• 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 vehicle headlamp having a housing (1) and modulatable light or IR radiation sources (4) arranged inside the housing (1), and an interface (2) for connection to an external vehicle processor (3), which according to the invention is proposed to be located within the vehicle Housing (1) an image sensor (6) for detecting depth information from the backscattered radiation of the light or IR radiation sources (4) is arranged, and connected to the image sensor (6) processor (8), wherein the processor (8) on the one hand via a Modulator (9) is connected to at least a part of the inside of the housing (1) arranged modulable light or IR radiation sources (4), and on the other hand via a bidirectional data connection (10) to the interface (2). In this way, it is possible to use ToF technology suitable for everyday use and suitable for mass production by optimizing its integration into conventional vehicle technology.
    公开号:AT514218A1
    申请号:T376/2013
    申请日:2013-05-06
    公开日:2014-11-15
    发明作者:
    申请人:Bluetechnix Gmbh；
    IPC主号:
    专利说明:

    »· · · · · · · · · · · · · T · ι · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ··· • J · · · · · ··· ···· 1745745
    The invention relates to a vehicle headlight with a housing and disposed within the housing, modulated light or IR radiation sources, as well as an interface for connection to an external vehicle processor, according to the preamble of claim 1.
    As vehicle headlights are here and below understood all radiating in the outer region of a vehicle light or IR radiation sources, so both headlights and taillights, which are used for illumination or signaling. For this purpose, vehicle headlamps are increasingly used in which arranged on module supports arranged matrix-like LEDs (Light Emitting Diodes) as light or IR radiation sources. If the LEDs used in this case are also operated with AFL (adaptive forward lighting) technology, the illumination profile of the vehicle headlight can be varied, whereby the LED modules are dimmed to different degrees depending on the desired illumination profile by means of a vehicle processor. Changes in the Ausleuchtprofils the vehicle headlights while driving, so when cornering, changing weather conditions or detected objects on the roadside, are also referred to as dynamic Ausleuchtpröfile. The desired illumination profile can be selected, for example, by means of corresponding sensors which determine information from the vehicle environment and control the vehicle headlights accordingly via the vehicle processor.
    For example, the LED module for the headlamp blends white light with a combination of several wavelengths. These wavelengths are generated partly indirectly by blue LEDs made of gallium nitride (GaNN) and a converter layer and partly directly by yellow LEDs made of aluminum indium gallium phosphide (AlInGaP). The LED modules for taillights and stoplights generate the wavelengths around 700 nm by red LEDs made of semiconductors, such as aluminum gallium arsenide (AlGaAs), gallium arsenide phosphide (GaAsP), aluminum gallium indium phosphide (AlGalnP) or gallium phosphide (GaP). The beam shaping of the LED modules is usually supported by plastic lenses and mirror reflectors.
    Furthermore, attempts have been made to provide vehicles with so-called " time of flight " To equip (Toi) cameras. ToF cameras are cameras that not only capture a 2D image, but also measure depth information for each capture pixel. Depth information is understood to mean information about the distances between the individual objects of a scene and the ToF camera. ToF cameras are also referred to as active cameras because they are equipped with their own light source, which is also referred to below as the ToF light source. The light emitted by this light source is reflected on the objects of a scene to be recorded and thereby passes as a backscatter counter in the detection range of the image sensor of the camera. The 2/11 '··· ··· ··· ···· · · · · ·. • • 2 * • • • • • • • • * • • • • • • • • • • • • • • •
    Depth information is determined from the reflected light via transit time or phase difference measurements.
    The light sources are usually LEDs that emit modulated light. The light is typically OOK (on-off keying) modulated (e.g., 20MHz) using a Toah modulator in the megahertz range to radiate into the field of view of its own image sensor. The reflected light components (photons) are picked up by the camera sensor and used to calculate the distance of the reflective object. This depth data will be available next to the grayscale image for applications. In most applications, infrared LEDs or laser diodes are currently used as lighting. At present, PMD image sensors with 352x288 pixels (Q VGA resolution) are usually used as image sensors. The image sensors must be subjected to the shutter principle with the Qok signal, which is also used synchronously to trigger the ToF light source. The image sensor subsequently supplies an analogue difference signal, from which the depth information per pixel can be calculated by using several sequential image recordings in the ToF camera processor. The power loss of conventional ToF cameras is in the range of 10W to 100W and is largely determined by the power of the ToF light source and the Änsteuersignal.
