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WO2019114952A1 - Luminaire et procédé de transfert de données sans fil à l'aide d'un tel luminaire - Google Patents

Luminaire et procédé de transfert de données sans fil à l'aide d'un tel luminaire Download PDF

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Publication number
WO2019114952A1
WO2019114952A1 PCT/EP2017/082676 EP2017082676W WO2019114952A1 WO 2019114952 A1 WO2019114952 A1 WO 2019114952A1 EP 2017082676 W EP2017082676 W EP 2017082676W WO 2019114952 A1 WO2019114952 A1 WO 2019114952A1
Authority
WO
WIPO (PCT)
Prior art keywords
luminaire
data
luminaires
optoelectronic semiconductor
semiconductor chip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2017/082676
Other languages
English (en)
Inventor
Frank Kwong Yew Kiu
Hock Pheng LOW
Boon Chea LOOI
Chong Ghee LIM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ams Osram International GmbH
Original Assignee
Osram Opto Semiconductors GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osram Opto Semiconductors GmbH filed Critical Osram Opto Semiconductors GmbH
Priority to PCT/EP2017/082676 priority Critical patent/WO2019114952A1/fr
Publication of WO2019114952A1 publication Critical patent/WO2019114952A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/116—Visible light communication
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/19—Controlling the light source by remote control via wireless transmission
    • H05B47/195—Controlling the light source by remote control via wireless transmission the transmission using visible or infrared light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • a luminaire is provided. Moreover, a method for wireless data transfer is provided.
  • An object to be achieved is to provide a luminaire which is capable of energy-efficient wireless data transfer.
  • the luminaire comprises one or a plurality of optoelectronic semiconductor chips.
  • the optoelectronic semiconductor chips are light emitting diodes, LEDs for short.
  • the optoelectronic semiconductor chips are laser diodes, LDs for short .
  • the at least one optoelectronic semiconductor chip is configured to emit a first pulsed radiation.
  • the first pulsed radiation is for example near-ultraviolet radiation, visible radiation and/or near-infrared radiation.
  • a mean frequency the first pulsed radiation is modulated with is preferably at least 1 MHz or at least 10 MHz or at least 100 MHz.
  • the pulsing of the first pulsed radiation is done in a digital manner, that is, by switching on and turning off the at least one optoelectronic semiconductor chip. A current by which the optoelectronic semiconductor chip is operated is thus
  • the luminaire comprises one or a plurality of photodetectors.
  • the at least one photodetector is designed to detect a second pulsed
  • the second pulsed radiation does not stem from the at least one optoelectronic semiconductor chip.
  • the photodetector is a photodiode.
  • the photodetector can have a plurality of sensitive regions and might be a CCD chip.
  • the luminaire includes a wire-based data interface. Said interface is to receive and to send digital data.
  • a bit rate for the data transfer via is preferably at least 1 Mbit/s or at least 10 Mbit/s or at least 100 Mbit/s or at least 1 Gbit/s or at least 10 Gbit/s.
  • the luminaire is connected to a data line, which is for example a glass fiber.
  • the luminaire is connected to the Internet or to a telephone net by means of the data interface.
  • the luminaire comprises one or a plurality of electronics units.
  • the at least one electronics unit is to control the at least one
  • the luminaire in order to emit the first pulsed radiation at least partly according to a data input received at the data interface and to convert the detected second pulsed radiation at least partly to a data output to be sent at the data interface.
  • the luminaire receives input data at the interface, said data is processed in the electronics unit and is sent by the optoelectronic semiconductor chip.
  • light signals are received by the photodetector and are converted to output data by the electronics unit, said output data being sent by the luminaire through the interface.
  • the luminaire is capable for light fidelity, Li-Fi for short.
  • wireless data transfer can be achieved by the luminaire by sending and receiving light instead of radio waves as in the case of Wi Fi .
  • At least 60% or at least 80% or at least 90% of an average power consumption of the luminaire is used to produce visible light.
  • the majority of the energy consumed by the luminaire is to eliminate a surrounding of the luminaire.
  • the receiving and sending of data is not the main function of the luminaire.
  • the luminaire is a combined device for producing light and also for wireless data transfer.
  • the light emitted by the luminaire appears of constant brightness to the human eye. That is, the radiation used in particular to send the data is modulated so fast that the human eye cannot sense said modulation.
