• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Lighting unit for a headlight, in particular a motor vehicle headlight, a pointing at least two light sources (la, 1b), at least one reflector (2a, 2b) which limits z light chambers (3a, 3b), a diaphragm (4) and a projection lens (5) with an optical axis (A), wherein a light chamber (3a) is arranged on an upper side and a Lichtka mer (3b) on an underside of the diaphragm (4), wherein within the Lichtka numbers (3a, 3b) in each case at least one light source ( la, 1b) is arranged, and the Bl de (4) for generating a sharp light-dark boundary in a light image generated by the light substantially to a focal plane (E) of the projection lens extends, wherein the diaphragm (4) at least one A light path (8a, 8b, 8c, 8d) from a light chamber (3a, 3b) through the at least one light window (7a, 7b) and through the projection lens (5) to the outside.
    公开号:AT514161A1
    申请号:T50242/2013
    申请日:2013-04-09
    公开日:2014-10-15
    发明作者:Dietmar Kieslinger；Johann Altmann
    申请人:Zizala Lichtsysteme Gmbh；
    IPC主号:
    专利说明:

    P12926
    Light unit with aperture with at least one light window
    The invention relates to a lighting unit for a headlight, in particular a motor vehicle headlight comprising at least two light sources, at least one reflector defining at least two light chambers, a diaphragm and a projection lens having an optical axis, wherein a light chamber at an upper side and a light chamber at a lower side the aperture is arranged, wherein in each case at least one light source is arranged within the light chambers, and the aperture for generating a sharp light-dark boundary extends in a light image generated by the light unit substantially up to a focal plane of the projection lens.
    Such 1-light units are common in the automotive industry, wherein the uppermost light chamber (also referred to as "upper light chamber") often performs a low beam function and the lower light chamber (also referred to as "lower light chamber") High beam function comes to. The two light chambers are separated from each other by a diaphragm, which is for example set up to ensure a sharp 1 lell-dark boundary in a light image generated by the low beam function, so that glare from vehicles ahead and by oncoming vehicles is largely avoided.
    Thus, for example, document EP 1 912 018 A1 shows a lUse unit, with two reflectors each forming a light chamber, into which light chamber a respective light source radiates, the incident light being directed by the reflector onto a projection lens.
    Furthermore, the document DE 10 2008 015 510 B4 shows a leuing unit in which a reflector reflects light from a light source so that the light is collected on or near an optical axis of a projection lens.
    From the document DE 60 2004 002 043 T2 a Leuehteinheit is known, in which two ellipsoidal reflectors, each of which surrounds a reflection space for light rays and each having a substantially elliptical reflection surface, two light sources, each in the vicinity of a first focus of a each reflector are arranged, and a projection lens whose focal plane is near a second 2/17 -2 PI 2926
    Focusing of the first reflector is arranged, wherein the first reflector also has a flat horizontal reflecting surface whose top is reflective. The second reflector is disposed below the first reflector, the second reflector having an inclination with respect to the first reflector and configured to direct light to or near the second focal point as well, wherein the planar horizontal reflecting surface of the first reflector is at the top a translucent part is mounted, wherein the underside of the translucent part can be penetrated by light beams of the second reflector, so that the light beams can get into the second focal point, the object of this lighting unit is, the property of serving as a light source encapsulated diodes, generally in a Ra Half of the light emitted by the diode can be detected more efficiently to a large extent.
    The light units known from the prior art have the disadvantage in common that they do not allow any intentional mixing or overlapping of the light beams of a first upper-side mounted and a second lower-side mounted light chamber. A targeted influencing of the Hel 1-Du nkelgrenze are therefore in known from the prior art constructions irt Considering usual production engineering and economic requirements set narrow limits.
    It is therefore an object of the invention to provide a lighting unit for a headlight, in particular a motor vehicle headlight, which allows targeted mixing of the light beams of a first upper side mounted and a second lower side mounted light chamber. By blending the light beams is meant an overlap of the illuminated area in the photograph.
    This object is achieved with a lighting unit of the type mentioned, in which according to the invention the aperture at least one light window äufweist, wherein at least one light path from a light chamber through the at least one light window and through the projection lens extends to the outside. Thanks to the invention, it is possible to purposefully mix light beams of two light chambers. On the one hand, a sharp bright-dark boundary, as required, for example, in the light image of a Abblehdlichtfunktion can be realized and at the same time inhomogeneities (especially a shady band in the range of the bright-dark border) in the photograph of Eernliehtfunktion be particularly simple, economical and efficient minimized. In addition, a targeted 3/17 -3- PI 2926
    Radiation of light rays in areas of the light image possible, which are usually for the illumination of traffic signs of particular importance (so-called "sign light"). The inventive features of the lighting unit also allow a particularly favorable and robust design. The aperture is not movable but rigid.
