• 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:
    Lighting device (1) comprising: - a light source (10) emitting an oriented light beam; - a deflection facility (20) for deflecting the oriented light beam provided by the light source (10), - a beam splitter (40) for decoupling a portion of the light beam deflected by the deflection facility (20), - an image sensor (50) for capturing the portion of the light beam decoupled by the beam splitter (40) and providing an output signal corresponding to the light beam captured, and - an operating installation (60) for receiving the outgoing signal provided by the image sensor (50) and detecting a malfunction of the illumination device (1) if the output signal provided by the image sensor (50) differs from a predefined target value.
    公开号:FR3046901A1
    申请号:FR1750366
    申请日:2017-01-18
    公开日:2017-07-21
    发明作者:Frank Schatz；Ulrike Schloeder
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    Field of the invention
    The present invention relates to a lighting device and a method of monitoring such a lighting device. The invention particularly relates to the monitoring of a lighting device which comprises a deflection facility deviating the oriented light beam provided by a light source.
    State of the art
    DE 10 2011 080 559 A1 discloses a lighting device of a vehicle. The lighting device includes a light source and a light guiding unit for generating a predefined distribution of light. The light guiding unit comprises a deflection surface formed of a set of micromirrors adjustable independently of one another about a pivot axis.
    Laser-based light modules are, for example, used in headlamps fitted to motor vehicles. In addition, scanning laser lighting modules are increasingly being used in many fields of application. Thus, an oriented light beam, for example of a laser source, is deflected by a scanning mirror system (s) in a one or two dimensional deviation to a converter. The converter thus transforms the generally monochromatic light into a broad spectrum of wavelengths so that the outgoing light appears, for example, globally as white light. By appropriate control of the deflection system and the synchronous switching of the laser sources, different light distributions are thus generated.
    For this principle, it is necessary to use laser powers of the order of several watts. As the beam diameter is relatively small, if any, less than one millimeter, this corresponds to a high power density in the scanning light beam. Because of the high potential risk of such a high energy light beam, it is essential to apply safety principles which are, in part, imposed by the legislator.
    Description and advantages of the invention
    The present invention thus relates to a lighting device comprising: a light source emitting an oriented light beam, a deflection facility for deflecting the oriented light beam, provided by the light source, a beam splitter for decoupling a portion of the beam light deflected by the deflection facility, an image sensor for capturing the portion of the light beam decoupled by the beam splitter and providing an outgoing signal corresponding to the light beam captured and an operating facility for receiving the output signal provided by the image sensor and detecting a malfunction of the lighting device if the outgoing signal provided by the image sensor differs from a predefined setpoint.
    In other words, the invention develops a lighting device comprising a light source, a deflection installation, a beam splitter, an image sensor and an operating installation. The light source emits a directed light beam. The deflection facility deflects the oriented light beam provided by the light source. The beam splitter decouples a portion of the light beam deflected by the deflection facility. The image sensor captures the portion of the light beam decoupled by the beam splitter and provides an output signal corresponding to the light beam captured. The operating system receives the outgoing signal provided by the image sensor and detects a possible malfunction of the lighting device if the outgoing signal provided by the image sensor differs from a predefined value.
    According to another development, the subject of the invention is a method for monitoring a lighting device comprising a deflection installation which deflects the oriented light beam emitted by a light source, the method comprising the following steps: decoupling a part of the light beam deflected by the deflection installation, grasping the uncoupled part of the deflected light beam with the aid of an image sensor; and detecting a malfunction of the illumination device if the decoupled portion of the deflected light beam, entered, differs from a predefined target value.
    In other words, the subject of the invention is a method of monitoring a lighting device equipped with a deflection installation for deflecting the oriented light beam emitted by a light source. As already indicated, the method consists in decoupling a part of the light beam deflected by the deflection installation and in grasping this decoupled part with an image sensor. The method also includes detecting the malfunction of the illumination device if the decoupled portion, entering the light beam, differs from a predefined target value.
