EP2993390A1 - Headlight for a motor vehicle and a motor vehicle - Google Patents
Headlight for a motor vehicle and a motor vehicle Download PDFInfo
- Publication number
- EP2993390A1 EP2993390A1 EP15002484.2A EP15002484A EP2993390A1 EP 2993390 A1 EP2993390 A1 EP 2993390A1 EP 15002484 A EP15002484 A EP 15002484A EP 2993390 A1 EP2993390 A1 EP 2993390A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- headlamp
- converter element
- generating device
- headlight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004065 semiconductor Substances 0.000 claims abstract description 39
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 239000006096 absorbing agent Substances 0.000 claims abstract description 8
- 238000009826 distribution Methods 0.000 claims description 41
- 230000003595 spectral effect Effects 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000001419 dependent effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/16—Laser light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/36—Combinations of two or more separate reflectors
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- 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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
- F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
Definitions
- the invention relates to a headlight for a motor vehicle according to the preamble of claim 1. Furthermore, the invention relates to a motor vehicle.
- a headlight for a motor vehicle comprising a light generating device and a mirror assembly consisting of a plurality of micro-mirror elements. These micromirror elements are adjustable independently of one another at least between a reflection position, in which the light generated by the light-generating device is reflected out of the headlight by the micromirror element, and an absorber position in which the light is mostly or completely reflected by the micromirror element segment into an absorption region.
- the light distribution of the headlamp can be changed, for example, so that a driver of an oncoming motor vehicle is not dazzled.
- a disadvantage of such a headlight is in particular that a high electrical power is needed.
- a headlight for a motor vehicle with a light generating device and a mirror assembly wherein the light generating device comprises a plurality of LED light sources.
- the light generating device comprises a plurality of LED light sources.
- Each LED light source is assigned in each case a reflector as an optical element, which together form an optical unit. This is intended in particular to realize a high-beam function of the headlight, in which the light distribution of the headlight can be adapted to the requirements of a traffic area.
- Such a headlamp with a reflector per LED light source is particularly complex and expensive.
- the US 2012/0106178 A1 describes a headlight for a motor vehicle, in which a laser beam is a converter element for fluorescence stimulates. The light emitted by the fluorescent converter element is reflected by a concave mirror out of the headlight.
- a plurality of lasers and / or converter elements can be provided, wherein each laser and / or converter element is then assigned a concave mirror.
- a disadvantage of the necessarily used concave mirrors is that they can not be formed as adjustable mirror elements. This is prevented by the concave shape of the mirror, which is also particularly expensive to manufacture.
- Object of the present invention is to provide a headlight for a motor vehicle and a car itself, which are particularly favorable.
- the light generating device comprises at least one semiconductor light source and at least one converter element arranged in the beam path of the headlamp in front of the mirror arrangement formed from micromirrors and excitable by the semiconductor light source for illumination, wherein the converter element is designed to radiate the light emitted by it onto the mirror arrangement.
- a semiconductor light source generates very little heat, requires a particularly low electrical power and has a particularly long service life.
- respective other components of the headlight in particular optical elements, particularly little thermally stressed.
- the converter element can be formed by a material that can be excited by the semiconductor light source for fluorescence.
- a preferred light distribution of the light emitted by the converter element light can be generated in a particularly simple and cost-effective manner.
- it may also be formed from a material which merely scatters the light emitted by the semiconductor light source.
- the beam path in the headlight is as follows:
- the semiconductor light source generates light. This light strikes the converter element, causing it to glow.
- the light thereby emitted by the converter element subsequently impinges on the mirror arrangement, which consists of the adjustable micromirror elements.
- the mirror arrangement which consists of the adjustable micromirror elements.
- the absorption region is usually formed by a component having a black-colored surface which absorbs at least a majority of the light.
- the advantage of the mirror arrangement with adjustable micromirror elements be utilized, namely that the light distribution of the headlamp is adjustable.
- the converter element is arranged in the beam path behind the mirror arrangement, the light distribution of the headlamp is otherwise only limited changeable.
- the etendue of the converter element is less than or equal to the etendue of the mirror assembly.
- the etendue measures the extent of a bundle of rays in geometric optics and consists of a cross-section and a solid angle.
- the etendue is a conserved quantity of geometric optics and does not change when a beam passes through an optical system.
- the Etendue describes how much the light has already fanned out. Due to the fact that the etendue of the converter element is less than or equal to the etendue of the mirror arrangement, no light output is lost during the reflection of the light emitted by the converter element due to the mirror arrangement. By such a particularly good vote of the converter element on the mirror assembly by means of Etendue so the efficiency of the headlamp can be particularly increased.
- the at least one semiconductor light source comprises a light-emitting diode or a laser.
- LEDs Compared to the laser, they are particularly cheap and also generate very little heat.
- the laser offers the advantage that its luminance can be scaled almost arbitrarily, whereby the luminance can be increased for the same area. That is, with the same luminance of the light emerging from the headlamp, a particularly small mirror arrangement can be used when using a laser. As a result, the mirror arrangement is particularly cost-effective and requires very little space.
- the light generating device is designed to generate light with at least two different spectral distributions.
- the spectral distribution of light describes the color of the light.
- the headlamp can be used in a particularly simple manner to project information for the driver on the street in front of the cars. This information can be, for example, the speed of the motor vehicle, route instructions of a navigation system or generally all the information that is otherwise made to the driver in the cockpit of the motor vehicle.
- individual micromirrors of the mirror arrangement are selectively adjusted between the reflection position and the absorber position.
- the headlight can take over the function of a turn signal. Accordingly, no additional elements or components are necessary to integrate in the headlight a turn signal function, whereby such a headlamp is particularly cost.
- the light generating device comprises at least two semiconductor light sources for generating and / or two converter elements for emitting light with the different spectral distributions.
- the light generating device comprises at least two semiconductor light sources for generating and / or two converter elements for emitting light with the different spectral distributions.
- light with different spectral distributions can be generated in a particularly simple and cost-effective manner.
- a controller can then be issued by the headlight light with different spectral distributions.
- This solution is known for example from so-called beamers from home.
