WO2018095718A1 - Répartition d'une distribution de lumière totale dans des modules de phare individuels avec prise en compte de propriétés de technique d'éclairage spécifiques et de dysfonctionnements - Google Patents

Répartition d'une distribution de lumière totale dans des modules de phare individuels avec prise en compte de propriétés de technique d'éclairage spécifiques et de dysfonctionnements Download PDF

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Publication number
WO2018095718A1
WO2018095718A1 PCT/EP2017/078336 EP2017078336W WO2018095718A1 WO 2018095718 A1 WO2018095718 A1 WO 2018095718A1 EP 2017078336 W EP2017078336 W EP 2017078336W WO 2018095718 A1 WO2018095718 A1 WO 2018095718A1
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WO
WIPO (PCT)
Prior art keywords
light
pixel
light distribution
module
pixels
Prior art date
Application number
PCT/EP2017/078336
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German (de)
English (en)
Inventor
Boris Kubitza
Udo Venker
Carsten Wilks
Original Assignee
HELLA GmbH & Co. KGaA
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.)
Filing date
Publication date
Application filed by HELLA GmbH & Co. KGaA filed Critical HELLA GmbH & Co. KGaA
Publication of WO2018095718A1 publication Critical patent/WO2018095718A1/fr

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Classifications

    • 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
    • B60Q1/143—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
    • 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
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
    • F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices

Definitions

  • the invention relates to a headlamp module, a method and a
  • Computer program product for adjusting a headlamp module, in which the luminous intensity of a pixel is adjusted so that a predetermined
  • Illuminance at the overlap point is achieved with a second pixel.
  • Lighting systems are primarily determined by optical elements such as lenses, reflectors and the light source itself.
  • An adaptation of the light distribution (low beam, high beam) while driving is not always possible.
  • Headlamp technology is increasingly in the direction of high-resolution headlamps, with which theoretically any light distribution can be generated.
  • the advantage of such systems is the high flexibility of light generation achieved by relatively high horizontal and vertical resolution of individually controllable pixels. Due to the high spatial resolution, existing light functions such as to further optimize the "glare-free high beam” or to enable new lighting functions.
  • Headlight technology the ability to make settings pixel-wise adaptive, creating new opportunities.
  • the invention was based on the object of making the illumination more pleasant and safer for the viewer, by illuminating as many areas as possible with a desired brightness.
  • the illumination more pleasant and safer for the viewer, by illuminating as many areas as possible with a desired brightness.
  • the term solid angle describes a proportion of the entire space, which protrudes from an origin in an angularly fanning manner in the room.
  • the legs of a 2D angle here are surfaces that usually describe the mantle of a cone or a pyramid.
  • Conventional light that is emitted in an oriented direction usually fills a solid angle and no line, since conventional light from a point light source would never be exactly aligned even with a diaphragm, as would be the case, for example, with laser light.
  • it can also be referred to as a 3D solid angle.
  • the luminous flux (in lumens) denotes the visible light output per second.
  • the light intensity refers to the luminous flux, which falls into a certain solid angle.
  • the illuminance indicates the luminous flux that strikes a certain surface.
  • the illuminance on an illuminated surface indicates which luminous flux (measured in lumens, Im) falls on a unit area (measured in square meters, m 2 ).
  • this also means the desired light value, which indicates how much light should arrive on the given surface.
  • the luminance refers to the luminous flux that is radiated from a surface or reflected / reflected. In the present case, this also means the actual light value that is visible from the vehicle, ie the brightness or
  • an area refers to the projection area, d. H. the part of a
  • This area is illuminated by the light, ie it unfolds its illuminating effect through reflection.
  • the reflected light is at least partially closed sent back to a potential viewer.
  • the proportion of the returned light is described by the degree of reflection or absorption.
  • the light distribution refers to the spatial distribution of the light or the
  • the total light distribution refers to the spatial distribution of the entire lighting device, while the light distribution can refer to areas or individual lighting elements.
  • the environment refers to the area ahead, which is potentially illuminable by the lighting device, also called scene or scenery. This is the direction in which a vehicle usually travels.
  • a lighting device has the ability to illuminate a region of the environment or to send one or more light streams in the direction of the environment.
  • This can classically include one or more headlights, in a vehicle, in particular the headlights, which serve to illuminate the environment.
  • Sense of lighting is usually that the driver or a camera an evaluable optical image or impression of the environment
  • a lighting device can also comprise only a part of a lighting system, such as a single headlamp module, or even just a group / array / segment of lighting elements within a headlamp or headlamp module.
  • a headlamp module is usually a structural unit and comprises at least one lighting element.
  • a lighting element is a device that emits light in a luminous flux
  • Lighting elements or arrays / modules / segments of lighting elements are substantially independently controllable in the light intensity.
  • the controllability may include simple on / off switching.
  • the effective range of the lighting device is subdivided by the lighting elements into many small areas (pixels).
  • a light distribution is generated within the effective range by selectively driving the individual pixels, which can be changed accordingly.
  • High resolution means that the light generated by the lighting device
  • Light distribution is divided into several areas (eg, pixels or pixel arrays), which can be independently controlled.
  • the number of pixels z. B. more than 100 or 1000 or 10,000 or 100,000. With such a lighting device, new lighting functions can be realized or
  • a lighting element may comprise a single independently controllable light source with a emitted luminous flux. This is z.
  • a device may be meant, which converts light from a light source, which feeds a plurality of lighting elements, into an independently controllable luminous flux without influencing the light source itself. This is z.
  • An LCD lighting device has one or more light sources, in whose beam path an LC display or an LCD screen is introduced.
  • the LCD can have a resolution in lines and columns and is ideally high resolution.
  • the area which can be illuminated by the illumination device is given the same resolution as the LCD.
  • the desired light distribution is generated.
  • the light source of the LED lighting device has an LED matrix or LED pixel array, ie the light source consists of many individual individually controllable LEDs, usually arranged in rows and columns. Due to different brightness levels of the individual LEDs, which are usually dimmable in steps or infinitely variable, the desired light distribution can be set.
  • a DMD lighting device based on micro-mirror actuators
  • DLP lighting device digital light processing
  • the light beam is decomposed into pixels by an array of movable micromirrors and then reflected pixel by pixel either into the projection path or out of the projection path.
  • the object is achieved in particular by a method for adjusting a headlight module with at least a first pixel, which emits a first light beam with an adjustable light intensity. Meanwhile, a second pixel emits a second light beam, wherein an overlap point at the intersection of the first and second light beams is illuminated.
  • Light intensity of the first pixel is set so that a predetermined
  • Illuminance is achieved at the overlap point.
  • Headlamp module which is suitable for carrying out the method.