    In general, the invention is based on the idea of decoupling, in a scanning illumination system, part of the scanning light beam by means of a beam splitter and grasping and exploiting this uncoupled portion of the beam scanning light using an image sensor. In particular, the image sensor is a surface image sensor, that is to say, two-dimensional. This allows a complete capture of the scanning light beam. In particular, this makes it possible to detect the direct defects caused by the poor deviation of the oriented light beam. This makes it possible to detect the defects of the control of the deflection installation in the case of a directed light beam. In addition, it is also very easy to detect any defective deflection of the oriented light beam that would result from damage or a defective adjustment of the deflection facility. Finally, it also makes it possible to detect defective deflections related to technical deformations or other causes resulting from the operation of the lighting device and that by a fast and reliable detection.
    As the beam splitter of the lighting device according to the invention decouples a part of the light beam once this beam has been deflected by the deflection installation, the image signal detected by the image sensor and which is then exploited, corresponds to the luminous pattern emitted by the lighting device. This makes it possible to detect directly, from the light pattern captured by the image sensor and without other complicated processing steps, to conclude the lighting pattern. This makes it particularly easy and efficient to monitor the illumination pattern emitted by the illumination device.
    The light source is, for example, a laser source. In particular, and by way of example, there are semiconductor diode laser sources which emit laser light with a certain wavelength. For example, the light source is a laser source emitting blue light in the range between 400 and 500 nm and in particular 450 nm. In addition, any other light source, including also laser sources having any other wavelength are conceivable. Thus, for example, we can consider laser sources operating in the infrared range or in the ultraviolet range of wavelengths. It is also possible to combine laser beams with different wavelengths. This allows, for example, to develop a laser beam whose light consists of several color components, such as, for example, red light (R), green light (G) and blue light (B) to form a RGB light beam.
    According to a development, the lighting device comprises a conversion installation. This conversion facility converts a wavelength of the light beam emitted by the light source at least in part into at least one other wavelength. This conversion installation of the lighting device converts the monochromatic light of the light source into a light at several wavelengths, in particular a light of a light spectrum. This allows, for example, to convert blue monochromatic light by the conversion facility into a light having a broad wavelength spectrum so that the sum corresponds, for example, to white light.
    According to one development, the conversion facility is placed in the beam path between the deflection facility and the beam splitter. In this way, the light deflected by the beam splitter and converted, will be decoupled for application to the image sensor. The image sensor can, in this case, capture the light converted by the conversion facility. This also makes it possible, thanks to the image sensor and the downstream operating installation thereof, to verify that the installation correctly converts the light.
    According to an alternative embodiment, the beam splitter is installed between the deflection installation and the conversion installation. In this way, the beam splitter can decouple the scanning light beam before the light is converted by the conversion facility. Thus, the image sensor and the downstream operating installation capture the deflected light beam which contains only the wavelength or the wavelengths of the light emitted by the light source. This makes it possible to very simply adjust the image sensor to the wavelength or wavelengths to be captured in this light.
    According to another development, the operating installation exploits a local distribution of light on the image sensor and / or a color of the light captured by the light sensor. The exploitation of the local distribution of light on the image sensor can thus detect a defect in the control of the deflection installation or in the control of the laser source. In addition, exploiting the local distribution of light also makes it possible to detect a possible faulty synchronization. By exploiting the color of the light captured by the light sensor, that is to say by determining the wavelengths detected by the image sensor or the color spectrum, one can, for example, detect a defect in the conversion facility.
    According to another development, the operating device cuts off the light source if a faulty operation is detected. This allows, in the event of a fault detected in the lighting device, to make a safety break to avoid any potential risk.
    According to another development, the image sensor is a two-dimensional image sensor. In particular, the image sensor is a digital image sensor such as a CCD or CMOS sensor. The image sensor may, depending on the application, be designed as an image sensor which captures only a light intensity for one or more predefined wavelengths or predefined wavelength spectra. Alternatively, the image sensor may also be a color sensor which, in addition to the single intensity, also reacts to the color of the light, i.e. the wavelength or the length spectrum of wave associated with incident light incident.
    According to another development, the lighting device comprises a control device. The control device thus activates the deflection facility. In addition, the controller adjusts the control of the deflection facility using the outgoing signal provided by the image sensor. This makes it possible to adapt the control of the deflection installation and, if appropriate, that of other components of the lighting device, in real time, to compensate for any disturbances or defects already during operation. This allows, for example, to compensate in real time the variations in deflection related to temperature variations or similar phenomena.