- Such an additional wheel is particularly expensive, requires a lot of space and a particularly complex control device. All of these disadvantages can be overcome by the use of at least two semiconductor light sources and / or two converter elements be avoided. Accordingly, such a designed headlight is particularly cost-effective and very space-saving.
- the light generating device comprises a light guide for transporting the light generated by the at least one semiconductor light source to the at least one converter element.
- the light guide thus makes it possible that the beam path of the light generated by the at least one semiconductor light source does not have to lead in a straight line to the at least one converter element. Rather, the generated light follows the course of the light guide. This allows a free choice of the position of the at least one semiconductor light source and thus a particularly compact headlight.
- the light guide has the advantage that less light is directed by scattering on the mirror assembly over. Overall, the etendue of the semiconductor light source can thus be adapted particularly well to the etendue of the converter element and thus also of the mirror arrangement. Thus, the efficiency of the headlamp designed in this way is particularly high.
- the headlamp comprises an optical device by means of which a luminance distribution of the light emitted from the converter element is preformed so that the light when hitting the mirror assembly in a peripheral region of the mirror assembly, a lower luminance than in a Center region of the mirror assembly has.
- the luminance in the edge region should be ten percent less, in particular twenty percent less, than in the center region of the mirror arrangement.
- a light distribution can be adapted to the later desired light distribution of the light emerging from the spotlight even before it hits the mirror arrangement.
- the light distribution of the incident on the mirror assembly light already corresponds to the desired light distribution of the high beam or the low beam.
- the optical device comprises at least one reflector and / or an optical lens. In this way, the light emitted by the converter element can be preformed in a particularly simple and particularly favorable manner.
- the converter element is designed to emit light with a location-dependent luminance.
- the light emitted by the converter element light can be easily preformed.
- the optical device for preforming can thus be formed by the converter element, so that a particularly compact headlamp can be realized.
- the converter element emits light which impinges on the edge region of the mirror arrangement with a low luminance than in the middle region of the mirror arrangement.
- the converter element can, for example, generate a location-dependent luminance by a different, location-dependent thickness.
- a converter element that is thinner in its edge region can emit light with a lower luminance there than in a thicker center region in comparison.
- Fig. 1 shows in a schematic plan view of a motor vehicle 10 with two headlights 12, which can be controlled by a control device 14.
- the headlights 12 By means of the headlights 12, light can be generated which illuminates a region of a road with a light distribution 46 in front of the motor vehicle 10.
- Each of the headlamps 12 may include: a light generating device 18 and a mirror assembly 28 consisting of a plurality of micromirror elements which is reflected between at least one reflection position where the light generated by the light generating device 18 is reflected out of the headlamp 12 by the micromirror element, and an absorber position in which the light is largely or completely reflected by the micromirror segment in an absorption region, wherein the micromirror elements are independently adjustable.
- the light-generating device 18 comprises at least one semiconductor light source 16 and at least one in the beam path of the headlamp 12 in front of the mirror assembly (28) arranged and excitable by the semiconductor light source 16 to excite converter element 24, wherein the converter element 24 for emitting the light emitted by him on the mirror assembly 28th is designed.
- Fig. 2 shows in a schematic representation, at least in part, such a headlight 12.
- three semiconductor light sources 16 of the light generating device 18 each generate a laser beam 20.
- the semiconductor light sources 16 are thus configured here as lasers 22, which enable a generation of light with a particularly high luminance.
- the semiconductor light source 16 may also have a Include light emitting diode (LED).
- the laser beams 20 impinge on the converter element 24 of the light-generating device 18.
- the converter element 24 has a fluorescent material, which is excited by absorption of the laser beams 20 to illuminate and thus to emit light.
- the converter element 24 may be designed, for example, to be excited with a blue or red laser beam 20 to emit white light. Corresponding materials are known from the prior art. The emission of this light is illustrated by the dashed lines 26.
- the light generating device 18 thus comprises at least one semiconductor light source 16 and at least one arranged in the beam path of the headlamp 12 and by the semiconductor light source 16 to stimulable converter element 24, wherein the converter element 24 is designed for emitting the light emitted by him to the mirror assembly 28.
- the mirror assembly 28 is comprised of a plurality of micromirror elements which are reflected between at least one reflection position where the light generated by the light generator 18 is reflected out of the headlamp 12 by the micromirror element and an absorber position where the light is largely or completely from the micromirror segment is reflected in an absorption region, are independently adjustable.
- Such a mirror arrangement 28 with a plurality of micromirror elements is also referred to as a digital micromirror device or DMD for short.
- Each micromirror element can be individually adjusted in its angle and has two stable end states, between which the micromirror element can change within a second, for example, up to 5000 times.
- a period of time for which the micromirror element remains in the reflection position and / or the absorber position can be varied.
- the micromirror element typically oscillates continuously between these states. Only by changing the time duration for which the micromirror element remains in one position, a perceived reflection strength in this mirror element is varied for a viewer. It can reflections from the headlight 12 out with a viewer for hardly or no longer perceptible losses are produced up to an imperceptible reflection from the headlight 12 out through the micromirror element.
- the light reflected by the mirror arrangement 28 with the micromirror elements in the reflection position passes over a lens 30, as shown in FIG Fig. 1 is shown out of the headlight 12 out.
- the brightness of individual pixels of the light distribution 46 of the headlamp 12 can be adjusted and rapidly changed. Accordingly, with the mirror arrangement 28, individual areas of the light distribution 46 of the headlights 12 can therefore be masked out in a targeted manner by the individually adjustable micromirror elements. A weakening of individual areas is also possible.
- Fig. 3 shows in a schematic representation of an alternative embodiment of the in Fig. 2
- the light generating device 18 additionally comprises a light guide 32 for transporting the light generated by the semiconductor light source 16 to the converter element 24.
- the light guide 32 can particularly reduce losses due to scattering by ensuring that the light generated by the semiconductor light source 16 bundled meets the converter element 24.
- the semiconductor light source 16 can thus be positioned independently of a straight line of sight on the converter element 24, since the light generated by the semiconductor light source 16 follows the course of the light guide 32. This makes it possible to create a particularly compact headlight 12.
- Positioning the semiconductor light source 16 independently of the position of the converter element 24 by means of the light guide 32 also makes it possible to reduce the heat radiation of the semiconductor light source 16 to thermally sensitive components of the headlight 12.
