• 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:
    It is presented optics for concentrated light emission, which can be used as a full-color pixel in grid arrangement mainly in variable message signs and electronic scoreboards outdoors. The light source (1) is, inter alia, a commercially available FullColor LED in SMD design, each with a red, green and blue LED crystal. Immediately before it is approximately the same size entrance surface (3) of a light guide rod (2) with a constant cross section, which has a lateral surface of sharp edges adjacent to each other. It captures the light largely completely and causes very efficient without the aid of scattering a complete mixing of different colors and brightnesses. The light exit (4) of the light guide rod (2) lies in the focus of a converging lens (5), which focuses the exiting light. Conveying lens (5) and light guide rod (2) may be integrally assembled. The light emerging from the light guide rod can be further adjusted in its distribution by optically active surfaces or scattering structures which are superimposed on the condenser lens.
    公开号:AT510824A1
    申请号:T1951/2010
    申请日:2010-11-23
    公开日:2012-06-15
    发明作者:
    申请人:Swarco Futurit Verkehrssignalsysteme Ges M B H；
    IPC主号:
    专利说明:

    P43843
    Farbmisehende collection optics
    Heretofore, for outdoor display panels which are required to display variable contents, such as the so-called traffic change displays for traffic control, luminous points including a light source, in particular an LED, have been used. By electronically controlling the LEDs, luminous points can be switched on and off as well as representing gradual brightness differences. These luminous dots are arranged in different light colors either by symbols to be displayed, such as traffic signs, or used over larger areas in a grid arrangement in order to be able to display arbitrarily programmable graphics, texts or images. Here the luminous dots act as so-called pixels. i *:
    Unlike LED-based large-area video screens, which require broad coverage for an audience in front of them, traffic images are limited to much narrower viewing angles because they often only need to be viewed from one lane at a distance. In addition, they usually show constant displays and still pictures, which change only rarely. This results in considerable simplifications in the control electronics and energy consumption, and thus much lower purchase and operating costs. However, larger Sichtentfemungen and weather conditions require higher light levels, there are also certain lighting requirements vorrieberi. While previously monochrome luminous dots are usually sufficient, and the few image representations, for example, from a combination of one red, green and blue light point, summarized as a color pixel, executed in raster arrangement, is expected in the future that more and more color representations in ever higher resolution would be desired and a pixel arrangement of three monochrome luminous points would be too large and too expensive.
    Compared to this, LED large-screen video screens use specially manufactured LEDs that contain the three primary colors red, green and blue in the form of three LED crystals in a common housing, whereby each color can be individually controlled. The three colors have an identical emission characteristic which is achieved, for example, by addition of the scattering agent into the LED. These so-called full-color or multi-LED have a flat light exit surface and are arranged in the pixel grid. They emit their light as so-called cosine emitters, with the light being strongest in the center and gradually decreasing to zero at the edge at 90 ° according to the function of a cosine curve. Because the light radiates hemispherically in a very large area, the brightness is also rather low in the center and due to the increasing energy and cooling effort not steigerbar, which is why such screens are used only indoors. In the outdoor area, large-screen video screens are also equipped with special, individual red, green and blue LEDs with integrated, light-bundling lenticular and oval design and light emission because the required daylight brightness can not otherwise be achieved economically.
    For all LED large screens, it is particularly important to make the light emission of the LED as identical as possible, since otherwise when viewed from the side color shifts, color fringes or color spots appear. It is very complicated to install individual single-color LED with lens dome so that they are all precisely aligned with each other, especially when the LEDs are still on wire feet.
    The FullColor or Multi-LED are simply soldered as a SMD design in a grid on a suitable PCB, which also gives an accurate level alignment, the light emission of the three LED crystals is already similar.
    It is now obvious to use the simple and cost-effective design of a FullColor or MultiLED also for high light outputs by simply bundling the broadly radiating light through a superior condenser lens. However, this project fails because the light of the three color crystals can not be bundled identically to each other by the superior lens, but targets each color in a different direction, according to the arrangement of the crystals in the LED and the optical laws of imaging. The colors must therefore be well mixed before bundling.
    There are already suggestions for the color mixing of different LEDs. In JP 2008 047482 A (Epson) a display illumination is presented by edge irradiation with differently colored LED, polarization filter and color mixing. Here, the task is fundamentally different, the color mixture without bundling the light already arises in the multi-LED itself.