    In an advantageous embodiment of the invention, it is provided that the diaphragm has at least partially a reflective surface. As a result, the efficiency of the headlight system can be additionally increased by additionally introducing light reflected at the diaphragm, which is otherwise absorbed at the diaphragm, into the projection lens and thus into a light image generated by the lighting unit or the headlight,
    In order to allow a particularly targeted influencing by the individual light chambers on the light image generated by the light unit, it may be provided in a favorable embodiment of the invention that the at least one light path through the at least one light window exclusively from the located on the underside of the aperture light chamber passing through the at least one 1 -ichtfenster through the projection lens to the outside. Thus, for example, in an operating mode in which both light chambers (or the light chambers associated with light chambers) are active (high beam function), lying in the light-dark boundary shaded band can be avoided by light beams of the lower light chamber targeted in the range of Hell -Dark border are steered. In an operating mode in which only the upper light chamber is active (low-beam function), a sharp bright-dark boundary is maintained, whereby legal requirements with respect to the light image of the lighting unit can be met in a particularly simple manner. In a first particularly simple variant of the invention, it is provided that the diaphragm has at least a first and a second diaphragm section delimiting the at least one light window, the at least one light window being formed as a recess in the diaphragm. The panel sections may be formed like a lamella. In general, the aperture including the aperture sections can be made thin and flat. 4/17 - 4 PI 2926
    In an alternative variant of the invention, it is provided that the diaphragm has at least a first and a second diaphragm section delimiting the at least one light window, wherein the at least one lens window consists of a light-permeable, dimensionally stable material. The aperture can thus be made very stable in one piece.
    In order to further improve the efficiency of the lighting unit and the targeted influencing of the light image, the invention provides / at least two aperture sections delimiting the at least one light window, wherein at least one aperture section has a reflecting surface through which at least one light path in the direction of the optical! Axis of the projection lens is deflectable.
    The mixing of the light beams of the two light chambers can be further increased by the aperture has two light windows, each light window to a light path is ordered, the light paths through the light window and through the projection lens to the outside. In general, a plurality of light windows can be provided, each of which is delimited by aperture sections. The number of light windows can generally be adapted to the requirements of the light image.
    Thus, it is provided in a favorable development of the invention that the diaphragm has a first, a second and a third diaphragm portion, wherein the second diaphragm portion is formed lamellar and a first light window for a first light path between the first and the second diaphragm portion is formed and a second window for a second light path between the second and the third diaphragm portion is formed, wherein the light chambers are arranged on the upper and lower sides of the first diaphragm portion. The first diaphragm section preferably has a greater spatial extent than the other diaphragm sections and is farther away from the focal plane than the second and third diaphragm sections. In an advantageous variant of the invention, the second diaphragm section is set up to deflect the second light path in the direction of the optical axis of the projection lens. For this purpose, the second diaphragm portion, which is formed like a lamella, be rotated about its longitudinal axis, so that a targeted deflection of the second light path is possible in a simple manner. 5/17 -5- PI2926
    The invention further relates to a headlight with at least one lighting unit according to one of the preceding claims. Further developments of this headlight correspond to those of the lighting unit, as discussed here.
    The invention together with further advantages is explained in more detail below with reference to a number of exemplary, non-limiting embodiments, which are illustrated in the figures. This shows
    1 is a perspective view of a section of a lighting unit according to the prior art,
    2 shows a detail of the light images which can be generated with the aid of the lighting unit according to FIG. 1,
    3 is a schematic Schnittdärstellung the 1 .euchteinheit of FIG. 1,
    Fig. 4 is a schematic sectional view of a first embodiment of the invention and
    Fig. 5 is a schematic sectional view of a second embodiment of the invention.
    In Fig. 1, a section of a known from the prior art light unit is shown. Therein, two light sources la can be seen, which are each surrounded by a reflector 2a. The reflectors 2a reflect light emitted by the light sources 1a, inter alia in the direction of a downstream aperture 4, which serve to produce a sharp light-dark boundary. An associated projection lens 5 is shown in FIG.