- Fig. 4 shows in a schematic representation an alternative embodiment of the in Fig. 2
- the headlamp 12 shown wherein the headlamp 12 comprises an optical device 34, whereby a luminance distribution of the light emitted from the converter element 24 light is preformed so that the light when hitting the mirror assembly 28 in a peripheral region of the mirror assembly 28 has a lower luminance than in a central region of the Mirror assembly 28 has.
- Fig. 4 shows how the light emitted by the converter element 24 light first strikes the optical device 34 and from there on the mirror assembly 28 radiates. The course of the beam path is illustrated here by the dashed lines 36.
- FIG. 5 An exemplary light distribution 50 thus produced on the mirror assembly 28 is shown in the graph of FIG Fig. 5 shown.
- the y and x axes designate the surface coordinates on the mirror arrangement 28 relative to a center point.
- the relative luminance of the incident on the mirror assembly 28 on the surface light is applied. The highest value corresponds to the maximum luminance.
- the center region is indicated by the reference numeral 38, while the peripheral region is indicated by the reference numeral 40. It can be clearly seen that the luminosity in the center region 38 assumes its maximum, while it has a significantly lower luminance in the edge region 40 of the mirror arrangement 28.
- the preformed light is optimized for the light distribution 50 of a high beam.
- the light distribution 50 can also be preformed for a low beam or other functions.
- Fig. 6 shows in a schematic representation a further alternative embodiment of the in Fig. 2
- the light generating device 18 is here designed to generate light with at least two different spectral distributions.
- a combination of the semiconductor light source 16 with the converter element 24 is configured to generate white light.
- a further semiconductor light source 16 with a further converter element 24 is designed to generate yellow light.
- the white light is used to illuminate a large portion 42 of the street.
- the yellow light is used illuminate only a small portion 44 of the street or the light distribution 46 with respect to the vehicle front left.
- a clearly visible turn signal for other road users are projected onto the street.
- two different semiconductor light sources 16 In order to generate light with at least two different spectral distributions, it is alternatively also possible for two different semiconductor light sources 16 to excite only one converter element 24 for emitting light with different spectral distributions. Likewise, it is alternatively possible that only one semiconductor light source 16 excites two different converter elements 24 each for emitting light with a different spectral distribution. The light with different spectral distributions does not have to hit different areas of the mirror arrangement 28, but alternatively may also radiate to the entire mirror arrangement 28. However, all of these alternatives require intelligent control of the light-generating device 18 and / or the mirror arrangement 28 in order, for example, to illuminate the partial areas 42 and 44 of the light distribution 46 with light having a different spectral distribution. Optionally, however, so that the realization of a particularly compact headlamp 12 is possible.
- the life of the headlamp 12 is particularly large. There is a particularly low heat input to the mirror assembly 28 so that it is heated very little and a particularly long life and high efficiency of the mirror assembly 28 is ensured. It is a particularly low cooling effort for the headlamp 12 necessary, which is particularly important in the automotive sector.
Abstract
Die Erfindung betrifft einen Scheinwerfer (12) für einen Kraftwagen (10), mit einer Lichterzeugungseinrichtung (18) und einer Spiegelanordnung (28), welche eine Vielzahl von Mikrospiegelelementen aufweist, welche zwischen wenigstens einer Reflexionsstellung, bei welcher das durch die Lichterzeugungseinrichtung (18) erzeugte Licht durch das Mikrospiegelelement aus dem Scheinwerfer (12) heraus reflektiert wird, und einer Absorberstellung, bei welcher das Licht größtenteils oder vollständig von dem Mikrospiegelsegment in einen Absorptionsbereich reflektiert wird, unabhängig voneinander verstellbar sind, wobei die Lichterzeugungseinrichtung (18) wenigstens eine Halbleiterlichtquelle (16) und wenigstens ein im Strahlengang des Scheinwerfers (12) vor der Spiegelanordnung (28) angeordnetes und durch die Halbleiterlichtquelle (16) zum Leuchten anregbares Konverterelement (24) umfasst, wobei das Konverterelement (24) zum Abstrahlen des von ihm abgegebenen Lichts auf die Spiegelanordnung (28) ausgelegt ist. Weiterhin betrifft die Erfindung einen Kraftwagen (10).The invention relates to a headlamp (12) for a motor vehicle (10), comprising a light generating device (18) and a mirror assembly (28) comprising a plurality of micromirror elements disposed between at least one reflection position at which the light generating device (18). light generated by the micromirror element is reflected out of the headlamp (12), and an absorber position in which the light is largely or completely reflected by the micromirror segment into an absorption region are independently adjustable, the light-generating device (18) comprising at least one semiconductor light source ( 16) and at least one in the beam path of the headlamp (12) in front of the mirror assembly (28) arranged and by the semiconductor light source (16) excitable lighting converter element (24), wherein the converter element (24) for emitting the light emitted by him on the Mirror arrangement (2 8) is designed. Furthermore, the invention relates to a motor vehicle (10).
Description
Die Erfindung betrifft einen Scheinwerfer für einen Kraftwagen gemäß dem Oberbegriff des Patentanspruchs 1. Des Weiteren betrifft die Erfindung einen Kraftwagen.The invention relates to a headlight for a motor vehicle according to the preamble of
Aus der
Aus der
Die
Aufgabe der vorliegenden Erfindung ist es, einen Scheinwerfer für einen Kraftwagen sowie einen Kraftwagen selbst zu schaffen, welche besonders günstig sind.Object of the present invention is to provide a headlight for a motor vehicle and a car itself, which are particularly favorable.
