• 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:
    To determine a zero position of the actuator (14) of a headlight range control of a light module (10) in a headlight for vehicles, outgoing light from the light source (1) is directed onto an absorber surface (12). The absorber surface (12) has an opening through which light passes as a limited light beam (17). By means of the actuator (14), the light module (10) is pivoted with respect to its angular position, wherein by means of a photosensitive sensor (15), which is arranged behind the absorber surface (12), an intensity of the passing through the opening light beam (17) is detected.
    公开号:AT518068A4
    申请号:T50075/2016
    申请日:2016-02-05
    公开日:2017-07-15
    发明作者:Mayer Peter；Mitterlehner Thomas
    申请人:Zkw Group Gmbh；
    IPC主号:
    专利说明:

    Method for determining the zero position of a mirror device in one
    Vehicle headlights
    The invention relates to a headlamp for vehicles, such as cars, having a light module (or more) with at least one light source and at least one mirror device, wherein the light module is associated with an actuator by means of which the light module for setting a pre-set for operation angular position is pivotable , The invention also relates to a method for determining a zero position of an angular position of the light module in a headlight of the type mentioned.
    Headlamps with mirrors to redirect the light and to form a particular desired light image are well known. Such a mirror device may be a simple mirror, which may be flat or curved, or may be realized as a micromirror array (so-called DLP, for Digital Light Processor). In many applications, the mirror devices are combined with the light source and optionally associated optical components in a light module, and the light module is pivotally mounted to select a desired operating setting, for example, a headlight range control. The setting of a desired angular position by pivoting the mirror is achieved by an actuator of a known type. In this case, the problem often arises that for the reliable determination of the angular position of the mirror, a zero position of the actuator is assumed.
    In conventional solutions, the zero position of the drive motor of the mirror is determined by the fact that the motor is moved against a stop or driven over a reference position, which is queried by means of a mechanical or Hall effect sensor. However, this only allows a determination of the motor position where additional geometrical influences on the beam path, such as the beam trajectory. Tolerances of the positioning of the optical components or warping of the support frame, not be detected.
    It is therefore an object of the invention to overcome the above-mentioned disadvantages and to enable a reliable detection of the zero position.
    This object is achieved according to the invention for a headlight of the type mentioned by an absorber surface having an opening, wherein light emitted from the light source, which falls on the absorber surface, is absorbed there, with the exception of light that passes through the opening as a limited light beam, and a photosensitive sensor which is in line of sight from the mirror means behind the aperture and which is arranged to detect the light beam passing through the aperture for detecting a zero position of the angular position of the light module. By "line of sight" is here understood an uninterrupted propagation path of a fictive light beam, even taking into account any optical elements such as mirrors or lenses that allow the visual line to deviate from a simple straight line by reflection or refraction, without, however, leading to appreciable impairments of the light signal ,
    Due to this solution, light can pass through the opening in the absorber surface as a limited light beam; by means of the actuator, the light module is pivoted with respect to the angular position, wherein by means of the photosensitive sensor, an intensity of the passing through the opening light beam is detected. This solution according to the invention enables a reliable calibration or detection of a zero position of the drive motor of the module adjustment. Another advantage is the small number of components that are provided beyond the actual operating components of the headlamp, since the light source is additionally used for the reference run (dual use of the light source).
    In a particularly expedient application, the light module for carrying out a headlight range adjustment (at least) about a horizontal axis pivoted.
    According to an advantageous development of the invention, the mirror device can be a micromirror array; by this, during the detection of the zero position, light irradiated from the light source can be directed onto the absorber surface by at least a part of the micromirror array.
    In order to reliably enable the measurement depending on the angular position, an arrangement may be advantageous in which the absorber surface is fixed relative to the pivotable light module, e.g. as a component of the light module, whereas the sensor is arranged independently of the light module, for example, fixedly mounted in the headlight outside the light module. Conversely, in a variant, the sensor could be relatively fixed to the pivotable light module, while the absorber surface could be independent of the light module, e.g. fixed in the headlight, is arranged.
