AT16685U1 - Direct beam LED light with anti-glare optics - Google Patents

Abstract

The invention relates to a directly radiating lamp with one or more LEDs (4) as light sources, with the LED (s) or part of the LED (4) being assigned a first light directing device which detects the LED (4 ) emitted light is limited by directional reflection to a certain area of the room, and the first light directing device is followed by a second light directing device in the beam path of the light emitted by the or the associated LED (4), which has a translucent body (10) that at least a part of the Deflects light by total reflection of the light running in it and / or refraction, the light of the LED (4) being directed into the room by the first and second light directing devices in such a way that glare control is provided in a shielding area which adjoins the main beam area of the lamp is brought about, the translucent body (10) being the light coupled into it or a part thereof, in particular emits a small part of the light coupled into it directly or indirectly into the shielding area.

Description

DIRECTLY RADIANT LED LAMP WITH ANTI-GLIDING OPTICS The invention relates to a direct-radiating lamp with one or more LEDs as light sources, which is subject to glare conditions for certain viewing directions of the lamp, according to which the luminance in these viewing directions is less than a certain limit, for example 3000 cd / m ² .

LED lights with direct light emission from an LED light source in the direction of the surfaces to be illuminated often have very high point luminances at the light exit opening in the region of the emission cone, since a direct view of the LED is possible. This phenomenon occurs in particular when very efficient optical light control systems are used, such as high-gloss reflectors or crystal-clear lenses. According to lighting engineering standards, the very high point luminance levels are permitted when looking into the luminaire at angles <65 ° (in relation to the vertical), while above 65 ° the mean luminance levels are below a prescribed maximum value, e.g. 3000 cd / m ² , around the luminaire to dazzle. Especially with very well glare-free lights (cutoff), however, there is a negative effect for the user, which greatly impairs visual comfort. This effect is based on the fact that high luminance levels are perceived as more disturbing in a dark environment than in a bright environment. At the transition or the border from the glare-free area (> 65 ° in relation to the vertical) to the area of the beam cone (<65 ° in relation to the vertical) there is a light-dark boundary with a strong luminance contrast. When a user moves in the area of this transition, his eyes are suddenly and suddenly confronted with very high luminance levels. This abrupt increase in luminance leads to a strong glare effect, since the user's visual apparatus cannot adapt in such a short time.

There are various approaches to mitigate the abrupt difference in brightness in LED lights between the glare-free area and the beam cone.

According to a first approach, the LED and the light-directing optics are covered with a diffuser arranged downstream in the beam path in order to avoid a direct view of the LED or the LED chip. Due to the Lambertian scattering behavior of the cover plate, luminance levels also arise at high angles (> 65 ° in relation to the vertical), which reduces the luminance contrast, since the eye perceives a luminance even at high angles above 65 °. Since the luminance cannot be specifically controlled in these relevant solid angles, glare arises very quickly. Another disadvantage is that the optical efficiency is reduced with this measure.

Another approach are so-called LED panel lights, in which the light is emitted homogeneously over the surface in the room via edge coupling of the light of the LED into a flat light guide and corresponding coupling structures. Some of these panels are provided with foils or plates with anti-glare structures that limit the luminance in the relevant solid angles (> 65 ° in relation to the vertical) to less than 3000 cd / m ² . With this optical principle there is no sharp cut-off, ie there is perceptible luminance in the high angles with the advantage that there is no hard luminance contrast. The disadvantage of this principle is that there must be a very large light exit opening in order to achieve the corresponding glare limitation (<3000 cd / m ² at angles> 65 °). Due to the structural design, these lights have a limited optical efficiency.

Another approach is to remove glare from the LED light source in a conventional manner by means of a reflector which, in itself, produces a hard cut-off at the transition to the shielding area, but at the same time part of the light laterally in a so-called white To conduct the box and emit it into the room through a diffuse cover plate. With this method, the value of the luminance on the diffuse cover plate can be very / 22

AT 16 685 U1 2020-04-15 control the Austrian patent office well so that there is no glare. Disadvantages are the large number of components that are required to set up the system and the correspondingly large assembly effort.

The object on which the invention is based is to bring about glare control for a directly radiating luminaire with LEDs as light sources, in which a hard luminance contrast is avoided between the glare control region and the emission region, the luminaire having a higher optical efficiency and / or a simpler one Structure as known solutions.

According to the invention this object is achieved by a directly radiating luminaire with one or more LEDs as light sources, the LED or part of the LED being assigned a first light-directing device, which emits the light emitted by the or the associated LED by directed reflection onto one limited space and the first light-directing device is followed by a second light-directing device in the beam path of the light emitted by the LED, which has a translucent body that deflects at least part of the light by total reflection of the light passing through it and / or refraction, the light the LED is directed into the room by the first and second light directing devices in such a way that the lamp is glare-free in a shielding area which adjoins the main radiation area of the lamp, the translucent body being the light coupled into it or a part, in particular a small part of in emits it directly or indirectly into the shielding area.

The invention can provide that the lamp in the shielding area is dazzled to the extent that in the shielding area, based on a viewing direction in a plane that intersects the lamp, in particular, in the case of an elongated lamp, in a plane perpendicular to the longitudinal axis of the lamp and / or a C plane in the sense of DIN 5032-1: 1999-04, the average luminance of the light exit surface of the luminaire is below a limit, in particular below 3000 cd / m2.

