WO2017148764A1 - Dispositif d'éclairage et procédé d'éclairage ainsi que programme d'ordinateur - Google Patents

Dispositif d'éclairage et procédé d'éclairage ainsi que programme d'ordinateur Download PDF

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Publication number
WO2017148764A1
WO2017148764A1 PCT/EP2017/054034 EP2017054034W WO2017148764A1 WO 2017148764 A1 WO2017148764 A1 WO 2017148764A1 EP 2017054034 W EP2017054034 W EP 2017054034W WO 2017148764 A1 WO2017148764 A1 WO 2017148764A1
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WO
WIPO (PCT)
Prior art keywords
light
light image
image
pixels
original
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2017/054034
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German (de)
English (en)
Inventor
Alexander Gordon Wolf
Roland Johann LACHMAYER
Gerolf Kloppenburg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leibniz Universitaet Hannover
Original Assignee
Leibniz Universitaet Hannover
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Leibniz Universitaet Hannover filed Critical Leibniz Universitaet Hannover
Publication of WO2017148764A1 publication Critical patent/WO2017148764A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0911—Anamorphotic systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/08—Anamorphotic objectives
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1415—Dimming circuits
    • B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G02B19/0066—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED in the form of an LED array

Definitions

  • the invention relates to an illumination device for pixel-wise, pixel-individually controllable light emission into the environment of the illumination device in order to generate in the environment of the illumination device an output light image formed from light pixels.
  • the invention also relates to a corresponding method for pixel-wise, pixel-individually controllable light emission into the environment and to a computer program for carrying out the method
  • Such lighting devices and lighting methods are e.g. known from the field of light projectors, in particular the video projectors (projectors).
  • projectors projectors
  • US 2015/0377442 A1 describes a pixel-by-pixel projection by means of a motor vehicle headlight.
  • An LED light source emits light into the environment via a DMD (Digital Micromirror Device) and downstream optics.
  • Such projection techniques are already known from the production of widescreen movies for cinemas.
  • the invention is therefore based on the object to provide a lighting device and a corresponding lighting method and a computer program in which the light distribution can be adapted to the particular needs of the application with little effort, the light distribution also in terms of brightness distribution.
  • This object is achieved by an illumination device for pixel-wise, pixel-individually controllable light emission into the surroundings of the illumination device, in order to produce in the surroundings of the illumination device an output light image formed from light pixels, wherein the illumination device has the following:
  • At least one light-emitting device which has a matrix of individually controllable light-emitting pixel elements for generating an original light image formed from light pixels
  • the optics formed as the originating light image optical recording is the uniformly large light pixels of the original light image recorded in unevenly large light pixels in the output light image, wherein the magnification between the output light image and the original light image on the amount of optically influenced light pixels of the light emitting device is nonuniform and at least by a factor - ⁇ 2 varies.
  • the invention has the advantage that with little technical and financial effort, the original light image of the light emitting device can be converted to a desired brightness distribution of the light in the output light image. For this, no complex intervention in the light emitting device or a light source coupled thereto is required. It can be used for this purpose, an optic having a plurality of optical elements.
  • the optics are deliberately designed as a distinctive look, in contrast to the corresponding approaches in video projectors or motor vehicle headlights. The optics registers evenly large light pixels of the original light image in unevenly sized light pixels in the output light image.
  • the light distribution can be varied significantly, especially in terms of brightness on the light influenced by the optics, for example, the brightness can predominantly in the central region of the output light image be concentrated.
  • a motor vehicle headlight in the form of a matrix headlight, which has a desired brightness distribution profile for motor vehicles, in which the brightness in the center of the output light image is increased in comparison to the edge regions.
  • a light emitting device with uniform Lichtabgabshellmaschine the individual light emitting pixel elements can be used.
  • other light emitting devices can be used, which already have a different distribution of the light emission brightness of the pixel elements.
  • the desired brightness distribution can be realized with a comparatively compact illumination device, which is advantageous in particular for vehicle applications.
  • the light efficiency is comparatively high.
  • the light emission device can be designed with or without its own light source.
  • the light emitting device may be formed, for example, as an LED matrix arrangement or matrix arrangement of other light sources.
  • the light emitting device may also be designed as a light manipulator such as a DMD or LCD.
  • the light-emitting device is then irradiated by a light source, which may be designed as an LED or other light source.
  • the DMD then reflects the light emitted therefrom by the light source to produce the output light image.
  • an LCD as a light emitting device cause the individual light emitting pixel elements depending on the control of a more or less strong interruption of the light rays from the light source.
  • Another advantage of the invention is thus its suitability for all currently known pixel-wise light emitting devices such as LED matrix, DMD and LCD.
  • the light emitting device can be configured to emit monochrome light and / or light with adjustable light color, in particular adjustable light color per light emitting pixel element.
  • the light-emitting device can be set up for stepless or fine-grained change in the brightness of the emitted light, in particular for pixel element-individual control of the brightness, or for a large-scale change in brightness, up to an on / off control.
  • the light emitting device may be configured to generate uniformly large light pixels of the original light image.
  • the light emitting device may also be configured to generate unevenly sized light pixels of the original light image.
  • the magnification may e.g. as the quotient between the light radiated from the optics and the light radiated into the optic, i. as a quotient of the pixel size of the output light image to the pixel size of the original light image.
  • the optical elements of the optic may e.g. be formed as one or more lenses, mirrors, diffractive optical elements and / or diffraction gratings.
