• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A headlamp for vehicles, comprising at least one light source (1A, 1B) and one of its associated optical illumination optics, with a micromirror array (7) and imaging optics (9), the light source (1A, 1B) and the micromirror array (7) having a central Computing unit (4) with a light source drive (3) and an array drive (12) is assigned, the shaped light beams (2A, 2B) of the at least one light source (1A, 1B) are directed to the micromirror array (7) and that of this structured, reflected light beam via the imaging optics as a light image (10) is projected into the traffic space, wherein at least two light sources (1A, 1B) are provided, the light beams are directed to a common micromirror array (7) and the light beam reflected by this at least two areas (9kA, 9kB) are associated with an imaging optics (9).
    公开号:AT518286A1
    申请号:T50129/2016
    申请日:2016-02-24
    公开日:2017-09-15
    发明作者:Mayer Matthias；Mitterlehner Stefan
    申请人:Zkw Group Gmbh；
    IPC主号:
    专利说明:

    Headlights for vehicles
    The invention relates to a headlamp for vehicles, having at least one light source and one of these associated illumination optics, with a micromirror array and imaging optics, wherein the light source and the micromirror array is associated with a central processing unit with a light source drive and an array drive, the molded Light beams of the at least one light source are directed to the micromirror array and the structured by this, reflected light beam is projected via the imaging optics as a light image in the traffic area.
    The term "headlight" is to be understood in the context of the present invention not only a complete vehicle headlight but also a lighting unit, which may form part of a headlamp, for example, together with other lighting units.
    In the development of the current headlamp systems is increasingly the desire in the foreground to project a high-resolution as possible on the road, which can be quickly changed and adapted to the respective traffic, road and lighting conditions. The term "carriageway" is used here for a simplified representation, because of course it depends on the local conditions, whether a photo is actually on the roadway or extends beyond it.In principle, the photograph in the sense used here corresponds to a projection on a vertical Area in accordance with the relevant standards relating to automotive lighting technology.
    According to the aforementioned need, different headlamp systems have been developed, such as headlamps operating with scanning modulated laser beams, where the lighting starting point is at least one laser light source emitting a laser beam and associated with a laser driver used for powering and monitoring the laser emission or e.g. is used for temperature control and is also set up to modulate the intensity of the emitted laser beam. By "modulating" it is to be understood that the intensity of the laser light source can be changed, be it pulsed continuously or in the sense of switching on and off. It is essential that the light output can be changed dynamically analogously, depending on which angular position a mirror deflecting the laser beam is. In addition, there is still the possibility of switching on and off for a certain time, not to illuminate or hide defined places. The control of the laser light sources and the micromirror serving for beam deflection takes place via a computing unit, also called ECU for short (electronic or engine control unit). An example of a dynamic driving concept for forming an image by a scanning laser beam is described, for example, in Applicant's document AT 514633.
    Since such headlight systems are sometimes very complex and expensive, so there is a desire to create economical headlights, which nevertheless a high
    Have flexibility in terms of the generated light image, headlights are also known which use as light processing elements imagers, which have a large number of controllable pixel fields. Thus, DE 10 2013 215 374 A1 shows solutions in which the light from a light source is directed via a light guide element to an LCD imager to form an LCoS chip or a micromirror arrangement ("DMD"), and then onto the road via projection optics DMD is an acronym used for "Digital Micromirror Device", thus for a micromirror array or micromirror matrix. Such a micromirror array has very small dimensions, typically on the order of 10 mm. In a DMD micromirror actuators are arranged in a matrix, wherein each individual mirror element, which has, for example, an edge length of about 16 pm, by a certain angle, for example 20 °, tiltable, for example by electromagnetic or piezoelectric actuators. The end positions of a micromirror are referred to as ON state and OFF state, wherein ON state means that light from the micromirror passes through the imaging optics on the road, whereas in the OFF state, for example, it is directed to an absorber. Usually, it is also necessary to ensure absorption of those light rays which emanate from micromirrors in their non-"active" angular position and which are not projected onto the road via the imaging optics, using absorbers or absorber surfaces which absorb the otherwise harmful light rays and convert to heat.
    Each micromirror is individually adjustable in angle, whereby between the end positions within a second up to 5000 times can be changed. The number of mirrors corresponds to the resolution of the projected image, where a mirror can represent one or more pixels. Meanwhile, DMD chips with high resolutions in the megapixel range are available. The underlying technology for single-level variable mirrors is Micro-Electro-Mechanical Systems (MEMS) technology. While the DMD technology has two stable mirror states and the reflections can be adjusted by modulating between the two stable states, the "Analog Micromirror Device" (AMD) technology has the property that the individual mirrors can be set in variable mirror positions ,
    A headlight based on a micromirror array is described for example in DE 195 30 008 Al.
