• 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:
    In a lighting unit (1) for a headlamp, in particular a Fahrzeugscheinwer¬fer, consisting of a plurality of light sources (2) and a light guide unit (3) with a plurality of light guides (6), one light guide (6) depending on a light source (2) and the light guide unit (3) consists of at least two interconnectable parts (4, 5), wherein a light source side part (4) of the light guide unit (3) in the emission direction of the light guide unit (3) between the light sources (2) and a emitting part (5) of the light guide unit (3) is arranged.
    公开号:AT513206A1
    申请号:T50284/2012
    申请日:2012-07-18
    公开日:2014-02-15
    发明作者:Andreas Hoelzl；Markus Datzreiter；Irmgard Krenn；Gerhard Honauer
    申请人:Zizala Lichtsysteme Gmbh；
    IPC主号:
    专利说明:

    Lighting unit for a headlight
    The invention relates to a lighting unit for a headlight, in particular a vehicle headlight, consisting of a plurality of light sources and a light guide unit with a plurality of light guides.
    Such lighting units are commonly used in the automotive industry and serve to image glare-free high beam by the light, which is usually emitted by a plurality of artificial light sources, is bundled by a corresponding plurality of juxtaposed light guides in the emission direction. The light guides have a relatively small cross-section and therefore emit the light of the individual light sources each associated with very concentrated in the emission direction. In AT 510 437 A4 a light module is disclosed in this context, which has a light guide in the form of a light guide, there called a light tunnel, and a plurality of light sources.
    In the context of the invention, preferred light sources are in particular light-emitting diodes (LEDs), which are characterized by a high light output with a very small size. Conventional LEDs for said application have edge lengths in the range of one millimeter and less and are stored in a matrix, i. arranged in groups on a common board immediately next to each other, wherein the outer shape of this matrix or groups corresponds to the light image to be projected. Due to the fact that the light guides in the light guide unit are likewise arranged directly adjacent to one another in order to produce a homogeneous light image for a given size of the individual light sources, the walls between the individual light guides designed as reflectors are inevitably very thin. This leads to an increased effort in the production of the light guide units, which are usually produced by injection molding. Furthermore, with thin walls between the light guides, the heat input of the light sources used is a problem, especially when the deformation temperature of the thermoplastic used is reached in Spritzgußtei-len, or the material used otherwise takes thermal damage. Another disadvantage of such light guide units is that at the small cross sections of the 2/22 -2- P12708
    Light guides the uniform coating of the reflector surfaces no longer reliable, since the aluminum vapor used for applying the layer can not be distributed in the entire depth of the light guides during vapor deposition.
    It is therefore an object of the present invention to improve a lighting unit of the type mentioned in such a way that the mentioned disadvantages are avoided.
    This object is achieved in that each light guide is assigned to each one light source and the light guide unit consists of at least two interconnectable parts and a lichtquellenseitiger part of the light guide unit is arranged in the emission of the light guide unit between the light sources and an emission-side part of the light guide unit. In the case of the luminous unit according to the invention, the light guide unit thus consists of at least two parts which are arranged so that the light guide unit is split at least transversely to the light emission direction of the light guide unit. The light guides are thus also divided into two parts in length, so that during production shorter sections of the light guides can be cast. In other words, this means that the respective light guides are arranged both in the light source side part of the light guide unit and in the emission side part of the light guide unit. This reduces the risk of mis-casting and allows the use of materials for the different parts of the light guide unit, which are optimized according to their flow characteristics or can be chosen in terms of their heat resistance.
    This allows for a given geometry of the light guides increased heat resistance of the light sources facing parts of the light guide unit at a relatively low production cost. In this connection, according to a preferred embodiment of the present invention, it is provided that the light-source-side part of the light guide unit directly adjoins the light sources. This leads to a more or less complete radiation of the light of the light sources in the light guides, whereby an optimized light output is achieved.
    It is preferably provided that the light source-side part of the light guide unit is made of a more heat-resistant material than the radiation-side part of the light guide unit. The heat-resistant material may in this case be a particularly heat-resistant plastic 3/22 -3 P12708, which also thermosets can be processed. Moreover, it is also conceivable to manufacture the light source-side part of the light guide unit made of ceramic, metal or mineral glass.
