• 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:
    The invention relates to a lighting arrangement (1) with at least one light source (4), in particular an LED, and a flat light guide (2) for emitting light via at least one of the flat sides (6) of the flat light guide (2), the lighting arrangement (1) Has at least one further light guide (3) which is arranged on one of the narrow sides or the end faces (7) of the flat light guide (2), the light source (4) being arranged on one of the end faces (9) of the further light guide (3) and wherein on the further light guide (3) on the side facing the flat light guide (2) (8) a plurality of structures (5) are provided for decoupling the light from the further light guide (3).
    公开号:AT16666U1
    申请号:TGM340/2015U
    申请日:2015-11-16
    公开日:2020-04-15
    发明作者:Keller Katharina
    申请人:Zumtobel Lighting Gmbh；
    IPC主号:
    专利说明:

    description
    LIGHTING ARRANGEMENT The present invention relates to a lighting arrangement with at least one light source, in particular an LED, and a flat light guide for emitting light via at least one of the flat sides of the flat light guide.
    In lighting arrangements with flat light guides, it is usually provided that the flat light guides emit their light through one of the flat sides of the flat light guides or that the light is coupled out from one of the flat sides from the flat light guides.
    Such flat light guides can be, for example, a light guide which is essentially rectangular in cross-section, in which case it is provided in particular that two large wide flat sides are arranged opposite one another and corresponding narrow sides or end faces on the sides as well are arranged opposite each other. These narrow sides or end faces, which are also to be viewed as side surfaces or long sides of the flat light guide, are designed to be considerably thinner or narrower than the flat sides, so that a plate results as a flat light guide.
    In lighting arrangements with such flat light guides, it has so far mostly been provided to arrange corresponding light sources, in particular LEDs, in the longitudinal direction on the narrow sides or end faces of the flat light guide, which couple light directly into the flat light guide via the narrow sides or end faces. The light coupled into the planar light guide by the light sources or LEDs via the narrow sides or end faces is then mixed in the planar light guide, the planar light guide being designed in such a way that due to corresponding total reflections within the planar light guide, the light is guided through the planar light guide and is then emitted or coupled out on one of the two or on both flat sides of the flat light guide. The mixing takes place in the flat light guide, while the light is guided through the flat light guide.
    However, this configuration has some disadvantages. For example, if the light color or color temperature of the emitted light is to be set by combining different LED types and changing the respective output, the problem arises that optimal mixing of the light of the different LED types is not achieved, which is particularly the case in the edge areas of the flat light guide leads to inhomogeneities with regard to the color or the color temperature, through which a uniform light emission is impaired.
    Another problem is that depending on the power of the respective LEDs, a certain distance between the LEDs on the narrow side or end face of the flat light guide is to be selected in order to emit light with the desired brightness. In this case, it is quite possible that a relatively large distance should be selected for powerful LEDs, which in turn leads to inhomogeneities in terms of brightness when the flat light guide is emitted.
    Furthermore, a problem can also be that, for example, in particular in the edge areas of the flat light guide, the light output is somewhat weaker, since the direct arrangement of the LEDs on one of the narrow sides or end faces cannot guarantee that the light is uniform is distributed over the entire flat light guide.
    The present invention is accordingly based on the object, the disadvantages in the arrangement of the LEDs or the light sources directly on a Schmalsei / 15th
    AT 16 666 U1 2020-04-15 Austrian patent office or face of the flat light guide. In particular, it is an object of the present invention to develop a lighting arrangement in which the most homogeneous possible light emission is possible via at least one of the flat sides of the flat light guide.
    The object of the present invention is achieved by a lighting arrangement according to claim 1. The dependent claims advantageously develop the core idea of the present invention.
    The present invention relates to a lighting arrangement with at least one light source, in particular an LED, and a flat light guide for emitting light via at least one of the flat sides of the flat light guide, the lighting arrangement having at least one further light guide, which is on one of the narrow sides or the end faces of the flat light guide is arranged. The light source is arranged on one of the end faces of the further light guide and on the side of the further light guide facing the planar light guide, several structures are provided for decoupling the light from the further light guide.
    According to the invention, it is now provided that the light sources or the LEDs are no longer arranged directly on one of the narrow sides or end faces of the flat light guide. Rather, there is another light guide through which it is achieved that the light emitted by the light sources or LEDs is already completely or at least partially mixed and evenly distributed when coupling via the narrow side or end face into the flat light guide, as a result of which the coupling is as uniform as possible of light is reached in the flat light guide.
