AT16320U1 - lighting device - Google Patents

Abstract

The invention relates to a lighting device (10) for emitting light, in particular a wall washer lighting device (10), comprising: - at least one light source (12); - At least one optical arrangement (13) which is arranged in the emission direction of the light source (12) behind the light source (12); at least one reflector arrangement (11) which is arranged in the emission direction of the light source (12) behind the at least one optical arrangement (13), wherein the optical arrangement (13) is designed and arranged such that it receives light from the at least one light source ( 12) can asymmetrically lead to the reflector assembly (11), and wherein the at least one reflector assembly (11) is designed and arranged such that this light asymmetrically from the lighting device (10) can lead to a surface to be illuminated.

Description

description

LIGHT DEVICE

1. FIELD OF THE INVENTION

The present invention relates to a lighting device for emitting light, in particular a wallwasher lighting device.

2. BACKGROUND

From the prior art lighting devices for emitting light, in particular for the illumination of walls, facades and the like known as wallwasher lighting devices. Such lighting devices generally have at least one light source which is directed onto a reflector arrangement, such that the light is guided by the light source to the reflector arrangement and can emerge from the lighting device after deflection through the reflector arrangement and can illuminate a surface to be illuminated. For targeted alignment of the radiated light, it is also known to form the reflector assembly so geometrically curved or form such with a coating or optical elements that the exiting light can be targeted directed to a surface to be illuminated. For example, this allows certain areas of the area to be illuminated to be illuminated more or less strongly.

In practice, it has now been found that there is still a need to make a targeted deflection of the exiting light in such lighting devices more flexible, especially when reflector assemblies are used which have a fixed reflector geometry. In such lighting devices, the light output characteristic is more or less predetermined by the manufacturing side provision of the reflector assembly.

In the light of this prior art, it is therefore one of the objects of the present invention to provide a lighting device, in particular a wallwasher lighting device, with which a more flexible light output is made possible by the lighting device.

These and other objects, which will become apparent upon reading the following description or which will be recognized by those skilled in the art, are achieved by the subject-matter of the independent claim. The dependent claims further form the central idea of the present invention in a particularly advantageous manner.

3. DETAILED DESCRIPTION OF THE INVENTION

According to the present invention, there is provided a light emitting device, in particular a wall washer light emitting device, comprising: at least one light source; at least one optical arrangement which is arranged in the emission direction of the light source behind the light source; at least one reflector arrangement which is arranged in the emission direction of the light source behind the at least one optical arrangement, wherein the optical arrangement is designed and arranged such that this light from the at least one light source can asymmetrically lead to the reflector arrangement, and wherein the at least one reflector arrangement such is formed and arranged that this light can asymmetrically lead from the lighting device to a surface to be illuminated.

In other words, the present invention proposes to provide at least one optical arrangement between the light source and the reflector arrangement, with which the light of the light source can be directed asymmetrically on the reflector arrangement, so that already a first targeted light distribution in through the optical arrangement Direction of the reflector assembly is made possible and then a second targeted light distribution from the lighting device can be provided by the reflector assembly. This makes it possible to provide a considerably greater flexibility of the light distribution by the lighting device, in particular without having to change the geometry of the reflector arrangement we considerably. In other words, by the quasi double asymmetric light pipe or light guide in a comparatively wide range, a targeted and directed light distribution can be provided by the lighting device.

Under an asymmetric light distribution or asymmetric light pipe is to be understood that the light is not uniformly or homogeneously guided by the optical arrangement on the reflector assembly or of the reflector assembly of the lighting device.

Preferably, the light source is a directional light source that emits light in a preferred main emission direction. It is particularly preferred that the light source is an LED light source, which preferably comprises at least one LED array. By such a directed light source, the light can already be selectively guided in the optical arrangement, so that with such a light source, the lighting device has relatively low leakage losses.

Advantageously, the optical arrangement is arranged on the at least one light source. This is to be understood as meaning that the optical arrangement is arranged on the at least one light source in such a way that substantially all the radiated light of the light source can be guided directly into the optical arrangement. Also by this measure, the scattered light component of the lighting device can be reduced in an advantageous manner.