Diese Aufgabe wird erfindungsgemäß durch einen Scheinwerfer mit den Merkmalen des Patentanspruchs 1 gelöst. Weiterhin wird diese Aufgabe erfindungsgemäß durch einen Kraftwagen mit den Merkmalen des Patentanspruchs 10 gelöst. Vorteilhafte Ausgestaltungen mit zweckmäßigen Weiterbildungen der Erfindung sind in den übrigen Patentansprüchen angegeben.This object is achieved by a headlamp with the features of
Um einen Scheinwerfer der eingangs genannten Art zu schaffen, welcher besonders günstig ist, ist es erfindungsgemäß vorgesehen, dass die Lichterzeugungseinrichtung wenigstens eine Halbleiterlichtquelle und wenigstens ein im Strahlengang des Scheinwerfers vor der aus Mikrospiegeln gebildeten Spiegelanordnung angeordnetes und durch die Halbleiterlichtquelle zum Leuchten anregbares Konverterelement umfasst, wobei das Konverterelement zum Abstrahlen des von ihm abgegebenen Lichts auf die Spiegelanordnung ausgelegt ist. Eine Halbleiterlichtquelle erzeugt besonders wenig Wärme, benötigt eine besonders geringe elektrische Leistung und weist eine besonders hohe Lebensdauer auf. Insbesondere durch die geringe Wärmeerzeugung werden jeweilige andere Bauteile des Scheinwerfers, insbesondere optische Elemente, besonders wenig thermisch belastet.In order to provide a headlamp of the type mentioned, which is particularly favorable, it is provided according to the invention that the light generating device comprises at least one semiconductor light source and at least one converter element arranged in the beam path of the headlamp in front of the mirror arrangement formed from micromirrors and excitable by the semiconductor light source for illumination, wherein the converter element is designed to radiate the light emitted by it onto the mirror arrangement. A semiconductor light source generates very little heat, requires a particularly low electrical power and has a particularly long service life. In particular, due to the low heat generation respective other components of the headlight, in particular optical elements, particularly little thermally stressed.
Das Konverterelement kann durch ein mittels der Halbleiterlichtquelle zum Fluoreszieren anregbares Material gebildet sein. Damit kann in besonders einfacher und kostengünstiger Weise eine bevorzugte Lichtverteilung des durch das Konverterelement abgegebenen Lichtes erzeugt werden. Alternativ kann es beispielsweise auch aus einem Material gebildet sein, das lediglich das durch die Halbleiterlichtquelle ausgestrahlte Licht streut. Durch das Konverterelement wird keine zusätzliche Wärme erzeugt, sodass die thermische Belastung des Scheinwerfers besonders gering ist.The converter element can be formed by a material that can be excited by the semiconductor light source for fluorescence. Thus, a preferred light distribution of the light emitted by the converter element light can be generated in a particularly simple and cost-effective manner. Alternatively, for example, it may also be formed from a material which merely scatters the light emitted by the semiconductor light source. By the Converter element is generated no additional heat, so that the thermal load of the headlamp is particularly low.
Der Strahlengang im Scheinwerfer ist wie folgt: Die Halbleiterlichtquelle erzeugt Licht. Dieses Licht trifft auf das Konverterelement, wodurch dieses zum Leuchten angeregt wird. Das dadurch von dem Konverterelement abgegebene Licht trifft anschließend auf die Spiegelanordnung, welche aus den verstellbaren Mikrospiegelelementen besteht. Je nach Stellung wird das Licht dann von den Mikrospiegelelementen aus dem Scheinwerfer heraus oder in einen Absorptionsbereich reflektiert. Der Absorptionsbereich ist üblicherweise durch ein Bauteil mit einer schwarze Farbe aufweisenden Oberfläche gebildet, welche wenigstens einen Großteil des Lichtes absorbiert. Diese Anordnung hat zwei Vorteile. Erstens wird die Spiegelanordnung vor einer durch die Halbleiterlichtquelle erzeugten Wärme geschützt. Die thermisch empfindliche Spiegelanordnung wird also im Wesentlichen lediglich durch das auf sie treffende Licht erwärmt. Zweitens kann erst so der Vorteil der Spiegelanordnung mit verstellbaren Mikrospiegelelementen genutzt werden, nämlich dass die Lichtverteilung des Scheinwerfers einstellbar ist. Insbesondere wenn das Konverterelement im Strahlengang hinter der Spiegelanordnung angeordnet ist, ist die Lichtverteilung des Scheinwerfers sonst nur noch eingeschränkt veränderbar.The beam path in the headlight is as follows: The semiconductor light source generates light. This light strikes the converter element, causing it to glow. The light thereby emitted by the converter element subsequently impinges on the mirror arrangement, which consists of the adjustable micromirror elements. Depending on the position, the light is then reflected by the micromirror elements out of the headlight or into an absorption region. The absorption region is usually formed by a component having a black-colored surface which absorbs at least a majority of the light. This arrangement has two advantages. First, the mirror assembly is protected from heat generated by the semiconductor light source. The thermally sensitive mirror arrangement is thus heated substantially only by the light impinging on it. Secondly, only then can the advantage of the mirror arrangement with adjustable micromirror elements be utilized, namely that the light distribution of the headlamp is adjustable. In particular, if the converter element is arranged in the beam path behind the mirror arrangement, the light distribution of the headlamp is otherwise only limited changeable.
In weiterer vorteilhafter Ausgestaltung der Erfindung ist es vorgesehen, dass die Etendue des Konverterelements kleiner oder gleich der Etendue der Spiegelanordnung ist. Die Etendue misst die Ausdehnung eines Strahlenbündels in der geometrischen Optik und setzt sich aus einem Querschnitt und einem Raumwinkel zusammen. Die Etendue ist eine Erhaltungsgröße der geometrischen Optik und ändert sich nicht beim Durchgang eines Strahlenbündels durch ein optisches System. Bei einem Scheinwerfer beschreibt die Etendue, wie stark das Licht bereits aufgefächert ist. Dadurch, dass die Etendue des Konverterelements kleiner oder gleich der Etendue der Spiegelanordnung ist, geht bei der Reflexion des durch das Konverterelement abgegebenen Lichtes durch die Spiegelanordnung keine Lichtleistung verloren. Durch solch eine besonders gute Abstimmung des Konverterelements auf die Spiegelanordnung mittels der Etendue kann also die Effizienz des Scheinwerfers besonders gesteigert werden.In a further advantageous embodiment of the invention, it is provided that the etendue of the converter element is less than or equal to the etendue of the mirror assembly. The etendue measures the extent of a bundle of rays in geometric optics and consists of a cross-section and a solid angle. The etendue is a conserved quantity of geometric optics and does not change when a beam passes through an optical system. With a headlight, the Etendue describes how much the light has already fanned out. Due to the fact that the etendue of the converter element is less than or equal to the etendue of the mirror arrangement, no light output is lost during the reflection of the light emitted by the converter element due to the mirror arrangement. By such a particularly good vote of the converter element on the mirror assembly by means of Etendue so the efficiency of the headlamp can be particularly increased.