    The light beam passing through the opening of the absorber surface can impinge directly on the photosensitive sensor or be indirectly directed to it, namely by an optically effective deflection device. This diverter can e.g. a suitably arranged deflection mirror, or it may be a suitably arranged between the opening of the absorber surface and the photosensitive sensor light guide. The deflection device can be positioned within the light module-in particular as a component therein-or outside the light module, for example in a defined position relative to the sensor.
    The light module may e.g. be held in a support frame of the headlamp, wherein the support frame has the actuator, by means of which the light module is pivotable for setting a preset for the operation angular position. After the light source and the mirror device in the light passage is usually provided an imaging optics, which is preferably part of the light module, but may also be mounted independently of the light module in the headlight.
    According to a variant of the invention, the mirror device may be a mirror which is arranged in the beam path between the light source and the micromirror array; Alternatively, the mirror may be arranged downstream of the micromirror array in the beam path.
    According to the invention, in a method for determining a zero position of an angular position of a light module in a headlight according to the invention, light emitted by the light source is directed onto the absorber surface; the actuator can then pivot the light module with respect to its angular position, wherein by means of the photosensitive sensor, an intensity of the passing through the opening light beam is detected.
    In this case, the zero position is detected, for example, at that angular position at which a maximum of the light intensity is detected; in other words, due to the angle-dependent measurement, the zero position is determined for that value of the angle at which the maximum of the light intensity occurs (or alternatively another excellent point of the angle-dependent progression of the light intensity).
    The invention together with further details and advantages will be explained in more detail below with reference to exemplary embodiments, which are shown in the accompanying drawings. The embodiments are intended to illustrate the invention and are not to be construed as limiting the invention. The drawings show in schematic form:
    Fig. 1 shows a motor vehicle headlamp with a micromirror array and a
    Measuring device for referencing the micromirror array according to one embodiment of the invention,
    Fig. 2 is an example of a photograph that can be produced with a headlamp of Fig. 1;
    Fig. 3 is a view of the micromirror array of the headlamp of Fig. 1;
    Fig. 4 is a view of the light absorbing surface of an absorber in the
    Headlight of Fig. 1;
    5 shows an example of a measuring signal of the measuring device as a function of
    Angular position of the micromirror array; and
    Fig. 6 and 7 deflection means which indirectly transmit the light to be measured to the sensor.
    In Fig. 1, a first embodiment of the invention is explained in 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. Lighting starting point of the headlamp is a light source 1, which emits a light beam 2, and which is associated with a driver 3, said driver 3 for powering the light source 1 and for monitoring or e.g. is used for temperature control and also for modulating the intensity of the radiated
    Light beam can be set up. 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. In this case, LED light sources are preferably used, which can be operated with high currents - one speaks of "high power LEDs" - to achieve the highest possible luminous flux and thus the highest possible luminance on a DMD chip.
    The driver 3, in turn, receives signals from the central control unit 4. These can be supplied with signals of various types, e.g. Switching commands to switch from high beam to dipped beam or other signals that are recorded, for example, 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 here schematically drawn as a block control unit 4 can be arranged outside of the headlight or completely or partially contained in the headlight.
    The light source 1 may be subordinate to an optic 5, whose training 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, that of the Light emitted light hits as homogeneously as possible on the micromirrors of a micromirror array 6.
    Fig. 3 shows a symbolic representation of the micromirror array 6 in a view of the surface formed by the plurality of micromirrors of the array. As is known, the individual micromirrors of the micromirror array 6 can be tilted with respect to their angular position relative to the incident light beam 2.
    With reference to FIG. 1, the focused or shaped light beam 2 now reaches this micromirror array 6, on which a luminous image 7 is formed by a corresponding position of the individual micromirrors. The light image 7 can then be projected via an imaging optics 8 as a light image B on a street 9. For example, the light image B can be visualized and measured for control purposes by means of a temporarily erected screen 9 '; an example of such a light image B is in
    Fig. 2 shown. The control unit 4 supplies signals si to an array drive 11, which drives the individual micromirrors of the array 6 in the manner corresponding to the desired light image B. The individual micromirrors of the array 6 can be individually controlled with regard to the frequency, the phase and the deflection angle.