    However, the high flexibility with regard to the choice of materials can also be claimed for the emission-side part of the light guide unit. According to a preferred embodiment, it is therefore provided that the emission-side part of the light guide unit is made of a flowable thermoplastic than the light source side Teü the light guide unit. Particularly free-flowing thermoplastics are less resistant to temperature than viscous materials, but the special design of the light guide unit according to the present invention allows the heat of the light sources to be absorbed by the light-source-side part of the light guide unit and dissipated via it, so that there are no critical temperatures on the emission side occur.
    In order to optimize the performance of the light guide unit, it is preferably provided that reflector surfaces of the light guides are reflective coated, in particular coated with aluminum. The coating of reflector surfaces is usually by vapor deposition, wherein the division of the light guide unit according to the invention is also advantageous in terms of a uniform coating of the reflector surfaces over the prior art, since the aluminum vapor easily in the subdivided, and thus relatively short light guides in the light source side part and radiating side part of the light guide unit penetrates.
    In order to scatter as little light at the parting surfaces of the parts of the light guide unit, which is inventively traversed by the light guides, which would reduce the light output of the light unit, it is provided according to a preferred embodiment of the present invention that the light source side Teü the light guide unit and the Radiating side part of the light guide unit fixing means for fixing the two parts of the light guide unit in their relative position transversely to the emission direction. In this way, it is already possible to ensure that the parts of the light guide unit can be reliably assembled in such a way that the reflector surfaces are in alignment with one another during the construction and casting or during the other production of the parts of the light guide unit. 22 -4- P12708 have as few edges or steps as possible, where the light from the light sources is scattered or blocked. According to a preferred embodiment of the present invention, the light-source-side part of the light-guiding unit has reference studs and the emission-side part of the light-guiding unit has reference bores associated therewith. The referencing pins and the corresponding reference bores additionally ensure aligned alignment of the two parts of the light guide unit relative to each other. For the purposes of the present invention, kinematic reversals of this principle should also be covered by this formulation.
    In order to be able to optimally use the advantages already described with regard to injection molding and with regard to the coating of the light guides for both parts of the light guide unit, the invention is preferably further developed such that the light source side part of the light guide unit and the emission side part of the light guide unit on curved and mutually corresponding Surfaces are fixed in their relative position to each other. The light guides in the light guide unit have different depths, so that the light outcoupling surfaces of the individual light guides are arranged in a curved plane, as will be explained in more detail below. The depth differences can be shared in this preferred embodiment of the invention on the two parts of the light guide unit, so that in each case the smallest possible depths must be poured and coated.
    According to an alternative of the invention, the emission-side part of the light guide unit has a plurality of light guides. For the purposes of the present invention, a light guide means a structure in which incident light is reflected on the walls by total reflection and in which diffraction of the light to the perpendicular of the light guide occurs. In the present case, the light guide is used to collect the light from the light guides and to radiate in the direction of a possibly downstream optical system, for example in the form of a lens. Here, the division of the light guide unit according to the invention proves to be advantageous if the material of the light guide is sensitive to heat. In this context, it is preferable that the optical fibers are made of a transparent plastic. It can thus be dispensed with the use of expensive glass, since the heat input into the light guide in the lighting unit according to the invention can be kept correspondingly low. 5/22 -5- P12708
    Alternatively or additionally, however, it may also be provided according to the invention that the light-source-side part of the light-guiding unit has a plurality of light guides. This is easily realizable with the present invention, depending on the optical task position, as long as the heat input of the light sources in the light source side part of the light guide unit is not too large.
    It can preferably be provided that one light guide on the emission side part of the light guide unit is assigned to a respective light guide, in particular a reflector on the light source side part of the light guide unit, whereby the light from each of the light guides can be forwarded optimized. For manufacturing reasons, it may be necessary in this case to combine the light guides associated light guides radiating side to a common radiating side face plate. The light output surfaces of the individual light guides are in this case on the emission side surface of the emission side face plate. The emission side surface of the face plate is curved and follows the field curvature of the downstream lens, so that all light output surfaces of the individual light guides can be projected by the lens sharp on the road.
    It is preferably provided that a light source-side surface of the light-source-side part of the light guide unit is coated with aluminum and not coated in a reflective manner. In this way, unwanted reflections that can lead to stray light prevented.
    Optionally, it is provided in the present invention that the light guide unit is fixed by means of a holder to a light source box.