Als weiterhin vorteilhaft hat es sich gezeigt, wenn die wenigstens eine Halbleiterlichtquelle eine Leuchtdiode oder einen Laser umfasst. Leuchtdioden sind im Vergleich zum Laser besonders günstig und erzeugen zudem besonders wenig Wärme. Der Laser bietet den Vorteil, dass seine Leuchtdichte nahezu beliebig skaliert werden kann, wodurch die Leuchtdichte bei gleicher Fläche erhöht werden kann. Das heißt, bei gleicher Leuchtdichte des aus dem Scheinwerfer heraustretenden Lichtes kann bei der Verwendung eines Lasers eine besonders kleine Spiegelanordnung benutzt werden. Dadurch ist die Spiegelanordnung besonders kostengünstig und benötigt besonders wenig Bauraum.As further advantageous, it has been shown that the at least one semiconductor light source comprises a light-emitting diode or a laser. LEDs Compared to the laser, they are particularly cheap and also generate very little heat. The laser offers the advantage that its luminance can be scaled almost arbitrarily, whereby the luminance can be increased for the same area. That is, with the same luminance of the light emerging from the headlamp, a particularly small mirror arrangement can be used when using a laser. As a result, the mirror arrangement is particularly cost-effective and requires very little space.
In besonders vorteilhafter Ausgestaltung der Erfindung ist es vorgesehen, dass die Lichterzeugungseinrichtung dazu ausgelegt ist, Licht mit wenigstens zwei unterschiedlichen Spektralverteilungen zu erzeugen. Die Spektralverteilung des Lichts beschreibt die Farbe des Lichts. Damit kann der Scheinwerfer in besonders einfacher Weise dazu genutzt werden, Informationen für den Fahrer auf die Straße vor den Kraftwagen zu projizieren. Bei diesen Informationen kann es sich beispielsweise um die Geschwindigkeit des Kraftwagens handeln, Routenanweisungen eines Navigationssystems oder generell alle Angaben, die dem Fahrer sonst im Cockpit des Kraftwagens gemacht werden. Zu diesem Zweck werden einzelne Mikrospiegel der Spiegelanordnung gezielt zwischen der Reflexionsstellung und der Absorberstellung verstellt. Weiterhin kann der Scheinwerfer so die Funktion eines Blinkers übernehmen. Entsprechend sind keine zusätzlichen Elemente oder Bauteile notwendig, um in dem Scheinwerfer eine Blinkerfunktion zu integrieren, wodurch solch ein Scheinwerfer besonders kostengünstig ist.In a particularly advantageous embodiment of the invention, it is provided that the light generating device is designed to generate light with at least two different spectral distributions. The spectral distribution of light describes the color of the light. Thus, the headlamp can be used in a particularly simple manner to project information for the driver on the street in front of the cars. This information can be, for example, the speed of the motor vehicle, route instructions of a navigation system or generally all the information that is otherwise made to the driver in the cockpit of the motor vehicle. For this purpose, individual micromirrors of the mirror arrangement are selectively adjusted between the reflection position and the absorber position. Furthermore, the headlight can take over the function of a turn signal. Accordingly, no additional elements or components are necessary to integrate in the headlight a turn signal function, whereby such a headlamp is particularly cost.
Als besonders vorteilhaft hat es sich gezeigt, wenn die Lichterzeugungseinrichtung wenigstens zwei Halbleiterlichtquellen zum Erzeugen und/oder zwei Konverterelemente zum Abgeben von Licht mit den unterschiedlichen Spektralverteilungen umfasst. Damit kann auf besonders einfache und kostengünstige Weise Licht mit unterschiedlichen Spektralverteilungen erzeugt werden. Andernfalls ist es beispielsweise notwendig, ein bewegliches Rad im Scheinwerfer mit daran befestigten, unterschiedlich farbigen Blenden im Strahlengang des Lichts vorzusehen. Mittels dieses Rads und einer Steuerung kann dann von dem Scheinwerfer Licht mit unterschiedlichen Spektralverteilungen abgegeben werden. Diese Lösung ist beispielsweise von sogenannten Beamern aus dem Hausgebrauch bekannt. Ein solches zusätzliches Rad ist besonders teuer, benötigt besonders viel Bauraum und eine besonders aufwendige Steuereinrichtung. Alle diese Nachteile können durch die Verwendung von wenigstens zwei Halbleiterlichtquellen und/oder zwei Konverterelementen vermieden werden. Entsprechend ist ein so gestalteter Scheinwerfer besonders kostengünstig und besonders bauraumgünstig.It has proven to be particularly advantageous if the light generating device comprises at least two semiconductor light sources for generating and / or two converter elements for emitting light with the different spectral distributions. In this way, light with different spectral distributions can be generated in a particularly simple and cost-effective manner. Otherwise, it is necessary, for example, to provide a movable wheel in the headlamp with attached differently colored apertures in the beam path of the light. By means of this wheel and a controller can then be issued by the headlight light with different spectral distributions. This solution is known for example from so-called beamers from home. Such an additional wheel is particularly expensive, requires a lot of space and a particularly complex control device. All of these disadvantages can be overcome by the use of at least two semiconductor light sources and / or two converter elements be avoided. Accordingly, such a designed headlight is particularly cost-effective and very space-saving.
