• 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:
    An illumination device (1) with a rod-shaped light guide (2) and at least one light source (3) for feeding light into the light guide, which has a strip (4) extending in its longitudinal direction and having a light-refracting / scattering structuring (4s) for producing a light guide Principal light distribution in the sense of a magnified for a viewer by the curvature of the light guide cross-section illustration of structuring, offset from the main light axis (a) at least one of the light guide (2) protruding web (6) is provided, which at its end facing away from the light guide end is provided with an additional structuring (6s), which results in an additional illumination for a viewer away from the main light distribution.
    公开号:AT511476A4
    申请号:T823/2011
    申请日:2011-06-01
    公开日:2012-12-15
    发明作者:Friedrich Bauer；Peter Mejta；Markus Muckenhuber；Guenther Bauer
    申请人:Zizala Lichtsysteme Gmbh；
    IPC主号:
    专利说明:

    P12100
    Beleuchtlncsfinrichtung
    The invention relates to a lighting device with a rod-shaped light guide and at least one light source for feeding light into the light guide, the one extending in its longitudinal direction strip with a light refractive / scattering structuring to produce a main light distribution in the sense of a viewer for the curvature of the optical fiber cross-section enlarged illustration of structuring.
    Lighting devices of this type are often used mainly in motor vehicles, for example, as position lights, direction indicators, interior lights, contour lighting, tail lights and the like. More, which serve as light sources mostly LEDs. The rod-shaped optical fibers can be straight or curved and / or twisted.
    An illumination device mentioned in the introduction has become known from US 2005/0286262 A1, wherein a diffusion zone is provided in longitudinal grooves on the rear side of the light guide, which then appears correspondingly enlarged by the magnification effect of the cylindrical surface for the viewer.
    However, the viewer sees this magnified image only if he is actually from the front, i. looks at the illumination device essentially in the direction of the light axis. Further, as seen from above or below, the structure shown appears to be substantially narrower or completely irregular in curved or tortuous optical fibers, as will be illustrated below with reference to Figs. 1-3.
    An object of the invention is to provide a lighting device which provides the viewer with a more homogeneous appearance even from different angles, without the need for a high optical complexity, for example by special structures applied on the front side of the light guide PI 2100 PI 2100. , · · · · · * * * * * * «« * * * * * * I «*« # «·· *** • · ·
    would be required at increased losses of light intensity and correspondingly increased costs.
    This object is achieved with a lighting device of the type mentioned, in which according to the invention offset to the main light axis at least one protruding from the light guide web is provided, which is provided at its end facing away from the light guide end with an additional structuring, which is for a viewer away from the main light distribution an additional illumination results.
    Thanks to the invention, the additional structuring of the web is visible over a much larger area than the main structure, which results in a more uniform illumination image even when gradual disappearance of Hauptstrukturierung at off-axis viewing.
    It should be noted that the arrangement of a web on a rod-shaped light guide from DE 10 2006 015 156 A1 is known, but there serves the bridge for decoupling of light at certain points, for this purpose, for example, incisions are provided on the web.
    In terms of efficient light guidance, it is advantageous if the light guide has a substantially circular / elliptical cross section.
    If the strip is provided with structuring for the main light distribution in a longitudinal groove, it is protected against mechanical influences and the production of a prismatic structure is easier to make.
    In order to obtain the desired additional illumination efficiently, it is recommended that the web projecting backwards, parallel to the main light axis of the light guide or that the web substantially tangentially protrudes from the light guide. · «· · ·« «···· II» PI 2100
    In terms of effective dispersion of the light, it is advantageous if the main structuring and / or the additional structuring is prismatic.
    An overall compact and cheaper version results if the bridge is a mounting bar for the light guide.
    Also, it has proven to be practical if the thickness of the web is smaller than the average diameter of the light guide.
