• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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  • 引用文献
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  • 优先权
    • 专利摘要:
    Arrangement for glaring the light emission of a luminaire (100) with two planar, light-influencing elements (20, 30) arranged one above the other, wherein a first light-influencing element (20) facing a light source (110) has a first elongated lenticular structure (22) likewise facing the light source (110) ), wherein the second, the light source (110) facing away from light influencing element (30) facing away from the light source (110) second elongated lenticular structure (31) and wherein both lenticular structures (22, 31) are substantially parallel to each other.
    公开号:AT15833U1
    申请号:TGM178/2014U
    申请日:2014-04-28
    公开日:2018-07-15
    发明作者:Dipl Ing Arch Hobelsberger Georg；Dipl Ing Gassner Patrik；Ludwiczak Bogna；Escourrou Thibaut
    申请人:Zumtobel Lighting Gmbh；
    IPC主号:
    专利说明:

    description
    ARRANGEMENT FOR BLINDING THE LIGHT OUTPUT The present invention relates to an optically effective arrangement with the aid of which the light output of a luminaire is to be glare-free. In particular, the arrangement of the invention is intended to emit the light of an elongated or large-area luminaire without glare.
    The lighting of offices or workplaces is subject to certain standards. An important determination relates to the direction or the area in which the light is emitted, which should be such that, on the one hand, people are not dazzled and, on the other hand, disturbing reflections on vertical surfaces, for example on screen surfaces or the like, are avoided. These requirements are usually met by emitting the light “glare-free” or “glare-free”, which means that above a certain critical angle with respect to the vertical, the so-called luminance drops below a predetermined limit value. In contrast, emitting light at an angle that is too flat would result in glare for people who look at the lamp from below at an angle.
    This glare control of the light output can be met by various measures. Known, for example, are light-influencing elements based on reflectors in the form of grids or the like, which emit the light in a very strongly directed manner toward the underside. A disadvantage of this type of grid is, however, that it is generally not possible to achieve a closed, as uniform as possible light emission.
    In the case of larger-area luminaires, that is to say luminaires with a relatively large area over which the light is emitted, transparent light-emitting elements are therefore often used, which are structured in a special way in order to deflect the light rays passing through in a suitable manner. In particular, prism structures are known which consist of pyramid-like prisms arranged in a matrix. As an alternative to this, it is also known to provide a large-area plate with elongated prisms, in which case two prism plates of this type, which are arranged one above the other and are each rotated by 90 ° to one another, are used for glare control.
    [0005] In particular, these prismatic plates, as described above, have proven themselves many times in the past. A problem with this known solution, however, is that these plates can only be produced in certain sizes or dimensions and, in particular in the case of large-area or very long lamps, it is generally not possible to arrange the entire light-emitting surface by a single or only two superposed ones Fill in plates. Prismatic plates with prisms arranged in a matrix are typically produced, for example, using an injection molding process or an alternative special process, which, however, can only be achieved within certain sizes or dimensions. Elongated prism structures could indeed be produced more easily in different and in particular also longer lengths within the scope of an extrusion process, but then again there is little flexibility with regard to the width of such structures. However, this in turn means that in the case of elongated luminaires, the second prism structure, which is to be arranged rotated by 90 ° with respect to the first structure oriented in the longitudinal direction, must be realized from a plurality of individual parts arranged next to one another. Accordingly, this also does not lead to a complete filling of the light exit area of a lamp, which is noticeable in an optically disadvantageous light emission. The transitions between two adjacent prism elements can then be seen, which is not desirable.
    Finally, it has also been shown that when using these prism optics, which are based on a strict geometric structure, a special appearance of the / 8
    AT15 833U1 2018-07-15 Austrian patent office
    Luminaire results, which is not always rated as positive.
    The present invention is therefore based on the object to provide a novel solution for glare control of the light output in lights. The novel solution is said to be particularly suitable for providing a seamless light-emitting element even in the case of large-area or very long luminaires, which ensures the desired glare-free light emission.
    The object is achieved by an arrangement for removing glare from the light output according to claim 1. Advantageous further developments are the subject of the dependent claims.