    However, an application of the ToF technology in vehicle technology that is suitable for everyday use and suitable for mass production could not yet be accomplished. On the one hand, technical difficulties arise because the light source required for the ToF camera causes a considerable increase in the power requirement for the power supply of the vehicle as well as the corresponding cabling effort. Furthermore, for practical reasons, the image sensor and the light source of the ToF camera are arranged separately from one another on the vehicle, for example by placing the light source in the area of the radiator grille so as not to dazzle oncoming vehicle drivers, and the image sensor in the area of the windscreen. This, however, adds extra cabling overhead to the ToF system itself because the high frequency modulation signal can not be transmitted to the ToF light source via the existing vehicle interface. The cabling and the transmission electronics are also subject to the strict EMC guidelines of the vehicle electronics. In addition, the separate mounting position of the two parts further limits the purpose of use because of low overlap of the viewing areas.
    On the other hand, practical problems arise, for example due to contamination of a Tof light source arranged in the region of the radiator grille, as well as logistical problems in the development, production and maintenance of the vehicle, since several different vehicle areas - such as the radiator grille and hood, interior and windscreen, as well as tailgate or bumper - are affected and 3/11 • · · · · 3 * · · ·. , * ·. 3 .. ... • »·». , , Thus, different fields of business of the manufacturer are involved in the integration and release of the respective components.
    It is therefore the object of the invention to overcome these difficulties and to enable a daily gestliehe and suitable for mass production application of ToF technology in vehicle technology. In particular, an integration of ToF technology in the conventional Fahrzeugteehnik is facilitated and their applicability can be achieved even with dynamic Ausleuchtprofilen the vehicle headlights.
    These objects are achieved by the features of claim 1. Claim 1 relates to a vehicle headlight with a housing and disposed within the housing, modulable light or IR-Strahlqellen, and an interface for connection to an external vehicle processor. In this case, it is proposed according to the invention that an image sensor for detecting depth information from the backscatter radiation of the light or IR radiation sources is arranged within the housing, and a processor connected to the image sensor, wherein the processor on the one hand via a modulator with at least a part of within the Housing arranged, modulated light or IR radiation sources is connected, and on the other hand connected via a bidirectional data connection to the interface.
    According to the invention thus the light or IR radiation sources of
    Vehicle headlamps used as light sources for determining depth information by the Modulierbarkeit. the light or IR radiation sources known
    Vehicle LED-based headlamps is exploited, although the modulation is made in a conventional manner at a lower frequency. Suitable for the headlights and flashing lights in particular yellow LEDs with wavelengths of the yellow Liehtanteils of about 600nm and for taillights and Bremsleuehten red LEDs with wavelengths of the red light component of about 650nm. However, it has been shown that due to the increasingly dynamically designed illumination profile of the vehicle headlamps, the backscatter radiation and in particular the direction of the maximum backscatter radiation also changes. The driver reacts to these changes
    Illuminated profiles by appropriate head movements to micke in the direction of the maximum backscatter radiation. An e.g. The ToF image sensor arranged in the area of the windshield would also have to follow these changes in direction in order to receive sufficient exposure intensities by the backscattered light and to determine the depth information of objects in the currently illuminated area.
    Therefore, according to the invention, the arrangement of the image sensor in the housing of the vehicle headlight, and thus in spatial proximity of the light or IR radiation sources proposed. The image sensor is thus also with changed illumination profiles of the 4/11
    Vehicle headlamps always in the range of the maximum backscatter radiation in the vicinity of the optical axis, which is defined by the straight-line connection of the vehicle headlamp with the respective illuminated object. The arrangement of the image sensor in the housing of the vehicle overhead projector also has the advantage that it benefits from the increasingly often provided own cleaning systems for vehicle headlights.