    The invention together with further advantages is described below with reference to an exemplary embodiment, which is illustrated in the drawing. In this show
    1 shows a cross section through a rod-shaped light guide according to the prior art,
    2a and 2b show two exemplary structuring for the generation of a main light distribution, seen from the rear side of the light guide,
    3a shows the appearance of a structuring in a straight light guide without additional structuring in front view according to the prior art,
    3b shows the appearance of a structuring in a straight light guide without additional structuring in top view according to the prior art,
    3c shows the appearance of structuring in a curved light guide without additional structuring when viewed obliquely from above according to the prior art,
    4 is a diagrammatic illustration of an example of a lighting device according to the invention, PI2100 PI2100 • * B * U * * 4 * * * * * * * * * * *
    »« * «I ♦ · ♦ · · · *
    Fig. 5a shows a cross section through an optical fiber of a lighting device according to the invention and Fig. 5b is a diagram of the associated light distribution and
    Fig. 6a shows an exemplary beam path through the web of a curved light guide according to the invention with a light deflection up to a viewer and
    Fig. 6b, the light guide of Fig. 6a in perspective view.
    The schematic representation of FIG. 1 shows a lighting device 1 according to the prior art, which consists in principle of a rod-shaped light guide 2 and a light source 3 for feeding light into the light guide. In the present case, the light is generated for example in a light-emitting diode or a diode array and fed into a coupling point 7 of the light guide 2, which in the present case is a planar end face of the light guide, but may also have a different geometry, for example, a concave or convex shaped surface.
    The cross section of the light guide 2 is substantially circular or elliptical, in which case it must be suitable in any case for guiding light in the longitudinal direction. The optical waveguide 2 has a strip 4 which extends in its longitudinal direction and is formed by a light-refracting / scattering structuring 4s which serves to produce a main light distribution in the sense of an image of the structuring which is magnified for a viewer by the curvature of the optical waveguide cross-section. The structuring is provided here in a longitudinal groove 5 and consists for example of a plurality of microprisms, a roughening or has another light-dissipating nature of the surface. In the present case, one recognizes the ribs of prisms, which run from top to bottom of the light guide and are arranged along the longitudinal direction thereof. The ribs themselves are not further structured in the present case, which would be quite possible.
    It should be understood that the provision of the strip 4 with the structure does not require the longitudinal groove 5 shown in this example. Alternatively to the groove, e.g. a cuboid structure be formed on the back of the light guide, which contains Auskoppelprismen.
    As indicated in Fig. 1, the dashed lines with the arrows, a viewer who is in front of the optical fiber and in the direction of the axis a, hereinafter referred to as main light axis a, an enlarged image of the structuring. If the longitudinal axis of the light guide 2 lies in a plane, one can also speak of a main light plane which contains the main light axis a.
    It should be made clear at this point that the terms front, back, top, bottom, etc. in this description are to be understood as relative statements that relate to the arrangement of the structuring 4s with respect to the optical fiber cross section, but not the corresponding topography, for example a motor vehicle. In particular, the term "front" in connection with the main emission direction of the light guide 2 is to be understood on the basis of the structuring 4s.
    The width of the strip 4 can be selected according to the particular application and they can also change in their course as desired, so that different light distributions along the light guide 2 occur. This is shown with reference to FIGS. 2a and 2b, wherein FIG. 2a shows a structured strip 4 of constant width and FIG. 2b shows a strip 4 whose width decreases in the longitudinal direction (in the drawing from right to left).
    The influence of the viewing angle or the elevation of a viewing eye with respect to the main light axis a will now be explained with reference to FIGS. 3 a to c. Here, Fig. 3a shows the appearance 4's of a strip 4 or its structuring 4s of certain width when viewed from the front, whereas Fig. 3b shows the appearance 4 "s of the same strip when viewed from the front and the top, just below a certain elevation angle. One recognizes that in this
    Case the optical image of the strip is considerably narrower. The same applies, of course, when viewed from the front and below. In the case of a curved optical waveguide 2, an additional inhomogeneity of the light distribution results if, as shown, one looks, for example, obliquely from above onto the optical waveguide 2.