    It is advantageously provided that the light source is arranged on one of the end faces of the further light guide such that the light from the light source is coupled into the further light guide via the end face and the further light guide is arranged on one of the narrow sides or the end faces of the flat light guide it is arranged that the light coupled out via the structures for coupling out is coupled into the flat light guide via the narrow side or the front side.
    Furthermore, it can also be provided that the further light guide is configured such that the light coupled in from the light source via the end face is distributed in the longitudinal direction in the further light guide.
    Specifically, this is achieved in that the light emitted by the light source and coupled to one of the end faces of the further light guide is guided through the further light guide due to corresponding total reflections within the further light guide and therefore not to one of the surfaces of the further light guide exit. However, the light can enter the structures for coupling out and then exit accordingly through these structures and can thus be coupled out of the further light guide. Similar to the flat light guide, the light within the further light guide is already mixed with the other light guide while it is being guided through the further light guide.
    This ensures that the light is already mixed when leaving the further light guide via the structures for decoupling and is largely evenly distributed. This essentially uniformly distributed and mixed light can then enter the flat light guide via the narrow sides or end faces or is coupled in accordingly. That is to say, in contrast to the prior art, in which punctiform light sources are arranged on the narrow side or end face of the planar light guide, which lead to the corresponding disadvantages mentioned above, it is provided in the present invention that the light entering via the narrow sides or end faces already mixed accordingly and evenly distributed.
    [0016] This leads, for example, to the fact that when light is emitted via the flat sides of the flä2 / 15
    AT 16 666 U1 2020-04-15 Austrian patented light guide no more inhomogeneities occur with regard to the light color or color temperature. It should also be noted that the light emitted by the further light guide and coupled into the flat light guide via the narrow sides or end faces still continues to be mixed within the flat light guide as before, so that even in the event that the further light guides do not emit completely mixed and completely evenly distributed light, it can be ensured that the light emitted by the flat sides or one of the flat sides of the flat light guide is homogeneous in the light color rendering or color temperature rendering. The same applies to the distribution of the brightness when emitting light, whereby the solution according to the invention also ensures that there are no inhomogeneities that would arise due to the arrangement of selective light sources along one of the narrow sides or end faces of the planar light guide.
    It is advantageously provided that the further light guide is narrow and elongated and / or is essentially rectangular in cross section.
    This then makes it possible for the further light guide to extend over the entire length of the narrow side or the end face of the flat light guide on which it is arranged.
    [0019] Furthermore, it can be provided that the arrangement has a plurality of light sources, in which case light sources can then be arranged on both end faces of the further light guide. In addition, it is also possible for the lighting arrangement to have a plurality of further light guides, each of the further light guides each having at least one light source on one of its end faces. It can be provided that further light guides are arranged on two opposite narrow sides or end faces of the flat light guide. However, it would also be possible for further light guides to be arranged on three or more narrow sides or end faces of the flat light guide.
    In addition, it can be provided that the structures for decoupling directly rest on the narrow side or the end face of the flat light guide, on which the further light guide is arranged. In this case, a transition material, for example silicone, can be provided between the structures for decoupling and the narrow side or the end face of the flat light guide, the transition material in particular supporting the transition of the light from the further light guide into the flat light guide. It would also be possible for the entire flat light guide to be made of silicone.
    Alternatively, it can also be provided that the structures for decoupling are spaced from the narrow side or the end face of the flat light guide, on which the further light guide is arranged.
    In addition, it can also be provided that the structures for decoupling are cylindrical, cuboid or truncated cone-shaped, the structures for decoupling then being able to be designed such that the light is decoupled in particular via the outer surfaces or peripheral surfaces of the structures.
    [0023] The structures for coupling out can be, for example, deepening structures. Likewise, the structures for decoupling can also be raised structures that bundle the light perpendicular to the narrow side or end face of the planar light guide, these structures then being able to be configured such that the surface of the structures which is directly or directly associated with the connected further light guide is smaller than the area that faces the flat light guide. This then results, for example, in the shape of a truncated cone.
    [0024] A frustoconical configuration of the structures for decoupling can furthermore, for example, also achieve that, by the corresponding inclination of the peripheral surfaces or lateral surfaces of the structures, the angular range,
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    in which light enters the flat light guide is influenced, for example in order to additionally optimize the glare control in a certain direction.