[0010] Advantageous embodiments are specified in the subclaims.

The aim of the technical solution according to the invention is to increase the visual comfort of an LED light (for example for office work areas) by at the light-dark boundary between the shielding area (for example> 65 ° with respect to the perpendicular) and the beam area (for example <65 ° in relation to the vertical), a suitable luminance transition is created by suitable measures, which illuminates the eyes of a user when looking in the direction of the luminaire at appropriate angles so that there is no abrupt glare, since the visual system of the user occurs before entering the Area of the beam cone is addressed. The disadvantages of the above solutions are avoided, i.e. the solution according to the invention has a high optical efficiency, allows the smallest possible light exit area and enables precise light control.

In order to achieve a high optical efficiency, it is proposed to let the LED shine directly downwards, the glare limitation (cut-off) being generated by means of microreflectors which enclose the individual LED or groups of LEDs laterally or immediately so are connected downstream that the light of the LED essentially runs completely through or over these reflectors. Due to a suitable highly reflective coating (> 98% with silver coating) of the optically effective reflection surfaces, only very small losses can be expected here. The microreflectors can be combined in one or more reflector modules, each of which forms a uniformly manageable component.

In order to be able to tailor the light distribution in a targeted manner, it is further proposed to place an upstream lens on the microreflectors which distributes the bundled light of the reflector as desired into the relevant solid angles. As an alternative to this two-part arrangement, it is also possible to provide the upstream lens towards the LED with light-bundling elements that work according to the principle of total resection in a light-guiding body, which are exactly aligned with the position of the LED and thus that of the LED direct the emitted light into the corresponding solid angle. These totally reflecting light-bundling ele

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AT 16 685 U1 2020-04-15 Austrian patent office elements can either be built into the system separately from the lens, or they can also be molded directly onto the lens (e.g. by injection molding the lens with the individual totally reflecting light-bundling elements in one process or injecting one behind Extrusion lens with light-bundling structures based on the principle of total reflection in a light-guiding body).

Preferably, the lens has a linear dimension, such that it covers, for example, a linear LED array together with a microreflector array (or array of totally reflecting light-bundling elements).

Furthermore, it is proposed to form light-guiding surfaces lengthwise on both sides of the lens (so-called light guides), which act as light guides and a small, precisely metered proportion of the light from the LED which falls on the body containing the lens, branch off so that it is guided into it and preferably emitted by it as diffuse light.

[0016] Alternatively, the light guides could also be shortened to form stubs. At the end face, the coupled light is then emitted into a chamber, which is lined with white areas on the back and with translucent diffuser material on the front that emits the light into the room with a Lambertian distribution. This so-called white box chamber can be arranged on the right and / or left of the linear lens optics.

Furthermore, it is proposed to emit the light that is directed into the lateral light guides (LightGuides) via corresponding coupling structures that are located on the extensive surfaces of the two light guides.

The decoupling structures can be attached to both the front and back of the light guide, or only on the front, but preferably only on the back.

The decoupling structures can vary in their spatial distribution on the surfaces of the light guides (light guides), e.g. to generate a desired luminance curve or to produce a homogeneous luminance on the surfaces of the light guides, via which light is emitted into the room.

The decoupling structures can be designed differently. For example, printed dots (screen printing, ink-jet, etc.) are conceivable, but also pyramids, truncated pyramids, cones, truncated cones, cylinders, dome-shaped or pillow-shaped lenses, as well as free-form elements in various arrangements (hexagonal, orthogonal, algorithmic, etc.) ). The elements can protrude positively from the light guide surfaces, or they can also be impressively imprinted on the surfaces.

The structures can consist of the same material as the light guide and in particular be made in one piece with it, but also of other materials, such as e.g. with the already mentioned screen printing from printing ink, or e.g. also made of silicone or other materials that are suitable for coupling out light.

Since it is preferably a linearly extended optics, it is further proposed to manufacture the lens element together with the light guides via a plastic extrusion process and to form the decoupling structures as linear elements in the extrusion process.

With this method, different shape variants of the coupling-out structures can be generated, such as prismatic triangular shape, as sine wave, sawtooth-shaped, free-formed, etc.

Alternatively, it is also possible to choose a different production process, such as Plastic injection molding, 3D printing, extruding the lens and / or the light guide with subsequent hot stamping, back injection, etc.

Furthermore, it is proposed to have the cross section of the light guide taper towards the end, that the total reflection surfaces e.g. 3 ° to each other. This

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AT 16 685 U1 2020-04-15 Austrian Patent Office continuously changes the angle of the light during total reflection and leads to a higher coupling-out percentage at the end than at the beginning of the light guide. As a result, a higher uniformity of the luminance can be generated over the decoupling surface.

[0026] The spatial arrangement of the light guides to the optical axis can be different. It is possible e.g. a 90 ° arrangement to the vertical so that the light guide surfaces lie horizontally in the room. To couple the light into the light guide surfaces, the critical angles with regard to the total internal reflection laws must be observed and the corresponding coupling surfaces must be provided. However, it is preferable to choose an angled arrangement so that a structure is created which corresponds to a downward “V”, the angle between the optical axis and the light guide surface being selected such that the light exit or the light distribution of the actual lens is not circumcised. If e.g. the beam cone is 80 °, the opening angle between the optical axis and the light guide surface should be> 40 °.