In a preferred embodiment of the lighting device, the optical arrangement is arranged immovably to the light source and the reflector assembly. In this embodiment, therefore, the light distribution to the reflector assembly factory or installation side preset.

Alternatively, it is preferred that the optical arrangement is arranged so movable to the light source and the reflector arrangement, that the light output to the at least one reflector array is adjustable. As a result, it is possible to be able to vary the light distribution from the optical arrangement to the reflector arrangement on the installation side or even at a later time. In this connection, it is preferable that the optical arrangement is rotatably arranged with respect to a main emission direction of the light source and / or tiltable. Depending on the optical arrangement used, it may be preferred that a light distribution from the optical arrangement to the reflector arrangement can be adjusted by a rotary movement or by a tilting movement of the optical arrangement. Such mobility of the optical arrangement can be provided, for example, by means of a corresponding mounting of the optical arrangement and / or by means of corresponding joint arrangements.

Advantageously, the optical arrangement concentrates the light entering from the light source and outputs it as a directed light cone to the at least one reflector arrangement. If the reflector arrangement is designed, for example, with a spherical paraboigeometry or as an elongate parabolic trough, it is possible to emit the light from the optical arrangement onto a specific region of the reflector arrangement (ie asymmetrically) such that the light from the optical arrangement has a certain angle on the optical system Reflector arrangement is issued.

Advantageously, the optical assembly comprises at least one lens element having a collimator region / portion (i.e., a collection region) which focuses the incoming light. Thereby, it is possible to first concentrate the light emitted by the light source with the collimator region of the lens element and then to guide it in a targeted manner to the reflector arrangement or into another lens element. Furthermore, it is preferred that the optical arrangement comprises at least one further lens element with a total reflection area. In a particularly preferred embodiment, the optical arrangement is provided by a lens element which comprises both a collimator area and a total reflection area. As a result of the total reflection range, the light can be directed to the reflector arrangement in a targeted manner without substantial light scattering occurring.

The total reflection region of the lens element of the optical arrangement is preferably at least partially formed as a so-called Fresnel structure. Such a structure provides an easy way to provide such a total reflection range.

In a preferred embodiment, the reflector assembly is arranged immovable to the optical arrangement. As a result, it is possible to provide the asymmetrical light output of the reflector arrangement already at the factory or factory by a corresponding design of the reflector arrangement, for example as a spherically curved structure, so that the user or the installer no longer has to adjust the light distribution through the reflector arrangement. Alternatively, it is possible to design the reflector arrangement such that it can move in such a way that the light output from the lighting device can be adjusted. Such a design is particularly advantageous if the greatest possible flexibility of the light output is to be provided by the lighting device. Such mobility of the reflector arrangement for optical arrangement can be provided for example by a tiltability of the reflector arrangement with respect to the optical arrangement.

Advantageously, the reflector arrangement emits the light as a directed light cone. The reflector arrangement is preferably at least partially formed as a spherical parabolic reflector. Such a design of the reflector arrangement is particularly preferred when the lighting device comprises only one or a small number of light sources, so that a corresponding light distribution can be carried out by only a spherical parabolic reflector.

In particular, when the lighting device to illuminate a larger or wider area, it is preferred that the reflector assembly is at least partially formed as an elongated parabolic trough. This makes it possible to arrange a plurality of light sources in the light-emitting device at a distance from one another and to guide them through a corresponding number of optical arrangements, which are preferably assigned to the respective light sources, into different regions of the elongate paraboration.

An asymmetric light distribution through the parabolic reflector or through the parabolic trough is advantageously provided by the fact that the parabolic reflector or the parabolic trough is at least partially bent or spherically formed so that the light can be emitted according asymmetrically, preferably as a directed beam of light ,

Advantageously, the lighting device comprises a plurality of light sources, preferably LED light sources, each associated with at least one optical arrangement and the respective light in a common reflector array, preferably an elongated parabolic trough, leave.