    The structures for decoupling also have the advantage that, in particular in the event that the structures for decoupling are arranged at a distance from the planar light guide and the light is decoupled essentially via the outer surfaces or peripheral surfaces of the structures for decoupling , the light entering the flat light guide can only enter it at certain angular ranges. This also contributes to better mixing and overall more homogeneous light emission via the flat light guide.
    [0026] Furthermore, it can be provided that the plurality of structures for coupling out have the same distance from one another or that the distance between the several structures for coupling out varies.
    The freedom in the positioning of the structures for coupling out results, inter alia, from the arrangement of the light source on one of the end faces of the further light guide. In this way, the spacing of the structures for decoupling from one another can in principle be selected independently of the power of the LEDs in order to achieve a uniform coupling of light over the entire narrow side or end face of the flat light guide.
    For example, in the event that light sources are arranged on both opposite end faces of the further light guide, there is the possibility that a uniform distance between the structures is selected for coupling out over its entire length. However, it would also be conceivable that the distance is varied over the length of the further light guide in order to either achieve a more uniform light emission or light coupling into the flat light guide or to cause variations in the light coupling.
    Advantageously, it can further be provided that the lighting arrangement has one or more reflectors, which is / are arranged such that the major part of the light emitted by the light source is coupled into the further light guide and via the structures for coupling out is coupled out of the further light guide and is coupled into the flat light guide.
    In addition, there is also the possibility that recesses or other structures are arranged on the narrow side or end face of the planar light guide, which correspond to the structures for decoupling or interact with them accordingly. The structures for decoupling can, for example, protrude into such structures, which are arranged on the narrow side or end face of the planar light guide, in the event that corresponding recesses are involved.
    Overall, the present invention has the advantage that the light coupled into the flat light guide on one of the narrow sides or end faces is already largely mixed and is distributed more uniformly over the entire length. This ensures that the light output via the flat sides or one of the flat sides of the flat light guide takes place more homogeneously overall.
    [0032] The present invention is described in more detail below with reference to the attached figures:
    FIG. 1 schematically shows a lighting arrangement according to the invention in a plan view with respect to the flat light guide; FIG. 2 shows a side view with respect to the flat light guide, a sectional view of the lighting arrangement shown in FIG. 1; FIG. 3 again shows a sectional side view with a further light guide compared to FIG. 2;
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    Patent Office [0036] FIG. 4 [0037] FIG. 5 [0038] FIG. 7 again shows a sectional side view with a further light guide arranged directly on the flat light guide in comparison to FIG. 2;
    shows the lighting arrangement according to the invention shown in FIG. 1 additionally with a reflector;
    shows a side view with respect to the flat light guide, a sectional view of the lighting arrangement according to the invention shown in FIG. 5;
    again shows a side view of a sectional view, in which, in contrast to FIG. 6, the further light guide is arranged directly on the flat light guide.
    A lighting arrangement 1 according to the invention is shown, on the one hand [0040] In FIG.
    comprises a flat light guide plate or a flat light guide 2 and on the other hand a further light guide 3.
    The flat light guide 2, as explained above, can be an already known light guide plate or an already known light guide, which is designed, for example, as a conventional optical waveguide, in which light at least in a wavelength range from approximately 400 nm to approximately 700 nm some of the inner surfaces experience a total reflection and can thus spread and mix within the flat light guide 2. In addition, in the case of such a flat light guide 2, it is then also provided that the light is coupled out or output and emitted from the flat light guide 2 via at least one flat side 6.
    The planar light guide 2 can be, for example, a thin or narrow, flat plate which is rectangular in cross section. As can also be seen from FIG. 1, the surface 6 provided for light emission is one of the large flat sides of the plate-shaped flat light guide 2. In addition, the flat light guide 2 then also has narrow sides or end faces 7, each of which has the flat sides 6 connect with each other.
    Previously, it was now provided that two corresponding light sources, in particular LEDs, are arranged on these narrow sides or end faces 7 of a flat light guide 2, the light from these light sources being coupled directly into the flat light guide 2 via the narrow sides or end faces 7 thereof , ie the narrow sides or end faces 7 are thus coupling-in surfaces of the flat light guide 2. However, inhomogeneities can arise in particular with regard to the color or color temperature and / or the brightness of the light emitted via the flat side 6, since they are directly on the narrow sides or end faces 7 arranged light sources are mostly punctiform light sources and thus the light is only selectively coupled into the narrow sides or end faces 7.