    The solution according to the invention is based on the idea of realizing the glare control of the light output with the aid of two flat optical elements arranged one above the other. The peculiarity lies in the fact that both elements have a lenticular structure consisting of elongated structures, although in contrast to the known solution described above with two prism structures rotated by 90 ° to one another, the lenticular structures of the two elements are now aligned parallel to one another. The fact that in a first element facing the light source the lenticular structure also faces the light source, while in the second element underneath the lenticular structure from the light source is used, the effect is achieved that, despite the parallel alignment of both structures, glare control of the light output in two directions perpendicular to each other.
    According to the invention, an arrangement for glare control of the light output of a luminaire is therefore proposed, the arrangement having two flat, superimposed light influencing elements and wherein a first element facing the light source has a first elongated lenticular structure facing the light source and the second, the light source facing away element has a second elongated lenticular structure facing away from the light source and both lenticular structures run parallel to each other.
    It has surprisingly been found that despite this parallel alignment of the lenticular structures, glare control is achieved in two mutually perpendicular directions. However, since the structures now both run parallel to one another, that is to say in particular can extend in the longitudinal direction in the case of an elongated luminaire, both elements can now be produced, for example, in the course of an extrusion process or otherwise in almost any length. Furthermore, since there are in principle no significant restrictions regarding the width of the elements used, this means that both elements can each fill the light exit area of an almost arbitrarily designed luminaire in one piece. This provides a large-area, seamlessly realizable arrangement for light glare reduction, which accordingly has clear advantages in terms of appearance compared to the previously known solutions.
    A classic lenticular film, which is already known, can be used for the second element facing away from the light source with the lenticular structure facing away from the light source. Such a film can be produced inexpensively in a wide variety of dimensions. The first light influencing element facing the light source, however, is preferably formed by a material which is sold by Bayer under the name Makroion SX. This material is based on an extrusion process by which the lenticular structure is created on the upper side, i.e. on the side facing the light source. On the other hand, there is a so-called scatter fine structure in a random look. It has been shown that, in particular, the combination of this macroion SX material with an underlying classic lenticular film leads to very good properties with regard to the glare control of the light emission. At the same time, a very homogeneous, that is, uniform brightness over the entire surface of the luminaire is achieved, which is additionally supported by the fact that the arrangement seamlessly fills the entire light exit surface.
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    Patent Office Usually, both elements lie on top of one another, in which case, to avoid a so-called Moire effect, it is preferably provided that the Ipi number of the lenticular film is identical to that of the macro ion or a multiple thereof.
    The arrangement of the anti-glare structure according to the invention can be done, for example, in that the sandwich structure is placed on a clear, flat light-emitting element of the light, for example on a completely flat plate. As an alternative to this, however, the second element facing away from the lamp could also have a supporting function. In this case, it is advantageous if, instead of the lenticular film, a flat element with a certain intrinsic stability is used, which, however, still has the elongated lenticular structure.
    The invention will be explained in more detail with reference to the accompanying drawing. Show it:
    Figure 1 is a perspective view of an elongated lamp in which the inventive arrangement for glare control should be used;
    Figure 2 is a sectional view of the lamp of Figure 1;
    Figure 3 is an enlarged view of a section through the anti-glare arrangement according to the invention and Figure 4 is a schematic representation of the operation of the arrangement according to the invention.
    As an application example for the present invention, an elongated luminaire, generally provided with the reference number 100, is shown in FIG. This luminaire 100 can be used both as a built-in luminaire and as a surface-mounted luminaire or as a suspended luminaire and has an elongated housing 101 with a light exit opening 102 formed on the underside for the light emission. As can be seen from the sectional illustration in FIG. 2, the light sources 110 are arranged in the interior of the housing 101 which is U-shaped in cross section, it being assumed in the present case that LEDs 110 arranged one behind the other in the longitudinal direction are used here. These LEDs are supplied by one or more operating devices 115 arranged in the interior of the housing 101.
    [0021] The light emitted by the light sources 110 is to be emitted glare-free by the lamp 100. This means that - as shown schematically in FIG. 2 - light rays which leave the light exit disk 105 of the lamp 100 should assume or should not exceed certain angles α with respect to the vertical I. Ideally, the so-called luminance should occur above a predetermined limit angle below a certain limit. This means that at larger angles α, the proportion of light rays emitted laterally decreases significantly and, ideally, no more light is emitted above a certain critical angle. People who look at the light exit surface of the lamp 100 at such flat angles are then no longer dazzled.
