DE102016219970A1 - Lighting system with several lights - Google Patents

Abstract

In a lighting system (100) with a first lamp (10) which is designed to emit a first light (A), a second lamp (20, 30, 40, 50, 60) which is capable of emitting a second light (B) and energy collecting means (25, 35, 45, 55, 65) positioned in an area illuminated by the first lamp (10) and adapted to detect and convert part of the first light (A) into electrical energy , the energy generated by the energy collecting means (25, 35, 45, 55, 65) is provided to the second lamp (20, 30, 40, 50, 60).

Description

The present invention relates to a lighting system comprising a plurality of lights which are provided and adapted to emit light in different ways.

Lighting systems, with the help of flexible and comfortable different areas to be illuminated, usually consist of several different types of luminaires, which are positioned in different ways and are adapted to emit light in different ways. In rooms, for example, where one or more individual workstations are located, it is often no longer common today to realize a light output which is substantially constant over the entire room, merely by means of luminaires arranged or fastened to the ceiling of the room. Instead, although usually ceiling lights are still available, which provide for a so-called general or basic lighting, for individual lighting of individual workplaces but then additional lights are used, which are locally positioned and usually only in the workplace for provide a certain lighting. Often these are standing or table lamps positioned near the workplace, which are also activated depending on the current use of the workstation. Thus, if a workstation is being used, the room as a whole is lightened with the general lighting of the ceiling lights, but the local light then provides increased brightness, especially in the area of the workstation, in order to ensure optimum working conditions there. However, in the event that the workstation is currently unoccupied, the increased local brightness is deactivated by switching off the corresponding lamp and the workplace itself is only brightened with the brightness provided by the general lighting. Ultimately, this results in a total of a more pleasant appearance for the illuminated room, although in spite of everything for the particular application of individual areas optimized lighting conditions are present.

The present invention is based on such, consisting of several different types of lights system, the invention is based on the task to design the lights in such a way that their interaction is optimized. On the one hand, this concerns the question of the energy efficiency of the system and the possibility of making the lighting system even more flexible overall. Also, the possibilities available through new lighting technologies are to be further optimized.

The object is achieved by a lighting system having the features of the independent claims. Advantageous developments of the invention are the subject of the dependent claims.

A first idea according to the invention relates to a special type of configuration of the luminaires responsible for the local or individual lighting, such that the overall energy efficiency of the system is increased. This idea makes use of the fact that the luminaires responsible for the mentioned general lighting are usually designed and arranged to emit light uniformly over a larger area, in which case the luminaires responsible for the local lighting are located within this area. This opens up the possibility of positioning solar cells or comparable energy collecting means in the area illuminated by the general lighting, which use the light of the general lighting in order to generate electrical energy. This energy obtained in this way can then be used by the luminaires responsible for the local lighting, it being ideally provided that the luminaires responsible for the local lighting are operated exclusively by the energy provided by the solar cells or energy collecting means. This not only increases the overall energy efficiency of the system, but also improves the flexibility of the system in positioning the luminaires responsible for the local lighting, since ideally, as already mentioned, these luminaires are operated solely by the energy collected via the energy harvesting means and accordingly, in particular, not to the general Power supply network need leading cable. This leads directly to the fact that these lights can be positioned much more flexible and rearranged, without this being associated with any restrictions or major work.

According to this first aspect of the invention, therefore, a lighting system is proposed, comprising a first luminaire, which is designed to emit a first light, a second luminaire, which is designed to emit a second light, and energy collecting means, which illuminate in one of the first luminaire Positioned and are adapted to detect a part of the first light and convert it into electrical energy, wherein the energy generated by the energy collecting means of the second light is provided. In particular, it can be provided that the second light is operated exclusively by the energy provided by the energy collecting means.

According to a preferred embodiment of the invention it is provided that the energy collecting means are directly part of the second light. If the second light is thus realized, for example, as floor or table lamp, then it makes sense to arrange the energy collecting means at the top of the corresponding lamp head of the second light. The energy collecting means are thereby automatically in an optimal position for detecting the light emitted by the first light, so that here the inventive concept can be implemented in a simple and efficient manner. In an alternative embodiment, however, it would also be conceivable to design the energy-collecting means separately from the body of the second luminaire and then to couple it in a suitable manner to the second luminaire. Corresponding embodiments of this will be described in more detail below with reference to FIGS.