    In order to avoid these problems, at least one further light guide 3 is provided according to the invention, which is arranged on one of the narrow sides or end faces 7 of the flat light guide 2.
    Instead of arranging one or more light sources along the narrow sides or end faces 7 of the flat light guide 2, one or more light sources 4 are now arranged on at least one of the end faces 9 of the further light guide 3. The light from the light sources 4 is then coupled into the further light guide 3 via this end face 9, wherein, similar to the flat light guide 2, the further light guide 3 can be, for example, an optical waveguide, in which light at least in a wavelength range of about 400nm to about 700nm undergoes total reflection and is thus guided and distributed in the longitudinal direction along the direction of expansion of the further light guide 3 into the further light guide 3. Here, the light emitted by the light sources 4 and coupled through the end face 9 into the further light guide 3 is mixed as much as possible and distributed evenly.
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    AT 16 666 U1 2020-04-15 Austrian Patent Office [0046] The illuminants or light sources 4 can, for example, be LEDs or OLEDs.
    The flat light guide 2 and also the further light guide 3 can for example be made of glass, acrylic, polycarbonates, polyester or silicone.
    For light emission, the further light guide 3 then has structures 5 for coupling out the light, which are provided on the side 8 of the further light guide 3 facing the flat light guide 2. This means that the structures 5 for coupling out are directed in the direction of the narrow sides or end faces 7 of the flat light guide 2. In FIG. 1, each structure 5 for coupling out has a bottom surface 5b which faces the flat light guide 2. The bottom surfaces 5b then, together with corresponding flanks 5a, which form the circumferential surfaces or lateral surfaces, form the structures 5 for coupling out, the flanks 5a connecting laterally to the bottom surfaces 5b in the direction of the further light guide 3.
    The structures 5 for decoupling the light are arranged in particular on an outer surface of the further light guide 3, which corresponds to the side 8. Due to the total reflection on this surface (more precisely on the inner surface which corresponds to the surface) of the further light guide 3, light cannot exit between the structures 5 for coupling out the light, but can pass through the structures 5 for coupling out the light from the further light guide 3 be coupled out.
    The structures 5 can, as shown for example in FIG. 1, be configured in a cylinder-like manner, wherein the structures 5 for decoupling the light and the further light guide 3 can be made in one piece.
    Alternatively, it would also be possible that the structures 5 for coupling the light with the further light guide 3 are optically coupled, for example, glued to it. The further light guide 3 can then have translucent sections above each structure 5 for coupling out the light. The structures 5 for coupling out the light can be made of the same material as the further light guide 3 or can be made of a material that is transparent, for example a polymer, wherein the bottom surface 5b can be provided with a reflective layer. The structures 5 for coupling out the light can also be composed of translucent and reflecting parts.
    The structures 5 for decoupling can also be, for example, cuboid, cube-shaped or truncated cone-shaped, wherein different shapes of the structures 5 for decoupling the light can also be combined with one another.
    In the case, for example, that the bottom surfaces 5b are provided with a reflective layer, light that enters from the further light guide 3 into one of the structures 5 for coupling out the light is then coupled out, if it hits a side wall that means that a flank 5a of a structure 5 for coupling out the light strikes. On the other hand, the light that strikes the bottom surface 5 b is reflected, preferably in such a way that it is directed back into the further light guide 3. The light remaining in the further light guide 3 can emerge at a later point in time through one of the structures 5 for coupling out the light if it strikes its flank 5a. If the structures 5 are formed in one piece with the further light guide 3, the light experiences a total reflection on the bottom surfaces 5b, since this, as shown in FIG. 1, preferably parallel to the surface of the further light guide, which corresponds to the side 8 of the further light guide , are.
    The light emitted or decoupled via the structures 5 for decoupling the light is then coupled into the planar light guide 2 via the narrow sides or end faces 7 of the planar light guide 2, and then, as previously, within the planar light guide 2 further mixing and uniform The light is distributed.
    Due to the advantageous embodiment with the additional light guide 3, it is now achieved that on the narrow sides or end faces 7 of the flat light guide
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    AT 16 666 U1 2020-04-15 Austrian patent office ters 2 light is already distributed significantly better, evenly distributed and better mixed, compared to individual light sources arranged directly on the narrow sides or end faces 7. This then ensures that the light emitted by the flat light guide 2 via the flat side 6 has fewer inhomogeneities in terms of brightness and color mixing.
