• 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:
    Light system (2) for a motor vehicle, comprising at least two light sources (12a to 12d), at least two light guides (11a to 11d), at least one downstream translucent radiating element (10) and at least one control unit (5) for staggered driving the at least two light sources (12a to 12d), wherein the at least two light sources (12a to 12d) are adapted to couple light in each case a light guide (11a to 11d), wherein the light guides (11a to 11d) each have at least one light outcoupling portion (14a to 14c) which is adapted to couple light into a light coupling section (19) of the radiating element (10), wherein the light coupling section (19) of the radiating element (10) is step-shaped.
    公开号:AT516259A4
    申请号:T50793/2014
    申请日:2014-11-03
    公开日:2016-04-15
    发明作者:Laura Leber；Anton Faffelberger
    申请人:Zizala Lichtsysteme Gmbh；
    IPC主号:
    专利说明:

    Lighting system for a motor vehicle
    The invention relates to a lighting system for a motor vehicle, comprising at least two light sources, at least two light guides, at least one downstream transparent radiating element and at least one control unit for staggered driving the at least two light sources, wherein the at least two light sources are adapted to couple light in each case a light guide the optical waveguides each have at least one light outcoupling section, which is set up to couple light into a light coupling-in section of the radiating element. In this case, each light source is preferably associated with one light guide in each case.
    Furthermore, the invention relates to a motor vehicle with a Licht¬system invention and a motor vehicle headlamp with a light system according to the invention.
    Light systems are known from the prior art in which individual light sources can be controlled independently of one another, wherein the light emitted by the individual light sources is radiated by light guides arranged side by side or directed in a desired direction. The light sources are controlled such that the time profile of the light emitted by the light source amount of light is selected so that the impression of a moving light image or a light distribution (or an appearance image), a so-called running light is obtained and thereby a Lauf¬ light effect can be achieved. Such a lighting system or a method suitable for this purpose has become known, for example, from WO 2013/120124 A2. Therein light guides radiate in a common emission direction or couple light in this direction, wherein individual optical fibers are offset from each other normal to the emission direction. The replacement between the light guides produces dark, less intensively illuminated areas in the light image of such a light system, which impairs the impression of a smooth transition between the light beams emitted by the light conductors, since the individual light conductors can be recognized as such.
    It is therefore an object of the invention to provide a lighting system which is inexpensive and easy to manufacture, has a high mechanical strength and provides a comparison with the prior art improved, homogeneous continuous light image.
    This object is achieved in a first aspect of the invention with a lighting system of the type mentioned, in which the Lichteinkopplungsabschnitt the Abstrah¬lelements is step-shaped.
    This makes it possible to guide the optical fibers close to one another and to emit the light emitted by the individual optical fibers via the emitting element. Preferably, the optical fibers may be placed at a constant distance behind the radiating element without the optical fibers having to be strongly curved along their longitudinal extent. Each optical fiber has a light extraction section associated with a portion of the light coupling section of the radiating element. This makes it possible to achieve an extremely robust and compact construction of a lighting system which is particularly well suited to the generation of a running light by smoothing the transition between the light images generated by the optical fibers is made possible so that designs can be achieved that is unreachable with a single light guide. So it is e.g. possible to arrange the optical fibers in a plane which is oriented parallel to the emission direction of the optical fibers, so that individual optical fibers can be arranged one behind the other in the direction of the radiation. The Lichteinkopplungsab¬ section and a light exit surface of the radiating element may each have a stepped course, so that a lateral offset of individual light beams is prevented.
    Under the term "timing drive " For example, it is understood to mean a controller capable of applying individual light sources with mutually different signals. Apart from a time offset, the signals may have the same course or be completely different. Examples of possible control signals and resulting light images or light intensities of individual light sources can be found in WO 2013/120124 A2. For the purposes of the present invention, a light guide means a structure in which incident light along the extension of the light guide can be reflected by total reflection on the walls. Such a light guide can be designed as a solid body. In this context, it is preferred that the light guide is made of a transparent colorless plastic. Alternatively, this can be made of glass or of any other Mate¬rial, for example silicone, which is suitable for light transmission. The radiating element may also be formed as a solid and, for example, be made of plastic, glass, silicone or any other material which is suitable for light conduction. LEDs are preferably suitable as light sources. Alternatively, it is also possible to use any other light source known to the person skilled in the art, such as incandescent lamps, xenon lamps, etc.