    The light parts, which are not directed by the micromirrors of the array 6 to the imaging optics 8 (and further out through them), are directed onto an absorber 12, which has a light-absorbing surface facing the mirror. The absorber 12 has the function to absorb the light kept away from the array 6, which in particular unwanted reflections in the headlight are suppressed. The components of the beam path from the light source 1 via the array 6 to the imaging optics 8 and the absorber 12 are advantageously arranged in a light module 10 by these components are firmly attached, whereby for a defined positional relationship of these components - in particular the light source 1, optics. 5 , the array 6 and absorber 12 - is ensured. Often, but not necessarily, the imaging optics 8 in the light module 10 is included. In addition, as shown in the exemplary embodiment, the light module 10 can be mounted in a support frame 13, which holds the light module 10 or its components and can be pivoted vertically as a whole. The support frame 13 or the light module 10 is held by an adjustable holder 14, preferably by means of the actuator of the holder 14 at least pivotable about a horizontal axis. Thus, the light module 10 is adjustable in its vertical orientation by means of the holder 14; This bracket is used in this way as a headlamp leveling of the headlamp. The actuator of the bracket 14 may e.g. be designed as a stepper motor.
    The support frame 13 forms an adjustable with the adjustable holder 14 "interface" to the headlamp including the sensor 15. The support frame 13 can be adapted to the respective headlights, if necessary, he can also hold other modules that can then be referenced with Therefore, it is generally necessary to adapt the mounting / adjustment unit 14 to the current situation in the headlight in order to cope with the respective geometry and, where appropriate, the forces that occur.As a result, it is usually necessary to adjust the vertical orientation of the light module 10, thus the position of the drive of the holder 14. This is usually necessary, in particular in the case of a drive implemented by a stepper motor, especially since a
    Stepper motor is often driven only incrementally. For calibration, a reference run is performed, by which the positioning of the holder - or the headlight range control - is determined. In this way, a zero position can be determined or determined, and subsequently, starting from this position, the deflections of the drive or travel steps of the stepping motor are counted to detect the current position of the drive / stepping motor.
    According to the invention, the measurement of the position in the reference run takes place with the aid of a photosensitive sensor 15, which is arranged behind the absorber 12 as viewed from the micromirror array 6 and is mounted in such a way that its position is not affected by an adjustment of the light module 10 by the actuator 14 becomes. For example, the sensor 15 is mounted independently of the support frame 13 in the headlight, preferably outside the support frame. In the absorber 12, an opening 16 (Fig. 4) is formed, through which a part of the light, which is directed to the absorber, can pass in the form of a limited light beam 17. This light is received by the sensor 15, e.g. is designed as a photodiode, detected, and a corresponding detection signal s3 is passed to the control unit 4, in which the evaluation and detection of the zero position is performed. The zero position is detected by the fact that the light passing through the sensor 15 hits, while in the other positions of the drive, the sensor detects no (or only small) light incidence.
    Referring to Fig. 4, the opening 16 in the absorber 12, more specifically in its light absorbing surface, is formed at a position corresponding to the position of the drive in the zero position to allow the definition of the zero position. The opening 16 is shaped, for example, circular or square. The diameter d of the opening 16 is chosen to be large enough to pass a sufficient luminous flux for the detection by the sensor. As far as this is satisfied, however, a small diameter d is preferred, for example less than 1 mm; This is useful to keep the beam 17 tight, so that a well-visible with the sensor light-dark transition can be achieved during the reference run.
    The reference run is performed and monitored by the control unit 4. During a reference run, the micromirror array 6 is switched to dark so that all the light is directed onto the absorber surface. Thus, light passes through the opening 16 and is detected by the sensor 15. 5 shows an example of a detection signal F as a function of the angular position φ of the array 6. The holder pivots the array 6 until the sensor 15 detects a flank of the signal F. The position of the edge or the center position of the tip is then stored as a reference value and used for the further adjustment operations as a zero position.