    In headlamps of motor vehicles one wants to realize in the most compact design often several light functions, such as in particular high beam, low beam, daytime running lights and cornering lights. Starting from a micromirror concept, in this case several micromirror arrays and several lenses are required for the imaging optics, which leads to high material and manufacturing costs.
    The design of a luminance pattern is carried out not only via the modulation of the primary light source but also via different array controls for different light distributions, such as high beam, low beam with or without asymmetry,
    Fade scenarios etc., wherein different array activations activate the individual micromirror elements depending on the desired light distribution.
    An object of the invention is to provide a headlamp, which is inexpensive to produce, but still has a great freedom of design with regard to the producible photographs.
    This object is achieved with a headlamp of the type mentioned, in which according to the invention at least two light sources are provided, the light beams are directed to a light sources common micromirror array and the light beam from this reflected at least two areas of a single imaging optics are assigned.
    Thanks to the invention, multiple light functions can be realized with a single micromirror array and a single imaging optic, which simplifies the overall design and makes it less expensive. The division into several light sources, which are usually power intensive, also facilitates cooling.
    It is furthermore advantageous if the shaped light beams of the light sources are directed onto the micromirror array at different angles of incidence.
    It is also advisable if the active mirror surface of the micromirror array is subdivided into partial regions which are assigned to the individual light sources.
    It may be expedient if each light source is assigned an illumination optical system located between it and the common micromirror array.
    On the other hand, it can be provided in the sense of a particularly compact design that two or more light sources are assigned a located between them and the common micromirror array illumination optics.
    For a cost-effective and space-saving design one arrives further, if the two areas of the single imaging optics are superimposed and formed of a body of optical glass / plastic lens-like.
    It may also be advantageous if the lens body is located in the front region of the headlamp and a partial optical system designed as a lens / lens system is arranged between the micromirror array and the lens body.
    Another advantageous embodiment is characterized in that a region of the single imaging optics is assigned to one of the plurality of light sources, whereas a further region of the imaging optics is assigned to two or more light sources.
    The invention together with further advantages is explained in more detail below by way of example embodiments, which are illustrated in the drawing. In this show
    1 for the invention essential components of a first embodiment of a headlamp with a micromirror array in a schematic representation,
    2 shows a second example embodiment of the invention in a perspective simplified representation with emphasis on the essential components of the invention,
    3 is an enlarged perspective view of a first illumination module of the embodiment of FIG. 2, but seen from a different angle,
    4 is an enlarged perspective view of a second illumination module of the embodiment of FIG. 2, but seen from a different angle,
    Fig. 5 is a front view of a DLP device used in the invention, for example, with a micromirror array and
    Fig. 6 is a reduced side view of the embodiment of FIG. 2 for illustrating the inclined against the horizontal optical axes of the two lighting modules.
    With reference to Fig. 1, an embodiment of the invention will now be explained in more detail. In particular, the important parts for a headlight according to the invention are shown, it being understood that a motor vehicle headlamp contains many other parts that allow its meaningful use in a motor vehicle, in particular a car or motorcycle. The lighting starting point of the headlamp in the present case are two light sources 1A and 1B, each of which emits a light beam 2A, 2B, and which is associated with a driver 3, said driver 3 for powering the light sources 1A and 1B and for monitoring or e.g. serves for temperature control and can also be configured to modulate the intensity of the radiated light beam. By "modulating" in the context of the present invention is meant that the intensity of the light source can be changed, whether continuous or pulsed, in the sense of switching on and off. In addition, there is the possibility of switching on and off for a certain time.
    As light sources are not only excited by laser radiation phosphorus elements in question, but it can also classic LEDs or high-current LEDs are used. It is also possible to use so-called "LED packages" which, in addition to a small, eg 1 to 2 mm 2, light-emitting area, also comprise the substrate on the LED board and its carrier plate In order to achieve the highest possible luminance on the DMD chip at the highest possible luminous flux, the drive signals of the light sources are denoted by Usa and Usb.
    The control 3 in turn receives signals from the central processing unit 4, which sensor signals Si ... si ... sn can be supplied. On the one hand, these signals may, for example, be switching commands for switching from high beam to low beam or, on the other hand, signals received by sensors, such as cameras, which detect the lighting conditions, environmental conditions and / or objects on the road. Also, the signals may originate from vehicle-vehicle communication information. The arithmetic unit 4 drawn here schematically as a block can be contained completely or partially in the headlight, wherein the arithmetic unit 4 is also assigned a memory unit 5.