    In the lighting arrangement according to the invention shown in FIG. 1, it should also be mentioned that it is in particular a narrow and elongated further light guide 3, which is essentially rectangular in cross section. In addition, the further light guide 3 also extends over the entire length of the narrow side or end face 7 of the flat light guide 2, on which it is arranged.
    1 also shows that the structures 5 for decoupling the light are arranged at a distance from the narrow side or the end face 7 of the flat light guide 2, on which the further light guide 3 is arranged. This means that the further light guide 3 is also arranged at a distance. In this case, in particular, the configuration already described is provided such that the bottom surfaces 5b of the structures 5 are designed to be reflective for decoupling the light and the light is emitted or decoupled via the flanks 5a of the structures for decoupling the light. Thus, in the case of the cylindrical configuration of the structures 5 for coupling out the light, the light is coupled out via the lateral surfaces of the structures 5 for coupling out the light.
    By emitting the light only over the flanks 5a or lateral surfaces of the structures 5 for decoupling the light and also by the distance between the structures 5 for decoupling the light and the flat light guide 2 it is achieved that in the flat light guide 2nd entering light can only enter these at certain angular ranges. This also contributes to better mixing and overall more homogeneous light emission via the flat light guide 2.
    Depending on the desired result, it would also be conceivable that in FIG. 1 not the bottom surfaces 5b but the flanks 5a or none of the surfaces of the structures 5 are designed to be reflective for decoupling the light.
    2 then shows a side sectional view of the lighting arrangement according to the invention shown in FIG. 1, it also being apparent from FIG. 2 that the structures 5 for decoupling the light may, for example, be cylindrical structures 5 .
    In FIG. 3, similar to FIG. 2, a side sectional view is again shown, which differs from that in FIG. 2 in that the structures 5 for coupling out the light, which are arranged on the further light guide 3, are not designed like a cylinder but rather like a truncated cone. The corresponding inclination of the peripheral surfaces or flanks 5a of the structures 5 for coupling out the light can additionally influence the angular range into which light enters the flat light guide 2, for example in order to additionally optimize the glare reduction in a certain direction. Depending on the desired angular range, other shapes or configurations of the structures 5 for coupling out the light would also be conceivable.
    Both in FIG. 2 and in FIG. 3, as in FIG. 1, the structures 5 for decoupling the light are arranged at a distance from the flat light guide. In contrast, a lateral sectional view is shown in FIG. 4, in which the structures 5, which in this case are again cylindrical, for coupling the light directly rest against the narrow side or the front side 7 of the flat light guide 2, on which the further light guide 3 is arranged. In this case, a transition material, for example silicone, can then be provided between the structures 5 for decoupling the light and the narrow side or the front side 7 of the planar light guide, which transition material easily passes from the structures 5 for decoupling the light into the narrow side or front side 7 of the
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    AT 16 666 U1 2020-04-15 Austrian patent office flat light guide 2 enables. The transition material is then provided in particular between the bottom surface 5b of the structures 5 for decoupling the light.
    In the arrangement of the structures 5 for decoupling the light directly on the narrow side or the end face 7 of the flat light guide 2, it is then advantageously provided in particular that the bottom surfaces 5b of the structures 5 are designed to be translucent for decoupling the light, and in contrast the flanks 5a or lateral surfaces of the structures 5 are designed to be reflective for decoupling the light. However, depending on the desired use, it is also conceivable that none of the surfaces 5a and 5b are designed to be reflective, or that the bottom surfaces 5b are designed to be reflective and the flanks 5a are not.
    Furthermore, it should also be noted that the bottom surfaces 5b can also rest directly on the narrow side or the front side 7 of the flat light guide 2 without transition material, or that there is a minimal air gap between the two surfaces.
    A further lighting arrangement according to the invention is then shown in FIG. 5. This corresponds essentially to the lighting arrangement shown in FIG. 1. In addition, however, the lighting arrangement according to the invention shown in FIG. 5 then also has a reflector 10, which is designed and arranged on the further light guide 3 and the light sources 4 in such a way that the major part of the light emitted by the light source or the light sources 4, on the one hand is coupled into the further light guide 3 and, on the other hand, is coupled out via the structures 5 for coupling out the light from the further light guide 3 and then is coupled into the flat light guide 2 via the narrow side or end face 7 of the flat light guide 2.