  • a computer program product for adjusting a headlight module is the subject of the invention. It is envisaged that the
  • Computer program product is designed such that it can perform a method according to the invention.
  • Headlamp module are used.
  • the generation of a light distribution is no longer predetermined solely by the optical system, but can by
  • the light distribution is generated from the superposition of individual pixels. Ie. each pixel has some influence or contribution to the light distribution. So that the "target total light distribution" is achieved as well as possible
  • the method calculates the necessary proportion of the individual pixel at the desired light distribution or the individual modules at the target Overall light distribution. By changing the pixel setpoints, the influence of the pixels on the light distribution can be adjusted.
  • Each headlight or light module has individually addressable
  • (controllable) pixels that can be switched on, off or dimmed accordingly. Based on the specification of a desired total light distribution, nominal values for the light intensity or light distribution of the pixels of the respective headlight module can be calculated.
  • the first pixel is part of the first headlight module.
  • the second pixel can also be part of the first headlight module, but it does not have to be.
  • the light beam can spread in a solid angle and z. B. form a conical or pyramidal shape. In an idealized modeled form, it forms a beam with a constant cross-section, z. B. a cylindrical shape.
  • the overlap point refers to the space occupied by two beams of light. This happens where two light beams intersect and form an intersection. In the idealized case, of two infinitesimally small rays of light, that would actually be a point. In reality, an overlap area would form or an overlap volume, in three-dimensional view, since real light rays also have a certain width. For the present
  • the light distribution here refers to the resulting light intensity of the light of the first and second pixels in an overlap point.
  • the total light distribution here denotes the spatial distribution of the light, or the light intensity, that is, the light distributions of several or all pixels.
  • the overlap area is the area, or the area or volume, which both headlamp modules illuminate together. It therefore essentially corresponds to the sum of all overlap points.
  • the second pixel is located in a second headlight module and the light intensity (second light intensity) of the second pixel is adjustable.
  • the first and second light intensity is adjusted so that the predetermined illuminance is achieved.
  • both pixels can be influenced.
  • the defect of one the other pixel can be adjusted as appropriate as possible.
  • both headlight modules can be made identical.
  • the second pixel is either independent of the first pixel adjustable or dependent. In the latter case, for.
  • a reciprocal of the first value may be set.
  • the setting can be made proportionally, wherein the proportion of 0-100% of the light output of the respective pixel can be.
  • the total light distribution of a high-resolution headlamp is generated by the spatial arrangement and possibly superposition of the light distribution of individual light modules.
  • the individual headlight can consist of one or more individual light sources or light modules.
  • Brightness transition or with reinforced or attenuated lighting of objects or the road are highlighted.
  • the two headlamp modules may be the right and left headlamps (headlamps) of a vehicle.
  • headlamps headlamps
  • it may also be a high beam, low beam, city light module or a module for another specific light distribution.
  • module types for different types of lighting it is possible to consider the overlays of more than two headlamp modules.
  • a distribution of the desired total light distribution on the individual headlight or light modules can take place.
  • Headlight module or the first pixel measured and lighting properties determined.
  • the photometric properties include in particular system limits, such as the maximum brightness (illuminance), light output, and luminous flux. Also solid angle, direction of the light beam, wavelength, black level, voltage brightness curve can be, for example, other photometric properties.
  • the maximum brightness can be z. B. by projection on a standard wall at a certain distance and back measurement by means of suitable sensors (eg camera) are performed.
  • Measurements can be made ex works, continuously with a camera, eg. As an onboard camera, be performed at regular intervals or at engine start.
  • the individual headlights (modules), or the at least one pixel or several or all pixels are measured by lighting technology, so the maximum properties of the individual headlight module are known. Ie. There is a clear correlation between the radiated angle (solid angle) and the maximum achievable illuminance. The photometric properties are thus known and can be deposited accordingly in the software.
  • nominal values for one pixel can be determined and adjusted as a function of the photometric properties of other pixels. For example, to achieve a homogeneous illumination, all setpoints can be set to the maximum brightness of the least luminous pixel.
  • an alignment and position of the headlight module in the vehicle is taken into account in the method.
  • Installation position or the distance between the two pixels (in the cutting plane) to each other determining at which point the point of overlap arises, ie at which distance in advance direction, or at which distance from the headlamp module.
  • a malposition of the individual pixels or of the headlight module is detected in the method.
  • a malposition of the pixels or of a headlight module can occur. This leads to the fact that not exactly the first with the originally provided second pixel forms an overlap point at a certain point. Instead, a failed pixel can not form an overlap point or form an overlap point with the intended second pixel, but at a different location (i.e., at a different distance) or an overlap point with a different than the intended second pixel.
  • nominal values for the individual light modules can be calculated taking into account the malposition of individual pixels or pixel areas.
  • a distribution of the desired total light distribution to the individual light modules taking into account the malposition of individual pixels or pixel areas take place. If individual pixels or light modules are misaligned, the calculation of the setpoint values (light values) is adjusted so that the "target total light distribution" is achieved as well as possible.
  • a malfunction or failure of individual pixels or pixel areas is detected in the method.
  • a method for calculating a pixel-based light distribution is made possible, taking into account the specific lighting headlight properties and malfunctioning of individual pixels or segments.