In particular, the second lamp may, as mentioned above, preferably be designed such that the corresponding illumination of the associated area depends on whether it is being used or not. According to a preferred embodiment it can therefore be provided that the second luminaire has sensors or is connected to sensors via which an automatic control of the second luminaire is supported. Depending on the purpose for which the local lighting is used, it may be provided that the light output of the second luminaire differs from that of the first luminaire with respect to the geometrical light emission characteristic, ie the question in which region and how concentrated the light is emitted. and / or with respect to the color or color temperature of the light. This measure also helps to illuminate individual areas in such a way that a suitable for the corresponding application of the area lighting is present.

A second aspect of the present invention is based on the use of the light emitted by the lamps for data transmission or communication. It is known in the art to use visible light for short-range wireless communication for transmission of digital data. A corresponding communication protocol for this purpose is known as "light fidelity" (LIFI) and is based on the fact that the light output is modulated or pulsed in a way imperceptible to an observer in order to transmit data in this case. The corresponding procedure is known in principle, but a practical implementation thereof usually fails because the range of the transmission is limited and error-free data transmission can be easily disturbed by external influences.

According to a second aspect of the invention, it is therefore provided for optimizing the data transmission by means of LIFI that the second luminaire responsible for the local illumination is used as a so-called repeater or signal amplifier. In this case, first the first luminaire transmits data about the first light emitted by it by means of LIFI, in which case the second luminaire is designed, on the one hand, to receive the data transmitted with the aid of the first light and, on the other hand, to transmit corresponding data by means of LIFI via the second light to convey. Since, as a rule, the second luminaire is then significantly closer to the area illuminated by it and devices positioned therein for receiving the LIFI signal, this significantly improves data transmission and reduces the susceptibility to errors.

According to a second aspect of the present invention, therefore, a lighting system is proposed, which has a first light, which is designed to emit a first light, and a second light, which is designed to emit a second light, wherein the first light is designed to by means of LIFI to use the emitted first light for data transmission, and further, the second light is adapted to receive the data transmitted by means of the first light data and then transmit corresponding data by means of LIFI on the second light.

In this case, this aspect of the invention can be used independently of the previously described idea of energy-collecting means. In a synergistic manner, however, it can be particularly preferably provided that the energy collecting means are used to receive the data transmitted by means of LIFI via the first light. This means that the solar cells provided on the second luminaire are not only used for energy collection but also serve as receivers for the data transmitted by means of LIFI.

A particularly preferred embodiment provides in this case that the first luminaire transmits the data in encrypted form, while the second luminaire decrypts the data and forwards it in decrypted form via the second light. Since, when using visible light for data transmission, there is always a certain risk that the light is detected by external observers and the data transmitted with it are tapped, it is often provided to initially encrypt the data in order to increase data security. However, in order to reduce the effort for receiving the data on the receiver side, the invention provides that only via the first Distance, that is, from the first to the second light toward an encrypted data transmission takes place, on the other hand, on the other hand, ie from the second light to the terminal decrypted data transmission takes place. On the one hand, this facilitates the use of LIFI communication by consumers, since the terminal positioned in the area illuminated by the second luminaire and used for data reception does not have to be designed for encrypted communication, on the other hand, the risk of external data being obscured by external observers unwanted way to be tapped, reduced. This danger would only exist for the distance from the second light to the terminal, which is significantly shorter compared to the first distance and accordingly the risk of data tapping is significantly lower.

In a further development of this idea described above, it can then be further provided that the luminaires responsible for the local illumination not only enable a data transmission to the terminal, but possibly also additionally support an upward communication. In this case, the second luminaire is then additionally designed to detect a LIFI signal delivered by a user terminal and to transmit the data contained in the detected LIFI signal by means of a further LIFI signal. For this purpose, the second luminaire can either have a separate transmitter for signal transmission or optionally also use illuminants which are provided for indirect illumination. That is, the light for indirect illumination of the second light is then in turn modulated in a corresponding manner to allow signal transmission by means of LIFI. Corresponding receivers for the signal transmitted by the second luminaire can either be arranged separately, for example, on the ceiling of the room or integrated into the luminaires of the first type. Again, it may be provided in turn that at least the data transmission from the second light to the first light or to the general receiver takes place in encrypted form.

Ultimately, therefore, the various ideas of the present invention contribute to the fact that lighting systems can be used even more varied and fulfill additional tasks. At the same time, the energy consumption of the entire system can be maintained within a reasonable range despite all the measures described.