    Furthermore, a separate processor is provided, which takes over the function of a ToF camera processor and is connected on the one hand with a modulator for the corresponding high-frequency modulation of the light or IR radiation sources of the vehicle headlight, and on the other hand via a bidirectional data connection to the interface to the external vehicle electronics , In this way, on the one hand, the transmission path of the high-frequency modulation signal can be kept short, without affecting the other vehicle electronics, and on the other control and regulatory tasks of illumination and signaling adopted by the external vehicle processor and matched with the needs of ToF Tiefeninformationsertrnittlung. For this purpose, the processor serving as a ToF camera processor can exchange calculated data via the interface with the external vehicle processor, take over control information for changing the illumination profile from the external vehicle processor in real time and change the illumination profile of the vehicle headlight in real time, taking into account the requirements of the ToF image sensor.
    If the light or IR radiation sources are arranged on a movable module carrier, it is predicted that the image sensor is arranged on the module carrier or on an image sensor carrier which is jointly controlled with the module carrier. In this way, the image sensor carries out pivoting movements of the module carrier and is thereby always positioned perpendicular to the optical axis. Preferably, the time-of -ight camera processor is connected to the module carrier and the image sensor carrier, so that the ToF camera processor also controls its movements independently of the external vehicle processor can control in real time.
    The invention will be explained in more detail below on the basis of an exemplary embodiment with the aid of the enclosed figures. It show here the
    Fig. 1 is a schematic representation of a vehicle headlamp according to the invention.
    1 shows a vehicle headlight according to the invention with a housing 1 with an interface 2 for connection to an external vehicle processor 3. Within the housing 1 modulated light or IR radiation sources 4 are arranged like a matrix, such as on a movable module carrier 5. In most cases Light or IR radiation sources 4 also provided with a corresponding bundling optics. Within the housing 1 is also an image sensor 6 for determining depth information from • ft
    · ··········································. The backscatter radiation of the light or IR radiation sources 4, as it is also used in conventional time-ff flight cameras application finds, wherein the image sensor 6 is arranged in the embodiment shown on the Modülträger 5, so that during movements of the module carrier 5, both the light or IR radiation sources 4, as well as the image sensor 6 are moved. Also, the image sensor 6 is usually provided with its own bundling optics. The relative arrangement of the image sensor 6 and the light or IR radiation sources 4 will vary depending on the design of the vehicle headlight. The vehicle headlight is also terminated on its emission side with an optional protective cover 7, which is transparent to the translucent light in both directions of penetration. The inventive arrangement of the image sensor 6 within the housing 1 also represents the advantage that the transmission behavior of the protective cover 7 against light of different frequencies, the headlight manufacturer is not only known, but also can be optimized accordingly, in particular with regard to the image sensor 6. It should be noted here that windshields are increasingly being equipped with optical properties, such as tints and the like, which can adversely affect the transmission behavior for light with respect to the image sensor 6 and are hardly influenced by the headlight manufacturer. In addition, the image sensor 6 benefits from any cleaning systems for the protective cover 7. The optical shield 7 may be designed such that it reduces scattered light from the light or IR radiation sources 4 to the image sensor 6 in order to minimize the self-glare of the image sensor 6.
    The image sensor 6 is further connected to a processor 8 which fulfills the function of a time-of-flight camera process prs and is connected via a modulator 9 to at least part of the modulatable light or IR radiation sources 4 arranged inside the housing 1. Since comparatively high modulation frequencies in the MHz range are required for obtaining depth information via the image sensor 6, it is advantageous to use only part of the modulable light or IR radiation sources 4 as ToF light sources in order to reduce heat generation on the one hand on the other hand with the remaining part of the modulable light or IR radiation sources 4 by modulation in the usual kHz range to allow about different brightness settings. In this case, the modulator 9 is embodied as a unit in FIG. 1, which can carry out modulations in different frequency ranges and is therefore suitable for controlling all light or IR radiation sources 4, regardless of whether they are used for illumination and signaling or for obtaining depth information serve.