4. DESCRIPTION OF A PREFERRED EMBODIMENT

Hereinafter, a detailed description of the figures will be given. FIG. 1 shows a schematic cross-sectional view of a preferred embodiment of a lighting device according to the invention; Figure 2 is a schematic view of the preferred embodiment shown in Figure 1; FIG. 3 shows a schematic sectional view of an optical arrangement which is preferably used in the lighting device; Figure 4 is a schematic sectional view of the optical arrangement shown in Figure 3; Figure 5 is a schematic view of the optical arrangement shown in Figures 3 and 4; Figure 6 is a schematic view of an exemplary light distribution through the preferred optical arrangement shown in Figures 3 to 5; FIG. 7 shows an exemplary light distribution through the reflector arrangement preferably used in FIGS. 1 and 2; and FIG. 8 shows a schematic view of an exemplary light distribution through the preferred embodiment of the lighting device according to the invention.

Figure 1 shows a schematic cross-sectional view of a preferred embodiment of a lighting device 10 according to the invention, comprising a reflector assembly 11, in the preferred embodiment in the form of an elongated parabolic trough 11, a plurality of light sources 12, in the preferred embodiment in the form of an LED light source (wherein only one LED light source 12 can be seen in the cross-sectional view shown in FIG. 1) and optical arrangements 13 (once again only one optical arrangement 13 can be seen in the cross-sectional view shown in FIG. 1).

As can be clearly seen in FIG. 1, the light source 12 or the light sources 12 are (directly) arranged on the optical arrangement 13 or on the optical arrangements 13, so that substantially all of the light of the light source 12 shown can be guided in the optical assembly 13.

Figure 2 shows a schematic view of the lighting device 10 shown in Figure 1. Identical parts are therefore provided with the same reference numerals.

As can be clearly seen in Figure 2, the lighting device 10 is formed as an elongated wallwasher lighting device 10 and includes a plurality of optical assemblies 13, which are each arranged over corresponding LED light sources 12. The LED light sources 12 are arranged in an especially preferred manner on an elongate conductor track 14.

As is also clearly visible in Figure 2, the light of the light sources 12 is first performed in the optical assemblies 13 and directed by these targeted to the reflector assembly 11 (here an elongated parabolic trough 11), from which it in turn to one of Reflector assembly 11 opposite light exit region 15 of the lighting device is directed.

In the figures 3 to 5, the optical arrangement 13 shown in Figures 1 and 2 in a lighting device 10 according to the invention particularly preferred used in more detail.

As shown in FIGS. 3 to 5, the optical arrangement 13 comprises a collimator area 16, with which the light originating from the light source 12 can be collected and focused, and a total reflection area 17, with which the light is aimed (ie asymmetrically). can be delivered to the reflector assembly 11. In the figures 3 and 4, the beam guidance is indicated schematically. As can also be clearly seen in FIGS. 3 to 5, the total reflection region 17 comprises an asymmetrical Fresnel structure, so that a targeted light emission as a corresponding light cone is made possible by the total reflection. In FIG. 5, the light output or the direction of light emission by the optical arrangement 13 is indicated by the arrows 18.

By the preferred embodiment of the optical arrangement 13 shown, it is thus possible to selectively guide the light guided by the respective light sources 12 into the respective optical arrangements 13 through a corresponding orientation of the optical arrangement 13 at a specific angle into the reflector arrangement 11 ,

As can be seen in Figures 3 and 4, the optical arrangement 13 and the optical arrangements 13 on fastening means 19, here in the form of locking lugs 19, with which the optical assembly 13 and the optical assemblies 13 in a corresponding to the wall portion of the lighting device 10 can be rotatably mounted or latched.

Due to the rotatable design of the optical arrangement 13, it is possible to adjust the light output to the reflector assembly 11, so that a targeted, asymmetric light output by the lighting device 10 is possible, with the optical arrangement 13 and by the optical arrangements 13th a much higher flexibility of the light output by the lighting device 10 can be provided.