    The invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. In this show
    1 shows a perspective sectional view of a lighting unit according to the invention along the line I-I of Figure 2,
    FIG. 2 shows a frontal view of a lighting unit according to the invention,
    Figure 3 is an exploded view of a light unit according to the invention from the light source side, 6/22 -6 PI2708
    FIG. 4 shows an exploded view of a lighting unit according to the invention in its mounting position on a light source box from the emission side,
    5 shows a perspective view of a further embodiment of the lighting unit according to the invention, partly in section,
    6 shows a vertical section through the lighting unit according to the invention along the line VI-VI of Figure 2,
    Figure 7 is a sectional view of a light guide in the sense of a variant of the present invention, and
    Figure 8 is a schematic side view of the lighting unit according to the invention and a lens associated with this light unit.
    In Figure 1, a lighting unit according to the invention is denoted by 1. The light unit 1 consists essentially of a plurality of light sources 2 and a light guide unit 3. The light guide unit 3 is constructed in accordance with the invention such that a light source side part 4 of the light guide unit 3 is arranged between the light sources 2 and an emission side part 5 of the light guide unit 3. It is essential here according to the invention only that a separate part 4 of the light guide unit 3 is provided, so that in addition to the defined parts 4 and 5 also further parts can be provided, which together form the light guide. The light guides 6 are each associated with a light source 2, wherein the light guides 6 extend both in the light source side part 4 of the light guide unit 3 and in the emission side part 5 of the light guide unit 3 and are formed by these. The light sources 2 may each have one or more LED chips. In the illustration, only some of the light sources are shown, but it is obvious that each light guide 6 is assigned to each one light source 2. The light guides 6 in the example according to FIG. 1 have aluminum-coated reflector surfaces 7. It can also be seen in FIG. 1 that the light sources 2 are arranged directly next to one another, which is why the reflector walls 8 must adjoin one another and are therefore very thin-walled. It is obvious that virtually any type of connection, in particular by latching, screwing or gluing the two parts 4 and 5 of the light guide unit 3 can be effective. Due to the divided structure of the light guide unit 3, a different material can be selected for the light source side part 4 of the light guide unit 3 than for the emission side part 5 of the light guide unit 3. In particular, for the light source side part 4 special heat-resistant plastics are used , or other materials used with high heat resistance, while the radiating side part 5 can be made for the purpose of reliable casting of the thin reflector walls 8 of highly flowable thermoplastics. The two parts 4, 5 of the light guide unit 3 are fixed in FIG. 1 to an optional holder 16 or accommodated therein, which serves to fix the parts to a light source box 17 shown in FIG. Denoted by 19 is a spacer which ensures a suitable distance between the light source side part 4 of the light guide unit 3 and the light sources 2 arranged on the light source box 17. In FIG. 1, it can further be seen that the light source-side part 4 of the light-guiding unit 3 and the emission-side part 5 of the light-guiding unit 3 are fixed in their relative position to one another on curved surfaces which correspond to one another. This curvature follows the field curvature of a lens 15 shown in FIG.
    In FIG. 2, the same parts are designated by the same reference numerals, wherein it can be seen that clear cross sections are formed in the light guide unit 3, which form the light guides 6. To ensure that the two parts 4 and 5 of the light guide unit 3 are aligned and remain stable aligned with each other after a long operation, are Referenzierstifte 10, 10 'is provided, the associated with these, designed as slots reference bores 11, 11' interaction, such this can be seen in particular in the illustration according to FIGS. 3 and 4. The reference hole 11 'is formed in this example as a slot to compensate for thermal deformation of the parts 4 and 5. With a flange 18 is designated, which also serves to establish the light guide unit 3.