  • the optics can in particular be set up to reproduce the light pixels with a smaller magnification in the middle of the image of the output image than in edge regions of the output light image. In this way, the brightness of the light output in the center of the image is increased. In addition, this leads to relatively small light pixels in the middle of the image of the output light image compared to the edge region, so that more individual pixels per unit area can be controlled individually in the middle of the image than in the edge region.
  • the possibilities are improved to project by means of the lighting device and information for the driver on the road or other facilities such as house walls or traffic signs. Again, the highest possible resolution is advantageous in the middle image area.
  • the optics is arranged to distort the light pixels of the original light image in the horizontal spatial direction, the uniformly large light pixels of the original light image in the horizontal spatial direction in unevenly large light pixels recorded in the output light image, and / or the optics for distortion of the light pixels of the original light image is arranged in the vertical spatial direction, the uniformly large light pixels of the original light image in the vertical spatial direction recorded in unevenly large light pixels in the output light image.
  • the desired concentration of brightness in the image center can be realized in one dimension (horizontal or vertical) or in two dimensions (horizontal and vertical) without changing the light pixels in terms of their angles.
  • the optics is set up for a rotationally symmetrical distortion of the original light image, in which the magnification between the output light image and the original light image changes depending on the distance of a light pixel from a reference point of the original light image.
  • the reference point may e.g. be the center of the original light image.
  • the optics is set up to uniformly convert large light pixels of the original light image towards the center of the light emission area into smaller light pixels in the output light image than in the edge region of the light emission area. This is suitable theticianseinnchtung in particular for use as motor vehicle headlights.
  • the optics is set up to distort the light pixels of the original light image in the output light image, so that rectangular and / or rectangular light pixels of the original light image are changed to non-rectangular and / or non-rectangular light pixels in the output light image.
  • the illumination device has a control device which is set up to control the light emitting device and, accordingly, for individual control of the individual light emitting pixel elements, wherein the control device is adapted via an interface data that a target image of light to be emitted to receive and to determine therefrom by means of a distortion correction means therefrom such corrected distortion control data for the light emitting device that the output light image reproduces the target image substantially distortion free.
  • the distortion correction device can also be set up to perform a corresponding brightness correction.
  • a distortion correction is performed not only with regard to the position of the light pixels, but additionally with regard to the brightness of the light pixels.
  • the distortion correction device may be implemented by hardware and / or software, eg a signal processor or a software module, which performs a corresponding distortion correction by means of a transformation matrix.
  • the transformation matrix or, in general, the distortion correction performed by the distortion correction device can be predefined for a specific optical system.
  • the distortion correcting means may perform the desired distortion correction due to a known redistribution characteristic of the optics. This characteristic can be deposited eg by means of empirical formulas or as a vector or matrix in the distortion correction device.
  • the optics has at least one optical collecting element and at least one optical distortion element, wherein the optical collecting element is arranged in the light beam path of the light emitting device in front of the optical distortion element.
  • the optical collection element has the advantage that light emission devices of virtually any type can be used, i. also those which do not have a particularly focused light emission, but e.g. have a relatively large angle of radiation.
  • the sharp image of the original light image in the output light image can be further improved with the optical collecting element.
  • a further optical element to be arranged in the light beam path of the light emission device behind the optical distortion element.
  • the illumination device is part of a motor vehicle headlight. Again, the advantages explained above can be achieved.
  • the object mentioned at the outset is further achieved by a method for pixel-wise, pixel-individually controllable light emission into the environment by means of a lighting device in order to produce in the surroundings of the illumination device an output light image formed from light pixels, the illumination device comprising:
  • At least one light-emitting device which has a matrix of individually controllable light-emitting pixel elements for generating an original light image formed from light pixels
  • a control device which controls the light emitting device and accordingly an individual Actuation of the individual light-emitting pixel elements performs, data describing a target light image of the light to be emitted, are supplied and determined by the control device from the supplied data under distortion of the target light image driving data for the light emitting device through which the light emitting device emits an original light image, compared to the Target image is recorded such that the magnification between the target light image and the original light image on the amount of the affected light pixels is non-uniform and at least to varies the factor - ⁇ 2.
  • the object mentioned at the outset is also achieved by a computer program with program code means set up to carry out a method of the previously described type when the computer program is executed on a computer.
  • the computer may be part of the control device of the illumination device, for example in the form of a microprocessor or microcontroller.
  • the computer program may be stored on a data carrier, eg in a memory of the control device.
  • Figure 6 the illumination device with an optic in a first embodiment
  • a lighting device for pixel-wise, pixel-individually controllable light emission into the environment, with a light emitting device 1, an optical system 2 and a control device 4. Also shown is a light source 5, which may be provided as a separate component, if the light emitting device 1 is not already has an integrated light source.
  • the light-emitting device 1 has a matrix of individually controllable light-emitting pixel elements 11, as shown in FIG.
  • the light emitted by the light emitting device 1 light 10 passes through the optics 2 and is emitted by this as radiated light 20 in the environment.
