EP4001742A1 - Phares de véhicule - Google Patents

Phares de véhicule Download PDF

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Publication number
EP4001742A1
EP4001742A1 EP20209407.4A EP20209407A EP4001742A1 EP 4001742 A1 EP4001742 A1 EP 4001742A1 EP 20209407 A EP20209407 A EP 20209407A EP 4001742 A1 EP4001742 A1 EP 4001742A1
Authority
EP
European Patent Office
Prior art keywords
projection lens
projections
common
common projection
optical axis
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.)
Withdrawn
Application number
EP20209407.4A
Other languages
German (de)
English (en)
Inventor
Matthias Riesinger
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
Original Assignee
ZKW Group GmbH
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 ZKW Group GmbH filed Critical ZKW Group GmbH
Priority to EP20209407.4A priority Critical patent/EP4001742A1/fr
Priority to PCT/EP2021/080659 priority patent/WO2022111971A1/fr
Priority to CN202180079012.6A priority patent/CN116670427A/zh
Priority to EP21802735.7A priority patent/EP4251915A1/fr
Publication of EP4001742A1 publication Critical patent/EP4001742A1/fr
Withdrawn legal-status Critical Current

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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
    • F21S41/10—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
    • 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
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F21W2102/155—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having inclined and horizontal cutoff lines
    • 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
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F21W2102/16—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having blurred cut-off lines