    Even in the known billboards with edge illumination by LEDs in different colors automatically creates a very good color mixing without bundling, by the light of each LED is distributed over the entire display area through multiple reflection and scattering.
    Even room luminaires with red, green and blue LEDs produce a uniformly mixed white, as long as they use LEDs with the same emission characteristics and further homogenize them with additional scattering with structured cover plates, resulting in a uniform lighting effect and color.
    A color mixture without light bundling can thus be done simply by light scattering. It should also be mentioned status indicators on electronic devices, where LEDs are used with several crystals, which have about red and green and yellow as the mixed color. The light of this LED is guided by means of optical fibers to the housing surface and emitted there wide-scattering. Scattering basically also means an energy loss of the light, which manifests itself in reduced bundling ability, as well as losses due to light, which by scattering leaves the optical system prematurely and can not be used.
    But it is already known an arrangement for bundled mixed light. In US 2010 020565 Al (Seward) proposes to completely mix the differently colored light of the LEDs in a small (Ulbricht'schen) ball and pass through a fiber optic rod in a high-bunching collection optics. In practice, the proposal fails because of the high stray light losses on the walls of the ball, as well as the required size and the cost of this arrangement.
    The object of the invention is to build an optical system which completely mixes the light of the different LED crystals of such a FullColor or multi-LED with one another such that its intensity and direction are maintained in a small space and can then be bundled in a known manner Without forming for the viewer color differences, color fringes or color spots, the arrangement must be inexpensive and small.
    This is done in erfmdungsgemäßer manner by a special light guide rod is used, the light entrance surface of the light guide rod in front of the light exit surface of the light source is arranged and captures light of each crystal, the light guide rod extends perpendicular to its entrance surface, its cross section is constant or gradually increases and the
    Light emission of the optical fiber rod is in the range of the focus of the superior converging lens. For the formulation "in the area of focus" it is noted that, technically, the light exit surface coincides as far as possible with the focus or lies in the area directly surrounding the focus. Furthermore, according to the invention, the length of the optical fiber rod is a multiple of the diameter of the entry surface.
    The light emerging from the LED light source enters immediately into the entrance surface at the end face of the light guide rod. Its angular range is thereby reduced by +/- 90 ° (hemisphere) by the refraction of light as a function of the refractive index of the optical fiber material to an angle of, for example, +/- 42 ° to the axis when using Plexiglas. This angle is calculated as known as the arc sine of the reciprocal of the refractive index. The optical fiber rod can be made of any suitable transparent plastics or glasses.
    At a constant cross section of the light guide rod, the light then strikes the walls at a maximum of 42 °, which is why it is totally reflected, because a passage through the side faces is only possible from about 48 ° to the axis. It thus passes in a known manner by multiple lossless total reflection on the walls of the optical fiber rod to the light exit, which may well be the same size as the entrance surface, and is thereby mixed by the geometric design of the optical fiber rod. Without further action, the light would fanned out again at +/- 90 ° at the exit. The light emission can therefore be viewed as the LED exit surface, but with mixed light and focused by a converging lens in a known manner. The mixing takes place essentially without light losses.
    The mixing is a consequence of the jacket design and length of the fiber optic rod. Because of the large number of possible cross-sections, the description of the mode of action is limited to a few simple assumptions, but this does not limit the scope of protection.
    Basically, each optical fiber mixes the incoming light evenly over the light exit after covering a certain path. Cause are in addition to the geometric design, especially small geometric deviations of the surfaces, surface roughness, inclusions in the material or a curvature of the optical fiber rod, which influence the reflection angle and thus contribute to the mixing of the light. However, these scatters also cause losses if the reflection angles are changed so much that light is no longer totally reflected and is lost due to lateral leakage. And the longer the light guide, the more light is lost through absorption in the material.
    In the application according to the invention, the length of the optical fiber rod is expediently kept as short as necessary. Blending is accomplished solely by fiber optic geometry, deviations in geometry or material to improve blending mixing reduce efficiency and are neither desirable nor necessary. In addition, the optical fiber rod uniformly distributes the light of each crystal within the same optical fiber length over the light emission, regardless of whether a crystal is positioned centrally or in the edge region of the entrance surface.
    The invention will now be explained with reference to the drawing. FIG. 3 shows a section through an arrangement according to the invention including the beam path, FIGS. 4 and 5 show optics according to the invention in an illustrative representation.