    FIG. 2 shows a section of the light images that can be generated with the aid of the lighting unit according to FIG. 1. Therein, two regions separated by a shadowed band 6b, namely a lower region 6a and an upper region 6c, can be seen, the lower region 6a representing that region of the light image which is also illuminated in the case of a dimming function of the lighting unit. The upper portion 6c remains unlit during the duration of the dimming function, with the band 6b extending along a Hel1-dark boundary consisting of two horizontal portions connected by an oblique portion. The course of this limit is generally required by law. 6/17 -6- PI 2926
    The upper area 6c is always illuminated when a high-beam function of the first lighting unit is in operation. In this case, not shown in Fig. 1 light sources are activated, which are mounted generally below the light sources la and emit their reflectors light at least partially in the direction of the aperture 4 in the upper portion 6c. The high-beam function draws thereby thereby for example by switching on further light sources, which radiate in the upper area 6c. These additional light sources generally can not be used to emit light into the lower region 6a, as this is generally prevented by the geometry of the aperture 4. Namely, the diaphragm 4 reaches down to a focal plane E of the projection lens 5 seen in Fig. 3, whereby a sharp bright-dark boundary between the upper and lower portions 6a and 6c should be ensured, and always when the Ablendlicht function When operating the high-beam function of the lighting unit, however, a visible bright-dark boundary between the lower and the upper area 6a and 6c is undesirable, since the most uniform possible illumination of the extended compared to the Ableüdlichtfunktion 1. Due to the unavoidable spatial extent (more precisely, the thickness) of the diaphragm 4 and due to shading effects in the light image of the high beam function in the transition between the lower and upper area 6a and 6c always a shady area, namely the band 6b, to lie, which is less strong is illuminated and therefore appears in the photograph as a dark stripe. When using such a lighting unit in a motor vehicle headlight, the driver is made difficult to recognize the environment, which increases the risk of accidents.
    FIG. 3 shows a schematic sectional view of the lighting unit according to FIG. 1. The panel 4 is embodied integrally therein and, as mentioned, extends as far as the focal plane E of the downstream projection lens 5. At a top and a bottom of the panel 4 each have a light source la or 1b is mounted. The light sources 1a and 1b are each surrounded by a reflector 2a and 2b which reflectors 2a and 2b are adapted to direct the light sources 1a and 1b emitted to the downstream projection lens 5, the projection lens 3 light beams on a front of the lighting unit projected area. The projection lens 5 in this case has an optical axis A, which is oriented substantially normal to the focal plane E. This structure is known from the prior art and has the disadvantages of the prior art already described above
    Technology on. 7/17 -7- PI 2926
    In Fig. 4 is a schematic sectional view of a first embodiment of the invention is shown. According to the invention, a diaphragm is divided into at least two diaphragm sections; In the embodiment shown, it consists of a first, a second and a third diaphragm section 4a, 4b and 4c, the third diaphragm section 4c reaching the focal plane E of a downstream projection lens 5. The aperture 4 generally has a reflective surface. It is understood that the aperture 4 is generally opaque. In each case a light source la or lb is mounted on an upper side and an underside of the first diaphragm section 4a, wherein the diaphragm section 4a additionally serves as a heat sink for the light sources 1a and 1b. The light sources 1a and 1b are each surrounded by a reflector 2a and 2b, which reflectors 2a and 2b are adapted to direct light emitted by the light sources 1a and 1b to a downstream projection lens 5, the projection lens 5 light beams on a front of the lighting unit projected area outwards. The light sources 1a or 1b are preferably located at a focal point of the respective reflector 2a or 2h, the reflector 2a defining an upper light chamber 3a and the second reflector 2b defining a lower light chamber 3b. The projection lens 5 has an optical axis A, which is oriented substantially normal to the focal plane E. The three diaphragm sections 4a, 4b and 4c are separated by light windows 7a and 7b forming recesses, wherein the diaphragm sections 4a, 4b and 4c together with the recesses form a fictitious wedge, the side surfaces of this wedge with aligned side surfaces of the diaphragm sections 4a, 4b and 4c fall together. As an alternative to the recesses, the diaphragm sections 4a, 4b and 4c could be distanced from one another by a light-permeable, dimensionally stable material. The diaphragm sections 4a, 4b and 4c are arranged substantially parallel to one another, with respect to the focal plane E one after the other, preferably extend normal to the sectional plane according to FIG. 4 and allow the passage of light rays through the light windows 7a and 7b into the projection lens 5 along Light paths 8a, 8b, which are exemplified. The passage takes place in the embodiment shown only by the lower light chamber 3b through the light windows 7a and 7b. The diaphragm portions 4a, 4b and 4c are aligned so that light from the upper light chamber 3a can not pass through the optical windows 7a and 7b. This is illustrated by way of example with reference to a light path 8e, which is delimited by the diaphragm section 4b. It is thus achieved that light from the lower light chamber 3b, which is switched on in the case of a high-beam function of the 1st light unit, can be directed into that region which is made of bands known from the prior art and described in the opening paragraph 8,117-PI2926 6b corresponds. Thus, the bright-dark boundary or the shaded in the prior art band 6b illuminated and a homogeneous light image can be achieved. A low-beam function, for which only the upper light chamber 3a is activated in the illustrated embodiment, is not negatively influenced by the diaphragm sections 4a, 4b, 4c, since they are designed so that no light rays of the upper light chamber 3a through the light windows 7a or 7b can pass through. The light paths 8c and 8d lead along or above the diaphragm 4 into the projection lens 5.