  • the luminaire comprises at least one optoelectronic semiconductor chip to emit a first pulsed radiation, at least one photodetector to detect a second pulsed radiation, a wire-based data interface to receive and to send digital data with a bit rate of at least 1 Mbit/s and at least one electronics unit to control the optoelectronic semiconductor chip in order to emit the first pulsed radiation at least partly according to a data input received at the data interface and to convert the detected second pulsed radiation at least partly to a data output to be sent at the data interface so that light fidelity is realized.
  • At least 60% of an average power consumption of the luminaire is used to produce visible light that appears of constant brightness to the human eye.
  • said luminaire which is preferably a streetlight, it is possible to provide an alternative to radiofrequency-based mobile telecommunications networks.
  • said luminaire which is preferably a streetlight
  • the network is distributed in segments called cells, each cell being served by at least one fixed-location transceiver, known as a cell site or base transceiver station (BTS) .
  • BTS base transceiver station
  • This base transceiver station provides the cell with the network coverage which can be used for transmission of voice, data and others. Therefore, each time the network bandwidth or network coverage needs to be increased, the base transceiver station needs to be upgraded or a new one needs to be built. This can be quite expensive.
  • the exponential increase in mobile data transfer in the last few decades has led to an increase of wireless systems deployment. As a consequence of this, the RF spectrum has become congested.
  • BTS needs a lot of energy to transmit or receive wireless signals.
  • the largest consumer of energy in wireless mobile communication is a BTS. This is due to two main reasons. The first reason is an inefficient RF power amplifier, which consumes 60% to 70% of the total energy supplied and only a small part of the energy is converted into useful output. The second reason is that the non-uniform traffic load in the network points to improper and inefficient planning of radio resources.
  • the mobile phone traffic in a cell area (BTS area) is uncertain, it changes from hour to hour and day to day. Hence the transmission rate changes as well.
  • the proposed luminaire uses Li-Fi technology to address these issues.
  • Li-Fi or Light Fidelity is a Visible Light Communications (VLC) System running wireless
  • Li-Fi can use common household LED (light emitting diodes) lightbulbs to enable data transfer. Therefore, by utilizing existing streetlight networks and/or lighting networks in buildings to form a seamless intricate communication network, the above- mentioned three issues faced by a traditional cellular communication network can be dealt with.
  • a land area is divided into hexagonal cells depending on terrain and reception
  • BTS transceiver stations
  • These BTS provide the cell with the network coverage which can be used for transmission of voice, data and others.
  • the group of frequencies can be reused in other cells, provided that the same frequencies are not reused in adjacent and/or neighboring cells as that would cause co-channel interference.
  • the BTS are connected to one another via central switching centers which track calls and transfer them from one base station to another as callers move between cells.
  • the handoff is ideally seamless and unnoticeable .
  • Each base station is also connected to the main telephone network and/or internet and can thus relay mobile calls to landline phones.
  • digitalized information from a base station controller is encoded and modulated using various modulation schemes available before being converted to an RF domain for transmission.
  • Wireless cellular communication using the current method of transmission based on radiofrequency suffers from limited spectrum capacity and high energy consumption.
  • Concerning the limited spectrum capacity global mobile data traffic grew about 63% in 2016.
  • Global mobile data traffic reached 7.2 exabytes per month at the end of 2016, up from 4.4 exabytes per month at the end of 2015.
  • This exponential increase in mobile data traffic has led to the massive deployment of wireless systems based on RF.
  • the limited available RF spectrum is subject to an aggressive spatial reuse and co-channel interference has become a major capacity-limiting factor. This could lead to an "RF spectrum crisis " .
  • VLC Visible Light Communications
  • the common VLC today is known as Li-Fi or Light Fidelity.
  • Li-Fi is similar to Wi-Fi technology as both transmit data electromagnetically . However, Wi-Fi uses radio waves while Li-Fi runs typicality on visible light or near infrared radiation. Li-Fi is a Visible Light Communications (VLC) system. This means that it utilizes a photodetector to receive light signals and a signal processing element to convert the data into binary content which can be streamed out digitally.
  • VLC Visible Light Communications
  • An LED lightbulb is a semiconductor device. This means that the constant current of electricity supplied to an LED lightbulb can be manipulated at extremely high speeds, without being visible to the human eye. For example, data is fed into an LED light bulb with signal processing technology, it then streams out the binary data embedded in its beam at high speeds to a photodetector like a photodiode. The tiny changes in the rapid dimming of LED bulbs is then converted by the receiver into an electrical signal. This signal is then converted back into a binary data stream. Therefore, standard signal encoding in telecommunication like TDMA, CDMA can be applied in the binary data stream.