    In this case, it may be favorable if the light guides have two straight legs which communicate with one another by means of a curved section, the straight legs forming an angle of at least 60 ° to one another. As a result, a particularly compact construction of the lighting system according to the invention is made possible.
    It may be particularly useful when the light guides are designed as light rods. Light rods have good light-guiding properties with a small footprint and good mechanical strength and are therefore particularly well suited as a light guide. The diameter of the light rods may preferably be between 6 mm and 10 mm Glow sticks in the light outcoupling section have optically effective impurities configured to deflect light propagating along the light stick such that it emerges from the glow stick through the light outcoupling section and enters the light injecting section of the emitting element. The impurities may preferably be formed as prisms or prism-like protrusions / depressions within the illuminated rod.
    In order to obtain a particularly simple and robust construction of the invention, it can be provided that the radiating element is made in one piece.
    In addition, it can be provided that the emission element has a continuous light exit surface. A continuous light exit surface is understood to be a light exit surface which is delimited by edges which, apart from the corner points, have a continuous course.
    A particularly compact construction of the invention can be achieved if the number of light guides exceeds the number of stages by the value one. Therefore, n + 1 optical fibers are assigned to a number of n stages.
    It is advantageous if at least three light guides are provided, whereby a particularly well-resolved light image can be achieved. The number of optical fibers or stages may be exactly or at least three, four, five, six or more.
    In order to have sufficient distance between the optical fibers and at the same time to bring the light outcoupling surfaces of the optical fibers as close as possible to the light coupling surfaces of the radiating element, it may be provided that the height h of each step is greater than the diameter of a corresponding optical fiber.
    Preferably, the individual optical fibers may extend at least in sections substantially parallel to each other. As a result, a particularly compact design of the Lichtsys¬tems is possible. Under the term "substantially parallel" In this case, an orientation of the light guides is understood which deviates from one another by an angle of at most 5 °. Preferably, the deviation of the orientation of individual light guides to one another is at an angle of 1 °.
    To prevent unwanted light coupling between the individual light guides, it can be provided that aperture elements are arranged between the light guides.
    In addition, individual optical fibers may be at least 1mm apart to allow some freedom of movement with each other. This can be cushioned by vibration caused movements without the fibers rub against each other and thus their surface would be damaged. Even inaccuracies that are due to manufacturing tolerances can be compensated.
    In an analogous manner, it can be provided that the light extraction section of the light guide is spaced at least 1 mm from the light coupling section of the emission element.
    In a further aspect, the invention relates to a motor vehicle and a motor vehicle headlight with a lighting system according to the invention.
    The invention is explained in more detail below with reference to several exemplary and non-limiting embodiments, which are illustrated in the figures. Show it
    1 is a schematic representation of a lighting system according to the prior art,
    Fig. 2 is a schematic representation of an embodiment of a lighting system according to the invention;
    Fig. 3 is a perspective view of the light guide and the radiating element according to
    Fig. 2,
    4 shows a detailed representation of individual components of the lighting system according to FIG. 3, FIG.
    5 is a further perspective view of a section of individual components of the light system according to FIG. 4, FIG.
    FIG. 6 shows in a detail illustration of FIG. 5 an exemplary profile of a light beam a and the light-emitting element 10 coupled to the emitting element 10 and emitted by the latter
    6a shows a simplified illustration of the transition of the light beam a from the light guide 11b into the emission element 10.
    In the following, unless otherwise stated, like reference numerals denote the same features.
    Figure 1 shows a schematic representation of a lighting system 1 according to the prior art. Therein, a control unit 5 can be seen, which is connected to the light sources 22a to 22d. The light sources 22a to 22d couple light into downstream light guides 21abis 21d, which in turn abstract light / decouple light in the direction V shown by arrows. Due to the structural design of the lighting system according to the prior art, in particular by the spacing of the light guides 21a to 21d to each other, arise between light images VA to VD, which are assigned to the respective optical fibers 21a to 21d, dark areas VO, between the brightly illuminated areas V- Abis VD come to rest and affect a driven by the control unit 5 running light effect in its quality or provide a continuous homogeneous light image.