• 1 ein erstes Ausführungsbeispiel eines erfindungsgemäßen Beleuchtungssystems, bei dem das von Leuchten des ersten Typs abgegebene Licht zur Energieversorgung weiterer Leuchten genutzt wird;
• 2 - 4 Varianten erfindungsgemäßer Beleuchtungssysteme, bei denen der erste erfindungsgemäße Aspekt genutzt wird;
• 5 ein weiteres Beleuchtungssystem, bei dem die Datenübertragung mittels LIFI durch Leuchten des zweiten Typs unterstützt wird;
• 6 eine vorteilhafte Weiterbildung des Beleuchtungssystems von 5 und
• 7 eine Weiterbildung der Beleuchtungssysteme der 5 und 6, bei denen die Leuchten des zweiten Typs auch eine Aufwärtskommunikation mittels LIFI unterstützen.

The invention will be explained in more detail with reference to the accompanying drawings. Show it:

• 1 a first embodiment of a lighting system according to the invention, in which the light emitted by lamps of the first type light is used to supply energy to other lights;
• 2 - 4 Variants of lighting systems according to the invention, in which the first aspect of the invention is used;
• 5 another lighting system in which the data transmission by means of LIFI is supported by lights of the second type;
• 6 an advantageous embodiment of the lighting system of 5 and
• 7 a development of the lighting systems of 5 and 6 in which the luminaires of the second type also support uplink communication via LIFI.

The illumination systems according to the invention described below are described as systems for illuminating a room. Of course, these systems can also be used more versatile, for example, in larger public areas, factories or the like. That is, depending on the application, a special type of delivery in terms of the geometric distribution and the color or color temperature is sought in particular for the individual or local light output. In this regard, however, there are no restrictions and the second lights can then be designed in a corresponding manner to effect the respective light output.

A first embodiment of a generally with the reference numeral 100 provided system is here in 1 shown. It serves - as already mentioned - for a room 500 in which jobs are provided, here schematically through the table 510 be represented. The lighting system 100 First of all, this indicates lights of a first type 10 on, which cause the lighting referred to below as general lighting. This is intended to the room 500 overall uniformly with a certain basic or basic brightness to illuminate, so that in the room 500 orient people and recognize the objects and / or people inside. It has been found that an illuminance of about 300 lux is sufficient for this purpose.

As already mentioned, the general lighting for the entire room 500 or at least for the area in which the system 100 is used, should be homogeneous, should the lights of the first type 10 be designed and positioned so that a uniform Lighting is achieved. For one, this means that the lights 10 ideally in the upper part of the room 500 are positioned and, for example, directly on or in the ceiling 501 of the room 500 assembled. A version as pendant lights or attachment to suspended support systems would be conceivable. Furthermore, it is advantageous if the lights of the first type 10 are designed such that a large-area light output is achieved and this also takes place in a wide range of angles. Accordingly, for example, a matrix or grid-like arrangement of a plurality of corresponding lamps of the first type is suitable 10 at.

Compared to the total area of the room 500 The area of the workplace to be illuminated is significantly smaller 510 , In the present case, it is initially assumed that this is a desk workstation, for example, where documents are to be created and / or read. It has been shown that the illuminance of the general lighting of about 300 lux is too low to provide optimal working conditions. Instead, a partially higher illuminance of, for example, 500 lux should be present here.

At the in 1 illustrated lighting system 100 is therefore intended to be on the table 510 itself or in the vicinity of this additional local lights are positioned, which now targeted the work surface of the table 510 should illuminate. In 1 Here are one directly on the table 510 positioned table lamp 20 and in addition a laterally arranged floor lamp 30 shown. The positioning and design of these lights 20 . 30 is preferably such that in fact only the work surface of the desk 510 is illuminated. The light output of these lights 20 . 30 So it can be very different from that of the first type 10 differ. For example, there could be a significantly more directed light output, by means of which the light is focused directly onto the area of the workstation to be illuminated.