The V-shaped arrangement of the light guide surfaces creates an additional cut-off transversely to the longitudinal extent of the lamp with respect to the viewing area on the lens.

In a further embodiment, the lateral light guide surfaces can be backed up with a white surface, an air gap between the light guide and the reflection material having to be maintained in order to allow total reflection in the light guide. This increases efficiency, since stray light that emerges from the back of the light guide when it is decoupled can be recycled and reflected forward through the light guide into the room.

In a further embodiment, the areas deposited can not only be white, but can also have any other color. One or more of these areas can in particular be light blue in whole or in part. In this way, the luminaire's appearance and design can be adapted to specific requirements.

It would also be conceivable that the colored areas are interchangeable, in that a colored film can be inserted behind the light guide surfaces.

Furthermore, it would also be conceivable to print the surfaces with patterns, the surfaces preferably being interchangeable in order to be able to flexibly change the appearance of the lamp.

[0032] A directly radiating lamp in the sense of the invention is to be understood as a lamp which has a directly emitted light component. This includes both luminaires that emit the light they emit completely directly and therefore have no indirect light component, as well as directly and indirectly emitting luminaires in which part of the light is emitted directly and part of the light indirectly.

In one embodiment, the light guides can protrude from the lamp body in such a way that they protrude laterally beyond it. In this way, light that is coupled out backwards from the light guide can be directed towards the ceiling and thus generate an indirect proportion of light.

In order to be able to adjust the proportion of indirect light, the preferably white backing surfaces can also be perforated in order to allow only a certain proportion of light to escape to the rear or above.

Instead of a perforated backing surface, a material could also be chosen that is opal and controls the proportion of indirect light through the proportion of the reflection particles in the material.

All proposed variants can also be arranged side by side in rows.

Advantageously, a lens with two laterally formed light guide surfaces increases the luminance at angles above a limit value (for example> 65 ° with respect to the optical axis) and thereby creates one for the eyes in the light-dark boundary area between the emission cone and the glare-free area the viewer 's pleasant transition, so that it is in the

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Moving into the beam cone does not result in an abrupt change from dark to very bright. An abrupt change creates strong glare and reduces visual comfort. The above arrangement prevents this sudden glare and increases the lighting comfort considerably.

[0038] In one embodiment, the aforementioned arrangement enables exact control of the luminance via the number and design of the coupling-out structures on the light guide surfaces. So it is possible to keep the luminance within the framework of the norm even with high luminous fluxes of the LED light source (eg <3000 cd / m ² above 65 °).

The arrangement mentioned above allows the visual light comfort to be realized or increased without reducing the optical efficiency.

[0040] The above-mentioned arrangement enables targeted light control despite an increase in luminance within the shielding area.

The invention also provides a directly radiating lamp with one or more LEDs as light sources, in which the LED or a part of the LED is assigned a first light directing device, which emits the light emitted by the assigned LED or LEDs by directional reflection limited a certain area of space, and the first light-directing device is followed by a second light-directing device in the beam path of the light emitted by the LED, which has a translucent body that deflects at least part of the light by total reflection of the light traveling in it and / or light refraction, the Translucent body of the second light directing device has one or more light guides or light guide sections, in which light emitted by the LED or LEDs is totally reflected at least once before exiting the lamp and at least one of the light guides or one of the light guide sections is in the form of a ke Has il-shaped plate.

It can be provided that the plate-shaped light guide or plate-shaped light guide section tapers in the direction away from the optical axis of the lamp or a parallel to the optical axis through the light source assigned to the second light-guiding device.

It can further be provided that one or more light guides or light guide sections have a light-coupling structure on one or both of their base surfaces, in particular a structure in the form of linear or pyramidal prisms or another linear or wavy structure.

It may also be provided that one or more light guides or light guide sections have a light-coupling coating on one or both of their base areas, which causes light to pass through the light guide or light guide section, in particular a coating according to a specific pattern, e.g. a dot pattern.

It can also be provided that one or more light guides or light guide sections are designed and arranged in such a way that light is coupled out on the side of the light guide or light guide section opposite the light exit side of the lamp, a reflector on this side of the light guide or light guide section, which can have one or more at least partially white and / or partially colored reflection surfaces, in particular a diffusely reflecting reflector, which reflects the light coupled out on this side from the light guide or light guide section back into the light guide or light guide section.

In this luminaire it can be provided that the first light-guiding device has a reflector which reflects light incident on it from the outside, or is formed by such a reflector.

It can also be provided that the first light directing device has or consists of a translucent body in which light that has entered the body is deflected by total reflection.

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AT 16 685 U1 2020-04-15 Austrian Patent Office [0048] It can be provided that said translucent body of the first light directing device is formed in one piece with the translucent body of the second light directing device.

Furthermore, it can be provided that the second light directing device emits at least part of the light entering it as diffuse light, which is at least partially emitted in the shielding area, in particular in the said transition area.