    Figure 2 shows a schematic representation of an exemplary embodiment of a light system 2 according to the invention. Therein again a control unit 5 can be seen, which is connected to light sources 12a to 12d, which light guides 11a to lld are arranged downstream, so that the light sources 12a to 12d couple light into the light guides 11a to lld. The light guides 11a to 11d are designed as light sticks, which in the exemplary embodiment shown have two straight legs 11d and 1d "and a curved section connecting the straight legs 11d '. For simplifying the illustration of Fig. 2, only the light guide 1ld has been given the corresponding reference numerals and the remaining light conductors 11a to 11c are shaped in an analogous manner). Alternatively, the light guides 11abis lld or glow sticks could also have any other shape. The light guides 11a to 11d are preferably designed as a solid body, which may for example consist of transparen¬tem polycarbonate. The thighs lld 'and lld' " are at an angle of at least 60 ° to each other. The light source 12d feeds light into the straight leg lld ', which passes over the curved section lld " in the subsequent straight Schenkellld '" where it passes to a light extraction section 14d (analogous to Figs. 14a to 14c) shown in Fig. 3 and introduced into a downstream translucent radiating element 10. For this purpose, the radiating element 10 Licht¬einkopplungsflächen 18a to 18d, which form together with inclined step surfaces 17abis 17c a stepped Lichteinkopplungsabschnitt 19 of the radiating element 10. The legs lld '" (And analogous thereto corresponding legs of the optical fibers 11a to 11c) are received in the stages or abut on corresponding surfaces of the steps. The radiating element 10 is adapted to emit light in the emission direction V, the light thereby exiting through the light exit surface 25 of the radiating element 10, so that no dark region comes to lie between the light images generated by the individual light sources 12a to 12b. A running light effect can be achieved, for example, by successive switching on of the light sources 12d to 12a. Also, arbitrary transitions of the luminous intensity of the light emitted by the light sources 12a to 12d light can be specified. Of course, it is possible to arbitrarily vary the number of light sources as well as the light guides, wherein at least two light sources and optical fibers must be provided. In this case, the light sources are preferably controlled in a time sequence with which a running light effect can be achieved, which is directed from a vehicle interior to a vehicle exterior. In the present arrangement, this corresponds to an order in which first the light source 12d, then 12c, 12b and last 12a is activated.
    Such a photograph is particularly uniform and has no undesirable dark areas. The running direction of the running light is indicated in Fig. 2 by an arrow indicated by the letter L. In order to comply with legal requirements when used on a vehicle, it may be provided that the running direction L of the running light generated by the light system 2 extends from the vehicle center to an outside area of the vehicle, for example from a vehicle radiator / grill towards the fender of a vehicle. The radiating element 10 is embodied in one piece in the illustrated embodiment and has a continuous light exit surface 25.
    The diameter d of the light rods (see FIG. 2) is less than the height h of the corresponding stage (see FIG. 4), which is preferably at least 1 mm larger than the diameter d. Typical diameters of the light guides 11a to lld and of the light rods, respectively, are between 6 mm and 10 mm. The individual optical waveguides 11a to 11d preferably run at least in sections substantially parallel to one another, whereby the light sources 12a to 12d assigned to the optical waveguides 11a to 11d can be arranged close to one another and mounted on a common heat sink. This allows a more compact design. Between the optical fibers 11a to 11d, aperture elements, not shown, may be arranged in the figures, which are opaque and thereby can prevent undesired coupling between the optical fibers 11a to 11d. Preferably, the light outcoupling sections 14a to 14d of the optical waveguide 11abis lld spaced by a distance s of at least 1 mm from a corresponding Lichteinkopplungsabschnitt 18a to 18d of the radiating element 10 spaced. In other words, the optical fibers 11a to 11d have regions (light extraction portions 14a to 14d) from which light is deflected forward into the radiating element 10 by deflecting prisms (the impurities 13). In addition, the optical fibers 11a to lld to
    Direction of the light towards the light extraction sections 14a to 14d areas with vor¬zugsweise a smooth coat on to forward as lossless light.