The combination of luminaires arranged on a ceiling of a first type for general lighting and of local luminaires for partial individual lighting of specific areas is also already known. New is now in the in 1 illustrated embodiment, the way the power supply of responsible for the local lighting lamps of the second type, ie the table lamp 20 as well as the floor lamp 30 , It is envisaged that on the tops of the lamp heads 21 respectively. 31 the two lights 20 . 30 solar cells 25 respectively. 35 are arranged. As already mentioned, the luminaires of the first type 10 the room 500 to illuminate evenly, the lamp heads are 21 . 31 the local lights 20 . 30 of course, be located in the area of the lights of the first type 10 is illuminated. That is, usually the lamp heads would 21 . 31 even possibly cause shading of the general lighting. According to the invention, however, it is now provided that this on the tops of the lamp heads 21 . 31 incident light of the general lighting through the solar cells 25 . 35 collected and as electrical energy the lights 20 . 30 self-provided. That is, from the lights of the first type 10 emitted first light A of the general lighting is to a certain extent by the local lights 20 . 30 collected and in turn provided in the form of electrical energy. This is then used to control the delivery of the second light B by the local lights 20 . 30 at least to support. Ideally, the local lights can do this 20 and 30 be designed so that they apart from the energy harvesting means in the form of solar cells 25 . 35 need no additional power supply and therefore do not need to be connected to the general power grid. This of course means that then both local lights 20 . 30 can be easily rearranged or positioned and thus the flexibility is significantly increased.

The local lights 20 . 30 Then, using the energy obtained from the light A for the general lighting, the second part of the light B is emitted, with the help of which the energy at the workplace 510 desired increased luminosity of 500 lux, for example, is achieved. It should be noted in this regard that the local lights 20 . 30 Not only are responsible for achieving the desired higher luminosity but of course the light A of the general lighting contributes to this. That is, the local lights 20 . 30 should only the anyway by the lights of the first type 10 In addition, brightness obtained to increase optimal working conditions in the workplace 510 to accomplish. This is with appropriate interpretation of the solar cells 25 . 35 occupied spaces as well as use of energy-efficient bulbs quite feasible, so that in fact the local lights 20 . 30 if necessary, can be operated without further energy supply. This indicates that in 1 illustrated lighting system 100 an extremely high energy efficiency, in spite of which the requirements with regard to the quality of the lighting of the various areas can be reliably met.

It should be noted in this context that, as already mentioned, the various Luminaire types can also deliver light of different color or color temperature. For example, the first light A of the general lighting can be used to provide biological well-being in the room 500 supporting persons. This can be realized, for example, in that the first light A emits a light of higher color temperature of, for example, above 5000 Kelvin. Optionally, the color temperature of this first light A during the day can be easily adjusted accordingly.

For local lighting, on the other hand, it can be provided that light is emitted here, which specifically targets the workplace 510 supported work. It has been found, for example, that the reading of documents or the like is particularly well supported by a light emission of light with a color temperature below 5000 Kelvin. Accordingly, therefore, at least in the embodiment according to 1 the lights 20 . 30 Deliver light with a color temperature designed for this purpose, so that the workplace is illuminated in total in the desired brightness and with the desired color temperature.

Furthermore, it can be provided that in particular the lights responsible for the local lighting 20 . 30 are designed so that only a light emission occurs by them when the workplace 510 is actually used. This can of course be done by appropriately provided manually operated switch or controls. An automated control by sensors or the like would be conceivable, which then the automatic operation of these local lights 20 . 30 support. The lights 10 For general lighting, on the other hand, the room should be more general and therefore more permanent 500 illuminate. Again, however, it may be provided that when the first light A is emitted for general lighting, for example, light from outside is taken into account by windows. Also in this case are the lights 10 coupled with corresponding sensors or control units that detect the incident daylight from outside and based on a control of the lights of the first type 10 make. Of course, such measures can also be applied to the further variants of the illumination system according to the invention which are described in more detail below 100 be provided.

It should now be based on the 2 - 4 three variants of in 1 shown illumination system 100 to be discribed. The same elements are provided here with the same reference numerals.

All variants shown here is in common that basically by lighting the first type 10 a general lighting A is provided and continue to use local lights are used, which convert with the help of appropriate energy collection means a part of the light of the general lighting A into energy, which is then used to operate the local lights for the local light output B.

It is in the in 2 illustrated lighting system 100 again provided by the individual lighting B targeted the work surface of a desk 510 to illuminate. However, here it is now a light 40 used in the upper part of one side of the table 510 positioned shelves 41 is arranged. Since it is now, for example, a spotlight, so it is a luminaire, which is significantly smaller in terms of their external dimensions than the large-scale designed lamp heads 21 . 31 the in 1 shown lights 20 respectively. 30 , is now provided, the solar cells used for energy 45 not directly on the body of the lamp 40 arrange yourself but outsource instead. In particular, the solar cells are provided in the illustrated embodiment 45 on the top of the shelf 41 to arrange. These are thus in an optimal position to detect the light A of the general lighting and as electrical energy to operate the lamp 40 to provide. The lamp 40 is then via a corresponding cable connection or the like with the solar cells 45 coupled. With regard to the types of light output of the different lights, the above applies. The same applies to the various possibilities for automated control of the different types of lights.