Definitions

  • Such vehicle headlights have become known from the prior art.
  • a particular challenge when superimposing the light images of the two light modules is to design the superimposition in such a way that the transition between the light images is as seamless as possible. To do this, the light modules are carefully aligned in relation to the common beam stop.
  • a disadvantage of known headlights is that the transition can only be made sufficiently smooth by complex measures and/or gaps or color distortions in the transition area are acceptable.
  • the common projection lens has on its exit side a first deflection section which extends upwards and downwards transversely to the optical axis along the circumference of the projection lens and is arranged on the surface of the projection lens.
  • the exit side of the common projection lens is formed by projections arranged next to one another, which are each delimited by the connection of a first flank facing the optical axis and a second flank facing away from the optical axis, the totality of the projections being at least projections of a first type includes, in which these flanks are formed substantially asymmetrically to each other.
  • flanks are asymmetrical to one another means that the flanks are asymmetrical in relation to an axis that intersects the amplitude of the projection and is oriented normal to a tangent to the basic shape of the exit surface in the region of the projection.
  • the basic shape is again given by a smoothed geometric progression of the exit surface (i.e. a shape that would be given if the projections were flattened if they were omitted).
  • first deflection section extending upwards and downwards transversely to the optical axis along the periphery of the projection lens
  • deflection section has a vertical extent - which is clearly upwards and downwards with respect to a point lying within the section.
  • the section follows the surface curvature of the exit side of the lens.
  • the asymmetry of the projections of the first type is formed in that the second flank of the respective projection is formed flatter than its first flank.
  • the flanks do not necessarily have to have a constant gradient.
  • the asymmetry can apply to all protrusions.
  • the entirety of the projections comprises at least projections of a second type, in which the falling and the rising edge essentially are formed symmetrically to each other.
  • the expression "substantially” means that deviations of a maximum of 10% are permissible. It can also be provided that the entirety of all projections consists exclusively of projections of the first type and of the second type.
  • the optical axis of the common projection lens is oriented essentially horizontally, and the high beam module is offset downwards in relation to the beam shield and the low beam module is offset upwards in relation to the beam shield.
  • position information such as “top”, “bottom”, “horizontal” etc. always refers to an installation position of the headlight in which the headlight is installed in a vehicle which in turn is in a horizontal position.
  • the low-beam module and the high-beam module each have a main emission direction, with the two modules being inclined in relation to the optical axis of the common projection lens in such a way that their main emission directions enclose the same angle in relation to the optical axis of the common projection lens.
  • the expression "same angle” means that the absolute value of the angle is the same.
  • One of the light modules is therefore twisted up through an angle and the other light module is twisted down through the same angle. This means that light rays are parallel to each other at the light edge.
  • adjacent projections adjoin one another in the vertical direction along the circumference of the exit side of the common projection lens.
  • the first deflection section is arranged in a central area of the common projection lens.
  • the "central area” is understood to be an area which, starting from the point of intersection of the optical axis of the projection lens and the exit surface, extends upwards and downwards over a length of 25% of the circumference of the exit surface.
  • the first section comprises two subsections, with a first subsection above the optical axis of the common projection lens and a second sub-section is located below the optical axis of the common projection lens, wherein the asymmetry of the protrusions provided in the second sub-section is made stronger than the asymmetry of the protrusions provided in the first sub-section.
  • each subsection has protrusions of the first type, and these protrusions can be divided into a first and a second subtype, the protrusions of the two subtypes differing from one another at least in the geometric shape of the second flanks, in that the second flanks of the second subspecies are flatter on average than the second flanks of the first subspecies.
  • only projections of the first type are provided in the first section.
  • a flatter second flank means that the projection in question has a lower height in the case of the same width and the same first flank.
  • the projections of different subtypes are arranged alternately next to one another, in that each projection enclosed by adjacent projections is of a different subtype than its adjacent projections.
  • the edge areas can also be configured identically.
  • the projections in the second and third deflection sections are designed as projections of the second type, ie as symmetrical projections.
  • At least individual projections also have asymmetrically inclined flanks with respect to a horizontal extension along the common projection lens, and these projections are arranged next to one another, seen in the horizontal direction, along the circumference of the exit side of the common projection lens.
  • These projections can be arranged in a horizontal central area and/or an edge area of the exit side of the common projection lens.
  • all projections have a maximum height of 5 micrometers and a maximum width of 1 mm.
  • the ratio of the width of the projections to the height of the projections is in the range between 10 and 1000, in particular between 50 and 200.
  • the invention allows the creation of a microstructure for closing the gap and improving the gradient of headlight modules.
  • the microstructures formed from the projections
  • on the other hand to set a desired gradient profile and close the gap between low and high beam (the light from the low beam module is referred to as low beam and the light from the high beam module is referred to as high beam). ) in twin systems.
  • a wide variety of geometries and shapes of the microstructures can be used.
  • the lenses in many headlight modules are defocused in order to obtain a somewhat softer HD line or to reduce the gap between the low and high beam.
  • a further problem in the prior art can be the setting of the gradient, since the blurring was the same for both light distributions up to now.
  • This increases the blue portion of the HD line and increases the risk of a double gradient. Due to the presence of a uniform structure over the entire lens, it has not been possible to go into the different areas of the light distribution of the lens or to take its color distribution into account. This resulted in strong bluish HD lines and double gradients.
  • the double gradient is special in the adjustment process problematic because the module may then be set incorrectly and may not be legally correct.
  • the gradient curves of the current structures are relatively wide and do not have a defined global maximum, which can also lead to problems when setting up. According to the invention, therefore, the use of said asymmetrical projections in the context of the device according to claim 1 is provided.
  • the entire gradient of the distribution can be set more easily by treating the gradients of the blue and yellow components of the light distribution separately.
  • the asymmetric blurring can of course also be used in the horizontal direction, e.g. to prevent blurring from an asymmetry in the HV.