    Assuming first a light guide rod with a constant, rectangular cross-section in front of a light source with approximately the same light emission, as shown in Fig. 3, one can describe its effect with reference to FIG. 1 as follows:
    If one mentally looks from directly inside the light exit 4 of the light guide rod 2 against the light source 1, the light guide rod 2 appears because of the total reflection on the sides as a rectangular tube of plane mirrors. The visible through the light entrance surface 3 light source 1 is reflected not only on all four side walls, but it is formed by multiple reflection of parallel mirror surfaces a rectangular pattern of mirror images la, lb, lc ... the same light source 1. It is an effect comparable to a view into a so-called kaleidoscope. The light source 1 here has three crystals, R, G, B of different colors, in particular red, green and blue, whose mirror images Ra, Rb, Rc, ... Ga, Gb, Gc Ba, Bb, Bc ... are also located. If the fiber optic rod 2 has a sharp-edged design, the view of all mirror images is possible without hindrance. In the case of larger edge radii, some mirror images would be covered by the radius, or reflections would occur at the radii themselves, which would impair the representation. -6- «» · «« * «Λ ·
    If the LED crystal R, G, B is not in the middle of the entrance surface 3, some mirror images are closer together, others farther apart, but on average nothing essential changes, because each mirror image naturally remains within its mirrored rectangular entrance surface. The field of the mirror images is limited by the material-dependent critical angle of total reflection, with about 42 ° for Plexiglas, further adopted outside LED mirror images can no longer radiate light to the light and therefore are non-existent. The longer the light guide bar 2, the farther the viewer is, the larger the visible field of mirror images, the lower the viewing angle differences between the mirror images and the greater the uniformity overall. The limitation of the visibility by the critical angle of total reflection therefore requires such a length of the optical fiber rod 2, that for the desired uniformity of mixing sufficiently many mirror images are in the field of view. The graphic representation can serve here as an indication, it can be seen in one direction 7, in the other direction 9 mirror images including the original. Including the critical angle of about 42 °, it can be assumed that a light guide rod 2, which is 8 to 10 times longer than its entrance surface 3 is large, provides very good mixing results. When using commercially available FullColor LED for large-screen video displays, these are only about 20 mm of fiber optic length,
    Each mirror image radiates as well as the original a full bundle of light rays within the angular range up to about 42 °, therefore, also to every point of the light emission. The light bundles differ only in their intensity and often their color depending on their emission direction. In the presence of a sufficient number of mirror images thus results in an extremely uniform illumination of the light output by the sum of the light beams of each color and from each direction of a mirror image and the directional brightness of the LED crystals, even the position differences of the LED crystals within the light source, because a mirror image is closer on average, the next one is farther away, which almost completely fights for the overall effect. Over a longer length of optical fiber rod, the quality of mixing can be further improved because of the increase in the number of mirror images.
    Figure 1 also shows that not only does the overall view of the mirror images give the impression of even distribution, but also each color is relatively evenly and regularly distributed within the overall view, as illustrated by the three views separated by R, G, and B. Immediately before the exit of the light from the light guide rod 2, therefore, a uniformly bright distribution of the light in mixed color prevails within the limit angle of about 42 °.
    The view from within the light exit 4 onto the field of the mirror images is actually the sum of the views in all possible directions on one and the same light source 1, whereby an average overall impression of color and brightness is established, which means a physical mixing of all the light rays, for example by scattering is equal.
    All light rays that have entered the light guide rod emerge again from the same amount of light emission at the same angle. Thus, apart from the physically unavoidable interfacial and light conduction losses in the material, the color and brightness mixture is lossless, and the efficiency of subsequent bundling is therefore substantially unchanged.
    It is obvious that such fields arise on mirror images with geometric shapes of the optical fiber rod, which can fill a plane completely and evenly, ie equilateral triangle, rectangle and square, and regular hexagon, as shown in Fig. 2. These optical fiber cross-sections each produce a gap-free and non-overlapping surface of mirror images with a regular grid arrangement, provided that the mirror surfaces adjoin one another with sharp edges. The mixing of the colors and brightnesses arises here as described above neither by mixing processes nor by scattering effect, but by a virtual regular arrangement of identical light sources as mirror images of the same light source, which send their light to the light emission. The focusability is also maintained to the full extent, because the inlet and outlet cross-section of the optical fiber rod can be the same size. And because the effect of the crystal position largely balances on average, the dependence of the mixing result on it is extremely low.