It can be provided that the light of the LED is directed into the room by the first and second light directing device in such a way that the lamp is glare-free in a shielding area which adjoins the main radiation area of the lamp, it being possible for it to be provided that the translucent body emits the light coupled into it or a part, in particular a small part of the light coupled into it, directly or indirectly into the shielding area. The anti-glare properties and the means for anti-glare can be those described above.

The invention is explained below with reference to exemplary embodiments with further details.

Fig. 1, Fig. 2, Fig. 3, Fig. 4, [0056] Fig. 5, [0057] Fig. 6, [0058] Fig. 7, [0059] Fig. 8, [0060 9 Fig. 10 Fig. 11 illustrates the light emission characteristic of a conventional direct-emitting LED lamp.

illustrates the light emission characteristic of a lamp according to the invention.

illustrates an embodiment of a lamp according to the invention in an exploded view.

shows the lamp according to the embodiment of FIG. 3 in a partial perspective view, the lamp being shown without an end wall.

shows the lamp according to the embodiment of FIG. 3 in a cross-sectional view.

illustrates the beam path of a lamp according to the embodiment of FIG. 3 in a cross-sectional view.

illustrates the light emission characteristic of the luminaire in the embodiment according to FIG. 3.

shows a lamp according to the invention according to a second embodiment in a cross-sectional view.

shows a third embodiment of a lamp according to the invention in a cross-sectional view.

shows a fourth embodiment of a lamp according to the invention in a cross-sectional view.

shows the beam path in a lamp according to the embodiment of FIG. 10.

Fig. 12 Fig. 13 Fig. 14 shows a fifth embodiment of a lamp according to the invention in a cross-sectional view.

illustrates the beam path in a luminaire according to FIG. 12.

illustrates a modification of the embodiment of FIG. 12, in which several rows of LEDs, each with associated optics, are arranged next to one another in a luminaire housing.

1 schematically illustrates the glare control of a conventional direct-emitting LED luminaire. With this lamp, the major part of the light is emitted in a symmetrical beam cone with an opening angle of 130 °, i.e. in an angular range of +/- 65 ° to the vertical. In this beam cone, the luminance is not limited to a specific one

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Maximum limited. Immediately adjacent to the beam cone, seen in a section plane perpendicular to the longitudinal axis of the lamp, is a shielding area of 25 ° to the horizontal, in which the luminance of the lamp is far below a limit value, which can be 3000 cd / m ² , for example , and is, for example, 200 cd / m ² or less. This shielding area covers the angles from 65 ° to 90 ° to the vertical. At the boundary between the radiation cone and the shielding area, the luminance increases abruptly.

2 shows the radiation characteristic of a luminaire according to the invention. Again, the beam cone extends over 130 °, ie over an angular range of +/- 65 ° to the vertical. The shielding area, which comprises the remaining 25 to the horizontal, ie the angular range from +/- 65 ° to +/- 90 °, has a transition area adjoining the emission cone, in which the luminance is lower than in the emission cone, but higher than in the glare-free area shown in black, in which the luminance lies below said limit value. Both the limit angle for glare control of 65 ° and the limit value of 3000 cd / m ² are exemplary and can also assume other values in specific embodiments of the invention.

3 to 5 show the structure of a first embodiment of a lamp according to the invention. This has a housing 1, in which an LED module 3 is arranged, on which LEDs 4 or groups of LEDs are arranged. Downstream of the LED module 3 is a reflector module 5 which has one or more reflecting reflectors and which in this embodiment is designed in the form of a grid which causes cross-glare control by the side reflectors 7 and longitudinal glare control by cross-blades 9. As can be seen from FIGS. 5 and 6, the side reflectors 7 limit the angular range in a plane perpendicular to the longitudinal axis of the lamp in which light is emitted by the LED either directly or after reflection from the side reflectors.

Downstream of the reflector module 5 in the direction of the light radiation is a translucent body 10, preferably made of a clear material, which has a central lens section 11 and light-conducting plates 13a and 13b directly adjoining this lens section, which have the shape of a parallelepiped and extend symmetrically on both sides of the lens section 11 obliquely in the direction of the light exit opening. On the side of the light guide plates 13a and 13b facing away from the light exit opening 15, a diffusely reflecting reflector 17a or 17b is provided, which is suitably attached to the light-guiding body 10, e.g. by pushing or snapping into a groove 19. The reflectors 17a and 17b can e.g. consist of a white or colored, in particular light blue foil and can have a completely or partially white or completely or partially colored, in particular light blue, reflective surface.

The light guide plates 13a, 13b are provided on the side facing the reflectors 17a and 17b with a prism structure 21 in order to couple the light out of the respective light guide plate 13a, 13b to the reflectors 17a, 17b. In the illustrated embodiment, the prisms are linear prisms with a triangular cross section. Other cross sections or prism shapes, e.g. Pyramid or truncated pyramid prisms can be used. Instead of a prism structure, another suitable structuring can be used, e.g. a wave or linear lens structure.