  • power amplifiers in transmitter and receiver systems in the BTS use the most power.
  • the inefficient power amplifier could be replaced with LED lighting and LED drivers to perform the transmitting while using photodetectors to receive data.
  • the framework for this communication could be implemented by using the established protocol of orthogonal frequency division multiplexing (OFDM) .
  • LED driver circuits utilize much less energy and the energy loss is much smaller compared to that of a power amplifier deployed under the traditional transmitter and receiver system.
  • the information or series of binary data is preferably first demultiplexed into N parallel streams, and each one can be mapped to a complex symbol stream using some modulation constellation like QAM, PSK, or the like.
  • An inverse Fast Fourier transform, FFT for short is computed on each set of symbols, giving a set of complex time-domain samples.
  • these samples are then quadrature-mixed to passband in the standard way.
  • the real and imaginary components can then be summed into a stream of signals which could then be used to modulate the flicker of the LED via an LED drivers and/or combiners module .
  • sampling can be done by using a photodetector based multi-coupler, and a forward FFT is used to convert back to the frequency domain. This returns N parallel streams, each of which is converted to a binary stream using an appropriate symbol detector. These streams can then be re-combined into a serial stream, which is an estimate of the original binary stream at the transmitter .
  • the Li-Fi-capable transmitter and receiver system could utilize streetlights instead of dedicated RF antennas .
  • a base transmission station (BTS) is a necessity.
  • the investment for setting up BTS for capacity expansion or network upgrade is huge.
  • the operating cost of a BTS is also high, due to its energy consumption.
  • the high energy need is particularly due to the inefficient RF power amplifier, which consumes 60% to 70% of the total energy supplied, and only a small part of the energy is converted into useful output.
  • the luminaire described here uses inexpensive components like LEDs, LED drivers, photodetectors to replace power amplifiers and RF combiners to realize preferably the orthogonal frequency division multiplexing (ODFM) protocol.
  • ODFM orthogonal frequency division multiplexing
  • buck converter As a driver for the luminaire described here a so-called buck converter can be used, for example the buck converter AP1509 from Diodes Incorporated. Such buck converters reach
  • VLC Visible Light Communications
  • the visible light spectrum includes 100s of THz, of license free bandwidth. This is about 10,000 times more than the entire RF spectrum up to 30 GHz.
  • Recent research, too, has shown that data rates in excess of 1 Gbit/s can be obtained using off-the-shelf phosphor-coated white LEDs, and 3.4 Gbit/s has been demonstrated with an off- the-shelf red-green-blue (RGB) LED.
  • RGB red-green-blue
  • Li-Fi wireless communication could potentially be created by integration of Li-Fi wireless communication inside a building with the Li-Fi capable network architecture similar to 3G. This could offer a low-cost solution for creating a seamless network of communication inside and outside structural buildings.
  • the luminaire is a streetlight.
  • the luminaire then has a designed luminous flux of at least 2000 lm or 2500 lm or 3500 lm or 5000 lm.
  • the luminaire is a room light.
  • luminaire amounts to preferably at least 500 lm or 700 lm or 1000 lm.
  • the luminaire has an illumination range and/or a receiving range of at least 30 m or 50 m or 80 m along at least one direction. It is possible that said range is of circular shape when seen in top view so that the luminaire may cover an area all around the
  • the luminaire further comprises a light source to produce at least 90% or 95% or all of the visible light emitted by the luminaire. While in operation, the light source is preferably operated in
  • the light source is not or not significantly modulated.
  • the light source is based on semiconductor devices like LEDs. In this case it is possible that only the at least one optoelectronic
  • semiconductor chip is modulated to send the data input.
  • the at least one optoelectronic semiconductor chip is designed to produce at least 90% of the visible light emitted by the luminaire while in operation.
  • the at least one optoelectronic semiconductor chip is also modulated to send the data input.
  • the at least one optoelectronic semiconductor chip and/or the at least one photodetector are located at a height of at least 3 m or 4 m or 6 m above ground level. With such a comparably large height it is possible to increase a range of the luminaire and to send and/or receive data across car tops.
  • the electronics unit includes one or a purity of the following elements: a base station controller (BSC) , a power supply unit (PSU) , drivers preferably for a plurality of the optoelectronic
  • semiconductor chips one or a purity of transceivers, and a multi-coupler. It is possible that said components are integrated in one single chip or that said components are assembled as individual components for example on a printed circuit board. Moreover, it is possible that the different elements of the electronics unit are distributed over the different parts of the luminaire.