    The light sources ΙΑ, 1B is followed by an optics 6A and 6B, whose formation depends inter alia on the type, number and spatial placement of the lamps used, such as laser diodes or LEDs as well as the required beam quality, and which should ensure, above all, the light emitted by the light source strikes the micromirrors of a micromirror array 7 as homogeneously as possible.
    The focused or shaped light beam 2 then passes to this micromirror array 7, on which a light image 8 is formed by corresponding position of the individual micromirrors, which can be projected via an imaging optics 9 as a light image 10 on a roadway 11 or more generally in the traffic area. In this embodiment, the imaging optics 9 has a lens body 9k with two regions 9kA and 9kB, which are arranged one above the other and which are shaped in a lens-like manner from optical glass or plastic. The arithmetic unit 4 supplies signals sa to an array drive 12, which drives the individual micromirrors of the array 7 in the manner corresponding to the desired light image. The individual micromirrors of the array 7 can be individually controlled with regard to the frequency, the phase and the deflection angle.
    FIG. 1 also shows an absorber 13 already mentioned above, which is generally important for a high quality of the image produced.
    The active mirror surface of the micromirror array 7 is divided here into subareas 7A and 7B, which are assigned to the two light sources ΙΑ, 1B. Furthermore, two regions 9A, 9B of the imaging optics 9 are associated with the light bundle reflected by the array 7 or its partial regions 7A, 7B, the light image 10 also being composed of two image regions 10A and 10B as a result.
    Referring now to Fig. 2, an exemplary embodiment of the invention will be described based on a headlamp according to Fig. 1, but with other components essential to the invention, with components that are not essential to the explanation of the invention and already shown in Fig. 1 omitted, as well as others Mechanical parts, such as fasteners, housings, cooling devices, power supplies and the like. More.
    In detail, one recognizes the first light source 1A with the first illumination optics 6A, to which reference is additionally made to the enlarged view of FIG. 3. The first light source 1A has an LED chip 14 with connection contacts 15 and with a light-emitting surface 16 of a high-power LED. The optical axis associated with the light source 1A or the associated illumination optics 6A is designated by the reference numeral 17A.
    In contrast to the light source 1A, the light source 1B is composed of three partial light sources 1B-1, 1B-2 and 1B-3. In the present embodiment, each of these partial light sources is structured as well as the light source 1A, so that a more detailed description can be dispensed with. Here and below, the same reference numerals are used for the same or similar parts.
    In order to combine the light emitted by the light-emitting surfaces 16 of the three partial light sources IB-1,1B-2 and 1B-3 to form a composite light beam 2B having substantially one optical axis 17B, a somewhat more complex illumination optical system 6B is required for these light sources, which here consisting of three partial lenses 6B-1, 6B-2, 6B-3 and a further, the partial lenses downstream lens 6B-4, which is apparent from Fig. 4 from a light source near lens combination. The illumination optics, which are not shown in detail and as such are not the subject of the invention, are preferably multi-stage optics which capture the Lambertian radiation characteristics and each have to form a light spot 18A, 18B, 18C of suitable geometry on the mirror array 7. In Fig. 4 schematically such spots are indicated.
    The array 7 consists of a matrix of micromirrors and is the optically essential area of a DMD component 19. Such DMD components contain, in addition to the micromirror array, subregions of the driver electronics and are equipped with effective cooling, as already mentioned, are on the DMD Chip very many, for example, (Texas Instruments DLP3000DMD) 608x684 micromirrors arranged on a surface with a diagonal of 7.62 mm, which can waste around + - 12 degrees. The drive of the micromirror is usually electrostatic.
    The imaging optics 9 is also designed as a multi-stage lens system and has in this variant a located at the front end of the headlight lens body 9k with two areas 9kA and 9kB, which are arranged one above the other and which are shaped like a lens of optical glass or plastic. In general, apart from this lens body 9k of the imaging optics 9, at least one partial optic 9f will also be arranged between the mirror array 7 and the lens body 9k. This sub-optic 9f is also generally designed as a lens which, for example, has different refractive powers in an upper and a lower region 9fA and 9fB.
    In the view of Fig. 5 it can be seen that the optically active surface of the mirror array 7, i. the mirror surface 7f is divided into partial regions 7A, 7B-1, 7B-2 and 7B-3, which, analogous to the embodiment according to FIG. 1, are assigned to the four light sources 1A, IB-1,1B-2 and 1B-3 are. Again, the light image generated here is projected by the illumination optics 9 on the road as a corresponding, consisting of four image areas existing photo. This has already been shown with reference to FIG. 1 and does not have to be represented again for the person skilled in the art. However, this recognizes that the overall structure despite the presence of four individual light sources thanks to the invention can be made relatively simple, compact and inexpensive.