    The schematic representation of Figure 2 illustrates a glare control of the light transversely to the longitudinal direction of the lamp 100. Ideally, however, glare control should also take place in a direction perpendicular thereto, that is to say in the longitudinal direction of the lamp 100. Only if shielding is provided with respect to both directions is it actually ensured that the requirements for efficient, glare-free lighting of workplaces are met.
    With the help of the solution according to the invention, the glare control of the light is now achieved by a relatively simple to implement arrangement, which has the particular advantage that it can be produced in almost any dimensions and, despite everything, seamlessly fills the light exit surface of a lamp. In the exemplary embodiment shown, this means that, despite the relatively long length of the luminaire 100, the glare-free structure is not composed by a plurality of elements arranged one behind the other
    AT15 833U1 2018-07-15 Austrian patent office must be broken down, which leads to a significantly better appearance.
    In the illustrated embodiment, the anti-glare structure 10 according to the invention consists of two planar light influencing elements, which in the present case rest on the clear light exit disk 105, which does not influence the light output of the lamp 100. In this case, the pane 105 thus forms a carrier for the actual anti-glare structure. As already mentioned, this structure 10 consists of the two planar elements arranged one above the other, the design of which can be seen in more detail from the enlarged illustration in FIG.
    As already mentioned, a special feature of the solution according to the invention is that both planar elements 20 and 30 of the glare control structure 10 each have an elongated lenticular structure, the lenticular structures being aligned parallel to one another. As explained in more detail below, despite the parallel alignment, there is surprisingly the effect that the desired glare reduction is achieved in both mutually perpendicular directions.
    The upper, the light sources 110 facing element 20 is preferably formed by the material macro ion from Bayer. According to the illustration in FIG. 3, it consists of a flat core 21 which, on its side facing the light sources 110, has a first lenticular structure 22 consisting of elongated grooves or highlights running parallel to one another. The opposite side of the core 21 is provided with a so-called scatter fine structure 23, which has a random optic, that is to say has a non-regular structure. This structure 23 ensures a more uniform appearance of the light output in such a way that the light exit surface 102 of the luminaire 100 appears as evenly bright as possible when the light sources 110 are activated. This structure 23, however, plays a subordinate role for glare control.
    The preferred material macro ion consists of polycarbonate and was specifically developed to influence the light output from LED light sources. However, it has been shown that the desired glare reduction is achieved in two directions perpendicular to one another only in cooperation with the second lenticular film described below, although both lenticular structures 22, 31 are aligned parallel to one another.
    The second optical element 30 is thus, as already mentioned, formed by a classic lenticular film, which on its underside has a corresponding lenticular structure 31, in turn, from elevations or grooves running in the longitudinal direction. However, this second lenticular structure 31 now faces away from the light sources 110. The elevations can have different prism-like shapes. For example, triangular, spherical or trapezoidal elevations would be conceivable on average.
    [0029] The lenticular film also usually consists of polycarbonate. Since both elements 20, 30 lie on top of one another, there is in principle the possibility that so-called moire patterns are created. However, these could possibly be avoided if the Ipi number of the lenticular sheet is identical to that of the macroion or a multiple thereof. This Ipi number provides information about the density of the structures (Ipi: lines per inch), so that it should be the same size for both elements or the density of the structures of the lenticular film should be an integral multiple of the density of the macroion.
    The interaction of the two elements 20 and 30 to the desired posting is shown schematically in Figure 4, which the light distribution immediately after delivery by the LED (Figure 4a) and after passing through the first element 20 (Figure 4b) and finally through the second element 30 (Figure 4c) shows. For the sake of simplicity, the schematic representation first assumes that the LED emits the light essentially uniformly in all directions, so that there is an essentially circular light distribution. The first lenticular structure 22 facing the light source now initially results in a quasi distortion of the light distribution, in such a way that the light emission is initially widened in the transverse direction X. The light distribution curve is now approximately
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    AT15 833U1 2018-07-15 Austrian patent office elliptical, so it initially shows even greater scatter in the transverse direction X. However, the distortion also has a compression or shielding in the longitudinal direction Y
    Episode.