  • an output light image 3 is generated, which is derived from an original light image generated by the light emitting device 1.
  • the output light image 3 is not mapped on a plane level in all applications, eg in applications conditions of the illumination device in a motor vehicle headlight. To simplify the explanations, however, a projection of the output light image 3 in a plane plane is used here.
  • a separate light source 5 If a separate light source 5 is present, it radiates its light 50 onto the light-emitting device 1, which generates the light 10 emitted by it in accordance with the control of the individual light-emitting pixel elements 11.
  • the control device 4 is used to control the individually controllable light-emitting pixel elements 11 of the light-emitting device 1.
  • the control device 4 can be supplied with data via an interface 41, e.g. from a camera observing the environment, which describe a target image of the light to be emitted (desired image).
  • a distortion correction device 40 can be implemented in the control device 4 which corrects the data of the target light image received via the interface 41 with regard to the distortion to be expected by the optical system 2 and correspondingly distortion-corrected control data to the light emitting device 1 emits. In this way, the output light image 3 can be generated such that the target image is reproduced substantially without distortion.
  • FIG. 2 shows the light-emitting device 1 in plan view, so that the matrix structure of the individual, individually controllable light-emitting pixel elements 11 is recognizable. These are formed in the exemplary representation chosen here with identical size. However, the invention is also suitable for light-emitting devices with light-emitting pixel elements having different sizes exhibit.
  • the illustration according to FIG. 2 also shows the original light image 12 generated by the light emission device 1 with its light pixels 13, which corresponds to the pattern of the light emission pixel elements 11.
  • the optics 2 can be designed differently depending on the application. Accordingly, the light pixels 13 of the original light image 2 are differently converted into the output light image 3.
  • FIG. 3 shows an embodiment in which a one-dimensional Cartesian redistribution of the light pixel size and its brightness takes place by means of the optics 2. Shown is an output light image 3 with light pixels 31, in which the distortion takes place only in the horizontal spatial direction, i. uniformly large light pixels of the original light image are recorded in unevenly sized light pixels 31 in the horizontal spatial direction.
  • a suitable optical system can be realized by optical elements that are curved in one direction only, so that the output light image 3 is distorted in one direction only, here the x-direction. To obtain a sharp image in the original light image, e.g.
  • magnification in this example depends only on a spatial coordinate, e.g. the y-coordinate or, as shown in Figure 3, of the x-coordinate.
  • FIG. 4 shows a two-dimensional Cartesian redistribution of the light pixels in the output light image 3.
  • a redistributing optical element curved in a spatial direction is used in each case. It is also possible to share single or all optical elements of the optics for both spatial directions.
  • the magnification is a function of x and y. It is not mandatory that the axes x and y in the output light image are perpendicular to each other.
  • FIG. 5 shows an embodiment in which a redistribution of the brightness and the resolution to the center of the output light image is generated by the optics.
  • the Brightness generated in this case can be reciprocally proportional to the size of a light pixel 31 shown here in the case of a homogeneously illuminating light-emitting device 1.
  • the optical system used for this purpose causes a rotationally symmetrical distortion of the original light image to the output light image.
  • the magnification is dependent on the distance from the center of the image, ie the respective radius.
  • FIG. 6 shows the illumination device in a view from above, i. perpendicular to the x-axis. Recognizable are the spatial directions y and z.
  • the light 10 emitted from the light emitting pixel elements 11 of the light emitting device 1 is transmitted through an optical collecting element, e.g. a converging lens 21, initially bundled again. This would initially result in an unrecognized image of the original light image 12, as represented by the pixels 25.
  • an optical collecting element e.g. a converging lens 21
  • This imaginary intermediate image plane is distorted as shown by the pixels 24.
  • the illustrated optical elements 21, 22, 23 may each also be implemented as a plurality of individual optical elements, e.g. Lenses, be formed.
  • FIG. 7 shows a further embodiment of the illumination device with another embodiment of the optics 2.
  • the optical collection element 21 is again recognizable.
  • This is an optical distortion element 22 in the light beam path, e.g. a recording lens, downstream of which the light is emitted to form the output light image 3.
  • the optical distortion element 22 is in this case formed as an element which combines the functions of the optical elements 22, 23 according to FIG.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mathematical Physics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un dispositif d'éclairage pour une diffusion, dans l'environnement du dispositif d'éclairage, d'une lumière dépendante de pixels et commandable pour chaque pixel afin de générer dans l'environnement du dispositif d'éclairage une image lumineuse de sortie (3) formée de pixels de lumière (31). Le dispositif d'éclairage comprend ce qui suit : a) au moins un système d'émission de lumière (1) qui comprend une matrice faite d'éléments de pixels d'émission de lumière commandables individuellement (11) servant à la génération d'une image lumineuse d'origine (12) formée de pixels de lumière (13) ; b) au moins un système optique (2) ayant plusieurs éléments optiques (21, 22, 23) dans la trajectoire de lumière du système d'émission de lumière (1) vers la lumière (20) rayonnée dans l'environnement, l'image lumineuse d'origine (12) générée par le système d'émission de lumière (1) étant convertie par les éléments optiques (21, 22, 23) en l'image lumineuse de sortie (3). Le dispositif d'éclairage est caractérisé en ce que c) le système optique (2) est conçu en tant que système optique déformant l'image lumineuse d'origine (12), qui déforme des pixels de lumière uniformément grands (13) de l'image lumineuse d'origine (12) en des pixels de lumière inégalement grands (31) dans l'image lumineuse de sortie (3), l'échelle de reproduction entre l'image lumineuse (3) et l'image lumineuse d'origine (12) est inégale selon la quantité des pixels de lumière (13), influencés par le système optique (2), de l'image lumineuse d'origine (12) et varie au moins du facteur (I).
PCT/EP2017/054034 2016-03-01 2017-02-22 Dispositif d'éclairage et procédé d'éclairage ainsi que programme d'ordinateur Ceased WO2017148764A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016103649.8 2016-03-01
DE102016103649.8A DE102016103649B4 (de) 2016-03-01 2016-03-01 Beleuchtungseinrichtung und Beleuchtungsverfahren sowie Computerprogramm