As illustrated in FIG. 6, part of the light emitted by the LED module 3 falls directly or after reflection on the side reflectors 7 of the reflector module 5 onto the lens section 11 of the translucent body 10 and becomes the light exit opening 15 via this directed. Part of the light does not strike the lenticular portion 11 after entering the body 10, but enters the side light guide plates 13a and 13b. Depending on the design of the translucent body 10, light that strikes it in the area of the lenticular section can also be directed in it to the lateral light guide plates 13a and 13b. In the light guide plates 13a and 13b, the light is reflected after a total reflection on the side facing the light exit opening 15 to the prism structure 21. There it emerges from the light guide plate 13a or 13b and falls on the reflector 17a or

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17b a. The light scattered at these reflectors in turn enters the light guide plate 13a or 13b via the prism structure 21 and then exits the light guide plate on the opposite side thereof. It can be seen from FIG. 6 that the angles of the rays to the vertical V which enter the light guide plates 13a and 13b are larger than the angles of the rays emanating from LED 4 which exit via the lenticular section 11 and are smaller on the other hand, than the angle of the rays coming from the LED 4, which are reflected on the side reflectors 7 of the reflector module 5. The consequence of this is that, as illustrated in FIG. 7, there is a glare-free area in which the glare-free condition in the sense of a restriction of the luminance is strictly fulfilled and a transition area lying between this glare-free area and the emission cone with a comfort level. Luminance, which lies between the luminance in the glare-free area and the luminance in the area of the emission cone. In this way, an observer who moves from the glare-free area into the area of the emission cone does not perceive an abrupt transition in luminance, but first the area with the comfort luminance, the luminance of which then, preferably continuously, passes into that of the area of the emission cone. As a result, an observer sees no abrupt transitions with a strong contrast.

In the embodiment of FIG. 3, a plurality of reflector modules 5 are provided, all of which are assigned to the LED module 3. The number of reflector modules 5 is purely exemplary. A single reflector module can also be provided for the entire LED module 3, just as more than two reflector modules can be provided for the LED module 3. In the same way, the grid shape of the reflector module 5 is exemplary. For example, it can also be provided that an LED 4 or a group of LEDs of the LED module 3 is each assigned a cup-shaped reflector which, analogously to the embodiments shown in the drawings, limits the light emission directions of the light emitted by the LEDs.

Instead of a reflector module with reflecting outer surfaces, a translucent body can also be provided, which in an analogous manner to the reflector module shown in FIGS. 3 to 7 deflects the light entering it by total reflection on its outer walls and then directly or to downstream optical elements delivers. This translucent body can also be formed in one piece with the lens section 11 and the light guide plates 13a and 13b.

Fig. 8 shows a modification of the embodiment of the lamp according to Fig. 3 to 7. The same reference numerals designate the same or corresponding elements of the lamp. In this embodiment, the light guide plates 13a and 13b have no prism structure on the side facing away from the light exit opening 15, but are provided on this side with a light-coupling pattern 31, which causes light to be coupled out from the light guide plates 13a and 13b. For example, this may be a pattern of printed dots applied to the light guide plates 13a and 13b by a screen printing process or an ink jet printing process. As in the embodiment of FIGS. 3 to 7, the pattern 31 causes the light from the light guide plates 13a and 13b, which is then reflected on the diffuse reflector 17a and 17b, to be coupled out again as diffuse light into the light guide plates 13a and 13b enters and is released on the opposite side from these light guide plates 13a and 13b. The pattern 31 can also reflect light incident thereon back into the light guide plate 13a or 13b. In particular, it can be provided that the pattern 31 directs light incident thereon or reflects it diffusely back into the light guide plate 13a or 13b.

Fig. 9 shows a further embodiment in which the parallelepiped-shaped light guide plates 13a and 13b are replaced by wedge-shaped light guide plates 41a and 41b, which taper towards the light exit opening 15 or towards the edge of the lamp. On the side of these wedge-shaped light guide plates 41a and 41b facing away from the light exit opening 15, a negative prism structure 43 is provided for decoupling the light from these light guide plates. As in the embodiment of FIGS. 3 to 7, this prism structure can be linear,

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i.e. the prisms extend in the longitudinal direction of the lamp and preferably have a constant cross section in a cross section perpendicular to the longitudinal direction of the lamp. However, they can also be three-dimensional, for example in the form of pyramid-shaped prismatic depressions, in the base sides of the light guide plates 41a and 41b.

The wedge-shaped light guide plates 41a and 41b taper towards the light exit opening with a wedge angle of approximately 3 °. In this way, the coupling to the edges of the lamp is continuously increased. In this embodiment, the prism structure also becomes denser towards the edges of the lamp in order to achieve a uniform luminance over the entire surface of the light guide plates.

10 shows a further embodiment of a lamp according to the invention, in which the light guides 51a and 51b adjoining the lens-shaped section 11 extend horizontally towards the edges of the lamp and merge into the lens section 11 via a curved section. In this embodiment too, the side of the light guides 51a or 51b facing away from the light exit opening 15 is provided with a light-coupling structure, e.g. a positive prism structure as illustrated in FIG. 5 or a negative prism structure as illustrated in FIG. 9. The beam path in this lamp is illustrated in Fig. 11. In this embodiment, light reflected at the side reflectors 7 of the reflector module 3 enters the light guides 51a and 51b laterally past the lenticular section 11. The light can also fall directly from the LED into the light guides 51a and / or 51b, or light that falls on the translucent body 10 in the region of the lenticular section 11 can be directed from there to the light guides 51a and / or 51b in the translucent body will. The light that has entered the light guides 51a and 51b is totally reflected there on the side facing the light exit opening 15, on the opposite side it is coupled out of the light guides 51a and 51b by the light-coupling structure, and diffusely reflected on the reflector 17a and 17b, and then occurs again into the light guide 51a or 51b and out of it on the opposite side as diffuse light.