Besonders vorteilhaft für die Erfindung ist es, wenn die Lichterzeugungseinrichtung einen Lichtleiter zum Transport des durch die wenigstens eine Halbleiterlichtquelle erzeugten Lichts zu dem wenigstens einen Konverterelement umfasst. Der Lichtleiter ermöglicht es also, dass der Strahlengang des von der wenigstens einen Halbleiterlichtquelle erzeugten Lichts nicht in grader Linie zu dem wenigstens einen Konverterelement führen muss. Vielmehr folgt das erzeugte Licht dem Verlauf des Lichtleiters. Dies ermöglicht eine freie Wahl der Position der wenigstens einen Halbleiterlichtquelle und damit einen besonders kompakten Scheinwerfer. Weiterhin bietet der Lichtleiter den Vorteil, dass weniger Licht durch Streuung an der Spiegelanordnung vorbei gelenkt wird. Insgesamt kann so die Etendue der Halbleiterlichtquelle auf die Etendue des Konverterelements und damit auch der Spiegelanordnung besonders gut angepasst werden. Damit ist die Effizienz des so gestalteten Scheinwerfers besonders hoch.It is particularly advantageous for the invention if the light generating device comprises a light guide for transporting the light generated by the at least one semiconductor light source to the at least one converter element. The light guide thus makes it possible that the beam path of the light generated by the at least one semiconductor light source does not have to lead in a straight line to the at least one converter element. Rather, the generated light follows the course of the light guide. This allows a free choice of the position of the at least one semiconductor light source and thus a particularly compact headlight. Furthermore, the light guide has the advantage that less light is directed by scattering on the mirror assembly over. Overall, the etendue of the semiconductor light source can thus be adapted particularly well to the etendue of the converter element and thus also of the mirror arrangement. Thus, the efficiency of the headlamp designed in this way is particularly high.
In weiterer vorteilhafter Ausgestaltung der Erfindung ist es vorgesehen, dass der Scheinwerfer eine optische Einrichtung umfasst, mittels welcher eine Leuchtdichteverteilung des vom Konverterelement abgegebenen Lichts so vorgeformt wird, dass das Licht beim Auftreffen auf die Spiegelanordnung in einem Randbereich der Spiegelanordnung eine geringere Leuchtdichte als in einem Mittenbereich der Spiegelanordnung aufweist. Beispielsweise soll die Leuchtdichte in dem Randbereich zehn Prozent geringer, insbesondere zwanzig Prozent geringer als in dem Mittenbereich der Spiegelanordnung sein. Durch das so vorgeformte Licht kann eine Lichtverteilung bereits vor dem Auftreffen auf die Spiegelanordnung an die spätere gewünschte Lichtverteilung des aus dem Scheinwerfer heraustretenden Lichtes angepasst werden. Beispielsweise entspricht die Lichtverteilung des auf die Spiegelanordnung auftreffenden Lichts bereits der gewünschten Lichtverteilung des Fernlichtes oder des Abblendlichtes. Das heißt, zur Einstellung dieser Lichtverteilung müssen einzelne Spiegelelemente nicht mehr so verstellt werden, dass Teile des Lichts in den Absorptionsbereich reflektiert werden. Das heißt ebenfalls, dass ein besonders großer Teil des von dem Konverterelement abgegebenen Lichts durch die Spiegelanordnung aus dem Scheinwerfer heraus reflektiert werden kann. Damit ist die Effizienz des Scheinwerfers besonders hoch.In a further advantageous embodiment of the invention, it is provided that the headlamp comprises an optical device by means of which a luminance distribution of the light emitted from the converter element is preformed so that the light when hitting the mirror assembly in a peripheral region of the mirror assembly, a lower luminance than in a Center region of the mirror assembly has. By way of example, the luminance in the edge region should be ten percent less, in particular twenty percent less, than in the center region of the mirror arrangement. As a result of the thus preformed light, a light distribution can be adapted to the later desired light distribution of the light emerging from the spotlight even before it hits the mirror arrangement. For example, the light distribution of the incident on the mirror assembly light already corresponds to the desired light distribution of the high beam or the low beam. That is, to adjust this light distribution individual mirror elements no longer need to be adjusted so that parts of the light are reflected in the absorption area. This also means that a particularly large part of the light emitted by the converter element light can be reflected by the mirror assembly out of the headlight. Thus, the efficiency of the headlamp is particularly high.
In weiterer vorteilhafter Ausgestaltung der Erfindung ist es vorgesehen, dass die optische Einrichtung wenigstens einen Reflektor und/oder eine optische Linse umfasst. Damit kann in besonders einfacher und besonders günstiger Weise das vom Konverterelement abgegebene Licht vorgeformt werden.In a further advantageous embodiment of the invention, it is provided that the optical device comprises at least one reflector and / or an optical lens. In this way, the light emitted by the converter element can be preformed in a particularly simple and particularly favorable manner.
Als ebenfalls vorteilhaft hat es sich gezeigt, wenn das Konverterelement dazu ausgelegt ist, mit einer ortsabhängigen Leuchtdichte Licht abzugeben. So kann das vom Konverterelement abgegebene Licht besonders einfach vorgeformt werden. Insbesondere kann so die optische Einrichtung zum Vorformen durch das Konverterelement gebildet sein, sodass ein besonders kompakter Scheinwerfer realisiert werden kann. Dafür gibt das Konverterelement Licht ab, das auf dem Randbereich der Spiegelanordnung mit einer geringen Leuchtdichte trifft als in dem Mittenbereich der Spiegelanordnung. Das Konverterelement kann beispielsweise eine ortsabhängige Leuchtdichte durch eine unterschiedliche, ortsabhängige Dicke erzeugen. Ein in seinem Randbereich dünneres Konverterelement kann dort beispielsweise Licht mit einer geringeren Leuchtdichte abgeben als in einem im Vergleich dickeren Mittenbereich.As also advantageous, it has been shown that the converter element is designed to emit light with a location-dependent luminance. Thus, the light emitted by the converter element light can be easily preformed. In particular, the optical device for preforming can thus be formed by the converter element, so that a particularly compact headlamp can be realized. For this, the converter element emits light which impinges on the edge region of the mirror arrangement with a low luminance than in the middle region of the mirror arrangement. The converter element can, for example, generate a location-dependent luminance by a different, location-dependent thickness. For example, a converter element that is thinner in its edge region can emit light with a lower luminance there than in a thicker center region in comparison.