    The angle of view from the side and diagonally above corresponds approximately to that under which one looks at a sheet of paper. From this angle, three different sectors are visible on the light guide, which are designated in Fig. 3c with Sl, S2 and S3.
    The first sector S1 (starting at the coupling point 7) extends to the end of a dark area. This is followed by the second brightness-changing second sector S2, and the third sector S3 starts after the second sector S2.
    As can be seen, structuring 4s is no longer visible in the first sector S1, so that this area of the light guide 2 therefore appears dark. In the second sector S2, the visible ribs of the structuring converge pointedly in the direction of the first sector S1. As a result, the light guide 2 always appears darker in the direction of the first sector S1. Only the third sector S3 appears uniformly bright, since here the ribs are constantly visible and in the same size. The point of view here is extremely selected in order to better illustrate the specific problem.
    If optical fibers of the described known type are arranged, for example, on the front side of a motor vehicle, the effects described in connection with the effects described in FIGS. 3a to c lead to the illumination structure being viewed axially, e.g. for a side of the vehicle or just in front of the viewer, some are no longer visible. The invention described in detail below avoids just this disadvantage.
    As FIG. 4 and FIG. 5 a show, it is provided in the case of an illumination device 1 in the sense of the invention that, offset from the main light axis a, a web 6 protruding from the light guide 2 is provided, which has an additional structuring 6s at its end facing away from the light guide which is for a
    Be the viewer apart from the generated by the structuring 4s of the strip 4 main light distribution results in additional illumination.
    In Fig. 5a, the thickness of the web 6 is denoted by d and the diameter of the light guide 2 by D, wherein it should be noted that D is to mean a mean diameter in general, since the cross-sectional shape of the rod-shaped light guide 2 will not always be circular, as For example, the embodiment of FIG. 4 shows.
    In the example shown, the structuring 4s of the strip 4 as well as the additional structure 6s at the free rear end of the web 6 of small prisms, which are arranged closer to one end of the light guide 2, to which the amount of light decreases more and more, to ensure a homogeneous illumination of the light guide. Since the additional structuring 6s is offset from the axis relative to the imaging surface of the optical waveguide 2, offset downwards in this case, a vertically highly distorted image of the additional structuring 6s ensues through further radiation of reflections upward. This is clearly visible below in Fig. 6a. The additional structure 6s is thus visible in contrast to the (main) structuring 4s over a much larger area, whereby the light coupled out by the (main) structuring 4s disappears when viewed off-axis.
    This effect is shown in the following figures. In the isolux diagram of Fig. 5b, the elliptic curves schematically represent the different intensities of the main light distribution produced by the prism 4s, with the light intensity being greatest in the center where the lines V-V and H-H intersect.
    Fig. 6a shows in the section through a light guide 2 in the invention an exemplary beam path through the web 6 and the light deflection upwards to * · · · ♦ ··· «· * · · · ♦ · ··« · PI2100 • • «V · · · · · # ·· · · · · * * *% * ·· '*« »* · · · · ···
    * * · * T * t · ·· I -8- the eye of an observer. A corresponding representation on a section of a light guide shown schematically can be found in Fig. 6b.
    The web 6 serves, as described above, to generate additional illumination by its additional structuring 6s, but results as a useful side effect that the web 6 can also serve as a mounting web for the device. In special cases, more than one web 6 could be provided, which is shown in Fig, 5a by a second, indicated by dashed lines 6 '. In other cases, for example, when used as interior lighting on the headliner, the bridge "top". be arranged, i. the web 6 'present, the web 6, however, be omitted. As can be seen, the thickness d of the web 6 in the preferred embodiments is appreciably smaller than the average diameter D of the optical fiber 2.