  • a vehicle headlight 1 comprising a low beam module 2 for generating a low beam distribution, the low beam module 2 for this purpose comprising at least one light source 2a.
  • the headlight 1 also includes a high-beam module 3 for generating a high-beam distribution, the high-beam module 3 including at least one light source 3a for this purpose.
  • the headlight 1 has a projection lens 4 and a beam shield 5 .
  • the two light modules 2 and 3 are assigned the projection lens 4 as a common projection lens 4 and the beam stop 3 as a common beam stop 3 .
  • the light sources 2a and 3a are each arranged in such a way that the beam stop 5 is in the beam path from the respective light source 2a or 3a to the common projection lens 4 in order to limit the light distribution emitted into the common projection lens 4, and the common projection lens 4 is arranged in the beam path of the two light modules 2 and 3 in such a way that the light beams emitted by the light modules 2 and 3 and passing through the common beam stop 5 can be imaged by the common projection lens 4 in the form of a superimposed light distribution onto a roadway, with the common Projection lens 4 has an optical axis z.
  • a bundle of rays L 1 is shown as an example of this, which at the end of the beam stop 5 in the form of the light beam L 1 ′ radiates past the stop 5 or in the form of the light beam L 1 ′′ impinges on the beam stop 5 and is reflected.
  • the common projection lens 4 has on its exit side 4 'a transverse to the optical axis z along the circumference of the projection lens 4 extending up and down first deflection section 4a, which is arranged on the surface of the projection lens 4, wherein in this first deflection section 4a the exit side 4' of the common projection lens 4 by means of projections 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h arranged next to one another (see 3 ) is formed, each of which is delimited by the connection of a first flank 6a′ facing the optical axis z with a second flank 6a′′ facing away from the optical axis z (example of projections see Figures 4 to 9 ), the set of projections comprising at least projections 6a, 6b, 6e, 6f, 6g, 6h of a first type, in which these flanks are formed substantially asymmetrically to one another.
  • the deflection portion 4a therefore lies on the surface of the projection lens 4 and includes said projections to deflect light.
  • the projections can be offset from one another in the vertical and/or horizontal direction. In particular, they can be arranged in a square grid. However, other shapes are also conceivable, such as an arrangement in a hexagon or even irregular shapes.
  • figure 2 shows the embodiment 1 with a second exemplary bundle of rays L 2 , which splits into a non-reflected light beam L 2 ' and a reflected light beam L 2 ".
  • a distance d between the parallel mutually oriented light beams L 1 'and L 2 " due to the expansion of the beam stop 5, a distance d between the parallel mutually oriented light beams L 1 'and L 2 ".
  • the spatial expansion of the beam stop 5, which is technically required, can therefore cause a gap in the superimposition of the light images of the two modules 2 and 3, which can also be compensated for by using the said projections.
  • the optical axis z of the common projection lens 4 is oriented essentially horizontally, and the high-beam module 3 is offset downwards in relation to the beam stop 5 and the low-beam module 2 is offset upwards in relation to the beam stop 5 (along the axis y) is offset.
  • the low-beam module 2 and the high-beam module 3 can each have a main emission direction, with the two modules 2 and 3 each being inclined in relation to the optical axis z of the common projection lens 4 in such a way that their main emission directions in relation to the optical axis z of the common projection lens 4 are the same Include angle, whereby said light beams L 1 'and L 2 "are oriented parallel to each other.
  • the first deflection section 4a is in the Figures 1 and 2 arranged in a central area of the common projection lens 4 .
  • the central area starting from the point of intersection of the optical axis z Projection lens 4 with the exit surface 4' extends upwards and downwards for a length of 25% of the circumference of the exit surface 4' in a sectional view along the optical axis z.
  • figure 4 shows a distribution of projections along the vertical extension (curved about a vertical axis y) of the lens 4.
  • the first section 4a comprises two subsections 4a' and 4a", with a first subsection 4a' above the optical axis z of the common projection lens 4 and a second sub-section 4a" is located below the optical axis z of the common projection lens 4, the asymmetry of the projections present in the second sub-section 4a" being more pronounced than the asymmetry of the projections present in the first sub-section 4a'.
  • Each subsection 4a' and 4a'' has projections of the first type 6a, 6b, 6e, 6f. In general, all of the projections can extend parallel to the optical axis z.
  • the asymmetry of the projections 6a, 6b, 6e, 6f of the first type is formed in that the second flank 6a", 6b", 6e", 6f" of the respective projection is flatter than its first 6a', 6b ', 6e', 6f' edge.
  • adjacent projections adjoin one another in the vertical direction along the circumference of the exit side 4 ′ of the common projection lens 4 .
  • the projections of the first type can be divided into a first subtype 6a, 6e and a second subtype 6b, 6f.
  • the projections of the two subtypes differ from one another at least in the geometric shape of the second flanks, in that the second flanks 6b" and 6f" of the second subtype are flatter on average than the second flanks 6a" and 6e" of the first subtype.
  • the protrusions of different subspecies may be alternately juxtaposed in that each protrusion enclosed by adjacent protrusions is of a different subspecies than its adjacent protrusions. In 7 it can be seen that the flank 6a' of the structure or of the projection 6a is very steep (strong downward blurring).
  • a second and a third deflection section 4b and 4c are provided on the common projection lens 4, which are each arranged in an edge region of the common projection lens 4.
  • the edge areas can be designed differently or also in the same way.
  • the projections 6c and 6d in the second and third deflection sections 4b and 4c are designed as projections of a second type, ie as symmetrical projections. This means that the totality of the projections comprises at least projections 6c and 6d of a second type, in which the falling and rising flanks are formed essentially symmetrically to one another. According to 3 the structure formed by the projections can thus consist of four parts.
  • the top and bottom structures can be symmetrical to each other and can blur the vertical (steep flanks). This leads to a strong softening in the edge areas of the HD line (where legal requirements are not yet relevant) and to a slight softening of the gradient. In particular, it can be beneficial if there is a slight softening of the gradient in an area of the light image in which this can be of particular use due to legal requirements, namely, for example, according to ECE in the amount of -2.5° horizontally in an angular range of -1 up to 1° vertical.
  • figure 9 shows a detailed illustration of exemplary horizontally distributed projections, with at least individual projections 6g, 6h also having asymmetrically inclined flanks 6g", 6h" in relation to a horizontal extension along the common projection lens 4.
  • These projections 6g and 6h are juxtaposed along the periphery of the exit side 4' of the common projection lens 4 as seen in the horizontal direction. They can be arranged in a horizontal central area or also in an edge area.
  • All of the protrusions can, for example, have a maximum height of 5 microns and a maximum width of 1 mm.
  • the ratio of the width of the projections 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h to the height of the projections 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h is in the range between 10 and 1000, in particular between 50 and 200.
  • figure 5 a detailed view of the top area (edge area) of the lens according to FIG 4 distributed protrusions