Die vorstehend im Zusammenhang mit dem erfindungsgemäßen Scheinwerfer beschriebenen Vorteile und Ausgestaltungen gelten in eben solcher Weise für den erfindungsgemäßen Kraftwagen mit mindestens solch einem Scheinwerfer.The advantages and embodiments described above in connection with the headlight according to the invention apply in just the same way for the motor vehicle according to the invention with at least one such headlight.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigen in:
- Fig. 1
- eine schematische Draufsicht auf einen Kraftwagen mit zwei Scheinwerfern;
- Fig. 2
- eine schematische Darstellung eines der Scheinwerfer mit einer Lichterzeugungseinrichtung, einem Konverterelement und einer Spiegelanordnung;
- Fig. 3
- eine schematische Darstellung einer alternativen Ausführungsform des in
Fig. 2 gezeigten Scheinwerfers, wobei die Lichterzeugungseinrichtung einen Lichtleiter umfasst; - Fig. 4
- eine schematische Darstellung einer alternativen Ausführungsform des in
Fig. 2 gezeigten Scheinwerfers, wobei der Scheinwerfer eine optische Einrichtung umfasst, womit das vom Konverterelement abgegebene Licht vorgeformt wird; - Fig. 5
- einen Graphen, welcher einen schematisierten Verlauf Leuchtdichte des vorgeformten Lichtes bei einem Auftreffen auf die Spiegelanordnung zeigt; und
- Fig. 6
- eine schematische Darstellung einer alternativen Ausführungsform des in
Fig. 2 gezeigten Scheinwerfers, wobei die Lichterzeugungseinrichtung dazu ausgelegt ist, Licht mit wenigstens zwei unterschiedlichen Spektralverteilungen zu erzeugen.
- Fig. 1
- a schematic plan view of a motor vehicle with two headlights;
- Fig. 2
- a schematic representation of one of the headlamp with a light generating device, a converter element and a mirror assembly;
- Fig. 3
- a schematic representation of an alternative embodiment of the in
Fig. 2 the headlamp shown, wherein the light generating means comprises a light guide; - Fig. 4
- a schematic representation of an alternative embodiment of the in
Fig. 2 the headlamps shown, wherein the headlamp comprises an optical device, whereby the light emitted from the converter element light is preformed; - Fig. 5
- a graph showing a schematic curve luminance of the preformed light when hitting the mirror assembly; and
- Fig. 6
- a schematic representation of an alternative embodiment of the in
Fig. 2 The light generating device is designed to generate light with at least two different spectral distributions.
Dabei ist durch das mit den Linien 26 veranschaulichte Licht auch verdeutlicht, dass die Etendue des Konverterelements 24 kleiner oder gleich der Etendue der Spiegelanordnung 28 ist. Durch diese Abstimmung der Etendue kommt es zu besonders geringen Verlusten bei der Lichtübertragung. Die Lichterzeugungseinrichtung 18 umfasst also wenigstens eine Halbleiterlichtquelle 16 und wenigstens ein im Strahlengang des Scheinwerfers 12 angeordnetes und durch die Halbleiterlichtquelle 16 zum Leuchten anregbares Konverterelement 24, wobei das Konverterelement 24 zum Abstrahlen des von ihm abgegebenen Lichts auf die Spiegelanordnung 28 ausgelegt ist.It is also clarified by the light illustrated by the
Die Spiegelanordnung 28 besteht aus einer Vielzahl von Mikrospiegelelementen, welche zwischen wenigstens einer Reflektionsstellung, bei welcher das durch die Lichterzeugungseinrichtung 18 erzeugte Licht durch das Mikrospiegelelement aus dem Scheinwerfer 12 heraus reflektiert wird, und einer Absorberstellung, bei welcher das Licht größtenteils oder vollständig von dem Mikrospiegelsegment in einen Absorptionsbereich reflektiert wird, unabhängig voneinander verstellbar sind. Solch eine Spiegelanordnung 28 mit einer Vielzahl von Mikrospiegelelementen wird auch als Digital Micromirror Device oder kurz als DMD bezeichnet. Jedes Mikrospiegelelement lässt sich in seinem Winkel einzeln verstellen und besitzt dabei zwei stabile Endzustände, zwischen denen das Mikrospiegelelement innerhalb einer Sekunde beispielsweise bis zu 5000 Mal wechseln kann. Dabei kann eine Zeitdauer, für welche das Mikrospiegelelement in der Reflektionsstellung und/oder der Absorberstellung verbleibt, variiert werden. Im Betrieb schwingt das Mikrospiegelelement üblicherweise dauerhaft zwischen diesen Zuständen hin und her. Erst durch die Veränderung der Zeitdauer, für welche das Mikrospiegelelement in einer Stellung verbleibt, wird für einen Betrachter eine wahrgenommene Reflexionsstärke bei diesem Spiegelelement variiert. Dabei können für einen Betrachter Reflexionen aus dem Scheinwerfer 12 heraus mit kaum oder nicht mehr wahrnehmbaren Verlusten bis hin zu einer nicht mehr wahrnehmbaren Reflexion aus dem Scheinwerfer 12 heraus durch das Mikrospiegelelement erzeugt werden.The
Das durch die Spiegelanordnung 28 mit den Mikrospiegelelementen in Reflexionsstellung reflektierte Licht tritt über eine Linse 30, wie sie in
Eine beispielhafte so erzeugte Lichtverteilung 50 auf der Spiegelanordnung 28 ist in dem Graphen der
Zur Erzeugung von Licht mit wenigstens zwei unterschiedlichen Spektralverteilungen ist es alternativ auch möglich, dass zwei unterschiedliche Halbleiterlichtquellen 16 nur ein Konverterelement 24 zum Abgeben von Licht mit unterschiedlichen Spektralverteilungen anregen. Ebenso ist es alternativ möglich, dass nur eine Halbleiterlichtquelle 16 zwei unterschiedliche Konverterelemente 24 jeweils zum Abgeben von Licht mit einer unterschiedlichen Spektralverteilung anregt. Das Licht mit unterschiedlichen Spektralverteilungen muss dabei auch nicht auf unterschiedliche Bereiche der Spiegelanordnung 28 treffen, sondern kann alternativ auch auf die gesamte Spiegelanordnung 28 strahlen. Alle genannten Alternativen erfordern jedoch eine intelligente Steuerung der Lichterzeugungseinrichtung 18 und/oder der Spiegelanordnung 28, um beispielsweise die Teilbereiche 42 und 44 der Lichtverteilung 46 mit Licht mit jeweils unterschiedlicher Spektralverteilung auszuleuchten. Gegebenenfalls ist damit jedoch die Realisierung eines besonders kompakten Scheinwerfers 12 möglich.In order to generate light with at least two different spectral distributions, it is alternatively also possible for two different semiconductor