FIG. 6 shows a schematic view of an asymmetrical light distribution that can be provided by an optical arrangement 13, as shown in FIGS. 3 to 5. FIG. 7 shows a schematic view of an asymmetrical light distribution, as may be provided by the reflector arrangement 11 shown in FIGS. 1 and 2, for example. FIGS. 6 and 7 show the light distribution as it can be provided by a light source 12, an optical arrangement 13 and a reflector arrangement 11. If a plurality of light sources 12 and a plurality of optical arrangements 13 are used, correspondingly a plurality of light distributions, which can also be superimposed or can be guided separately, can be provided.

FIG. 8 shows an exemplary asymmetrical light output, as may be provided by a lighting device 10. As can be clearly seen in FIG. 8, as a result of the asymmetrical light output of the optical arrangement 13 and the asymmetrical light output by the reflector arrangement 11, an overall asymmetrical light output by the lighting device 10 can be achieved, wherein the use of the optical arrangement 13 or the optical system Arrangements 13, a high flexibility of the light output of a lighting device 10 according to the invention can be provided.

In other words, by the quasi-twice asymmetric light distribution through the optical assembly 13 and the reflector assembly 11, the ability to provide a targeted light distribution, without having to change the geometry of the reflector assembly 11 substantially, so that a lighting device 10 according to the invention light in different directions (for example, a different left-right distribution, as shown in Figure 8) to allow.

As shown in FIGS. 3 to 5, an optical arrangement 13 having a collimator region 16 and a total reflection region 17 is particularly preferably used, such lenses generally being known as so-called "TIR lenses". The use of such lenses makes it possible not only to bundle or collect the light, but also to deliver it to the reflector arrangement 11 at a defined angle.

The present invention is not limited to the particularly preferred embodiment shown above, as long as it is encompassed by the subject matter of the following claims. In particular, in other embodiments, one or more reflector arrangements, which can be designed differently, can be used. It is also possible to use other or different optical arrangements as long as they can each provide a targeted or asymmetrical light distribution.

Claims (10)

claims 1. lighting device (10) for emitting light, in particular a wallwasher Leuchtvor-direction (10), comprising: - at least one light source (12); - At least one optical arrangement (13) which is arranged in the emission direction of the light source (12) behind the light source (12); at least one reflector arrangement (11) which is arranged in the emission direction of the light source (12) behind the at least one optical arrangement (13), wherein the optical arrangement (13) is designed and arranged such that it receives light from the at least one light source ( 12) can asymmetrically lead to the reflector assembly (11), and wherein the at least one reflector assembly (11) is designed and arranged such that this light asymmetrically from the lighting device (10) can lead to a surface to be illuminated. 2. A lighting device (10) according to claim 1, wherein the light source (12) is a directional light source (12) which emits light in a main emission direction. 3. Lighting device (10) according to any one of claims 1 or 2, wherein the light source (12) is an LED light source (12), which preferably comprises at least one LED array. 4. lighting device (10) according to any one of the preceding claims, wherein the optical arrangement (13) on the at least one light source (12) is arranged. 5. Lighting device (10) according to any one of the preceding claims, wherein the optical arrangement (13) immovable to the light source (12) and the reflector assembly (11) is arranged. 6. lighting device (10) according to one of claims 1 to 4, wherein the optical arrangement (13) is arranged so movable to the light source (12) and the reflector assembly (11) that the light output to the at least one reflector assembly (11) is adjustable , 7. A lighting device (10) according to claim 6, wherein the optical assembly (13) is rotatably arranged with respect to a main radiation direction of the light source (12). 8. lighting device (10) according to any one of claims 6 or 7, wherein the optical arrangement (13) is formed tiltable with respect to a main emission of the light source (12). 9. lighting device (10) according to any one of the preceding claims, wherein the optical arrangement (13) bundles the light from the light source (12) entering light and emits as a directed light cone to the at least one reflector assembly (11). 10. Lighting device (10) according to one of the preceding claims, wherein the optical arrangement (13) comprises at least one lens element with a collimator region (16) which focuses the incoming light. 4 sheets of drawings