  • the electronics unit is configured as a base transceiver station, BTS for short.
  • the electronics unit includes one or a plurality of fast Fourier transform
  • the electronics unit is preferably designed for orthogonal frequency division multiplexing .
  • semiconductor chip is near-infrared radiation.
  • this configuration it is particularly possible that there is a plurality of optoelectronic semiconductor chips emitting at different wavelengths. For example, at least one
  • optoelectronic semiconductor chip that emits visible light is combined with one or a plurality of semiconductor chips emitting near-infrared radiation, possibly at different peak wavelengths in the near-infrared spectral range.
  • the method uses one or, preferably, a plurality of luminaires according to one or a plurality of the embodiments described above. Thus, features of the luminaire are also disclosed for the method and vice versa.
  • the at least one luminaire in operation sends and receives data from at least one movable participant with a bit rate of at least 1 Mbit/s and at least 60% of an average power consumption of the luminaire is used to produce visible light that appears of constant brightness to the human eye.
  • Constant brightness can mean that neither the luminous flux nor the color of the light varies for the human eye.
  • the movable participant is a pedestrian or a vehicle like a car, a bike, a motorbike or a lorry.
  • each one having a maximum range within which the data can be received and sent to the at least one movable participant.
  • a cell is defined within the respective luminaire that is capable to receive and to send the data.
  • the luminaires are arranged so that the adjacent cells overlap.
  • the movable participant can always be connected to at least one of the luminaires and can receive and send data all the time.
  • the luminaires are operated with orthogonal frequency division multiplexing (OFDM) using ultraviolet, visible and/or infrared radiation.
  • OFDM orthogonal frequency division multiplexing
  • the frequencies used by adjacent luminaires for the OFDM to receive and to send the data preferably differ from one another .
  • the luminaires are arranged in at least one line along a street.
  • the at least one movable participant can be a car that drives on said street.
  • the data link to the luminaire can be
  • the car may also have an additional light source to send data to the luminaire, whereupon said data are received by the photodetector of the luminaire.
  • At least some of said luminaires are coupled together and communicate in a wire-based manner with each other to form a group. It is possible that one of the luminaires in the group serves as a master and that the remaining luminaires serve as slaves.
  • said group is coupled to a mobile telecommunications network using ultra-high radio frequency, UHF for short.
  • only one luminaire of said group is directly coupled to the mobile
  • the luminaires need a fully equipped electronics unit and the other luminaires of the group can have a simplified electronics unit or can also use the electronics unit of the luminaire directly coupled to the mobile telecommunications network .
  • Figure 1 shows a schematic representation of an exemplary embodiment of a luminaire described here
  • FIGS. 2 to 5 show schematic set-ups of communication
  • Figure 6 shows schematic sectional views of exemplary embodiments of luminaires described here.
  • FIG 1 an exemplary embodiment of a luminaire 1 for Li- Fi communication is shown.
  • the luminaire 1 is configured as a streetlight.
  • the luminaire 1 comprises one or a plurality of optoelectronic semiconductor chips 2 to produce visible light L.
  • the optoelectronic semiconductor chips 2 to produce visible light L.
  • semiconductor chip 2 is configured to emit a first pulsed radiation S towards a participant 7. By the modulated first pulsed radiation S, data can be sent by the luminaire 1.
  • the optoelectronic semiconductor chip 2 is modulated via OFDM.
  • optoelectronic semiconductor chip 2 is carried out so fast that it cannot be recognized by the human eye.
  • a light source 6 to produce the visible light L. If such a light source 6 is present, it is possible that the optoelectronic semiconductor chip 2 is only there to produce the first pulsed radiation S to send data .
  • the luminaire 1 includes a photodetector 3 to detect a pulsed radiation R from the at least one participant 7, the second pulsed radiation R also contains optically coded data as well as the first pulsed radiation S.
  • the photodetector 3 is located at a pillar of the luminaire 1.
  • the optoelectronic semiconductor chip 2, the photodetector 3 and the optional light source 6 are
  • the luminaire 1 electrically coupled to and driven by an electronics unit 5 of the luminaire 1.
  • a data interface 4 by which the luminaire 1 receives data for example from a telecommunications network like the internet. Data received by the luminaire 1 can also be sent to the telecommunications network by means of the interface 4.
  • the data interface 4 is wire-based.
  • the data interface 4 can be wireless.