  • the first or second pixel assumes the light output of the other pixel if that, e.g. B. for the reasons mentioned, fails.
  • Defective position of the headlamp nominal values (light intensity) calculated for the individual light modules or pixels.
  • the light intensity, or the luminous flux in more than 2 stages or continuously or continuously or dimmable, adjustable.
  • headlight modules with LED technology are used. These are particularly suitable for dimming and can thus implement setpoint values steplessly and thus particularly precisely in a luminous flux.
  • the adjustment is carried out in a distance-dependent manner in the method.
  • the entire light distribution will vary depending on the distance different.
  • a surface eg. Wall or street
  • the influence of individual pixels or light modules on the total light distribution is distance-dependent and can be taken into account accordingly in the calculation of the total light distribution.
  • two other pixels may form the overlap point than at a different distance.
  • the distance between the point or areas on which the light beam impinges and the headlamp module are taken into account. This can be achieved by a method for controlling a headlight module for a vehicle that illuminates an environment of the vehicle, wherein the
  • Headlamp module has a first pixel, each of which can emit an independently dimmable or switchable luminous flux in a solid angle and thus illuminates an area in the area with an illuminance, the
  • Illuminance is adjusted depending on the distance of the point or surface to the headlamp module.
  • the illumination intensity is additionally set as a function of the luminance in the method.
  • the target light values can be corrected according to the returned light intensity (luminance).
  • the reflected light can be detected by means of a suitable sensor (eg a camera) z. B. be measured by an intensity measurement. Ideally, this can be done using the same camera as for determining the distance.
  • a homogeneous light distribution, or a constant luminance for at least a portion of the environment can be set. Furthermore, the illuminance can be reduced if the luminance is too high. Furthermore, the illuminance can be increased if the luminance is too low.
  • FIG. 2 shows the influence of individual light modules on the total light distribution in FIG.
  • 3b setpoint values for the light distribution of the right-hand headlight module, 3c setpoints of a resulting light distribution,
  • 4a shows a flowchart for determining the nominal values of individual light modules taking into account the maximum headlight system limits
  • 4b is a flowchart for determining the setpoint values of individual light modules taking into account the failure detection, malposition and maximum
  • Fig. 5 shows a breakdown of the total light distribution to the individual light modules, taking into account failed pixels or pixel areas in a simplified representation.
  • FIG. 1 shows a superimposition of individual pixel-based light modules on one
  • Projection screen (schematic diagram).
  • a left headlight module 1 1 and a right headlight module 12 with the respective pixel matrix are shown, which cast their overall light distribution on a projection plane 13. This is a
  • a single pixel 1 6 in the right headlight module 12 is not located in
  • Overlap area 14 and is visible as a single pixel on the screen to the right.
  • Another first pixel 15b of the right-hand headlamp module 12 casts light on the overlapping area 14 in the form of a pixel 17.
  • the associated second pixel 15a in the left-hand headlamp module 11 sheds light at the same location 17 of the overlapping area 14.
  • the resulting illuminance of the pixel 17 is determined thus the sum of the illuminance levels of the first pixel 15b and the second pixel 15a.
  • FIG. 2 shows the influence of individual light modules on the overall light distribution in a simplified representation.
  • the proportion 21 of the left headlight module is shown in the total light distribution over the proportion 22 of the right headlight mode on the total light distribution, which in turn are shown over the total light distribution 23 at superposition of both headlights.
  • the abscissa represents the horizontal position of a number of headlight pixels, the ordinate the
  • FIGS. 3 show desired values for the light distribution of the left and right
  • Headlamp module and a resulting total light distribution projected on a 25 m wall In this case, for example, a desired total light distribution for a
  • High-resolution LED matrix system consisting of a dipped beam and
  • Figure 3a shows the light distribution of the left and Figure 3b shows the light distribution of the right module.
  • the result of the superimposition of both headlights is shown in the entire light distribution in FIG. 3c.
  • the light distribution was projected onto a wall at a distance of 25 m.
  • Alpha and Beta indicate the solid angles of the individual pixels.
  • the scale on the right shows an Iso Lux value.
  • FIG. 4a shows a flowchart for determining the setpoint values of individual
  • the "proportion of individual modules in the total light distribution" 401, 41 6 is determined according to the following procedure:
  • the generation of a total light distribution by superposition of individual pixels / segments from different light modules is done by: - "Calculation of a situation-dependent adaptive target total light distribution" (default) 412, 428.
  • FIG. 4b shows a flowchart for determining the nominal values of individual
  • the total light distribution over the individual light modules taking into account the misalignment of individual pixels or pixel areas. If individual pixels or light modules are misaligned, the calculation of the setpoint values is adjusted so that the "target total light distribution" is achieved as well as possible. The same applies to the division of the "target total light distribution" on the individual light modules, taking into account the headlight position (position and orientation) in the vehicle.
  • FIG. 5 shows a breakdown of the total light distribution onto the individual light modules, taking into account failed pixels or pixel regions in a simplified representation.
  • Total light distribution over the portion 52 of the right headlight mode shown in the total light distribution which in turn are shown over the total light distribution 53 at superimposition of both headlights.
  • the abscissa represents the horizontal position of a number of headlight pixels, the ordinate the light value. This would be at a uniform division between the pixels at 50%. If one pixel 54 fails, this would be 0% and will be compensated for by driving the second pixel 55 with the double light value of 100%. This correction causes a constant light distribution, as shown in FIG. 53, despite the defective pixel 54.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