12 and 13 show an embodiment of the lamp according to the invention, in which the light guides 61a and 61b adjoining the lenticular section 11 do not extend to the edges of the lamp, but rather each extend into a chamber 63a or 63b, each of which forms a so-called “white box”. These chambers are formed by a reflective roof wall 65a and 65b and a cover pane 67a and 67b opposite this. The reflectors 65a and 65b are diffusely scattering reflectors and can e.g. have a white or colored, in particular light blue reflection surface. Partially white and / or partially colored reflection surfaces are also possible.

In this embodiment, as illustrated in FIG. 13, part of the light entering the light-guiding body 10 enters the two light guides 61a and 61b and is emitted by them into the two chambers 63a and 63b. The light thus coupled into the chambers 63a and 63b is diffusely reflected on the chamber ceiling at the roof reflectors 65a and 65b and then emerges as diffuse light via the cover disks 67a and 67b. These cover plates can be designed to be diffusely scattering, so that the light is emitted into the room with a Lambertian distribution. In an alternative embodiment, they can be clear translucent panes. Diffuse light emission from the chambers 63a and 63b can also be achieved if the roof reflectors 65a and 65b reflect in a directed manner and diffuse the cover panes 67a and 67b. As an alternative or in addition to diffuse roof reflectors and / or diffusely scattering cover panes, a separate diffuser element can also be provided downstream in the chamber or chamber, onto which light is incident and which is diffused light. If necessary, the cover disks 67a and 67b can also be omitted, provided that other measures ensure that light emitted by the light guides 61a and 61b is emitted by the luminaire as diffuse light.

14 illustrates an embodiment of a luminaire according to the invention, in which two arrangements according to FIG. 12, each consisting of an LED module 3, a reflector

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AT 16 685 U1 2020-04-15 Austrian patent office dul 5, a translucent body 10 with a lenticular section 11 and lateral short light guides 61a and 61b as well as associated diffuse roof reflectors and opposing covers, arranged side by side and parallel to each other in a luminaire housing. In the embodiment shown, the inner chambers 63a and 63b are formed by a one-piece, bird-shaped diffuse reflector 71 and a cover disk 73 opposite this, which in one embodiment, as described above, can also be designed as a diffuser. 14, a distance remains between the reflector 71 and the cover disk 73 so that the two chambers are connected to one another, in a modification of this embodiment the tip of the reflector 71 can also extend as far as the cover disk 73, so that two separate chambers 63a and 63b are formed.

In the same way, also in the embodiments described above, several units, each with an LED module 3 and an associated reflector module 5 and an associated translucent body 10, can be arranged next to one another, in particular in a common lamp housing 1.

Different configurations of the illustrated and described embodiments of the invention are possible. For example, in an embodiment in which the second light guide device has a lens section and light guides or light guide sections arranged laterally therefrom, the area of the light guides or light guide sections can be twice as large or more than twice as large as the area of the lens-shaped section.

The features of the invention disclosed in the claims, the description and the drawings can be essential both individually and in any combination for the implementation of the invention in its various embodiments.

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REFERENCE SIGN LIST

casing

3rd LED module 4th LED 5 Reflector module 7 Side reflector 9 Cross slats 10th translucent body 11 Lens section 13a, 13b light-guiding plate 15 Light exit opening 17a, 17b diffuse reflector 19th Groove 21 Prism structure 31 Light coupling pattern 41a, 41b wedge-shaped light-guiding plate 43 negative prism structure 51a, 51b Light guide 61a, 61b Light guide 63a, 63b chamber 65a, 65b Roof wall 67a, 67b Cover plate 71 diffusely reflecting reflector 73 Cover plate V vertical

11/22

Claims (33)