    According to one development, the beam splitter decouples less than 1% of the light intensity of the light beam arriving on the beam splitter. In particular, the beam splitter can decouple less than 0.5% or 0.1% of the intensity of light arriving at the beam splitter. In addition, it is possible with the beam splitter to decouple an even smaller portion of light intensity, for example 0.01% and if necessary only 0.001%. The beam splitter thus decouples, according to one embodiment, throughout the scanning range of the lighting device, that is to say in the full range of deflection of the light beam directed by the deflection installation, each a constant part of the luminous intensity. Alternatively, it can also be envisaged that the deflection facility decouples only in a predefined partial range of the scanning range, for example, only in the marginal or central range, in the middle of the scanning range, a part of the luminous intensity of the oriented light beam.
    According to one development, the deflection installation comprises a micro-mirror device with a microelectromechanical system. In particular, the deflection installation comprises a micro-mirror device whose micro-electromechanical system deflects the micromirror in two directions of space. In a variant, it is also possible to envisage deflection installations composed of two micro-mirror devices one behind the other and each micro-mirror of which deviates only in a direction of space. In addition, deflection facilities can also be envisaged with any number of other deflection facilities that control the light distribution of a light source. In particular, there is, for example, the digital micro mirror device (DMD) which achieves a variable distribution of light with a surface modulated density.
    According to another development, the invention relates to a projector, in particular a vehicle headlamp equipped with such a lighting device. Other lighting devices for lighting systems in the visible wavelength and non-visible wavelength range may also be considered.
    drawings
    The present invention will be described hereinafter in more detail with the aid of various embodiments of lighting devices shown in the accompanying drawings, in which: FIG. 1 schematically shows a first embodiment of a device of FIG. according to the invention, FIG. 2 schematically shows a second embodiment of a lighting device according to the invention, and FIG. 3 is a simplified diagram of a flowchart for implementing the method according to a embodiment of the invention.
    Description of embodiments
    Figure 1 is a schematic representation of a lighting device 1 according to one embodiment of the invention. The lighting device comprises a light source 10, a deflection installation 20, a beam splitter 40, an image sensor 50 and an operating installation 60. The lighting device may also comprise a light installation. conversion 30. Several optical lenses or lens systems are conceivable but which have not been shown so as not to complicate the presentation of the invention. Only one image lens 70 is shown to visualize this situation. In the embodiments described below, the same components and the like components bear the same references. In addition, the embodiments described hereinafter, unless otherwise indicated, may be combined in any manner. The complements and modifications of the embodiments described are also part of the object of the invention.
    The light source 10 may be, in principle, any light source emitting an oriented light beam. In particular, it is possible to use, for example, laser sources which emit a light beam of a certain orientation. Such laser sources are feasible, for example using semiconductor diodes. In particular, it is also possible to envisage oriented light sources with several distinct light beams combined in a common light beam of the same orientation. The light source 10 may emit light, for example monochromatic, of a given wavelength. The monochromatic light is, in the visible range, in the range of blue wavelengths between 400 and 500 nm and in particular in the vicinity of 450 nm. But one can also have a monochromatic light having a different wavelength, especially in the wavelength range of the ultraviolet or infrared. The light source can also emit a directed light beam at several wavelengths or also a wavelength spectrum. It is, in particular, possible to have a light source 10 with several distinct elements constituting light sources and whose beams are combined into a common beam for the light source 10. The different elementary light sources emit light of the same length waveform or alternatively light with different wavelengths. If the light source 10 combines several different wavelengths, it provides an oriented light beam having several different color components.
