 8th however, has two horizontally extending Abschattungslinien 16 and 17 and an oblique, this connecting shading line 18 so that a total of a shading pattern results, which corresponds to the generation of a conventional low beam.

The wing 9 also has two horizontal shading lines 14 and 15 on, with the shading line 14 in their distance to the outer circle 60 is clearly set back. The shading lines 14 . 15 are by a vertical shading line 13 connected to each other, such that a Abschattungslinien pattern results, which is suitable for the production of a masked long-distance high-beam.

Finally, be the wing 10 mentioned, whose running in the position shown lower edge, which also from the outer circle 60 is clearly set back, forms the Abschattungslinie to produce an unmasked high beam, so a high beam, which has no vertically extending, but only a horizontally extending light-dark boundary.

It will be readily apparent to one skilled in the art that when using the aperture device 6 in the projection headlight 1 in a simple way, by rotation of the diaphragm device 6 around its axis of rotation A more light functions can be realized. So can in the in 2a shown position of the aperture device 6 in which the wing 7 directed upward, so facing away from the road bottom, a marker or escape light (possibly with superimposed low beam) are generated. Another rotation of the aperture device 6 by about 90 ° ( 2 B ) would lead to the realization of only a low beam function. Starting from this position, a rotation of the diaphragm device 6 turn by about 180 °, the light function of a masked long-range high-beam enable.

In the 3a to c is now an alternative embodiment 6 ' represented for a diaphragm device. The aperture device 6 ' is approximately cylindrical in shape and has an upper half-cylinder 20 and a lower half cylinder 21 which are thoughtfully divided by the axis A from each other. The upper half cylinder 20 is with a clear, gap-shaped gap 22 provided, which by two aligned edges 23 is formed and approximately in the middle of the longitudinal extent of the diaphragm device 6 ' located. The edges 23 form in the position shown ( 3a ) of the aperture device 6 ' at the same time vertical shading lines through which the light source 3 radiated and at the reflector 2 reflected light is shadowed and only a narrow beam of light through the clear space 22 can pass through which excellent as a marker light ML or escape light FL (see. 4 ) can serve. Similarly, of course, the horizontally extending top of the half-cylinder 20 a horizontally extending Abschattungslinie, this advantageous by a dashed line indicated Abschattungslinien pattern 28 (which the that for the production of a usual Ab bright light corresponds) can be modified or superimposed. Also for this embodiment, it should be mentioned that the width of the clear gap 22 as well as his position can be varied. Likewise, applications are conceivable in which several clear spaces are advantageous. Also in this embodiment, the gap may be filled with a color filter, not shown.

The lower half cylinder 21 however, it forms two horizontal shading lines 29 and 31 out through a vertical shading line 30 are interconnected, creating a comparable shading pattern, as is the wing 9 out 2 B can be removed. It is therefore also the light function of a masked long-distance light realized.

Also in this embodiment is readily apparent that when using the aperture device 6 ' in the projection headlight 1 in a simple way, by rotation of the diaphragm device 6 ' around its axis of rotation A more light functions can be realized. So can in the in 3a shown positions of the aperture device 6 ' in which the half cylinder 20 directed upward, so facing away from the road bottom, a marker or escape light (possibly with superimposed low beam) are generated. Another rotation of the aperture device 6 ' by about 180 ° (position not shown) would lead to the realization of a masked long distance light.

With reference to the 3b It should be noted that the upper half cylinder 20 a transverse symmetry axis S, through which the upper half-cylinder 20 into a right ( 24 ) and a left part 25 is divided. Everybody has their share 24 and 25 a triangular end area 26 respectively. 27 on, whose triangle tip is an edge 23 formed.

Finally, on the 4 Referenced. In this is a moving motor vehicle 71 shown, which is equipped with a headlamp assembly having two inventive, spaced projection headlights (right side of the vehicle, left side of the vehicle). Furthermore, there is a standing on the right roadside standing obstacle 72 represented, which may be, for example, a stalled motor vehicle. Furthermore, on the right side of the road is a pedestrian 73 indicated. The car 71 drives first with a light distribution LV (indicated by dashed lines), which corresponds to that of a normal low beam. This could be an aperture device used in the projection headlights 6 take a position in which the wing 8th vertically upwards, ie facing away from the roadway floor ( 2 B ). Now discovers the driver assistance system of the motor vehicle 71 (With corresponding detection and evaluation, not shown), for example, the pedestrian 73 , so can by appropriate control signals, the aperture device 6 be controlled in the projection headlights in each case so that these ( 6 ) is rotated 90 ° about the axis A upwards, so that the edges 12 form vertical shading lines (cf. 2a ) and thus a narrow beam of light can be generated. Furthermore, the swivel module of the projection headlamp (s) is so in the direction of the pedestrian 73 panned that the light beam as marker light ML the pedestrian 73 marked as accurately as possible. The width of the light beam from the marker light ML can also be influenced by the positioning of the two projection headlights relative to each other. Similarly, it is also possible that with the mentioned position of the aperture device 6 a narrow escape light FL is generated, which the driver has an "escape route", with which he can avoid the obstacle and prevent a collision.