The embodiment according to 3 characterized by the fact that now with the help of local lights 50 no workplace should be lit. Instead, the local lights serve 50 now to the surfaces of a shelf 51 lighten. The only schematically illustrated local lights 50 are then each on the corresponding undersides of the shelves 52 positioned and cause a brightening of the underlying subjects or areas. These are in particular areas which, due to corresponding shading effects, are not optimally characterized by that of the luminaires of the first type 10 emitted light A brightened for general lighting. Again, by the individual local lights 50 then a correspondingly optimized illumination of these areas can be achieved. Depending on the nature of the use of the corresponding areas can thereby the emission of light of the local lights 50 be adjusted accordingly. Be the shelves 51 for example, for the presentation of certain Used products or goods, it can be made in terms of color or color temperature specifically tailored light output.

The power supply of the local lights 50 takes place as well as in the embodiment according to 2 through solar cells 55 , in turn, on the tops of the shelves 51 are arranged. Since relatively large areas are available here, can through the solar cells 55 a sufficiently high amount of energy can be obtained to operate all the local lights 50 is being used.

4 finally shows another variant, in the first turn as well as in 3 a shelf 51 is provided with local lights 50 to illuminate the individual shelves. In addition, now is a mobile showcase 61 provided, which could also be used, for example, for the presentation of goods, exhibits or the like. In the interior of this showcase 61 Here are two local lights 60 provided the presentation area of the showcase 61 specifically illuminate and for this by solar cells 65 be energized at the top of the showcase 61 are positioned. In an analogous manner, the solar cells also detect here 65 the light A of the general lighting and then put this in the form of electrical energy for the local lights 60 to disposal. In this case, this embodiment shows particularly well that the inventive concept significantly increases the flexibility in terms of the possibilities for the arrangement of the lights, namely because the showcase 61 can now be easily positioned at a new location without this would have to be connected via a cable to an external power source.

It could of course be provided that all local lights are additionally connected in case of need via a cable connection to an external power source. Nevertheless, the solution according to the invention contributes to a higher energy efficiency of the system. Furthermore, it may be provided in an advantageous manner in the various embodiments, that the lights or the energy collection means have an energy storage in the form of a battery or the like, through which the energy collected by the solar cells optionally cached and then at a later time the local lights available is provided. Such a procedure is particularly useful when the local lights are not permanently activated in comparison to general lighting but only depending on the situation.

5 relates to a further aspect of the present invention, which is individually usable, but possibly also with the basis of the 1 - 4 explained inventive concept could be combined, as will be explained in more detail below.

Again, that points in the 5 illustrated illumination system according to the invention 100 first of all lamps of a first type 10 on, which cause a light output A to achieve a general lighting. With regard to the type of light emitted and the positioning of the luminaires 10 this applies in connection with the 1 - 4 said.

Furthermore, lights of the second type are provided, which in the illustrated embodiment is now two table lamps 20 as well as a floor lamp which is in the area of two desks 510 or are positioned on it and their task is again in turn, with the help of a further light output B on the general lighting A beyond the workstations of the two tables 510 specifically to illuminate.

In the 5 illustrated invention now relates to the idea that by the light output in addition to a data transmission to be realized. In particular, a data transmission in accordance with the so-called LIFI communication protocol can be provided, in which the visible light is modified, in particular modulated, in a manner imperceptible to an observer and the transmission of digital information is thereby made possible. Such data transmission is already known, but is certainly associated with some problems or difficulties. Thus, the range for the signal transmission is relatively low and the reliability of the signal transmission can be adversely affected by numerous effects. For example, incidental daylight may play a role or shading effects due to further objects in the room, in particular also due to the local lights 20 . 30 , At the in 5 The system shown thus has the of the lights 10 emitted first light A at least one signal transmission component A ' on, though, on the desks 510 or at the workstations located terminals can not always reliably receive the data transmitted herewith.