    FIG. 3 shows a perspective view of a section of the light system 2 according to FIG. 2, in which only three light guides 11a to 11c are shown. Therein, light entry surfaces 20a to 20c of the optical fibers 11a to 11c are shown, into which the light sources 12a to 12c not shown in FIG. 3 couple light. These light entry surfaces are shown only schematically and by way of example and may, of course, be differently designed and adapted to the radiation characteristics of the light sources used to ensure efficient utilization of the radiated luminous flux. The light guides 11a to 11c each have a light outcoupling section 14a to 14c, each with optical defects or impurity elements 13a to 13c are provided, which are beispiels¬weise designed as a prism-like projections or depressions. The impurities or impurity elements 13a to 13c (each optical fiber preferably has at least one Lichtauskopplungsabschnitt with impurities) are adapted to couple light into corresponding Lichteinkopplungsflächen 18a to 18c of the radiating element 10, wherein the sum of Licht¬einkopplungsflächen a Lichteinkopplungsabschnitt For the invention, it is essential that each optical fiber has a region for efficiently transmitting the light which is free of impurities (eg, by a smooth outer contour, as in optical fibers) - corresponding to the "optical fiber portion". 15. In addition, each optical fiber has an area for decoupling light, namely, a "light extraction section". 14, wherein the Lichtauskopp- ment using arranged within the light outcoupling portion 14 impurities, e.g. Prism surfaces 13, takes place.
    The optical fiber outcoupling sections 14a, b, c, d are associated with the radiating element irradiation areas 18a, b, c, d.
    Fig. 4 shows a detailed representation of individual components of the light system 2 according to Fig. 3. It can discern the height h of a step of the radiating element 10 formed by the step surface 17b (or 17a). Step surfaces 17a and 17b (as well as the other step surfaces not shown in Figure 4) are defined by corresponding edges 36b, 37a, the edge opposite edge 37a (not visible in Figure 4), and edges 38a and 36c, 37b and 38b, respectively etc. limited. The edges 36b, 39b (as well as a parallel edge not shown to the edge 39b in this figure) and 38b define the light input surface 18b (this applies to other light input surfaces in an analogous manner).
    FIG. 5 shows a further perspective view of a section of individual components of the light system 2. It can be seen that the step surface 17a or the edge 37a is oriented parallel to a vehicle axis, the vehicle axis pointing in the direction of travel when the vehicle is traveling straight ahead. As a result, it is possible to keep areas lying between the light coupling-out sections 14a to 14c as small as possible and thereby to achieve homogeneous light emission. The light images V-A and V-B generated by the radiating element 10 and the associated light guides 11a and 11b overlap, so that no dark areas occur between the light images V-A and V-B.
    FIG. 6 shows, in a detailed illustration of FIG. 5, an exemplary profile of a light beam a coupled in through the light-emitting conductor 11b and emitted by the light-emitting element a. The light beam a is reflected at an impurity 13b (for example, a prism surface), which is shown in detail in FIG. 6a, at the nearest point in the light propagation direction (ie, at a first coupling-out point), the light beam a at the transition from the light guide 11b and into the emission element 10 This shifts the light beam a laterally, the offset from the refractive indices of the materials of the light guide and the radiating element and the surrounding medium (air) and the size of the light source Distance s is dependent. The light beam a is reflected by the position and configuration of the impurity 13bl in such a way that it is offset and parallel oriented with respect to the vehicle axis after exiting from the optical waveguide 11b, so that an imaged in front of the radiating element 10, lying between the Auskoppβlungsabschnitten 14a and 14b Area is also supplied with light rays and illuminated. The reference numeral n designates a normal axis on a prism surface of an impurity.
    6a shows a simplified representation of the transition of the light beam a from the light guide 11b into the emission element 10, in which the refraction of light in the transition between the light guide 11b and the emission element 10 has been neglected. A lateral displacement 6L corresponds to the normal distance of the edge 38a or the step surface 17a to a first defect 13bl of the light guide 11b, so that the light beam a exiting the light guide 11b is directed past the edge 38 and into the boundary region of the light Pictures LA and LB shines.
    A recommended minimum value for the lateral displacement OIL is calculated from the following parameters shown in Fig. 6a: Oil ... Lateral displacement in (horizontal) normal direction to the vehicle axis OIL * ... Lateral displacement along the optical fiber h ... Height of the gradation d. .. Diameter of the light guide s ... Width of the air gap between the light guide and the step body α ... Tilting (at the respective gradation) of a light guide carrier curve to
    Vehicle transverse direction n ... refractive index of the materials (nl for optical fiber, n2 for radiating element) oil = oil + oil2 = (oil * + oil2 *) · cos α = cos α · {D * · ([sin (α - ßi)] / [sin γ]) + h · ([sin φ] / [sin (90 ° + β2)])} = cos α · {D * · ([sin (α - βi)] / [cos (βi)] ) + h · ([sin (α - β2)] / [cos (β2)])} with sin α = m sin βi & sin α = n2 sin ß2 as well as D * = d / cos a For nl = n2 = n (thus ßi = ß2 = ß) the expression for the lateral displacement of the first impurity element l3bl = cos α · ([sin (α - ß )] / [cos (ß)]) {D * + h}
    This results in a minimum value for the lateral displacement of oil according to 6L * = 5L / (cosa). All of the abovementioned embodiments according to the invention can be produced inexpensively and efficiently and make possible a compact arrangement of the light sources, which for example can be arranged on a common heat sink and / or a common board.