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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)
EP20209407.4A 2020-11-24 2020-11-24 Phares de véhicule Withdrawn EP4001742A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20209407.4A EP4001742A1 (fr) 2020-11-24 2020-11-24 Phares de véhicule
PCT/EP2021/080659 WO2022111971A1 (fr) 2020-11-24 2021-11-04 Phare de véhicule
CN202180079012.6A CN116670427A (zh) 2020-11-24 2021-11-04 车辆前照灯
EP21802735.7A EP4251915A1 (fr) 2020-11-24 2021-11-04 Phare de véhicule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20209407.4A EP4001742A1 (fr) 2020-11-24 2020-11-24 Phares de véhicule

Publications (1)

Publication Number Publication Date
EP4001742A1 true EP4001742A1 (fr) 2022-05-25

Family

ID=73554275

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20209407.4A Withdrawn EP4001742A1 (fr) 2020-11-24 2020-11-24 Phares de véhicule
EP21802735.7A Pending EP4251915A1 (fr) 2020-11-24 2021-11-04 Phare de véhicule

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP21802735.7A Pending EP4251915A1 (fr) 2020-11-24 2021-11-04 Phare de véhicule

Country Status (3)

Country Link
EP (2) EP4001742A1 (fr)
CN (1) CN116670427A (fr)
WO (1) WO2022111971A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008023551A1 (de) * 2008-05-14 2009-11-19 Automotive Lighting Reutlingen Gmbh Optische Linse für Beleuchtungszwecke und Beleuchtungseinrichtung mit einer solchen Linse
DE102008036192A1 (de) * 2008-08-02 2010-02-04 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugbeleuchtungseinrichtung
DE102009020593A1 (de) * 2009-05-09 2010-11-11 Automotive Lighting Reutlingen Gmbh Zur Erzeugung einer definierten Overhead-Beleuchtung eingerichteter Fahrzeugscheinwerfer
WO2013104785A1 (fr) * 2012-01-12 2013-07-18 Valeo Vision Lentille pour module optique de véhicule automobile
DE102013002965A1 (de) * 2013-02-22 2014-08-28 Docter Optics Se Scheinwerferlinse für einen Fahrzeugscheinwerfer
CN203927727U (zh) * 2014-05-20 2014-11-05 丹阳市宝石照明系统有限公司 利用表面微小矩形特征阵列来改变光路的投影灯透镜
WO2015031924A1 (fr) * 2013-09-03 2015-03-12 Zizala Lichtsysteme Gmbh Structure optique pour un dispositif d'éclairage pour un phare de véhicule automobile
CN211260666U (zh) * 2019-09-23 2020-08-14 深圳市百康光电有限公司 一种透镜和灯具

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008023551A1 (de) * 2008-05-14 2009-11-19 Automotive Lighting Reutlingen Gmbh Optische Linse für Beleuchtungszwecke und Beleuchtungseinrichtung mit einer solchen Linse
DE102008036192A1 (de) * 2008-08-02 2010-02-04 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugbeleuchtungseinrichtung
DE102009020593A1 (de) * 2009-05-09 2010-11-11 Automotive Lighting Reutlingen Gmbh Zur Erzeugung einer definierten Overhead-Beleuchtung eingerichteter Fahrzeugscheinwerfer
WO2013104785A1 (fr) * 2012-01-12 2013-07-18 Valeo Vision Lentille pour module optique de véhicule automobile
DE102013002965A1 (de) * 2013-02-22 2014-08-28 Docter Optics Se Scheinwerferlinse für einen Fahrzeugscheinwerfer
WO2015031924A1 (fr) * 2013-09-03 2015-03-12 Zizala Lichtsysteme Gmbh Structure optique pour un dispositif d'éclairage pour un phare de véhicule automobile
CN203927727U (zh) * 2014-05-20 2014-11-05 丹阳市宝石照明系统有限公司 利用表面微小矩形特征阵列来改变光路的投影灯透镜
CN211260666U (zh) * 2019-09-23 2020-08-14 深圳市百康光电有限公司 一种透镜和灯具

Also Published As

Publication number Publication date
EP4251915A1 (fr) 2023-10-04
WO2022111971A1 (fr) 2022-06-02
CN116670427A (zh) 2023-08-29

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