    In the embodiment shown, the processor 8 is also connected to the module carrier 5 in order to drive the module carrier 5. The image sensor 6 could, however, also be arranged on a separate image sensor carrier, which in this case is likewise connected to the processor 8 6/11 * * ΗΗ ·· · * * • · · · · • • • • • • • • • • • • • 8 8 8 8 . 6 · .. · · · · · · · · · · · · · ··································································································································································································· The processor 8 is also connected via a bidirectional data link 10 to the interface 2 to exchange data and control commands with the external vehicle processor 3. Functionally, the processor 8, the image sensor 6, the modulator 9, and that portion of the modulatable light or IR radiation sources 4, which is modulated for obtaining depth information with comparatively high MHz frequencies in the MHz range, form a ToF camera. Although the functional separation for controlling the modulable light or IR radiation sources 4 for illumination and signaling can hardly be made. The vehicle headlamp according to the invention is thus not distinguishable from a conventional vehicle headlamp in its basic feature of illumination and signaling, but additionally offers the function of a 3D depth calculation in each pixel of the ToF image sensor 6 and applications derived therefrom. In addition, the vehicle headlight according to the invention additionally provides the programmable power of the processor 8, which can take over tasks for controlling the illumination or signaling as well as for event monitoring in the environment of the vehicle from the external vehicle processor 3. The vehicle headlamp according to the invention can thus perform tasks such as the calculation of the distance of objects in the field of vision of the vehicle headlamp, the object and person tracking in the field of vision of the vehicle headlamp by calculating their trajectories, the calculation of collision probabilities with objects and persons by extrapolation of their motion vectors, the calculation of Illuminating profiles such as cornering lights, cornering lights or fog lights to support the ferry service, the calculation of illuminated profiles for marking of endangered objects and persons by their additional illumination, or the calculation of illumination profiles to prevent dazzling oncoming traffic by selective suppression when driving with high beam.
    In practical terms, however, the vehicle headlight according to the invention is logistically responsible for the responsibility of the headlight manufacturer, only the interface 2 of the vehicle headlight to the external vehicle processor 3 must be additionally controlled, with a bidirectional and preferably real-time control and event interface to the vehicle processor 3 is sufficient. In this way, an application of the ToF technology that is suitable for everyday use and suitable for mass production is achieved through its best possible integration into conventional vehicle technology. 7/11
    权利要求:
    Claims (4)
    [1]
    1, F ahrzeugschein werter with a housing (1) and within the housing (1) arranged modulable light or M-Strahlungsqüellen (4), and an interface (2) for connection to an external Eahrzeugprozessor (3), characterized in that an image sensor (6) for determining depth information from the backscatter radiation of the light or IR radiation sources (4) is arranged within the housing (1), and a processor (8) connected to the image sensor (6), wherein the Processor (8) on the one hand via a modulator (9) with at least part of the housing (1) arranged, modulated light or IR radiation sources (4) is connected, and on the other hand via a bidirectional data connection (10) with the interface ( 2) is connected.
    [2]
    2, vehicle headlight according to claim 1, wherein the light or IR StraMungsquellen (4) on a movable module carrier (5) are arranged, characterized in that the image sensor (6) on the module carrier (5) or on one with the module carrier ( 5) is arranged jointly controlled image sensor carrier.
    [3]
    3, vehicle headlight according to claim 2, characterized in that the processor (8) with the module carrier (5) and the image sensor carrier is connected.
    [4]
    4, vehicle with at least one vehicle headlight according to one of claims 1 to 3. Vienna, am-6. May 2013 Kliment & Henhapel Patent Attorneys OG
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    法律状态:
    2017-03-15| PC| Change of the owner|Owner name: BECOM BLUETECHNIX GMBH, AT Effective date: 20170123 |
    优先权:
    申请号 | 申请日 | 专利标题
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    US14/889,668| US9802527B2|2013-05-06|2014-05-06|Vehicle headlight|
    JP2016512347A| JP2016522545A|2013-05-06|2014-05-06|Vehicle headlight|
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    PCT/EP2014/059250| WO2014180856A1|2013-05-06|2014-05-06|Vehicle headlight|
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