1. Directly radiating luminaire with one or more LEDs (4) as light sources, the LED or LEDs (4) or part of the LED (4) being assigned a first light-guiding device which emits the LED or LEDs (4) Light is restricted to a certain spatial area by directional reflection, and the first light directing device is followed by a second light directing device in the beam path of the light emitted by the or the associated LED (4), which has a translucent body (10) that transmits at least part of the light Total reflection of the light passing through it and / or refraction of light is deflected, the light from the LED (4) being directed into the room by the first and second light directing devices in such a way that glare control is brought about in a shielding area which adjoins the main emission area of the luminaire , wherein the translucent body (10) the light coupled into it or a part, in particular a small emits part of the light coupled into it directly or indirectly into the shielding area. 2. Luminaire according to claim 1, characterized in that the translucent body (10) indirectly via a further optical device, such as in particular via a chamber (63a, 63b) with a reflective roof wall (65a, 65b) into which the translucent body ( 10) Feeds light, emits light in the shielding area. 3. Luminaire according to one of claims 1 or 2, characterized in that, based on a plane by an LED (4) or, in the case of a row-shaped arrangement of LEDs (4), by the longitudinal axis of the arrangement, which is the optical axis of the Luminaire includes, the shielding area corresponds to a first range of angles to the optical axis, the main radiation area corresponds to a second range of angles to the optical axis, which is different from the first range and contains the angle of 0 ° to the optical axis, and the first range of angles immediately adjacent to the second range of angles. 4. Luminaire according to one of claims 1 to 3, characterized in that the light of the LED is directed into the room by the first and second light directing means, - That the shielding area has a highly glare-free area in which, in particular with respect to a viewing direction in a plane that intersects the lamp, in particular, in the case of an elongated lamp, in a plane perpendicular to the longitudinal axis of the lamp and / or a C-plane in the sense of DIN 5032-1: 1999-04, the average luminance of the light exit surface of the luminaire is clearly below a limit, for example 3000 cd / m ² , and - That the shielding area has a transition area that connects to the highly glare-free area, in which the luminance lies between the average luminance in the highly glare-free area and said limit value and which preferably connects to the main radiation area of the lamp. 5. Luminaire according to claim 4, characterized in that, based on a plane by an LED (4) or, in the case of a row-shaped arrangement of LEDs (4), by the longitudinal axis of the arrangement which contains the optical axis of the lamp, the highly glare-free spatial area corresponds to a first area of angles to the optical axis, the main emission area corresponds to a second area of angles to the optical axis, which is different from the first area and contains the angle of 0 ° to the optical axis, and the transition space area corresponds to one corresponds to the third range of angles to the optical axis, which lies between and directly adjoins the first and second ranges. 6. Luminaire according to one of claims 1 to 5, characterized in that the light of the LED is directed into the room by the first and second light directing device in such a way that the average luminance in the shielding area, in particular based on a viewing direction in one plane, which the lamp cuts, in particular, in a long 12/22 AT 16 685 U1 2020-04-15 Austrian patent office stretched luminaire, in a plane perpendicular to the longitudinal axis of the luminaire and / or a CE plane in the sense of DIN 5032-1: 1999-04, starting from the boundary to the main radiation area of the luminaire, at least over one Part of the shielding area decreases continuously. 7. Luminaire according to one of claims 1 to 6, characterized in that the second light directing device is designed such that at least part of the light entering it is emitted as diffuse light, which at least partially emits in the shielding area, in particular in said transition area . 8. Luminaire according to one of claims 1 to 7, characterized in that said translucent body (10) of the second light directing device is designed such that direct or indirect diffused light is emitted into the shielding area. 9. Luminaire according to one of claims 1 to 8, characterized in that the first light directing device has a reflector which reflects light incident on it from the outside, or is formed by such a reflector. 10. Luminaire according to one of claims 1 to 8, characterized in that the first light-guiding device has or consists of a translucent body, in which light entering the body is deflected by total reflection. 11. Luminaire according to claim 10, characterized in that said translucent body of the first light directing device is integrally formed with the translucent body (10) of the second light directing device. 12. Luminaire according to one of claims 1 to 11, characterized in that the translucent body (10) of the second light directing device has one or more light guides (13a, 13b, 41a, 41b, 51a, 51b, 61a, 61b) or light guide sections, in which the light emitted by the LED (s) (4) is totally reflected at least once before exiting the lamp. 13. Luminaire according to claim 12, characterized in that at least one of the light guides (13a, 13b, 41a, 41b) or one of the light guide sections has the shape of a plate, in particular a wedge-shaped plate or a plate in the form of a parallelepiped. 14. Luminaire according to claim 13, characterized in that the plate-shaped light guide (41a, 41b) or plate-shaped light guide section tapers away in the direction from the optical axis of the lamp or a parallel to the optical axis through the light source assigned to the second light-guiding device. 15. Luminaire according to one of claims 12 to 14, characterized in that one or more light guides (13a, 13b, 41a, 41b, 51a, 51b) or light guide sections on one or both of their base surfaces have a light-coupling structure, in particular a structure in the form of linear or pyramidal prisms or other linear or wavy structure. 16. Luminaire according to one of claims 12 to 15, characterized in that one or more light guides (13a, 13b) or light guide sections on one or both of their base surfaces have a light-coupling coating which exits in the light guide (13a, 13b) or Light guide section causes running light, in particular a coating according to a certain pattern, for example a dot pattern. 