    FIG. 6 then shows a lateral sectional illustration of the lighting arrangement shown in FIG. 5, the configuration shown there essentially corresponding to that in FIG. 2. The only difference is that here, as in FIG. 5, the reflector 10 is additionally arranged.
    7 then shows a variant in a lateral sectional view, in which the further light guide 3, in contrast to the designs in FIGS. 5 and 6, in which the structure 5 for coupling out the light is spaced apart from the flat light guide 2 are arranged, is arranged directly on the flat light guide 2, or in turn the structures 5 for decoupling the light lie directly on the narrow side or the end face 7 of the flat light guide 2, as is also already shown in FIG. 4.
    As in FIG. 6, a reflector 10 is also provided in FIG. 7, which surrounds the further light guide 3. In addition, further reflectors 11 are then provided, which, as can be seen from FIG. 7, in the area of the structures 5 for coupling out the light and more precisely laterally next to the flanks 5a of the structures 5 for coupling out the light in the vicinity or on the narrow side or end face 7 of the flat light guide 2 are arranged. As a result, a further improvement is achieved with regard to the coupling out of the light via the structures 5 for coupling out and with regard to the coupling in via the narrow side or end face 7.
    In this case, it is particularly advantageous if the bottom surfaces 5b of the structures 5 for coupling out the light are translucent and the flanks 5a are designed to be reflective. This configuration and the additional reflectors 11 can then achieve that essentially all of the light emitted by the structures 5 for coupling out is directed onto the narrow side or end face 7 of the flat light guide 2 and is thus coupled into the flat light guide 2, and on the other hand that within the flat light guide 2, light reflected back onto the narrow side or end face 7 cannot emerge from areas of the narrow side or end face 7, which are not covered by the bottom surfaces 5b of the structures 5 for coupling out the light, from the flat light guide 2.
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    AT 16 666 U1 2020-04-15 Austrian Patent Office [0070] In addition, it should also be noted that the comments made on FIGS. 1 to 4 also apply, of course, to the configurations in FIGS. 5 to 7, for example with regard to a reflective one Layer on the bottom surfaces 5b or the flanks 5a of the structures 5 for decoupling the light or the configuration of the shape of the structures 5 for decoupling the light or also with regard to FIG. 7, the comments on claim 4 regarding the immediate arrangement of the structures 5 for Decoupling the light on the narrow side or end face 7 and the possible use of a transition material.
    Furthermore, it should be noted that FIGS. 1 to 7 each show a further light guide 3, which is arranged on one of the narrow sides or end faces 7 of the flat light guide 2. However, it would also be possible for the arrangement to have a plurality of further light guides 3, at least one light source 4 being arranged on each of the further light guides 3 on one of its end faces 9. In this regard, it should also be noted that the arrangement can have a multiplicity of light sources 4, both on the end faces 9 for the case that only one further light guide 3 is provided and for the case that several further light guides 3 are provided the further light guide 3 or the plurality of light guides 3 can be arranged.
    In the event that a plurality of further light guides 3 are provided, it can then also be provided that only a part of the further light guides 3 has 9 light sources on both end faces.
    In the case of a plurality of further light guides 3, it can further be provided that 2 further light guides 3 are arranged on two opposite narrow sides or end faces 7 of the flat light guide. However, it could also be provided that further light guides 3 are arranged on three or more narrow sides or end faces 7 of the flat light guide 2.
    It would also be conceivable that instead of a further light guide 3 extending over the entire narrow side or end face 7, a plurality of further light guides are also arranged along a narrow side or end face of the planar light guide.
    With regard to the structures 5 for decoupling the light in FIGS. 1 to 7, it should also be noted that these are arranged along the side 8 in the longitudinal direction, it being possible on the one hand that the plurality of structures 5 for decoupling the light, as shown in Figures 1 and 5, have the same distance from each other. Alternatively, it would also be conceivable that the distance between the several structures for decoupling the light varies.
    This results in particular from the fact that the light sources 4 are arranged only on the end faces 9 of the further light guide 3, as a result of which there is significantly more freedom with regard to the positioning of the structures 5 for decoupling the light. This makes it possible for the distance to be selected in principle independently of the power of the light sources 4 or LEDs, in order to achieve a uniform coupling of light over the entire narrow side or end face 7 of the flat light guide 2.
    In the event that the light sources are arranged on the two opposite end faces of the further light guide, for example, a uniform distance between the structures for decoupling the light can be selected over its entire length. However, it would also be conceivable for the distance to be varied over the length of the further light guide in order to either achieve a more uniform light emission or light coupling into the flat light guide or to cause variations in the light coupling.