    The uniform mixing alone is not the only criterion for the optical design, because it must also be taken into account the direction of emission of the light rays after the light emission. In the case of a regular arrangement of discrete mirror images of the LED crystals, the light rays also emerge in the corresponding discrete directions, thus, in contrast to the exit from the light source, they no longer represent a homogeneously divergent light bundle. Without superior optics, the emitted light would become a pattern generate bright points of light, because each mirror image of the LED generates its own light beam through the light emission in the respective direction of emission. This
    Effect is a consequence of the present blending method. In the case of a thorough mixing of all the light rays, the light bundle would be just as homogeneous as when emerging from the light source itself.
    FIG. 3 shows this circumstance in a simplified form for the light of an LED crystal R in that, for reasons of clarity, only axis light beams r, ra, rb, rc... Are shown, in each case representative of a narrow light beam. The light emitted by the light exit 4 of the mirror images forms a sheaf of narrow individual bundles. This is shown for the center F of the light exit, as well as for an arbitrarily laterally located point P of the light exit, for which the direction of emission of the narrow light beam changes only slightly.
    If, after the light guide rod 2, a converging lens 5 is positioned so that the light exit 4 is exactly in its focus F, the divergent light bundles present at each point P of the light exit 4 will pass through the convergent lens into the direction p corresponding to this point P by the so-called Main point H of the condenser lens 5 bundled. The passing through the center of the light exit F beam of light are aligned axially parallel, the bundles of laterally lying points of the light exit are collimated in the associated directions p. The light exit 4 is therefore projected into the infinite according to the laws of optics, with each point P of the light exit 4 imaging in a direction p determined according to the optical laws, irrespective of which direction the individual light beams exiting from this point have. The light distribution of this optical arrangement is thus a uniformly bright, same-colored, upside-down area in the shape of the light exit 4.
    This light distribution can be further adapted to the requirements by optically effective geometries or scattering structures in the area of the converging lens 5. It is obvious that the light output should already have a favorable shape for the desired further light distribution and scattering. For example, the distribution can be scattered by ribs or nubs 7 on the exit surface 6 of the condenser lens 5 in width. The initially uniform brightness is thus modified and widened with respect to a desired brightness distribution, without affecting the mixed color.
    In a further embodiment of the invention, the optical fiber rod 2 can also expand conically. As is known, this causes the light in the optical fiber rod to be focused by the inclination of each ray of light toward the axis at each total reflection on the wall about the wall. [• «· · · & & & &. Is reduced twice the value of the cone angle prevailing there. In the case of a rectangular cross-section, bundling can take place in a horizontal, vertical or all-round direction. The light exit 4 thus increases correspondingly with respect to the entrance surface 3. Looking through it into the light guide rod 2, the grid-like arrangement of the mirror images curves in one or both directions away from the viewer. The reduction of the light beam angle leads to a reduction in the number of effective mirror images, which can be compensated with an adequate extension of the optical fiber rod 2. The mixing itself works the same as before. The enlargement of the light exit 4 has an aliquot reduction of the luminance, but a higher output bundling of the light result.
    The outlined versions of fiber optic cross-sections have the same functional principle. However, it is also possible to use any other cross sections, even with curved boundary surfaces. The individual mirror images then turn into distorted figures, often no longer recognizable as mirror images, the mixture can only be seen as an integral over differential mirror images, there are overlaps or gaps in the mirror images. The mixing is therefore usually much worse and completely unclear in the operation. The necessary length of such a fiber optic rod is then determined only by simulation or experiment.
    A very poor mixing has a circular cross-section, since a light beam that passes through the center, after each reflection again only through the center and a light beam that passes the center, is always reflected only in a circle around. An improvement is then dependent on the additional scattering effect by tolerances of the geometry, surface roughness, discontinuities in the material or a curvature of the optical fiber rod. It is therefore recommended, wherever possible, to choose polygons with cross-section according to the invention in order not to be dependent on the lossy scattering effects. In such and other, non-circular cross-sections is to set as the radius of the equivalent radius. This equivalence radius is the radius that has a circle with the same cross-sectional area as the considered cross-section.
    In a further embodiment of the invention, the light exit 4 can be present only virtually, the converging lens 5 connects directly and in one piece to the light guide rod 2. Thus, the light does not have to leave the light guide and re-enter the condenser lens, but it can become light.
    continue to run without loss of interface until it emerges from the convergent lens. This construction is very compact and efficient.