17. Luminaire according to one of claims 12 to 16, characterized in that one or more light guides (13a, 13b, 41a, 41b, 51a, 51b) or light guide sections are designed and arranged such that on the side of the lamp opposite the light exit side of the lamp Light guide (13a, 13b, 41a, 41b, 51a, 51b) or light guide section light is coupled out, a reflector (17a, 17b) on this side of the light guide (13a, 13b, 41a, 41b, 51a, 51b) or the light guide section one or more at least partially white and / or partially colored reflection surfaces, in particular a diffusely reflecting reflector (17a, 17b), which is arranged on this side 13/22 AT 16 685 U1 2020-04-15 Austrian patent office the light guide (13a, 13b, 41a, 41b, 51a, 51b) or light guide section reflected light decoupled back into the light guide (13a, 13b, 41a, 41b, 51a, 51b) or light guide section. 18. Luminaire according to one of claims 12 to 17, characterized in that the one or more light guides (13a, 13b, 41a, 41b, 51a, 51b, 61a, 61b) or light guide sections from the optical axis or, in the case of several, arranged side by side Light sources are spaced from a parallel to the optical axis by the light source assigned to the second light directing device. 19. Luminaire according to one of claims 12 to 18, characterized in that the translucent body (10) of the second light-guiding device has light guide sections (13a, 13b, 41a, 41b, 51a, 51b, 61a, 61b) which are integral with a central section (11) of the light-guiding body (10) are connected, the optical axis of the lamp or, in the case of a lamp with a plurality of light sources used next to one another, being parallel to the optical axis of the lamp which runs through the light source assigned to the second light-guiding device central section runs. 20. Luminaire according to claim 19, characterized in that the central section (11) is lenticular. 21. Luminaire according to one of claims 12 to 20, characterized in that one or more light guides (61a, 61 b) or light guide sections each to a chamber (63a, 63b), the one or more reflecting walls (65a, 65b) and one Light exit surface, for example has a cover plate (67a, 67b), via which light can exit from the chamber (63a, 63b), adjoin or extend into this chamber (63a, 63b), at least part of the light guide (61a, 61b) or light guide section of incoming light is emitted from this light guide (61a, 61b) or light guide section into the chamber (63a, 63b) and immediately and / or after reflection on a reflecting wall (65a, 65b) of the chamber (63a, 63b) the light exit surface of the chamber (63a, 63b) is emitted. 22. Luminaire according to claim 21, characterized in that at least one of the walls (65a, 65b) of the chamber (63a, 63b) is diffusely reflective. 23. Luminaire according to claim 21 or 22, characterized in that a light-transmitting, light-scattering element (67a, 67b) is arranged in the light exit surface of the chamber (63a, 63b) or the light exit surface is formed by such an element. 24. Luminaire according to one of claims 21 to 23, characterized in that the chamber (63a, 63b) is formed by a diffusely reflecting roof reflector (65a, 65b) and a translucent element (67a, 67b), being on one side of the chamber (63a, 63b) the roof reflector and the translucent element are spaced apart and on this side the light guide (61a, 61b) or light guide section is adjacent to the chamber (63a, 63b) or extends into the chamber (63a, 63b) and on the opposite side of the chamber (63a, 63b), the roof reflector (65a, 65b) and the light-transmitting element (67a, 67b) are at a smaller distance or the roof reflector extends as far as the light-transmitting element. 25. Luminaire according to one of claims 1 to 24, with a plurality of LEDs (4) arranged next to one another, in particular a plurality of rows of LEDs (4) or groups of LEDs (4) arranged next to one another, each of which is assigned a first and second light-guiding device, the respective first and second light directing devices are arranged side by side. 26. Luminaire according to one of claims 1 to 25, characterized in that the luminaire has a plurality of LEDs (4) and the first light-directing device and / or the second light-directing device is assigned to all LEDs (4). 27. Luminaire according to one of claims 1 to 25, characterized in that the luminaire has a plurality of LEDs (4) and a plurality of first light directing devices, each 14/22 AT 16 685 U1 2020-04-15 Austrian patent office are assigned to different groups of LEDs (4) and / or have several second light control devices, each of which are assigned to different groups of LEDs (4). 28. Luminaire according to one of claims 1 to 27, characterized in that the first light-directing device is designed as a grid (7, 9), in particular as a mirror grid. 29. Luminaire according to one of claims 1 to 28, characterized in that the luminaire is set up to emit an indirectly radiating light component in addition to a directly radiating light component. 30. Luminaire according to claim 29, characterized in that the translucent body (10) of the second light-guiding device has one or more light guides (13a, 13b, 41a, 41b, 51a, 51b) or light guide sections which are designed for this or that LED (4) completely emits light before it exits the lamp, the light guides (13a, 13b, 41a, 41b, 51a, 51b) or light guide sections being designed to emit an indirect light component of the lamp. 31. Luminaire according to claim 30, characterized in that one or more light guides (13a, 13b, 41a, 41b, 51a, 51b) or light guide sections on the side facing away from the light exit surface of the luminaire for the direct light component, a light-coupling structure and / or one have a light coupling-out coating which effects a coupling out of light running in the light guide (13a, 13b, 41a, 41b, 51a, 51b) or light guide section, the lamp being designed to emit at least part of the light thus coupled out as an indirect light component. 32. Luminaire according to one of claims 30 or 31, characterized in that a partially translucent reflector is arranged on the base surface of one or more light guides (13a, 13b, 41a, 41b, 51a, 51b) or light guide sections facing away from the light exit surface of the lamp, which is designed to emit an indirect light component of the lamp. 33. Luminaire according to claim 29, characterized in that one or more light guides (61a, 61b) or light guide sections each to a chamber (63a, 63b), the one or more reflecting walls (65a, 65b) and a light exit surface, for example a cover plate (67a, 67b), via which light can emerge from the chamber (63a, 63b), adjoin or extend into this chamber (63a, 63b), the chamber (63a, 63b) having a partially translucent wall, in particular a partially has translucent roof reflector (65a, 65b) and at least a portion of the light entering the light guide (61a, 61b) or light guide section is emitted from this light guide (61a, 61b) or light guide section into the chamber (63a, 63b) and via the translucent one Wall is emitted as an indirect light component of the lamp.