EP2771613B1 - Module d'éclairage destiné à un véhicule automobile - Google Patents

Module d'éclairage destiné à un véhicule automobile Download PDF

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Publication number
EP2771613B1
EP2771613B1 EP13708335.8A EP13708335A EP2771613B1 EP 2771613 B1 EP2771613 B1 EP 2771613B1 EP 13708335 A EP13708335 A EP 13708335A EP 2771613 B1 EP2771613 B1 EP 2771613B1
Authority
EP
European Patent Office
Prior art keywords
lens
lens portion
illumination
light
module according
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.)
Active
Application number
EP13708335.8A
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German (de)
English (en)
Other versions
EP2771613A1 (fr
Inventor
Dietmar KIESLINGER
Andreas Moser
Friedrich Bauer
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.)
ZKW Group GmbH
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ZKW Group GmbH
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Filing date
Publication date
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Publication of EP2771613A1 publication Critical patent/EP2771613A1/fr
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Publication of EP2771613B1 publication Critical patent/EP2771613B1/fr
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Classifications

    • 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
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • 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]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • 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
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • 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
    • F21S41/24—Light guides
    • 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
    • F21S41/26—Elongated lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs

Definitions

  • the invention relates to a lighting module for a motor vehicle with the features of the preamble of claim 1.
  • the invention further relates to a vehicle headlight with at least one such lighting module.
  • light from the at least one lighting unit is deflected in the forward direction of the lighting module by a lens arranged on the front of the lighting module and emitted onto the roadway, where it can form a defined light distribution pattern, such as a low beam distribution or a high beam distribution.
  • the light distribution is essentially influenced by the design of the lens used. It is known that imaging errors are unavoidable in spherical lenses. Accordingly, in order to be able to at least partially correct such lens errors, aspherical lenses are used. As a rule, a compromise must always be found as to which imaging errors are (more) corrected in favor of other imaging errors.
  • the problem can arise in particular with a lighting module described at the beginning that an undesired gap occurs due to the thickness (in the vertical direction) of the diaphragm in the high beam distribution. It is an object of the invention to provide a solution to this problem.
  • Headlights are usually designed for an image distance (distance of the image plane) of 25 meters, e.g. according to the ECE regulation.
  • Other regulations e.g. in the USA (SAE regulation), however, provide for a width of 10 meters, for which a headlight is to be designed.
  • SAE regulation e.g. in the USA
  • At least two lens areas differ with regard to the calculation rules on which they are based in at least one of the above-mentioned parameters, which are included in the respective calculation rule.
  • the division into lens areas takes place on the light entry surface of the lens.
  • the light entry surface is flat over all areas, while the light exit surface has a different curvature depending on the lens area, etc.
  • the individual lens areas of the lens differ from one another both on the light entry surface and on the light exit surface.
  • the transition between two adjacent areas on the light exit surface is continuous. This results in a flowing, soft transition, the is aesthetically pleasing, which can be particularly advantageous for the outside of the lens. In addition, such a surface is easy to manufacture.
  • transition between two adjacent areas on the light exit surface is discontinuous, for example in the form of a staircase. Such transitions are easier to calculate.
  • the range limits are clearly recognizable, but undesirable stray light may occur at the steps or the steps can be perceived as less visually appealing.
  • any combination is possible, such as continuous transition (continuous transitions) on one side, discontinuous transition or discontinuous transitions on the other side or even continuous transition between two areas on one side and discontinuous transition between two other areas on the same side, etc. .
  • the lens is divided into two, three or four lens areas.
  • the individual parameters that flow into a calculation rule can each be constant for a lens area. However, it can also be provided that one, several or all parameters of a calculation rule for a lens area vary as a function of the position of the lens area being considered.
  • an image generated by this lens area can be deliberately blurred or shifted, for example.
  • the lens area under consideration is computationally composed of a large number of smaller lens sub-areas, for example of several hundred such sub-areas, which when combined then form the lens area.
  • Such parameters that are variable over a lens area typically change continuously, for example linear, quadratic, sigmoid, etc.
  • a lens according to the invention can be optimally used if it is further provided that defined light emission areas of a lighting unit are only in a defined, assigned lens area or in two or more defined, assigned lens areas the lens emit light. In this way, the lighting unit and the lens or the areas assigned to one another can be optimally matched to one another.