    Fig. 5 shows a second embodiment of the invention, which represents a development of the first embodiment. Unless otherwise described, the features with the same reference numerals correspond to those of the first embodiment, and what has already been said under FIG. 4 applies. The second embodiment differs from the first embodiment by the orientation of the second diaphragm portion 4b. This is not as previously aligned b / w. arranged in parallel, but rotated counterclockwise along its longitudinal axis. The rotation can be, for example, between 0 ° and 43 °, in particular 5 °, 10 °, 13 ° or 20 °. In particular, the second diaphragm section 4b has a reflecting surface, by means of which the light paths 8a and 8b can be deflected. Thus, light rays from the lower light chamber 3b pass along the light paths 8a and 8b into areas of the light image of the light unit which would not have been accessible without the deflection by the second aperture section 4b. Due to the deflection of light paths according to the invention, inhomogeneities in the light image of a lighting unit can be specifically compensated.
    The embodiments of the invention shown in FIGS. 4 and 5 show diaphragms 4 with three diaphragm sections 4a, 4b and 4c, which include two light windows 7a and 7b. Of course, the number of diaphragm sections as well as the light window can deviate arbitrarily from the number of the embodiment shown. Also, several aperture sections may be lamellar and / or twisted. What is essential is the idea on which the invention is based, which can be modified by a person skilled in the art in manifold ways and still be maintained as such. 9.17
    权利要求:
    Claims (10)
    [1]
    Claims 1, lighting unit for a headlamp, in particular a motor vehicle headlamp, comprising - at least two light sources (la, lb), - at least one reflector (2a, 2b) which limits two light chambers (3a, 3b), - a diaphragm (4) and - a projection lens (5) having an optical axis (A), wherein a light chamber (3a) is arranged on an upper side and a light chamber (3b) on a lower side of the diaphragm (4), wherein inside the light chambers (3a 3b) in each case at least one light source (1a, 1b) is arranged, and the diaphragm (4) for generating a sharp light-dark boundary in a light image generated by the light unit substantially up to a focal plane (E) of the projection lens (5) extends, characterized in that the diaphragm (4) at least one light window (7a, 7b), wherein at least one light path (8a, 8b, 8c, 8d) from a light chamber (3a, 3b) through the at least one light window (7a, Tb) and through the projection lens (5) extends to the outside.
    [2]
    2, lighting unit according to claim 1, characterized in that the diaphragm (4) has at least partially a reflective surface.
    [3]
    3, lighting unit according to claim 1 or 2, characterized in that the at least one light path (8a, 8b, 8c, 8d) through the at least one light window (7a, 7b) exclusively of the at the bottom of the diaphragm (4) located light chamber ( 3a, 3b) extends through the at least one light window (7a, 7b) through the projection lens (5) to the outside.
    [4]
    4, light unit according to one of claims 1 to 3, characterized in that the diaphragm (4) at least a first and a second at least one light window (7a, 7b) delimiting diaphragm portion (4a, 4b, 4c), wherein the at least one Light window (7a, Tb) is formed as a recess in the diaphragm (4).