    The oriented light beam emitted by the light source 10 is directed in the direction of the deflection facility 20. The directed light beam emitted by the light source 10 arrives at the deflection facility 20 which deflects the beam into one or in two directions of space. For example, the deflection facility 20 is constituted by a micro-mirror device of which a micromirror deviates in two directions of space which are preferably orthogonal to each other. It is also possible to have deflection installations 20 having two micromirrors respectively oriented in one direction of the space so that the combination of the two micromirrors also makes it possible to deflect the oriented light beam in two directions of space. The micro-mirrors can also be deflected by micro-electromechanical structures (MEMS element) to deflect the light beam oriented in the right direction of space. The corresponding microelectromechanical structures may, for this purpose, be controlled by a suitable control circuit, not shown. Thus, the oriented light beam emitted by the light source 10 will be deflected in a targeted manner by the deflection facility 20 so that the deflected light beam scans a predefined pattern. Thus, using the directed light beam can project a lighting pattern in two dimensions, predefined by the targeted deviation. The scanning light beam, deflected by the deflection installation 20, can then be focused, if necessary, by an optical system 70 before arriving after its deflection by the deflection device 20, on a beam splitter 40 which cuts off a part of the deflected light beam. The beam splitter 40 may decouple a portion of the deflected light beam throughout the scanning range of the deflected light beam. In this case, the extension of the beam splitter 40 is at least as large as the swept area of the deflected light beam. Alternatively, it is also possible for beam splitter 40 to decouple only a portion of the deflected light beam into a portion of the sweep range of the deflected light beam. For example, the beam splitter 40 may be in the edge area of the scan area. Alternatively, it is also possible to envisage a beam splitter 40 which is installed only in the central zone of the scanning range of the deflected light beam and then the beam splitter 40 will be smaller and in particular much smaller than the light beam deviated in the scanning area.
    The beam splitter 40 is, for example, a beam splitter board. Such a beam splitter board reflects a portion of the incident light and the remaining portion of the incident light is transmitted through the wafer. Preferably, the beam splitter 40 only decouples a very small portion of the light intensity of the deflected light beam so that the main portion of the deflected light beam passes through the beam splitter 40. The beam splitter 40 can decouple less than 1%, preferably less than 0.1% of the light power of the deflected light beam. The beam splitter may also decouple only 0.5% or 0.05% of the light power of the light arriving on the beam splitter 40. In addition, beam splitters 40 which decouple a smaller fraction may also be considered. incident light power, for example, a maximum of 0.01% or a maximum of 0.001%.
    The light decoupled by the beam splitter 40 is deflected through the beam splitter 40 to the image sensor 50. The image sensor 50 is a bidirectional image sensor. The image sensor comprises, for example, several image capture elements installed on a two-dimensional surface. In particular, the image sensors are in the form of CCD or CMOS image sensors. One can also consider any other two-dimensional image sensor. The image sensor 50 can be limited to a two-dimensional capture of the received light intensity. The image sensor 50 selectively responds only to the light corresponding to one or more predefined wavelengths. For example, upstream of the image sensor 50 there is a suitable filter. It is also possible that the image sensor 50 captures the intensity of all the incident light and exploits it. Alternatively, the image sensor 50 may not only capture the intensity of the light, but also its color, i.e., the wavelength or wavelength spectrum of the incident light. . For example, one can have image sensors with several sensor elements each of which is sensitive to a different wavelength. The image sensor 50 may be a conventional image sensor, a conventional camera module or any similar device. It is also possible to select the different colors with appropriate color filters upstream of the different sensor elements constituting the image sensor 40.
    Between the deflection facility 20 and the beam splitter 40 can be interposed a conversion facility 30. This conversion facility 30 allows, for example, to convert the wavelength of a portion of the incident light arriving on the conversion facility 30 to another wavelength or wavelength spectrum. This allows, for example, from a light beam, oriented, deflected, monochromatic light, to generate a light at several wavelengths or having a wavelength spectrum. In this case, the beam splitter 40 decouples the entire spectrum generated by the conversion facility 30.
    The image sensor 50 then provides an outgoing signal corresponding to the captured light which has been decoupled by the beam splitter 40. This signal corresponds to the image projected onto the image sensor by the beam splitter 40. The case between beam splitter 40 and image sensor 50, an optical system composed of one or more optical lenses may be interposed. The image captured by the image sensor 50 is then analyzed by an operating system 60. The operating system 60 can compare the data of the outgoing signal provided by the image sensor 50 with a predefined pattern. This predefined pattern or model corresponds, for example, to the image to be projected if the control of the deflection installation 20 is in order. Suitably, the image captured by the image sensor 50 and the desired target image correspond entirely or at least approximately, which means that the oriented light beam has not been deviated. correctly by the deflection facility 20, but that there is no defect in the image. If, however, the image captured by the image sensor 50 differs significantly from the target image to be obtained, it means that the operating installation 60 has detected a fault in the lighting device 1. This defect is, for example, a defective control of the deflection facility 20. It is, for example, possible that the rise in temperature does not allow a correct deflection of the light beam directed by the deflection facility 20. But, it may also be damage to the lighting device 1 or another incident. In addition, it is possible that due to synchronization problems or similar difficulties, the deflection of the oriented light beam will not be correct. In this case, the operating installation 60 neutralizes the lighting device 1 to avoid any risk associated with a light beam of high luminous intensity and which would be transmitted wrongly.