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WO2017148764A1 true WO2017148764A1 (fr) 2017-09-08

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CN113474630A (zh) * 2019-03-01 2021-10-01 法雷奥照明公司 用于校正光图案的方法、汽车照明设备和汽车照明组件
CN114502426A (zh) * 2019-10-04 2022-05-13 法雷奥照明公司 用于调节机动车辆的数字照明单元的设定点的方法
CN114981591A (zh) * 2019-12-20 2022-08-30 法雷奥照明公司 用于投影光束的系统

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DE102023129028A1 (de) * 2023-10-23 2025-04-24 HELLA GmbH & Co. KGaA Scheinwerfer für Fahrzeuge und Grundauslegungsverfahren

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CN113474630A (zh) * 2019-03-01 2021-10-01 法雷奥照明公司 用于校正光图案的方法、汽车照明设备和汽车照明组件
CN114502426A (zh) * 2019-10-04 2022-05-13 法雷奥照明公司 用于调节机动车辆的数字照明单元的设定点的方法
CN114981591A (zh) * 2019-12-20 2022-08-30 法雷奥照明公司 用于投影光束的系统
JP2023507197A (ja) * 2019-12-20 2023-02-21 ヴァレオ ビジョン 光ビームを投射するためのシステム
JP7462049B2 (ja) 2019-12-20 2024-04-04 ヴァレオ ビジョン 光ビームを投射するためのシステム
US12203620B2 (en) 2019-12-20 2025-01-21 Valeo Vision System for projecting a light beam

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