    In FIG. 3, spacers 19 can again be seen on the light source-side part 4 of the lighting unit 3. With reference numerals 11 and 11 ', reference bores for receiving the referencing pins 10 and 10' shown in FIG. 4 are designated. Optionally, a holder 16 may be provided which carries the light guide unit 3. FIG. 4 also shows the light source box 17, on the outside of which the light sources 2 are arranged in groups or in a matrix. The light source box 17 contains electronic circuits for controlling the individual light sources 2. The light source box can switch individual light sources 2 off and on and also dim the light sources 2. Figure 4 can be further seen that the emission side of the light guide unit 3 is curved. This curvature follows the field curvature of a lens 15 shown in FIG. 8/22 -8- PI2708
    FIG. 5 shows a variant of the invention in which the emitting-side part 5 of the lighting unit 3 has light guides 12 which, together with the reflectors 13 associated with the light guides 12, form the light guides 6 in the light source side part 4 of the light guide unit 3. The light guides 12 are combined on the emission side to form a common emission side end plate 12 ", which represents a common light output surface of the individual light guides. The light-source-side surface 14 of the light-source-side part 4 of the light guide unit 3 is vapor-deposited with aluminum and non-reflective painted to prevent uncontrolled reflections that may cause stray light. It can also be seen in FIG. 5 that the light guides 6, in this case consisting of reflectors 13 and light guides 12, are arranged in three superposed rows, which can be activated by means of the light source box (17) which activates the light sources 2 , wherein the lighting functions of a headlamp, such as low beam, high beam, daytime running light, etc. are represented by responsive circuit of the rows. For example, all rows are switched on for high beam. By deliberately switching off individual rows, further light distributions can be generated. The lower row is intended for the Femlichtanteil, the middle row for the HD line area and the o-bere row illuminated the apron. The lighting functions are reversed in the light guide unit and also represented inverted in the vertical direction, since a complete reversal of the light image is effected by the downstream lens discussed below.
    FIG. 6 shows a variant of the invention in which reflectors 13 or reflector surfaces 7 extend in both parts 4 and 5 of the light guide unit 3. The light sources 2 emit light into the composite reflectors 13, which is reflected on the aluminum-coated reflector surfaces 7 and emitted according to the geometry of the cross sections of the reflectors. Furthermore, the spacers 19 are provided on the light source side part 4 of the light guide unit 3, which correspond in their extension in the emission direction substantially the dimensions of the light sources and thus define a free space in which the light sources are arranged. Since the individual light guides 6 have different lengths, and the light guide unit 3 consequently has a curved outer shape on the emission side, the end edges of further light guides 6 lying behind the sectional plane of FIG. 6 can be seen in the region designated by A.
    FIG. 7 shows the interaction of a reflector 13 and a light guide 12 according to FIG. 5 more clearly. It can be seen that a light guide 12 is placed in a form-locking manner on a reflector 13 so that the light source-side end face 12 'of the light guide directly adjoins the area of the coated reflector surfaces 7. The light guide 12 is preferably made of a transparent plastic, which represents an opüsch denser medium than the air surrounding the light guide 12, so that it comes to the lateral boundary surfaces of the light guide 12 for total reflection. The light is also refracted in the optically denser medium to the solder and finally at the emission-side end face 12 '" or light output surface delivered.
    FIG. 8 schematically shows that the lighting unit 1 according to the invention is associated with a lens 15, wherein an optical axis is designated 100 and the lighting unit 1 intersects, for example, at the level of the middle row of light guides 5.
    Vienna, 18 July 2012 10/22 P12708
    LIST OF REFERENCES (not part of the application) 1 light unit 2 light source 3 light guide unit 4 light source side part 5 emitting side part 6 light guides 7 reflector surface 8 reflector walls 9 fixing means 10 Referenziersüft 10 'Referenziersüft 11 reference bore 11' reference bore 12 light guide 12 'light source side face 12 " radiating end plate 12 '" radiating side face 13 reflector 14 light source side surface 15 lens 16 holder 17 light source box 18 flange 19 spacer 100 optical axis A range 11/22
    权利要求:
    Claims (14)
    [1]
    1. Lamp unit (1) for a headlamp, in particular a vehicle headlamp, consisting of a plurality of light sources (2) and a light guide unit (3) with a plurality of light guides (6), characterized in that each a light guide (6) is assigned to a respective light source (2) and the light guide unit (3) consists of at least two interconnectable parts (4, 5) and a light source side part (4) of the light guide unit (3) in the emission direction of the light guide unit (3) between the Light sources (2) and a radiation-side part (5) of the light guide unit (3) is arranged.
    [2]
    2. Light unit according to claim 1, characterized in that the light source side part (4) of the light guide unit (3) directly to the light sources (2) connects.
    [3]
    3. Light unit according to claim 1 or 2, characterized in that the light source side part (4) of the light guide unit (3) made of a more heat-resistant material than the radiating side part (5) of the light guide unit (3) is made.