    In view of this teaching, the invention may be varied as the skilled person knows and therefore is not limited to the embodiments shown. Also, individual aspects of the invention may be grasped and combined. Essential are the ideas underlying the invention, which may be carried out in a variety of ways by a person skilled in the art having this description in mind, and nevertheless remain maintained as such.
    权利要求:
    Claims (14)
    [1]
    Claims 1. A light system (2) for a motor vehicle, comprising at least two light sources (12a to 12d), at least two light guides (11a to lld), at least one downstream lichtdurchläs¬siges radiating element (10) and at least one control unit (5) for staggered driving the at least two light sources (12a to 12d), wherein the at least two light sources (12a to 12d) are adapted to couple light into a respective light guide (11a to lld), the light guides (11a to lld) each having at least one light output Lung portion (14a to 14c) which is adapted to couple light into a Lichteinkopplungsabschnitt (19) of the radiating element (10), characterized in that the light coupling portion (19) of the radiating element (10) is formed step-shaped.
    [2]
    2. Light system (2) according to claim 1, characterized in that the light guides (11a to dll) have two straight legs (lld ', lld' "), which communicate with each other by means of a curved section (lld "), the straight legs (lld ', lld' ") forming an angle of at least 60 ° with each other.
    [3]
    3. lighting system (2) according to claim 1 or 2, characterized in that the Lichtlei¬ter (11a to lld) are designed as glowing rods.
    [4]
    4. Lighting system (2) according to one of claims 1 to 3, characterized in that the radiating element (10) is made in one piece.
    [5]
    5. lighting system (2) according to claim 4, characterized in that the emission element (10) has a continuous light exit surface (25).
    [6]
    6. Lighting system (2) according to one of claims 1 to 5, characterized in that the number of light guides (11a to lld) exceeds the number of stages by the value one.
    [7]
    7. lighting system (2) according to one of claims 1 to 6, characterized in that zumin¬dest three light guides (11a to lld) are provided.
    [8]
    8. lighting system (2) according to one of claims 1 to 7, characterized in that the height (h) of each stage is greater than the diameter (d) of a corresponding Lichtlei¬ters (11a to lld).
    [9]
    9. lighting system (2) according to one of claims 1 to 8, characterized in that individual light conductors (11a to lld) at least partially substantially parallel to each other.
    [10]
    10. lighting system (2) according to one of claims 1 to 9, characterized in that zwi¬schen the optical fibers (11a to lld) diaphragm elements are arranged.
    [11]
    11. A lighting system (2) according to any one of claims 1 to 10, characterized in that individual light guides (11a to lld) are at least 1 mm apart from each other.
    [12]
    The light system (2) according to any one of claims 1 to 11, characterized in that the light extraction section (14a to 14c) of the light guide (11a to lld) is spaced at least 1 mm from the light coupling section (19) of the radiating element (10).
    [13]
    13. Motor vehicle with a lighting system (2) according to one of the preceding claims.
    [14]
    14. A motor vehicle headlight with a lighting system (2) according to one of the preceding claims.
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    同族专利:
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    CN112503479B|2020-12-29|2021-11-02|南通合硕电子有限公司|Steering lamp|
    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 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50793/2014A|AT516259B1|2014-11-03|2014-11-03|Lighting system for a motor vehicle|ATA50793/2014A| AT516259B1|2014-11-03|2014-11-03|Lighting system for a motor vehicle|
    PCT/AT2015/050271| WO2016070210A1|2014-11-03|2015-10-29|Light system for a motor vehicle|
    EP15793688.1A| EP3215791A1|2014-11-03|2015-10-29|Light system for a motor vehicle|
    CN201580059254.3A| CN107148534B|2014-11-03|2015-10-29|Light system for a motor vehicle|
    US15/523,493| US10047924B2|2014-11-03|2015-10-29|Light system for a motor vehicle|
    JP2017542209A| JP6334068B2|2014-11-03|2015-10-29|Automotive light system|
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