    [5]
    5, lighting unit according to one of claims 1 to 3, characterized in that the diaphragm (4) at least a first and a second the at least one Lichtfens- 10/29 - 10 - 2926 ter (7a, 7b) limiting diaphragm section (4a, 4b, 4c), wherein the at least one light window (7a, Tb) consists of a translucent dimensionally stable material.
    [6]
    6. Lighting unit according to one of claims 1 to 5, characterized in that the diaphragm (4) at least two the at least one light window (7a, 7b) delimiting diaphragm sections (4a, 4b, 4c), wherein at least one diaphragm section (4a, 4b , 4c) has a reflective surface, through which at least one light path (8a, 8b, 8c, 8d) can be deflected in the direction of the optical axis (A) of the projection lens (5),
    [7]
    7. Leüchteinheit according to one of claims 1 to 6, characterized in that the diaphragm (4) has two light windows (7a, 7b), wherein each light window (7a, 7b) is associated with a light path (8a, 8b, 8c, 8d) wherein the light paths (8a, 8b, 8c, 8d) extend through the light window (7a, 7b) and through the projection lens (5) to the outside.
    [8]
    8. Leüchteinheit according to one of claims 1 to 7, characterized in that the diaphragm (4) has a first, a second and a third diaphragm portion (4a, 4b, 4c), wherein the second diaphragm portion (4b) is formed like a lamellar and a first light window (7a) for a first light path (8a) between the first and the second diaphragm section (4a, 4b) is formed and a second 1 .ichtfenster (7b) for a second light path (8b) between the second and the third diaphragm section ( 4b, 4c) is formed, wherein the light chambers (3a, 3b) are arranged on the upper and lower sides of the first diaphragm section (4a).
    [9]
    9. Leüchteinheit according to claim 8, characterized in that the second diaphragm section (4b) is adapted to deflect the second light path (8b) in the direction of the optical axis (Λ) of the projection lens (5).
    [10]
    10. Motor vehicle with at least one lighting unit for a headlamp according to one of the preceding claims. 11/17
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    同族专利:
    公开号 | 公开日
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    JP2016514889A|2016-05-23|
    CN105121943A|2015-12-02|
    WO2014165884A3|2014-12-04|
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    US10101000B2|2018-10-16|
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    引用文献:
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    JP4579154B2|2005-12-28|2010-11-10|株式会社小糸製作所|Vehicle headlamp|
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    DE102009008631B4|2009-02-12|2016-11-03|Automotive Lighting Reutlingen Gmbh|Projection module for a motor vehicle headlight|
    FR2944578B1|2009-04-21|2013-08-02|Valeo Vision Sas|MODULE AND LIGHTING DEVICE FOR VEHICLE WITH ENHANCED ROAD FUNCTION|
    JP5535663B2|2010-01-14|2014-07-02|株式会社小糸製作所|Vehicle headlamp|
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    DE102010035767A1|2010-08-20|2012-02-23|Automotive Lighting Reutlingen Gmbh|Projection headlamps with deliberately attenuated light intensity gradients at the cut-off line|
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    DE102017001019A1|2017-02-04|2018-08-09|GM Global Technology Operations LLC |vehicle headlights|
    CN108692270B|2017-02-20|2020-05-12|诚益光电科技股份有限公司|Vehicle lamp device|
    JP2019012623A|2017-06-30|2019-01-24|株式会社小糸製作所|Vehicular lighting fixture|
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    法律状态:
    2016-11-15| HC| Change of the firm name or firm address|Owner name: ZKW GROUP GMBH, AT Effective date: 20161014 |
    2018-12-15| MM01| Lapse because of not paying annual fees|Effective date: 20180409 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50242/2013A|AT514161B1|2013-04-09|2013-04-09|Light unit with aperture with at least one light window|ATA50242/2013A| AT514161B1|2013-04-09|2013-04-09|Light unit with aperture with at least one light window|
    CN201480020359.3A| CN105121943A|2013-04-09|2014-04-07|Lamp unit comprising a shield having at least one light window|
    PCT/AT2014/050081| WO2014165884A2|2013-04-09|2014-04-07|Lamp unit comprising a shield having at least one light window|
    EP14723675.6A| EP2984396B1|2013-04-09|2014-04-07|Lamp unit comprising a shield having at least one light window|
    US14/776,950| US10101000B2|2013-04-09|2014-04-07|Lamp unit comprising a shield having at least one light window|
    JP2016505651A| JP6161786B2|2013-04-09|2014-04-07|Lamp unit having a shade with at least one light window|
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