    With reference to FIGS. 6 and 7, for reasons of space, for example, it may not be possible or expedient to place the sensor 15 in the line of sight of the opening 16. In such a case, a deflection optics (deflecting device) can guide the light 17 passing through the opening to the sensor 15. The deflection optics may e.g. be realized with reflector surfaces, such as a mirror 18 and / or optical fibers 19. Of course, other embodiments of the deflection device are possible, which may include deflecting mirrors, optical fibers, and / or other optical components.
    The inventive arrangement of the sensor enables a reliable calibration or detection of a zero position of the drive motor mirror adjustment, with a small number of components that must be recorded for the detection of the zero position. In this case, in particular the double use of the light source is to be emphasized, since it is additionally used for the reference run in addition to its actual function.
    A further advantage is that the reference run can be performed faster because the paths of the drive motor to be traveled are smaller than in conventional solutions.
    By determining the angle adjustment, instead of the position of the motor as in conventional solutions, the invention makes it possible to dispense with additional sensors on the side of the drive motor. In addition, the invention permits the implicit consideration of manufacturing tolerances such as e.g. a distortion of the support frame, which had to be considered separately in conventional solutions.
    权利要求:
    Claims (10)
    [1]
    claims
    1. Headlamp for vehicles, comprising at least one light module (10) with at least one light source (1) and at least one mirror device (6), wherein the light module (10) is associated with an actuator (14), by means of which the light module (10) Setting an operating angle preset angular position is pivotable, characterized by an absorber surface (12) having an opening, wherein light emitted from the light source (1), which is incident on the absorber surface (12) is absorbed there, with the exception of light, the through the opening (16) as a limited light beam (17), and a photosensitive sensor (15) which is in sight line from the mirror means (6) behind the opening (16) and which detects the light beam passing through the opening (17 ) is arranged to detect a zero position of the angular position of the light module (10).
    [2]
    2. Headlight according to claim 1, characterized in that the light module (10) for performing a headlight range adjustment is pivotable about a horizontal axis.
    [3]
    3. Headlamp according to claim 1 or 2, characterized in that the mirror device is a micromirror array (6), wherein the micromirror array (6) is arranged so that during the detection of the zero position light, which is radiated by the light source (1), is directed by at least a portion of the micromirror array (6) on the absorber surface (12).
    [4]
    4. Headlight according to one of the preceding claims, characterized in that the absorber surface (12) is arranged fixed relative to the pivotable light module, preferably as a component of the light module (10), whereas the sensor (15) of the light module (10) arranged independently is preferably fixedly mounted in the headlight outside the light module (10).
    [5]
    5. Headlamp according to claim 4, characterized by an optically effective deflecting device (18,19) which is adapted to the through the opening (16) of the absorber surface (12) through-praying Lichtsbahl (17) to the photosensitive sensor (15) to direct , wherein the deflection device is preferably arranged outside of the light module.
    [6]
    6. Headlight according to claim 5, characterized in that the optically effective deflection device is a deflecting mirror (18).
    [7]
    7. Headlight according to claim 5, characterized in that the optically effective deflection means between the opening (16) and the photosensitive sensor (15) located light guide (19).
    [8]
    8. Headlight according to one of the preceding claims, characterized in that the light module (10) is held in a support frame (13) of the headlamp, wherein the support frame (13) has the actuator (14), by means of which the light module (10) for Adjusting a preset for the operation angular position is pivotable
    [9]
    9. A method for determining a zero position of an angular position of a light module (10) in a headlamp according to one of the preceding claims, characterized in that from the light source (1) outgoing light on the absorber surface (12) is passed and the actuator (14) Light module (10) pivoted with respect to its angular position, wherein by means of the photosensitive sensor (15) an intensity of the passing through the opening light beam (17) is detected.