  • each lighting unit emitting light only in at least one, two or more lens areas, preferably exactly one defined lens area of the lens.
  • the at least one lighting unit comprises at least one reflector and at least one light source assigned to the at least one reflector.
  • the (different) light emission region or regions are formed by the reflecting surface or surfaces of the reflector or reflectors and / or by two or more such lighting units.
  • Figure 1 shows a lighting module, specifically an LED bi-function projection module 1, which comprises a lighting device 2 and a lens 3.
  • the lighting device 2 consists of an upper reflector 20, to which a light source 22 in the form of one or more LEDs is assigned (reflector 20 and light source 22 form the upper lighting unit 2a), and a lower reflector 21 with a light source 23, also in the form of one or more LEDs (reflector 21 and light source 23 form a second, lower lighting unit).
  • the two light sources 22, 23 can preferably be controlled separately.
  • the light sources 22, 23 lie essentially in a focal point of the assigned reflector 20, 21.
  • the focal plane of the lens 3 runs approximately or exactly through the second focal points of the two reflectors 20, 21.
  • a (in this case rigid) horizontal diaphragm 24 is provided, the optically effective edge of which faces the lens 3 in order to produce a light-dark boundary.
  • a low beam distribution LVb as in FIG Figure 1a are generated, a part LVa of a high beam distribution is generated via the lower lighting unit 2b, the overall light distribution (entire high beam distribution) when the upper and lower lighting unit is activated is designated LV.
  • a lens 30 modified compared to lens 3 is used according to the invention.
  • the lens 30 has two lens areas 30a, 30b, the lower lens area 30b from the lower section of the lens 3 (that section which lies below the optical axis X of the module) Figure 1 corresponds to.
  • the upper lens region 30a is tilted in relation to the “original” lens contour of the lens 3 in the direction of the lighting units 2.
  • the light entry surface 30a ' which is also tilted towards the optical axis X, is "parallelized" to the flat light entry surface of the lens area 30b, that is, the light entry surface represents a continuous plane which is preferably normal to the axis X.
  • the upper lens half looks as if its axis had been shifted downwards in parallel and its center thickness had been slightly increased.
  • the lens areas therefore only differ in terms of the light exit surface, the two lens areas 30a, 30b merging into one another discontinuously at the light exit surface, for example as shown.
  • An unsteady transition offers the best use of space, but it is more difficult to create.
  • a "rounded", steady transition on the other hand, is easier to manufacture, but can, under certain circumstances, lead to scattered light.
  • the lens 30 corresponds to an asphere like the lens 3 from Figure 1 , these form a light distribution LVb 'as in Figure 2a shown which in the shape and position of the light distribution LVb Figure 1a corresponds to.
  • the lens area 30a is optimized in such a way that the light beams are refracted more downwardly the further up a light beam passes through the lens area 30a.
  • the light distribution LVa 'generated over the upper lens region 30a is shifted downwards, as a result of which the gap S is opened out Figure 1a concludes like this in Figure 2a is shown, so that a closed (long-range) light distribution LV 'results.
  • the lower lighting unit 2b only uses a certain area of the lens 30 to generate the high beam distribution, preferably only the upper area 30a.
  • Light from the upper lighting unit 2a can in principle pass through the entire lens 30, but the low beam preferably passes through other areas of the lens (namely through the lower sub-area 30b) than the high beam.
  • the two lens areas 30a, 30b are thus preferably each illuminated by their own lighting unit 2a, 2b assigned to the respective lens area 30a, 30b, with each lighting unit 2a, 2b preferably emitting light only into the lens area 30a, 30b assigned to it.
  • the lens 30 off Figure 2 thus has two different lens regions 30a, 30b which have different imaging properties and are based, for example, on different calculation rules, that is to say, for example, were determined by means of different calculation rules.
  • the two calculation rules differ in the parameter that the "optical axis" of the area 30a has been tilted with respect to the module axis X (see FIG Figure 2b , Tilting by angle a), while the optical axis of the lower region 30b continues to run parallel to the X axis.
  • the resulting lens 30 accordingly no longer has a clear optical axis.
  • the optical axis of the area 30a in the example shown is tilted by approx. 1.3 ° relative to the module axis X, as shown in FIG Figure 2b is sketched.
  • Figure 2b illustrates the process of how the upper region 30a of the lens 30 is calculated / generated. This is based on a lens 3 Figure 1 (left lens in Figure 2b ) and tilts it by the angle a. This results in the in Figure 2b right, tilted lens, the area above the X axis of which forms the contour of the light exit surface of the lens 30.
  • the light entry surface of the upper area is tilted against the axis X at an angle not equal to 90 °.
  • This light entry surface is "straightened" (mathematically or during production) so that a continuously flat light entry surface results in the resulting lens 30, as already described above.
  • this is equivalent to shifting the lens axis parallel downwards and slightly increasing the center thickness.
  • the invention makes it possible to implement a lighting module or a vehicle headlight with at least one such module with which legal regulations such as ECE, SAE, CCC, etc. can be met.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (10)