    [4]
    4. Lighting unit according to one of claims 1 to 3, characterized in that the radiating side part (5) of the light guide unit (3) is made of a flowable thermoplastic than the light source side part (4) of the light guide unit (3).
    [5]
    5. Lighting unit according to one of claims 1 to 4, characterized in that reflector surfaces (7) of the light guides (6) coated reflective, in particular coated with aluminum.
    [6]
    6. Lighting unit according to one of claims 1 to 5, characterized in that the light source side part (4) of the light guide unit (3) and the radiation-side part (5) of the light guide unit (3) fixing means (9) for fixing the two parts (4, 5) of the light guide unit (3) in their relative position transversely to the emission direction.
    [7]
    7. Lighting unit according to one of claims 1 to 6, characterized in that the light source side part (4) of the light guide unit (3) referencing pins (10, 10 ') and the 12/22 -11- P12708 radiation-side part (5) of the light guide unit ( 3) assigned to these reference holes (11,11 ').
    [8]
    8. Lighting unit according to one of claims 1 to 7, characterized in that the light source side part (4) of the light guide unit (3) and the emission-side part (5) of the light guide unit (3) fixed to curved and mutually corresponding surfaces in their relative position to each other are.
    [9]
    9. Light unit according to one of claims 1 to 8, characterized in that the emission-side part (5) of the Lichtführimgseinheit (3) has a plurality of light guides (12).
    [10]
    10. Lighting unit according to one of claims 1 to 8, characterized in that the light source-side part (4) of the light guide unit (3) has a plurality of light guides (12).
    [11]
    11. Lighting unit according to claim 9 or 10, characterized in that the light guides (12) are made of a transparent plastic.
    [12]
    12. Lighting unit according to one of claims 9 to 11, characterized in that each one light guide (12) each associated with a light guide (6), in particular a reflector (13). 13 lighting unit according to one of claims 9 to 12, characterized in that the light guides have a remote end portion which engages in the corresponding reflectors (13).
    [13]
    14. Light unit according to one of claims 9 to 13, characterized in that the light guides (6) associated light guide (12) on the radiating side to a common emission side face plate (12 ") are summarized.
    [14]
    15. Lighting unit according to one of claims 1 to 14, characterized in that a light source side surface (14) of the light source side part (4) of the light guide unit (3) is coated with aluminum and non-reflecting painted. 16. Light unit according to one of claims 1 to 15, characterized in that the light guide unit (3) by means of a holder (16) on a light source box (17) is fixed. Vienna, 18 July 2012 14/22
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    同族专利:
    公开号 | 公开日
    EP2875283B2|2019-05-01|
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    IN2015MN00111A|2015-10-16|
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    CN104428586A|2015-03-18|
    US20150192264A1|2015-07-09|
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    EP3578874A1|2018-06-04|2019-12-11|ZKW Group GmbH|Lighting device for a motor vehicle headlamp|
    EP3847056A4|2018-09-05|2021-10-27|Flex-N-gate Advanced Product Development, LLC|Vehicle adaptable driving beam headlamp|
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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 |
    2019-03-15| MM01| Lapse because of not paying annual fees|Effective date: 20180718 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50284/2012A|AT513206B1|2012-07-18|2012-07-18|Lighting unit for a headlight|ATA50284/2012A| AT513206B1|2012-07-18|2012-07-18|Lighting unit for a headlight|
    MX2015000791A| MX338221B|2012-07-18|2013-06-26|Lighting unit for a headlight.|
    PCT/AT2013/050130| WO2014012128A1|2012-07-18|2013-06-26|Lighting unit for a headlight|
    US14/415,362| US20150192264A1|2012-07-18|2013-06-26|Lighting unit for a headlight|
    BR112015000694A| BR112015000694A2|2012-07-18|2013-06-26|headlight light unit|
    EP13741656.6A| EP2875283B2|2012-07-18|2013-06-26|Lighting unit for a headlight|
    JP2015521911A| JP6044812B2|2012-07-18|2013-06-26|Lighting unit for headlamp|
    CN201380037987.8A| CN104428586B|2012-07-18|2013-06-26|Lighting unit for a headlight|
    IN111MUN2015| IN2015MN00111A|2012-07-18|2013-06-26|
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