    Alternatively, it is also possible for the operating system 60 or other control device to analyze the image data captured by the image sensor 50 and thereby determine the difference between the image to be obtained and the image actually captured. Depending on this difference, it is then possible to calculate, if necessary, control parameters to adapt the deflection of the deflection installation 20. This also allows, during the operation of the lighting device 1, to have a command active to compensate for any disturbances or similar elements, and this in real time.
    In addition, in the case of a color input of the image projected on the image sensor 50, it is also possible to detect any shift in the color spectrum or a local change in the color. The operating system 60 may examine the color of the image projected by the beam splitter 40 on the image sensor 50 and compare the color thus input with the desired color setpoint. If the color captured by the image sensor 50 differs significantly from the predefined color, it can be deduced that it is, for example, a possible defect or a damage of the conversion installation. 30. It is also possible to install an appropriate color filter in front of the image sensor 50, this filter being tuned to a predefined wavelength or a predefined spectrum of wavelengths. If the wavelength or spectrum of the wavelengths of light arriving on the color filter shifts, the portion of the light transmitted or absorbed by the filter will also be changed, which will result in a change in the color of the light. light intensity detected by the image sensor 50. This allows to deduce a possible malfunction and to detect a change in the wavelength or wavelength spectrum so that we can adapt , where appropriate the light source 10 for adapting the color point or the wavelength or the spectrum of the wavelengths of the light emitted by the light source 10. In particular, it is possible to adapt the color point to compensate the difference detected.
    The parameters determined by the operating installation 60 such as the degree of agreement between the image actually projected by the deflected light beam and a predefined target image; the parameter intended for the image to be projected and / or a color spectrum captured by the image sensor may also be provided by the operating installation for further processing. In particular, the data entered can be recorded in a fault memory and if necessary also be presented to the user by a display.
    Figure 2 shows another embodiment of a lighting device 1. The lighting device 1 of this embodiment corresponds largely to that of the embodiment described above. In place of the beam splitter 40 which reflects the small fraction of the light to be decoupled, this embodiment is provided by a beam splitter 40 which transmits the small portion of light to be decoupled through the beam splitter 40 while the remaining part of the deviated light beam is reflected by beam splitter 40.
    In addition, in this embodiment, as in that described above, beam splitter 40 and conversion plant 50 can be combined into a common component.
    It is also possible to put the conversion facility 30 in the path of the beam downstream of the beam splitter 40 so that the beam splitter 40 decouples the light before it is converted by the conversion facility 30.
    The conversion and division of the light beam can be done in a common component. Thus, for example, the conversion facility 30 may reflect the main portion of the converted light and at the same time transmit the small fraction of the light as described above through the conversion facility 30. This transmitted light can then be captured by the image sensor 50 to be exploited. Similarly, it is possible to have a conversion facility 30 which transmits the main part of the light and reflects only the small fraction of light, this reflected light will be diverted to the image detector 50 which will capture it for exploitation. .
    Figure 3 schematically shows a flowchart for implementing the monitoring method of a lighting device 1 and which is performed, for example, as described above. In particular, this method makes it possible to monitor a lighting device 1 comprising a deflection installation 20 which illuminates the deflection installation 20 with a light beam oriented and supplied by the light source 10. In the step S1, all of the light is removed. Firstly, part of the light beam deflected by the deflection facility. In step S2, the decoupled portion of the deflected light beam is captured with an image sensor 50, and in step S3 the malfunction of the lighting device 1 is detected if the decoupled portion of the deflected light beam differs. a preset setpoint.
    In summary, the invention relates to the monitoring of a lighting device with an oriented light beam, ensuring the scanning. After the deflection of the scanning light beam, a portion of the light intensity is cut off and captured with a two-dimensional image sensor. The image data thus provided by the image sensor is compared to a set value and in case of deviation it is concluded that there is a defect in the lighting device.