  1. Module d'éclairage (1) pour un véhicule automobile, en particulier module de projection pour un véhicule automobile, comprenant deux unités d'éclairage (2a, 2b), une unité d'éclairage supérieure (2a) et une unité d'éclairage inférieure (2b), et une lentille (30), de préférence une lentille de projection, la lumière émise par ladite au moins une unité d'éclairage (2a, 2b) sur la lentille (30) étant projetée par la lentille (30) - dans une condition installé du module d'éclairage - dans une zone située devant le véhicule automobile,
    chaque unité d'éclairage (2a, 2b) comportant un réflecteur (20, 21) et une source de lumière (22, 23) située à un point focal du réflecteur, et le module d'éclairage (1) comportant en outre un diaphragme horizontal (24) disposé sur un axe de module optique (X), dont le bord optiquement efficace fait face à la lentille (30), pour produire une ligne de coupure,
    la lentille (30) étant divisée en deux régions de lentille (30a, 30b), une région de lentille supérieure (30a) et une région de lentille inférieure (30b), la division en régions de lentille étant effectuée sur la surface d'entrée de la lumière de la lentille, et
    les zones des lentilles (30a, 30b) étant diffèrent quant à leurs propriétés d'imagerie, et, dans chaque région de l'objectif (30a, 30b), de la lumière étant irradiée uniquement à partir d'au moins une unité d'éclairage (2; 2a, 2b) associée à la région de lentille (30a, 30b),
    caractérisé en ce que
    un plan focal de l'objectif (30) passe par des seconds points focaux des deux réflecteurs (20, 21), et
    une distribution des faisceaux de croisement (LVb, LVb') est générée avec l'unité d'éclairage supérieure (2a) et la région de lentille inférieure (30b), et
    une partie d'une distribution de faisceau principal (LVa, LVa') est générée avec l'unité d'éclairage inférieure (2b) et la région de lentille supérieure (30a), et une distribution de faisceau principal (LV, LV') étant générée lorsque les deux unités d'éclairage (2a, 2b) sont activées,
    et, pour obtenir une distribution fermée du faisceau principal (LV'),
    la région de lentille supérieure (30a) est inclinée par rapport à l'axe du module (X) vers les unités d'éclairage,
    un axe optique de la région de lentille inférieure (30b) est parallèle à l'axe du module (X), et la lentille (30) a une surface d'entrée de la lumière plane.
  2. Module d'éclairage selon la revendication 1, caractérisé en ce que chaque région de lentille (30a, 30b) est conçue selon une règle de calcul, les deux régions de lentille (30a, 30b) de la lentille (30) étant diffèrent en ce qui concerne leur règle de calcul.
  3. Module d'éclairage selon la revendication 1 ou 2, caractérisé en ce qu'au moins un des paramètres suivants est utilisé pour calculer les propriétés d'imagerie des régions de l'objectif, par exemple en utilisant des règles de calcul :
    *) échelle d'imagerie (grossissement) de la zone de l'objectif ;
    *) position ou distance du plan de l'objet par rapport à la surface de l'objectif ;
    *) position ou distance du plan focal du côté de l'objet par rapport à la surface de l'objectif ;
    *) position ou distance du plan de l'image par rapport à la surface de l'objectif ;
    *) tirage optique de la zone de l'objectif ;
    *) orientation de l'axe optique de la zone de l'objectif ;
    *) selection de l'aberration à corriger.
  4. Module d'éclairage selon la revendication 3, caractérisé en ce que les deux régions de lentille (30) sont différent quant aux règles de calcul sur lesquelles elles sont basées dans au moins un des paramètres qui découlent de la règle de calcul respective.
  5. Module d'éclairage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la transition entre les deux régions de lentilles adjacentes est continue au niveau de la surface d'entrée de la lumière et/ ou de la surface de sortie de la lumière.
  6. Module d'éclairage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la transition entre deux régions adjacentes est discontinue à la surface de sortie de la lumière, par exemple en forme d'escalier.
  7. Module d'éclairage selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'un, plusieurs ou tous les paramètres d'une règle de calcul pour une région de lentille (30) varient en fonction de la position considérée de la région de lentille (30).
  8. Module d'éclairage selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'axe optique de la zone inclinée (30a) est incliné d'environ 1,3° par rapport à l'axe du module (X).
  9. Module d'éclairage selon l'une quelconque des revendications 1 à 8, caractérisé en ce que les surfaces de sortie de la lumière des régions de lentille (30a, 30b) se fondent de manière discontinue les unes dans les autres ou la transition est arrondie.
  10. Projecteur de véhicule comportant au moins un module d'éclairage selon l'une quelconque des revendications 1 à 9.
EP13708335.8A 2012-02-13 2013-02-12 Module d'éclairage destiné à un véhicule automobile Active EP2771613B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50031/2012A AT512468B1 (de) 2012-02-13 2012-02-13 Beleuchtungsmodul für ein kraftfahrzeug
PCT/AT2013/050034 WO2013120121A1 (fr) 2012-02-13 2013-02-12 Module d'éclairage destiné à un véhicule automobile

Publications (2)

Publication Number Publication Date
EP2771613A1 EP2771613A1 (fr) 2014-09-03
EP2771613B1 true EP2771613B1 (fr) 2021-04-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13708335.8A Active EP2771613B1 (fr) 2012-02-13 2013-02-12 Module d'éclairage destiné à un véhicule automobile

Country Status (4)

Country Link
EP (1) EP2771613B1 (fr)
CN (1) CN104040249B (fr)
AT (1) AT512468B1 (fr)
WO (1) WO2013120121A1 (fr)

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Also Published As

Publication number Publication date
EP2771613A1 (fr) 2014-09-03
CN104040249A (zh) 2014-09-10
AT512468B1 (de) 2014-01-15
CN104040249B (zh) 2019-11-05
AT512468A1 (de) 2013-08-15
WO2013120121A1 (fr) 2013-08-22

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