Durch die Verwendung von Halbleiterlichtquellen 16 ist die Lebensdauer des Scheinwerfers 12 besonders groß. Es erfolgt ein besonders geringer Wärmeeintrag auf die Spiegelanordnung 28, sodass diese besonders wenig erhitzt wird und eine besonders lange Lebensdauer und hohe Effizienz der Spiegelanordnung 28 gewährleistet ist. Es ist ein besonders geringer Kühlaufwand für den Scheinwerfer 12 notwendig, was insbesondere im Automobilbereich wichtig ist.By the use of
Claims (9)
dadurch gekennzeichnet, dass
die Lichterzeugungseinrichtung (18) wenigstens eine Halbleiterlichtquelle (16) und wenigstens ein im Strahlengang des Scheinwerfers (12) vor der Spiegelanordnung (28) angeordnetes und durch die Halbleiterlichtquelle (16) zum Leuchten anregbares Konverterelement (24) umfasst, wobei das Konverterelement (24) zum Abstrahlen des von ihm abgegebenen Lichts auf die Spiegelanordnung (28) ausgelegt ist, wobei der Scheinwerfer (12) eine optische Einrichtung (34) umfasst, womit eine Leuchtdichteverteilung des vom Konverterelement (24) abgegebenen Lichts so vorgeformt wird, dass das Licht beim Auftreffen auf die Spiegelanordnung (28) in einem Randbereich (40) der Spiegelanordnung (28) eine geringere Leuchtdichte als in einem Mittenbereich (38) der Spiegelanordnung (28) aufweist.A headlamp (12) for a motor vehicle (10), comprising a light generating device (18) and a mirror assembly (28) comprising a plurality of micromirror elements disposed between at least one reflection position at which the light generated by the light generating device (18) passes through the Micromirror element is reflected out of the headlight (12), and an absorber position in which the light is largely or completely reflected by the micromirror segment into an absorption region, are independently adjustable,
characterized in that
the light generating device (18) comprises at least one semiconductor light source (16) and at least one converter element (24) arranged in front of the mirror arrangement (28) in the beam path of the headlamp (12) and illuminatable by the semiconductor light source (16), the converter element (24) for emitting the light emitted by it onto the mirror arrangement (28), wherein the headlight (12) comprises an optical device (34), with which a luminance distribution of the light emitted by the converter element (24) is preformed such that the light impinges on the mirror assembly (28) in a peripheral region (40) of the mirror assembly (28) has a lower luminance than in a central region (38) of the mirror assembly (28).
dadurch gekennzeichnet, dass
die Etendue des Konverterelements (24) kleiner oder gleich der Etendue der Spiegelanordnung (28) ist.Headlamp (12) according to claim 1,
characterized in that
the etendue of the converter element (24) is less than or equal to the etendue of the mirror arrangement (28).
dadurch gekennzeichnet,
die wenigstens eine Halbleiterlichtquelle (16) eine Leuchtdiode oder einen Laser (20) umfasst.Headlamp (12) according to claim 1 or 2,
characterized
the at least one semiconductor light source (16) comprises a light-emitting diode or a laser (20).
dadurch gekennzeichnet, dass
die Lichterzeugungseinrichtung (18) dazu ausgelegt ist, Licht mit wenigstens zwei unterschiedlichen Spektralverteilungen zu erzeugen.Headlamp (12) according to one of the preceding claims,
characterized in that
the light generating device (18) is adapted to generate light with at least two different spectral distributions.
dadurch gekennzeichnet, dass
die Lichterzeugungseinrichtung (18) wenigstens zwei Halbleiterlichtquellen (16) zum Erzeugen und/oder zwei Konverterelemente (24) zum Abgeben von Licht mit den unterschiedlichen Spektralverteilungen umfasst.Headlamp (12) according to claim 4,
characterized in that
the light generating device (18) comprises at least two semiconductor light sources (16) for generating and / or two converter elements (24) for emitting light with the different spectral distributions.
dadurch gekennzeichnet, dass
die Lichterzeugungseinrichtung (18) einen Lichtleiter (32) zum Transport des durch die wenigstens eine Halbleiterlichtquelle (16) erzeugten Lichts zu dem wenigstens einen Konverterelement (24) umfasst.Headlamp (12) according to one of the preceding claims,
characterized in that
the light generating device (18) comprises a light guide (32) for transporting the light generated by the at least one semiconductor light source (16) to the at least one converter element (24).
dadurch gekennzeichnet, dass
die optische Einrichtung (34) wenigstens einen Reflektor und/oder eine optische Linse umfasst.Headlamp (12) according to claim 6,
characterized in that
the optical device (34) comprises at least one reflector and / or one optical lens.
dadurch gekennzeichnet, dass
das Konverterelement (24) dazu ausgelegt ist, mit einer ortsabhängigen Leuchtdichte Licht abzugeben.Headlamp (12) according to one of the preceding claims,
characterized in that
the converter element (24) is designed to emit light with a location-dependent luminance.
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CN109827144A (en) * | 2018-10-23 | 2019-05-31 | 华域视觉科技(上海)有限公司 | The optical system and car rear of the even illumination effect of both of which are realized for the same functional area of lamps and lanterns |
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JP2017162760A (en) * | 2016-03-11 | 2017-09-14 | スタンレー電気株式会社 | Headlight device for vehicle |
EP3819534A1 (en) | 2019-11-08 | 2021-05-12 | ZKW Group GmbH | Lighting device for a motor vehicle headlight |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN109827144A (en) * | 2018-10-23 | 2019-05-31 | 华域视觉科技(上海)有限公司 | The optical system and car rear of the even illumination effect of both of which are realized for the same functional area of lamps and lanterns |
CN109827144B (en) * | 2018-10-23 | 2023-09-26 | 华域视觉科技(上海)有限公司 | Optical system for realizing two uniform luminous effects in same functional area of lamp |
Also Published As
Publication number | Publication date |
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EP2993390B1 (en) | 2020-06-17 |
DE102014013202B3 (en) | 2016-02-04 |
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