    The side view of FIG. 6 is intended to illustrate the position of the optical axes of the above-described embodiment with respect to a horizontal plane s, whereupon the optical axis 17A of the light source 1A above and the optical axis 17B of the three partial light sources IB-1,1B-2 and 1B -3 composite light source 1B is below the plotted horizontal plane ε. It should be clear that the terms used "above" and "below" are not limiting, only in connection with the view shown and can for example refer to a normal position of use of a vehicle. The same applies mutatis mutandis to the terms "left", "right", "front", "rear", "side" etc.
    List of reference numerals 1A light source 1B light source 1B-1 partial light source 1B-2 partial light source 1B-3 partial light source 2A light beam 2B light beam 3 driving 4 arithmetic unit 5 storage unit 6A illumination optical system 6B illumination optical system 6B-1 partial lens 6B-2 partial lens 6B-3 partial lens 6B-4 lens 7 Micro mirror array 7A Subregion of 7 7B Subregion of 7 7B-1 Subregion of 7 7B-2 Subregion of 7 7B-3 Subregion of 7 7f Mirror surface 8 Illuminated image 9 Imaging optics 9f Suboptics 9fA Region 9fB Region 9k Lens body 9kA Region of 9k 9kB Region of 9k 10 10A image area 10B image area 11 roadway 12 array drive 13 absorber 14 LED chip 15 connection contacts 16 light emitting surface 17A optical axis 17B optical axis 18A light spot 18B light spot 18C light spot 19 DMD component si ... sn sensor signals sa signals
    Usa drive signal
    Usb control signal ε horizontal plane
    权利要求:
    Claims (8)
    [1]
    1. A headlamp for vehicles, comprising at least one light source (ΙΑ, IB, IB-1,1B-2,1B-3) and one of these associated optical illumination optics, with a micromirror array (7) and with an imaging optics (9, 9f), wherein the light source and the micromirror array is associated with a central processing unit (4) with a light source driver (3) and an array driver (12), the shaped light beams (2A, 2B) of the at least one light source are directed onto the micromirror array and structured therefrom , Reflected light beam on the imaging optics as a light image (10) is projected into the traffic space, characterized in that at least two light sources (ΙΑ, IB, IB-1, IB-2,1B-3) are provided, the light rays on a the light sources common micromirror array (7) are directed and at least two areas (9kA, 9kB) of an imaging optics (9, 9f) are associated with the light beam reflected by this.
    [2]
    2. Headlight according to claim 1, characterized in that the shaped light beams of the light sources (ΙΑ, IB, IB-1, IB-2,1B-3) are directed at different angles of incidence on the micromirror array (7).
    [3]
    3. Headlight according to claim 1 or 2, characterized in that the active mirror surface (7f) of the micromirror array (7) is divided into subregions, which are assigned to the individual light sources.
    [4]
    4. Headlight according to one of claims 1 to 3, characterized in that each light source (ΙΑ, 1B) is assigned a between this and the common micromirror array (7) located illumination optics (6A, 6B).
    [5]
    5. Headlight according to one of claims 1 to 3, characterized in that two or more light sources (IB-1, IB-2,1B-3) is assigned between these and the common micromirror array (7) located illumination optical system (6B).
    [6]
    6. Headlight according to one of claims 1 to 5, characterized in that the two regions (9kA, 9kB) of the imaging optics (9) are superimposed and formed from a lens body (9k) of optical glass / plastic lens-like.
    [7]
    7. Headlight according to one of claims 1 to 6, characterized in that the lens body (9k) is located in the front region of the headlamp and between the micromirror array (7) and the lens body designed as a lens / lens system sub-optics (9f) is arranged.
    [8]
    8. Headlight according to one of claims 1 to 7, characterized in that a region (9kA) of the imaging optics (9) one (1A) of the plurality of light sources is assigned, whereas another area (9kB) of the imaging optics two or more light sources (1B -1, IB-2,1B-3).
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50129/2016A|AT518286B1|2016-02-24|2016-02-24|Headlights for vehicles|ATA50129/2016A| AT518286B1|2016-02-24|2016-02-24|Headlights for vehicles|
    CN201780012983.2A| CN109073187B|2016-02-24|2017-02-01|Head lamp for vehicle|
    JP2018561292A| JP6791988B2|2016-02-24|2017-02-01|Light projector for vehicles|
    EP17704374.2A| EP3420269B1|2016-02-24|2017-02-01|Headlight for vehicles|
    PCT/AT2017/060013| WO2017143371A1|2016-02-24|2017-02-01|Headlight for vehicles|
    KR1020187027706A| KR102117332B1|2016-02-24|2017-02-01|Automotive headlights|
    US16/106,235| US10598330B2|2016-02-24|2018-08-21|Headlight for vehicles|
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