The headlamp assembly of the motor vehicle 71 can be further improved in its flexibility with regard to the producible different or common light functions when passing through the Abschattungslinien 12 respectively. 23 formed light gap 11 respectively. 22 at the aperture device 6 respectively. 6 ' the projection headlight is in each case arranged at different locations and / or has different dimensions.

LIST OF REFERENCE NUMBERS

1

projection headlights

2

reflector

3

light source

4

projection lens

5

Lens

6 6 '

aperture means

7

wing the aperture device 6

8th

wing the aperture device 6

9

wing the aperture device 6

10

wing the aperture device 6

11

lights Gap in wing 7

12

on each other directed edges

13

vertical Shading line of wing 9

14

horizontal Shading line of wing 9

15

horizontal Shading line of wing 9

16

horizontal Shading line of wing 8

17

horizontal Shading line of wing 8

18

slope Shading line of wing 8

19

superimposable Shading line for wings 7

20

upper Half cylinder of the diaphragm device 6 '

21

lower Half cylinder of the diaphragm device 6 '

22

lights Interspace in the upper half-cylinder 20

23

on each other directed edges

24

right Side of the upper half-cylinder 20

25

left Side of the upper half-cylinder 20

26

triangular end

27

triangular end

28

superimposable Shading line for the upper half-cylinder 20

29

horizontal Shading line from the lower half cylinder 21

30

vertical Shading line from the lower half cylinder 21

31

horizontal Shading line from the lower half cylinder 21

60 60 '

enveloping circle the diaphragm devices 6, 6 '

70

casing

71

traveling motor vehicle

72

standing obstacle

73

pedestrian

A

axis of rotation the aperture device 6

FL

floodlight

H

horizontal axis

L

radiation direction

LV

light distribution

ML

marker light

S

plane of symmetry

V

vertical axis

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - WO 2008/037388 A2 [0004]
• - DE 102006043281 A1 [0005]

Claims (10)

Projection headlights ( 1 ) for a motor vehicle, with a reflector ( 2 ), at least one in the reflector ( 2 ) arranged light source ( 3 ), one in front of the reflector ( 2 ) arranged projection lens ( 4 ) and at least one between reflector ( 2 ) and projection lens ( 4 ) arranged aperture device ( 6 . 6 ' ) for shading part of the light source ( 3 ) and from the reflector ( 2 ) reflected light rays, wherein the aperture device ( 6 . 6 ' ) at least one about a longitudinal axis (A) rotatable, elongate member ( 6 . 6 ' ), which longitudinal axis (A) transversely to the light emission direction (L) of the projection headlamp ( 1 ), characterized in that the component ( 6 . 6 ' ) at least two shading lines ( 12 respectively. 23 ) having between them a clearance ( 11 respectively. 22 ) and the component ( 6 . 6 ' ) can be brought by rotation about the longitudinal axis (A) in such a position that the shading lines ( 12 respectively. 23 ) are substantially vertical. Projection headlights ( 1 ) according to claim 1, characterized in that the shading lines ( 12 respectively. 23 ) are spaced such that a gap-shaped, light gap ( 11 respectively. 22 ). Projection headlights ( 1 ) according to at least one of the preceding claims, characterized in that the shading lines ( 12 respectively. 23 ) by two mutually aligned edges ( 12 respectively. 23 ) are formed. Projection headlights ( 1 ) according to at least one of the preceding claims, characterized in that the clear space ( 11 respectively. 22 ) is provided with a color filter. Projection headlights ( 1 ) according to at least one of the preceding claims, characterized in that depending on the rotational position of the component ( 6 . 6 ' ) can realize a plurality of light functions, in particular a low beam (LV), a masked long distance beam or a marker or escape light (ML or FL). Projection headlights ( 1 ) according to at least one of the preceding claims, characterized in that the change from one light function (LV) to another (ML or FL) by a rotation of the component ( 6 . 6 ' ) by about 90 ° or a multiple thereof. Projection headlights ( 1 ) according to at least one of the preceding claims, characterized in that the component ( 6 ' ) is approximately cylindrical in shape, so that in cross-section in approximately a circular appearance results with a first half-cylinder ( 20 ) and a second half cylinder ( 21 ), wherein at least each half cylinder ( 20 . 21 ) is assigned a shading line pattern for the realization of a specific light function (LV, ML or FL). Projection headlights ( 1 ) according to at least one of the preceding claims, characterized in that the component ( 6 ) at least two, approximately perpendicular to each other and from the axis of rotation (A) protruding wing-like parts ( 7 . 8th . 9 . 10 ), each wing-like part ( 7 . 8th . 9 . 10 ) has a shading pattern, which contributes to the realization of a specific light function (LV, ML or FL). Projection headlights ( 1 ) according to at least one of the preceding claims, characterized in that the component ( 6 ) four, approximately perpendicular wing-like parts ( 7 . 8th . 9 . 10 ) having. Headlamp assembly for a motor vehicle having at least two spaced-apart projection headlamps according to at least one of the preceding claims 1 to 9, wherein the light emitted by the shading lines ( 12 respectively. 23 ) formed clear space ( 11 respectively. 22 ) in the component ( 6 respectively. 6 ' ) at least two projection headlights is arranged in each case at different locations and / or has different dimensions.

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