In order to improve the signal transmission is therefore provided according to the invention, the local lights 20 . 30 to be used as a signal amplifier or repeater for signal transmission. On the tops of the lamp heads 21 respectively. 31 are accordingly now receiving units 26 respectively. 36 provided that of the lights of the first type 10 emitted light A , in particular its signal component A ' capture and accordingly receive the data transmitted via LIFI. Also the lights of the second type 20 . 30 are then executed accordingly, that they cause a data transfer by means of LIFI. That is, the second emitted light B also has a signal component B ' on top of the work surfaces of the desks 510 is delivered. As the bulbs of the local lights 20 . 30 much closer to the desks 510 are located here user terminals such as handhelds or the like much more reliable and error-free receive the signals. Because at the same time the lamp heads 21 respectively. 31 the local lights 20 . 30 much closer to the lights of the first type 10 and here the danger of shading effects is clearly lower, is also for the first signal range of the lamps of the first type 10 to the lights of the second type 20 . 30 towards a better signal transmission feasible. Ultimately, therefore, by the measures, the transmission of data from the lights of the first type 10 to at workplaces 510 positioned user terminals are improved significantly by means of LIFI.

In this case, according to a preferred embodiment, it may be provided that the data transmission is additionally made more secure by encryption. However, an encryption is preferably only on the first signal transmission path, ie between the lights of the first type 10 and the lights of the second type 20 . 30 performed. That is, the lights 10 for general lighting A first transmit the data using LIFI in encrypted form. The local lights 20 . 30 on the other hand, the received signal is decrypted and transmitted on the second path in unencrypted form. In this way, it is ensured that the user terminals do not have to decrypt data and accordingly can participate in the data transmission by means of LIFI in a simple manner. At the same time, unwanted external picking up of the transmitted data is much less likely, since, although the light transmitted over the first path can be detected by external observers, encryption is present here. Only on the short distance from the local lights 20 . 30 towards the user terminals then the unencrypted data transmission takes place. Such a type of communication is useful, for example, in a café, a lobby or in general in cases in which, for example, a guest Internet access is to be made available.

A development of the just described thought is in 6 shown. This further development is that the idea of increasing the energy efficiency by means of solar cells is combined with the idea of improving the transmission of data by means of LIFI. Instead of separate receivers for the LIFI signal are now used for energy production solar cells 25 . 35 used. Accordingly, these also simultaneously represent the sensors for the signal acquisition of the LIFI signal. It is merely an evaluation of the temporal change in the height of the solar cells 25 . 35 required energy resulting from the modulation or the pulsation of the light for signal transmission required. Furthermore, since solar cells are available which function at different wavelengths, it would even be conceivable to realize multichannel communication in this way. Furthermore, it would be conceivable to additionally integrate one or more separate LIFI receivers into the solar cell arrangement, which then detect the LIFI signal more sensitively and more quickly and, if necessary, are also aligned in different directions in order, for example, to receive LIFI signals from different directions. In all this variant, in turn, the advantageous developments with regard to the encrypted transmission on the route between the lights of the first type 10 and the local lights 20 . 30 be used.

7 finally shows a further development of the basis of 5 presented concept, in which now the local lights 20 . 30 Additionally, they can also be used to support uplink LIFI data transfer. That is, from a user terminal 550 that is in the area of one of the jobs 510 is arranged, transmitted by LIFI signals are now in a first step by the local lights 20 . 30 through appropriate sensors 27 . 37 detected. These lights 20 . 30 then have on their upper side means for data transmission by means of LIFI. In the case of the right table lamp 20 (The left lamp is not intended for Aufwährtskommunikation in the case shown) is this a separate transmitter or transmitter 28 available, with the floor lamp 30 however, are at the top of the lamp head 31 Means for indirect light emission 38 provided, which emit a third light C, which is a signal component C ' admixed or superimposed. This represents a particularly preferred embodiment, but has the consequence that in the floor lamp 30 the top of the lamp head 31 if necessary, can no longer be used for arranging solar cells. This light 30 If necessary, it must be connected to a separate power supply or at least be connected to external solar cells. The corresponding recipients 16 for that from the local lights 20 . 30 transmitted LIFI signal can then be at the lights 10 provided or can - as shown - also separately thereof, for example, on the ceiling 501 of the room 500 be positioned. The transmitters 28 In this case, the local luminaires may optionally be designed in such a way that they deliver the corresponding signal strongly concentrated in a specific direction in order to selectively communicate with a specific receiver 16 take.