    [10]
    10. The method according to claim 9, characterized in that the zero position at that angular position of the light module (10) is detected, in which a maximum of the light intensity is detected.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0133576A2|1983-08-16|1985-02-27|Ichikoh Industries Limited|Device for adjusting the inclination of the light axis of a headlamp for motor vehicles|
    EP1759920A1|2005-08-31|2007-03-07|Hella KG Hueck & Co.|Device for the determination of the zero position of a tiltable vehicle's headlamp|
    WO2012041442A1|2010-10-01|2012-04-05|Robert Bosch Gmbh|Optical angle sensor|
    DE2809369A1|1978-03-04|1979-09-13|Bosch Gmbh Robert|DEVICE FOR SWIVELING THE HEADLIGHTS OF A VEHICLE|
    DE19530008B4|1995-08-16|2005-02-03|Automotive Lighting Reutlingen Gmbh|Illumination device for vehicles with a reflective deflection device|
    DE19737653A1|1997-08-29|1999-03-04|Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh|Lighting device for vehicles and operating method for such a lighting device|
    JP4169396B2|1998-07-14|2008-10-22|オリンパス株式会社|Scanning laser microscope|
    US6781691B2|2001-02-02|2004-08-24|Tidal Photonics, Inc.|Apparatus and methods relating to wavelength conditioning of illumination|
    JP3982412B2|2002-12-27|2007-09-26|市光工業株式会社|Digital lighting device for vehicles|
    US6969183B2|2002-12-27|2005-11-29|Ichikoh Industries, Ltd.|Digital lighting apparatus for vehicle, controller for digital lighting apparatus, and control program for digital lighting apparatus|
    JP4928372B2|2007-07-12|2012-05-09|株式会社小糸製作所|Vehicle lighting device|
    EP2305514B1|2008-06-04|2019-04-10|Koito Manufacturing Co., Ltd.|Headlight aiming system|
    JP2012133167A|2010-12-22|2012-07-12|Yokogawa Electric Corp|Confocal optical scanner|
    JP5779028B2|2011-07-26|2015-09-16|株式会社小糸製作所|Light distribution control means for headlamp|
    FR3009370B1|2013-07-30|2018-06-15|Valeo Vision|LIGHTING SYSTEM WITH IMPROVED SCAN MEANS|
    DE102014001201B4|2014-01-29|2021-10-28|Audi Ag|Lighting device for a motor vehicle with two types of lighting devices|
    CN109945126B|2014-07-08|2022-03-04|三菱电机株式会社|Headlight module|
    JP2016162682A|2015-03-04|2016-09-05|株式会社デンソー|Light emitting device|
    DE102015212758B3|2015-07-08|2016-12-01|Volkswagen Aktiengesellschaft|Projection optics and projection unit for a motor vehicle|
    AT518068B1|2016-02-05|2017-07-15|Zkw Group Gmbh|A vehicle headlamp and method for determining the zero position of a mirror device in the vehicle headlamp|
    KR101836845B1|2016-07-04|2018-03-09|엘지전자 주식회사|Lighting device for vehicle|AT518068B1|2016-02-05|2017-07-15|Zkw Group Gmbh|A vehicle headlamp and method for determining the zero position of a mirror device in the vehicle headlamp|
    FR3073928B1|2017-11-17|2020-11-13|Valeo Vision|LIGHTING MODULE FOR AUTOMOTIVE VEHICLE PROJECTOR|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50075/2016A|AT518068B1|2016-02-05|2016-02-05|A vehicle headlamp and method for determining the zero position of a mirror device in the vehicle headlamp|ATA50075/2016A| AT518068B1|2016-02-05|2016-02-05|A vehicle headlamp and method for determining the zero position of a mirror device in the vehicle headlamp|
    ES17702756T| ES2858086T3|2016-02-05|2017-01-24|Procedure for determining the zero position of a mirror device in a vehicle headlight|
    PCT/AT2017/060008| WO2017132714A1|2016-02-05|2017-01-24|Method for determining the zero position of a mirror mechanism in a vehicle headlight|
    EP17702756.2A| EP3247935B1|2016-02-05|2017-01-24|Method for determining the zero position of a mirror mechanism in a vehicle headlight|
    CN201780000553.9A| CN107278250B|2016-02-05|2017-01-24|Method for determining the zero position of a mirror device in a vehicle headlight|
    JP2017545564A| JP6375453B2|2016-02-05|2017-01-24|Method for determining the zero position of a mirror device in a vehicle light irradiator|
    US15/544,070| US10018319B2|2016-02-05|2017-01-24|Method for determining the zero position of a mirror device of a vehicle headlight|
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