    权利要求:
    Claims (10)
    [1]
    Expectations
    1. Lighting arrangement (1) with at least one light source (4), in particular an LED, and a flat light guide (2) for emitting light via at least one of the flat sides (6) of the flat light guide (2), characterized in that the lighting arrangement (1 ) has at least one further light guide (3) which is arranged on one of the narrow sides or the end faces (7) of the flat light guide (2), the light source (4) on one of the end faces (9) of the further light guide (3) is arranged and on the further light guide (3) on the side facing the flat light guide (2) (8) a plurality of structures (5) are provided for decoupling the light from the further light guide (3).
    [2]
    2. Lighting arrangement according to claim 1, characterized in that the light source (4) is arranged on one of the end faces (9) of the further light guide (3) in such a way that the light from the light source (4) via the end face (9) in the further Light guide (3) is coupled in and the further light guide (3) is arranged on one of the narrow sides or the end faces (7) of the flat light guide (2) in such a way that the light coupled out via the structures (5) for coupling out via the narrow side or the end face (7) is coupled into the flat light guide (2).
    [3]
    3. Lighting arrangement according to claim 2, characterized in that the further light guide (3) is designed such that the light coupled in from the light source (4) via the end face (9) is distributed in the longitudinal direction in the further light guide (3).
    [4]
    4. Lighting arrangement according to one of the preceding claims, characterized in that the further light guide (3) is narrow and elongated and / or is substantially rectangular in cross section.
    [5]
    5. Lighting arrangement according to one of the preceding claims, characterized in that the further light guide (3) extends over the entire length of the narrow side or the end face (7) of the flat light guide (2) on which it is arranged.
    [6]
    6. Lighting arrangement according to one of the preceding claims, characterized in that the structures (5) for coupling directly against the narrow side or the end face (7) of the flat light guide (2), on which the further light guide (3) is arranged.
    [7]
    7. Lighting arrangement according to claim 6, characterized in that a transition material, for example silicone, is provided between the structures (5) for decoupling and the narrow side or the end face (7) of the flat light guide (2).
    [8]
    8. Lighting arrangement according to one of claims 1 -5, characterized in that the structures (5) for decoupling spaced from the narrow side or the end face (7) of the flat light guide (2) on which the further light guide (3) is arranged are arranged.
    [9]
    9. Lighting arrangement according to one of the preceding claims, characterized in that the structures (5) for decoupling are cylindrical, cuboid or frustoconical.
    [10]
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    10. Lighting arrangement according to one of the preceding claims, characterized in that the structures (5) are designed for coupling out in such a way that the light is coupled out via the lateral surfaces (5a) of the structures (5).
    4 sheets of drawings
    类似技术:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20070081360A1|2005-06-28|2007-04-12|Edward Bailey|Display backlight with improved light coupling and mixing|
    US20080084708A1|2006-10-04|2008-04-10|Samsung Electronics Co., Ltd.|Linear light source using point light source|
    US20100014027A1|2008-07-16|2010-01-21|Jabil Circuit, Inc.|Led backlight having edge illuminator for flat panel lcd displays|
    JPH10255532A|1997-03-11|1998-09-25|Chiaki Nishimura|Light source for illumination|
    JP3379043B2|1998-06-29|2003-02-17|ミネベア株式会社|Planar lighting device|
    US20070201234A1|2003-07-21|2007-08-30|Clemens Ottermann|Luminous element|
    JP4020397B2|2004-06-14|2007-12-12|惠次 飯村|Surface light source using point light source|
    DE102011087543A1|2011-12-01|2013-06-06|Osram Opto Semiconductors Gmbh|OPTOELECTRONIC ARRANGEMENT|
    DE102014200474A1|2014-01-14|2015-07-30|Volkswagen Aktiengesellschaft|Lighting device for a motor vehicle|DE202017101656U1|2017-03-22|2018-06-25|Zumtobel Lighting Gmbh|Flat light guide plate and luminaire|
    DE102019122470A1|2019-08-21|2021-02-25|Webasto SE|Lighting arrangement for a vehicle roof, method for producing a lighting arrangement for a vehicle roof and vehicle roof for a motor vehicle|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE202015104882.3U|DE202015104882U1|2015-09-15|2015-09-15|lighting arrangement|
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