    With the help of the rearwardly projecting web 6, the light guide 2 can be kept and no holding means on the rod-shaped light guide itself must be formed. As a result, there are no significant light losses. Namely holding means are formed on the light guide, so passes through this light at undesirable places, since the light propagates so well in the holding means.
    The additional structuring 6s expediently, but by no means necessarily, has the same geometry as the main structuring 4s, e.g. a periodic serrated or rectangular structure, as this results in the desired "lamination effect". is best realized and the tooling costs are lower in the production, as with different geometry of the two structuring.
    The cross section of the light guide 2 need not necessarily be circular or elliptical, it should only be designed so that a good light guide along the light guide is possible, except for those areas in which the web 6 attaches or a groove is provided for the main structuring because there the cross-sectional shape is for some reasons anyway not circular or elliptical. -9 P12100
    However, deviations from the circular cross section, which are desired for reasons of design, for example, lead to losses in efficiency.
    As far as the thickness of the web is concerned, this has a direct effect on the efficiency of the light guide, since the web represents a disturbance of the circular cross section, which is optimal for the light pipe by total reflection .. Conveniently, the web is as narrow as possible, but without diminishing the desired laminating effect. 1 * »i i» * * * * * m • * # * · · ψ Λ • * * * * f V I »· '' · 1 *« v - # * • · * * · 4 | ΡΊ2100 I «· IM *« |
    List of reference numbers
    lighting device
    optical fiber
    light source
    Strip (main) structuring
    He looks like a picture
    Appearance longitudinal groove
    web
    web
    Additional structuring light input surface main light axis thickness of 6 average diameter of 2 sector
    sector
    sector
    权利要求:
    Claims (8)
    [1]
    PI2100 > Claims 1. A lighting device (1) with a rod-shaped optical waveguide (2) and at least one light source (3) for feeding light into the optical waveguide, one in its longitudinal direction extending strip (4) with a light-refractive / scattering structuring (4s) for generating a main light distribution in the sense of a viewer through the curvature of the optical fiber cross section enlarged illustration of structuring has, characterized in that offset from the main light axis ( a) at least one of the light guide (2) projecting web (6) is provided, which is provided at its end facing away from the light guide end with an additional structure (6s), which results in an additional illumination for a viewer away from the main light distribution.
    [2]
    2. Lighting device (1) according to claim 1, characterized in that the light guide (2) has a substantially circular / elliptical cross section.
    [3]
    3. Lighting device (1) according to claim 1 or 2, characterized in that the strip (4) is provided with structuring (4s) for the main light distribution in a longitudinal groove (5).
    [4]
    4. Lighting device (1) according to one of claims 1 to 3, characterized in that the web (6) projects rearward, parallel to the main light axis (a) of the light guide (2).
    [5]
    5. Lighting device (1) according to one of claims 1 to 4, characterized in that the web (6) protrudes substantially tangentially from the light guide (2).
    [6]
    6. Lighting device (1) according to one of claims 1 to 5, characterized in that the main structuring (4s) and / or the additional structuring (6s) is prismatic.
    [7]
    7. Lighting device (1) according to one of claims 1 to 6, characterized in that the web (6) is a mounting web for the light guide (2).
    [8]
    8. Lighting device (1) according to one of claims 1 to 7, characterized in that the thickness (d) of the web (6) is smaller than the average diameter (D) of the light guide (2). Vienna, 1 June 2011
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    引用文献:
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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 |
    2019-02-15| MM01| Lapse because of not paying annual fees|Effective date: 20180601 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA823/2011A|AT511476B1|2011-06-01|2011-06-01|LIGHTING DEVICE|ATA823/2011A| AT511476B1|2011-06-01|2011-06-01|LIGHTING DEVICE|
    EP12168849A| EP2530503A1|2011-06-01|2012-05-22|Illumination device|
    CN201210179581.0A| CN102997083B|2011-06-01|2012-06-01|Lighting device|
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