    Another embodiment relates to the use of optically effective geometries in the field of the converging lens. If, for example, the exit face of the converging lens is superimposed with a structure, then the photograph is modified or scattered by this structure. However, it is also possible to divert a portion of the light into other, otherwise dark zones between the virtual light exit and the exit surface of the condenser lens, for example by means of totally reflecting surfaces. The geometry of the optical fiber cross-section to be selected so that exactly the desired light distribution is achieved together with simple light-directing measures, in particular by means of computer simulation can be solved.
    4 shows an optical system with the cited embodiments in front of a FullColor LED light source 1. The optical fiber rod 2 widens conically in the horizontal direction, vertically it is kept constant. The position of the light exit 4 is determined by the lower and upper end of the light guide rod 2. The light exit 4 is only virtually present, because the material extends further to the exit tip 6 of the converging lens 5, the focus is in the virtual light exit 4. Subsequent to the light guide rod 2, an inclined surface 8 is attached to the upper side, which generates a mirror image of the virtual light exit immediately above adjacent, also the side surfaces 8a of the optical fiber rod are continued, and they also produce an adjacent mirror image of the virtual light emission. The projection of the light exit 4 on the converging lens 5 to infinity reverses the directions, it therefore has laterally and below the projected rectangle on further light surfaces 9, 9a, which arise by reflection of the exit at the surfaces 8 and 8a, which is why in sum here a substantially triangular light distribution arises. The mirrored surfaces 9, 9a are only partially present and also have a brightness gradient, because only part of the light rays from the light exit 4 can reach the reflection surfaces 8, 8a by the angle limitation to approximately 42 °. A great advantage of these adjacent mirror surfaces is the seamless transition in the light distribution between the image of the light exit and the mirrored surfaces 9, 9a. The dome 6 of the condenser lens 5 may be superimposed with a scattering structure 7, which causes a total of a slight scattering effect and thus not only a homogenization of the light distribution, but also generates a profile at the edges of the light distribution. • · · »-11 -
    The selection of the most suitable cross-section and the arrangement of the LED crystals in the light source itself is a question of the framework conditions and the required light distribution, as well as the design of the optics.
    A freely defined cross-section may have its justification especially in its exit geometry, where together with the converging lens 5 a special light distribution is required. For example, it is possible, as shown in FIG. 5, to choose a cross or arrow shape or any other symbol for the optical waveguide cross section, which is then projected onto a screen or into the infinite by the converging lens 5, with uniform brightness and arbitrarily changeable uniform color. Compared to a solution with a mask, the direct generation of the luminous symbol is lossless and correspondingly bright.
    If the optical fiber cross-section is designed as desired, it must also be examined whether the mixing of the LED crystals in the center takes place differently than in the peripheral regions. If necessary, a longer optical fiber rod 2 must be provided.
    Instead of the FullColor or Multi-LED, individual small LEDs, for example so-called chip LEDs, can be provided in a tight arrangement. Any individual colors can be combined here. It is also possible to use the same colors to increase the overall brightness, but also to build a redundant light source with multiple crystals, for example for security tasks. In case of failure of one LED or switching to the other, no change in the light distribution or appearance can be seen. However, if necessary, the color could be changed at will.
    Of course, the light source of the optics can also be equipped with only one LED crystal. As a result, the same distribution of light is produced for a single color at a lower cost, because often have full-color display panels adjacent monochrome areas, such as additional text.
    With white LED is often criticized that in the center bluish light from the blue LED crystal, against the edge but yellowish light is emitted from the conversion mass. The optics according to the invention completely also mixes these color differences caused by the LED construction, because the inhomogeneously luminous surface of the white LED can always be regarded as an overall arrangement of several LED crystals with different colors and brightnesses.
    The presented invention can of course be used in any other applications, for example, optics can be used in a dense arrangement as a stage headlights with color changer, or as a spotlight in the field of general or effect lighting, but also as flashlights or signal lights. The optics can also be scaled to any size so that powerful LEDs can be used which are also available with several LED crystals in a common housing or in chip-on-board design with a flat exit area.
    权利要求:
    Claims (19)
    [1]
    1. Color and light-mixing collection optics, in particular as a full-color pixel for outdoor display panels, for spotlights or signaling, consisting of an LED light source, as well as a front arranged light guide rod and a condenser lens, characterized in that the LED light source (1) contains a plurality of LED crystals (R, G, B), the light entry surface (3) of the optical fiber rod (2) is arranged in front of the light exit surface of the LED light source (1) and captures light of each LED crystal the Lichtlei terstab (2) perpendicular to the entry surface (3) and that its cross section is constant or gradually increases, and that the light exit (4) of the optical fiber rod (2) in the region of the focus (F) of the convergent lens (5) located.