In the 6 shown variant brings with it special advantages, as a rule, the user terminals 550 are unable to produce a sufficiently strong signal for the LIFI transmission, which can also be detected by remote receivers or to generate the required signal with a reasonable energy expenditure. Again, the local lights are used 20 . 30 as a signal amplifier or repeater, so that now a much better and more reliable signal transmission in both directions can be realized. It can also be provided here that in particular on the second path between local lights 20 . 30 and ceiling lights 10 or recipients 16 the signal transmission is encrypted.

It should also be noted that the idea of supporting uplink communication using LIFI might also be used separately from the use of local lights as a repeater for downlink communication. Particular advantages, however, are achieved in terms of communication when in both directions signal transmission through the local lights 20 . 30 is supported.

Finally, it would also be conceivable to use the local lights generally as a gateway between different communication standards. In this case, only one of the two routes uses data transmission by means of LIFI, while on the other route a different type of transmission takes place, e.g. by radio, infrared, wire, etc. The local lights thus provide a corresponding implementation of the signal to provide a variety of communication options available.

Ultimately, therefore, the concepts of the invention in many ways lead to improvements by which the use of lighting systems can be made more flexible and efficient.

Claims (14)

Lighting system (100) with A first light (10) designed to emit a first light (A), A second lamp (20, 30, 40, 50, 60) designed to emit a second light (B), • energy collecting means (25, 35, 45, 55, 65) positioned in an area illuminated by the first lamp (10) and adapted to detect and convert part of the first light (A) into electrical energy, the energy generated by the energy collecting means (25, 35, 45, 55, 65) is provided to the second lamp (20, 30, 40, 50, 60). Lighting system after Claim 1 , characterized in that the second lamp (20, 30, 40, 50, 60) is operated exclusively by the energy provided by the energy collecting means (25, 35, 45, 55, 65). Lighting system after Claim 1 or 2 , characterized in that the energy collecting means (25, 35, 45, 55, 65) are part of the second lamp (20, 30, 40, 50, 60). Lighting system according to one of the preceding claims, characterized in that the second lamp (20, 30, 40, 50, 60) comprises means for storing the energy provided by the energy collecting means (25, 35, 45, 55, 65) or with corresponding means for storing is connected. Lighting system according to one of the preceding claims, characterized in that the second lamp (20, 30, 40, 50, 60) has a sensor or is connected to a sensor via which an automatic control of the second lamp (20, 30, 40 , 50, 60) is supported. Lighting system after Claim 5 , characterized in that the sensor is a presence sensor. Lighting system according to one of the preceding claims, characterized in that the first lamp (10) is adapted to use by LIFI the emitted first light (A) for data transmission, wherein the second lamp (20, 30) is adapted to the with Help of the first light (A) to receive transmitted data and transmit data via LIFI via the second light (B). Lighting system after Claim 7 , characterized in that the energy collecting means (25, 35) are used to receive the medium LIFI via the first light (A) transmitted data. Lighting system comprising • a first lamp (10) designed to emit a first light (A), • a second lamp (20, 30) designed to emit a second light (B), the first lamp (10 ) is further adapted to use by LIFI the emitted first light (A) for data transmission, and wherein the second lamp (20, 30) is further adapted to receive the data transmitted by means of the first light (A) and to transmit corresponding data via LIFI via the second light (B). Lighting system according to one of Claims 7 to 9 , characterized in that the first lamp (10) transmits the data encrypted and that the second lamp (20, 30) decrypts the data and transmitted in decrypted form with the aid of the second light (B). Lighting system according to one of Claims 7 to 10 , characterized in that the second lamp (20, 30) is adapted to detect a LIFI signal output by a user terminal (550) and to send the data contained in the detected LIFI signal to a receiver (LIFI signal) by means of a further LIFI signal. 16), wherein the transmission of the data by the second light (20, 30) preferably takes place in encrypted form. Lighting system after Claim 11 , characterized in that the second lamp (30) comprises means for emitting a light (C) for indirect illumination, wherein the transmission of the data by the second lamp (30) by means of the light (C) for indirect illumination. Lighting system according to one of the preceding claims, characterized in that the first lamp (10) is a lamp which is arranged or fixed on or in the ceiling (501) of a room (500). Lighting system according to one of the preceding claims, characterized in that it is at the second lamp (20, 30, 40, 50, 60) is a floor or table lamp.

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