L'invention concerne un module de phare (12), un procédé et un produit-programme informatique pour régler un module de phare (12) comportant au moins un premier pixel (15b) émettant un premier faisceau lumineux avec une intensité lumineuse réglable. Pendant ce temps, un deuxième pixel (15a) émet un deuxième faisceau lumineux, un point de chevauchement (17) étant illuminé au niveau de l'intersection du premier et du deuxième faisceau lumineux. L'intensité lumineuse du premier pixel (15b) est réglée de manière qu'une intensité d'éclairage prédéfinie soit atteinte au niveau du point de chevauchement (17).
PCT/EP2017/078336 2016-11-22 2017-11-06 Répartition d'une distribution de lumière totale dans des modules de phare individuels avec prise en compte de propriétés de technique d'éclairage spécifiques et de dysfonctionnements WO2018095718A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016122499.5 2016-11-22
DE102016122499.5A DE102016122499A1 (de) 2016-11-22 2016-11-22 Aufteilung einer Gesamtlichtverteilung auf einzelne Scheinwerfermodule unter Berücksichtigung spezifischer lichttechnischer Eigenschaften und Fehlfunktionen

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Publication Number Publication Date
WO2018095718A1 true WO2018095718A1 (fr) 2018-05-31

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PCT/EP2017/078336 WO2018095718A1 (fr) 2016-11-22 2017-11-06 Répartition d'une distribution de lumière totale dans des modules de phare individuels avec prise en compte de propriétés de technique d'éclairage spécifiques et de dysfonctionnements

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WO (1) WO2018095718A1 (fr)

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DE102018123407A1 (de) * 2018-09-24 2020-03-26 HELLA GmbH & Co. KGaA Scheinwerfer, insbesondere für Kraftfahrzeuge, mit einer LED-Matrix
DE102018129250A1 (de) * 2018-11-21 2020-05-28 HELLA GmbH & Co. KGaA Verfahren und Vorrichtung zum Ermitteln von Einstellungswerten für Beleuchtungsstärken für Lichtquellen eines Scheinwerfers aus einer einzustellenden Lichtverteilung
EP3670262A1 (fr) * 2018-12-19 2020-06-24 Valeo Vision Procédé de correction d'un motif lumineux et ensemble de dispositif d'éclairage automobile
EP3670261B1 (fr) * 2018-12-19 2023-04-19 Valeo Vision Procédé de correction d'un motif lumineux et ensemble de dispositif d'éclairage automobile
EP3730836A1 (fr) * 2019-04-25 2020-10-28 Valeo Vision Procédé de fourniture d'un motif lumineux, dispositif d'éclairage automobile et ensemble d'éclairage d'automobile
JP2020189608A (ja) * 2019-05-24 2020-11-26 スタンレー電気株式会社 車両用灯具
DE102019118381A1 (de) 2019-07-08 2021-01-14 HELLA GmbH & Co. KGaA Beleuchtungsvorrichtung und Homogenisierungsverfahren für Fahrzeuge
DE102020119672B3 (de) 2020-07-27 2022-01-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren und System zu einer faktorbasierten Aufhellung von Projektionsbereichen
DE102020123813A1 (de) 2020-09-14 2022-03-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zum Einstellen eines Scheinwerfers eines Fahrzeugs und Scheinwerfer
DE102020129546A1 (de) 2020-11-10 2022-05-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zur Projektion einer Lichtverteilung auf eine Fahrbahn vor einem Kraftfahrzeug
DE102021116084A1 (de) 2021-06-22 2022-12-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zur Steuerung eines Scheinwerfers eines Kraftfahrzeugs
KR102557393B1 (ko) 2021-08-23 2023-07-19 현대모비스 주식회사 램프 및 표시 장치
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EP2813395A1 (fr) * 2013-06-11 2014-12-17 Valeo Vision Projecteur pour véhicule automobile comprenant une source de lumière laser et procédé de réalisation d'un faisceau d'éclairage
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