    This means that the shorter semi-axis of the ellipse in Figure 4b is smaller than the diameter of the circular light distribution curve in Figure 4a.
    The second lenticular structure 31 facing away from the light source in turn brings about compression in the transverse direction X, but the light emission in the longitudinal direction Y is almost no longer influenced. Ultimately, this again results in a circular light distribution as it was originally present, but now the diameter of the circle in FIG. 4c is smaller than in the original circle according to FIG. 4a, which means nothing else that ultimately the light emission in the two mutually perpendicular directions X, Y compressed, that is, glare-free. Of course, this is a simplified explanation of the mode of operation of the arrangement according to the invention, but it has been shown that this can actually achieve the desired glare reduction.
    The arrangement 10 according to the invention thus actually leads to the desired glare reduction. However, since the two lenticular structures now run parallel to one another and in particular both can also run in the longitudinal direction of the lamp, it is possible to use both elements 20 and 30 e.g. to produce in the extrusion process. This in turn means that the elements 20, 30 can be realized in one piece in almost any length, and thus an arrangement is created even with extremely long luminaire housings, which completely fills the entire light exit surface. The same advantage is also achieved with large area luminaires, since the two materials, on the one hand the macro ion and on the other hand the lenticular film, can easily be produced in a very large width.
    Overall, an arrangement is thus created by the present invention, which, as desired, ensures glare control of the emitted light. In comparison to known solutions, however, the arrangement according to the invention can be implemented very easily and can be produced inexpensively in almost any dimensions and configurations. As a result, not only the light emission but overall the appearance of the lamp is significantly improved.
    It should also be noted that, as an alternative to the illustrated embodiment, in which the two elements rest on the clear plate, it would also be conceivable that the arrangement is self-supporting. In this case, at least one of the elements - ideally the lower element - should be designed to be load-bearing, that is to say with sufficient stability, so that the arrangement can then be arranged in the light exit area of a luminaire housing.
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    权利要求:
    Claims (11)
    [1]
    Expectations
    1. Arrangement for glare-free light emission from a luminaire (100) with two planar light influencing elements (20, 30) arranged one above the other, a first light influencing element (20) facing a light source (110) also having a first elongated lenticular structure facing the light source (110) (22), the second light influencing element (30) facing away from the light source (110) having a second elongated lenticular structure (31) facing away from the light source (110), and wherein both lenticular structures (22, 31) run essentially parallel to one another.
    [2]
    2. Arrangement for glare control of the light output according to claim 1, characterized in that the lenticular structures (22, 31) are each formed by grooves or elevations running parallel to one another.
    [3]
    3. Arrangement for glare control of the light output according to claim 1 or 2, characterized in that the first light influencing element (20) consists of the material macro ion.
    [4]
    4. Arrangement for glare control of the light output according to one of the preceding claims, characterized in that the second light influencing element (30) is formed by a lenticular film.
    [5]
    5. Arrangement for glare control of the light output according to one of the preceding claims, characterized in that at least one of the light influencing element (20, 30), preferably both, consists of polycarbonate.
    [6]
    6. Arrangement for glare control of the light output according to one of the preceding claims, characterized in that the two light influencing elements (20, 30) rest directly on one another.
    [7]
    7. Arrangement for glare control of the light output according to claim 6, characterized in that the Ipi number of the second lenticular structure (31) with that of the first lenticular structure (22) is identical or a multiple thereof.
    [8]
    8. Arrangement for glare control of the light output according to one of the preceding claims, characterized in that the second light influencing element (30) has an inherent stability.
    [9]
    9. Arrangement for glare control of the light output according to one of claims 1 to 7, characterized in that it has a flat carrier element (105) on which the two light influencing elements (30) rest.
    [10]
    10. Arrangement for glare control of the light output according to claim 9, characterized in that the carrier element (105) is the light exit disk of a lamp.
    [11]
    11. Luminaire (100) with lamps (110) and an arrangement for glare control of the light output according to one of the preceding claims.
    Two sheets of drawings
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