    [2]
    2. collecting optics according to claim 1, characterized in that the light guide rod (2) has a length which is a multiple of the diameter of the entrance surface (3).
    [3]
    3. collecting optics according to claim 1, characterized in that the LED crystals emit different colors.
    [4]
    4. collecting optics according to claim 1, characterized in that the light source (1) is a FullColor- or multi-LED with a number of crystals and / or colors in a common housing.
    [5]
    5. collecting optics according to claim 4, characterized in that the light source (1) is a FullColor or multi-LED with three crystals in the primary colors red, green and blue.
    [6]
    6. collecting optics according to claim 1, characterized in that the light source (1) consists of several LED with individual crystals and the same direction of radiation in a tight arrangement.
    [7]
    7. collecting optics according to claim 1, characterized in that the light source (1) of a plurality of crystals is constructed on a common printed circuit board in chip-on-board technology.
    [8]
    8. collecting optics according to claim 1, characterized in that the LED crystals are operated at electrically separate power sources and continues to light in case of failure of a circle of the other or next LED crystal and thereby a failure safety or a color change in the radiation is achieved.
    [9]
    9. collection optics according to one of claims 1 to 8, characterized in that the light exit surfaces of the LED directly adjacent to the inlet surface (3) of the optical fiber rod (2).
    [10]
    10. collecting optics according to one of claims 1 to 9, characterized in that the lateral surface of the optical fiber rod (2) is formed of planes which adjoin each other sharp-edged and thus each cross-section has the shape of a polygon.
    [11]
    11. collecting optics according to claim 10, characterized in that the light guide cross-section is an equilateral triangle or regular hexagon, square or rectangle.
    [12]
    12. collecting optics according to claim 10 or 11, characterized in that the cross section of the optical fiber rod (2) remains constant over its length or gradually expanded.
    [13]
    13. collection optics according to one of claims 1 to 12, characterized in that the optical fiber rod (2) is polished on all its surfaces optically smooth high gloss and its material is free of light-scattering components.
    [14]
    14. collecting optics according to one of claims 10 to 13, characterized in that the light outlet (4) of the optical fiber rod (2) in its outline already largely corresponds to the upside-down required light distribution and the transmitted light through the upstream condenser lens (5) the optical projection law is emitted in the form of the upright outline.
    [15]
    15. collecting optics according to one of claims 12 to 14, characterized in that the light guide cross section has the shape of an arrow, cross or a similar symbol.
    [16]
    16. collecting optics according to one of claims 1 to 15, characterized in that the collecting lens optical structures are strung, by which the light distribution is changed or scattered.
    [17]
    17. collecting optics according to claim 16, characterized in that the optical structures (7) of the outer surface (6) of the converging lens (5) are superimposed.
    [18]
    18. collecting optics according to at least one of claims 1 to 17, characterized in that the light exit (4) of the optical fiber rod (2) only exists virtually and the optical fiber rod (2) passes directly into the converging lens (5).
    [19]
    19. collecting optics according to at least one of claims 1 to 18, characterized in that in extension of the light guide (2) optically effective surfaces (8, 8a) or surface structures (7) adjoin the soft light bundle by refraction or total reflection, deflect or sprinkle. 20. color and light mixing collection optics according to claim 1, characterized in that the light source (1) by using conversion material has a luminous surface with locally different color and brightness, the gapless arrangement of LED crystals of different color and brightness represents and collection optics Color and brightness fluctuations compensates.
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    法律状态:
    2021-08-15| PTA| After opposition partly revoked|Effective date: 20210616 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1951/2010A|AT510824B1|2010-11-23|2010-11-23|COLOR MIXED COLLECTION|ATA1951/2010A| AT510824B1|2010-11-23|2010-11-23|COLOR MIXED COLLECTION|
    BR112013012109-2A| BR112013012109B1|2010-11-23|2011-11-17|CONVERGING OPTICS MIXING COLORS AND LIGHT|
    RU2013128472/28A| RU2592720C2|2010-11-23|2011-11-17|Colour mixing collecting optical system|
    US13/989,356| US9268078B2|2010-11-23|2011-11-17|Color-mixing convergent optical system|
    EP11810779.6A| EP2643717B1|2010-11-23|2011-11-17|Color-mixing convergent optical system|
    PCT/AT2011/000468| WO2012068603A1|2010-11-23|2011-11-17|Color-mixing convergent optical system|
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