    NOMENCLATURE OF THE MAIN ELEMENTS 1 Lighting device 10 Light source 20 Deflection installation 40 Beam splitter 50 Image sensor 60 Operating installation 70 Imaging lens / optical system SI, S2, S3 Steps in the operating process
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1 °) lighting device (1) comprising: a light source (10) emitting an oriented light beam; a deflection facility (20) for deflecting the oriented light beam, provided by the light source (10), a beam splitter (40) for decoupling a portion of the light beam deflected by the deflection facility (20), a sensor image (50) for capturing the portion of the light beam decoupled by the beam splitter (40) and providing an outgoing signal corresponding to the light beam captured and an operating installation (60) for receiving the outgoing signal provided by the beam splitter image sensor (50) and detecting a malfunction of the lighting device (1) if the outgoing signal provided by the image sensor (50) differs from a predefined set value.
    [0002]
    2) lighting device (1) according to claim 1, characterized in that it comprises a conversion facility (30) for converting the light of the light beam emitted with a certain wavelength by the light source, to less in part in a light having another wavelength.
    [0003]
    3) lighting device (1) according to claim 2, characterized in that the conversion facility (2) is placed between the deflection facility (20) and the beam splitter (40).
    [0004]
    4 °) lighting device (1) according to one of claims 1 to 3, characterized in that the image sensor (50) has a two-dimensional sensor surface.
    [0005]
    5 °) lighting device (1) according to one of claims 1 to 4, characterized in that the operating installation (60) exploits the local distribution of light on the image sensor (50) and / or the color of the light captured by the image sensor (50).
    [0006]
    6 °) lighting device (1) according to one of claims 1 to 5, characterized in that the operating device (60) cuts the light source (10) if a malfunction has been detected.
    [0007]
    7 °) lighting device (1) according to one of claims 1 to 6, characterized in that it comprises a control device for controlling the deflection installation (20) and adapt the control of the installation of deflection (20) using the outgoing signal provided by the image sensor (50).
    [0008]
    8 °) lighting device (1) according to one of claims 1 to 7, characterized in that the beam splitter (40) decouples less than 1% of the light intensity of the incident light beam arriving on the divider of beam (40).
    [0009]
    9 °) lighting device (1) according to one of claims 1 to 8, characterized in that the deflection facility (20) comprises a micro-mirror device with a micro-electromechanical system.
    [0010]
    A method of monitoring a lighting device (1) having a deflection facility (20) which deflects the oriented light beam emitted from a light source (10), the method comprising the following steps of: decoupling ( IF) a part of the light beam deflected by the deflection facility (20), grasping (S2) the decoupled portion of the deflected light beam with the aid of an image sensor (50), and detecting (S3) a malfunction of the lighting device (1) if the decoupled part of the deflected light beam, entered, differs from a predefined setpoint.
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    DE102017219502A1|2017-11-02|2019-05-02|Bayerische Motoren Werke Aktiengesellschaft|Lighting device for a motor vehicle|
    DE102017219504A1|2017-11-02|2019-05-02|Bayerische Motoren Werke Aktiengesellschaft|Lighting device for a motor vehicle|
    DE102017128670A1|2017-12-04|2019-06-06|HELLA GmbH & Co. KGaA|Lighting device for a motor vehicle, in particular headlights|
    DE102017128674A1|2017-12-04|2019-06-06|HELLA GmbH & Co. KGaA|Lighting device for a motor vehicle, in particular headlights|
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    KR102266918B1|2019-01-18|2021-06-18|정재현|Ultraviolet light emitting device and uv curing apparatus employing the same|
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    DE102020100122A1|2020-01-07|2021-07-08|HELLA GmbH & Co. KGaA|Device and method for function monitoring of light sources|
    法律状态:
    2018-01-24| PLFP| Fee payment|Year of fee payment: 2 |
    2019-01-22| PLFP| Fee payment|Year of fee payment: 3 |
    2019-02-15| PLSC| Publication of the preliminary search report|Effective date: 20190215 |
    2020-01-23| PLFP| Fee payment|Year of fee payment: 4 |
    2021-01-20| PLFP| Fee payment|Year of fee payment: 5 |
    2022-01-18| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102016200590.1|2016-01-19|
    DE102016200590.1A|DE102016200590A1|2016-01-19|2016-01-19|Lighting device and method for monitoring a lighting device|
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