  • the luminaire 1 is configured as a base
  • the electronics unit 5 includes a base station controller BSC. Moreover, there can be a transceiver T and a multi-coupler M. To energize the optoelectronic semiconductor chip 2, there is preferably a power supply unit PSU and LED drivers D and/or LED combiners C. These components can be integrated in an integrated circuit or can exist as separate components mounted for example on a printed circuit board. Moreover, optimally these components are distributed over different parts of the luminaire 1 so that the electronics unit 5 does not need to be a single element.
  • Each luminaire 1 can be connected to a radio network controller RNC. Otherwise, the luminaires 1 are assembled in groups, wherein only one luminaire 1 of said group is connected to the RNC.
  • the network can be configured for example as a 3G network for voice and data transmission. This means that the RNC can be coupled to a mobile switching center MSC and/or to a serving GPRS support node SGSN. Further, there can be connections to a gateway mobile switching center GMSC and to a gateway GPRS support node GGSN. Moreover, there are connections to a public switched telephone network PSTN and the public internet PI.
  • FIG 3 it is illustrated that a plurality of luminaires 1 are arranged along a street 9. Each of the luminaires 1 has a distinct range in which it can receive data and can send data, thus forming cells 8.
  • the Li-Fi- capable luminaires 1 can replace a radiofrequency-based mobile communications network along the street 9 for
  • the luminaires 1 are located along a centerline of the street 9. This is not necessarily the case. As an alternative, the luminaires 1 can also be located along one or along two opposite sides of the street 9.
  • the luminaires 1 only cover a one dimensional range along the street 9. Contrary to that, in figure 4 it is shown that the luminaires 1 and, thus, the cells 8 form a two-dimensional network, for example along crossing streets. Moreover, not shown here, it is also possible that the cells 8 of the luminaires 1 cover a closed area in a two-dimensional manner, for example cover a large parking area completely with the cells 8.
  • the Li-Fi system covers a building 11. This is done for example by external light from the luminaire 1, which is a streetlight. Other than shown, in the building 11 itself there can be luminaires, too, to fully enable Li-Fi communication within the building 11. This is in particular possible in stairways facing a street.
  • FIG. 5B A similar configuration is shown in figure 5B, where the emphasis is on luminaires 1 within the building 11.
  • the optoelectronic semiconductor chips 2 are enclosed in a housing together with the photodetector 3.
  • the housing comprises a reflector side 13 and a light exit face 12.
  • the light exit face 12 can be equipped with lenses as an option.
  • electronics unit 5 and the data interface 4 are arranged in the proximity of the housing.
  • the optoelectronic semiconductor chips preferably comprise a semiconductor layer sequence in each case.
  • Said semiconductor layer sequence is preferably based on a III-V compound semiconductor material.
  • the semiconductor material is for example a nitride compound semiconductor material such as Al n In ] __ n-m Ga m N or a phosphide compound semiconductor material such as Al n In ] __ n-m Ga m P or also an arsenide compound
  • the semiconductor layer sequence may comprise dopants and additional constituents. For simplicity's sake, however, only the essential constituents of the crystal lattice of the semiconductor layer sequence are indicated, i.e. Al, As, Ga, In, N or P, even if these may in part be replaced and/or supplemented by small quantities of further substances.
  • the semiconductor layer sequence is particularly preferably based on the AlInGaN material system. The same can apply for all other exemplary embodiments.
  • the photodetector 3 is located at a pillar 14 of the luminaire 1.
  • the data interface 4 and the electronics unit 5 can be located at a base of the pillar 14.
  • the photodetector 3 is at quite a distance from the optoelectronic semiconductor chips 2.
  • the data interface 4 and the electronics unit 5 can be located within the pillar 14 at a bottom part of the pillar 14.
  • optoelectronic semiconductor chips 2 are to produce the first pulsed radiation S to send the data.
  • the light source 6 is also based on semiconductor components like LEDs.
  • the housing is of round shape.
  • the electronics unit 5 can be placed in an interior of the luminaire 1.
  • the photodetectors 3 are located at a bottom side of the housing.
  • the optoelectronic semiconductor chips 2 and the optional light source 6 are arranged at a top part of the housing in order to provide indirect lighting, for example in a building.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Optical Communication System (AREA)

Abstract

Dans un mode de réalisation, l'invention concerne un luminaire (1) qui comprend une puce de semi-conducteur optoélectronique (2) pour émettre un premier rayonnement pulsé (S), un photodétecteur pour détecter un second rayonnement pulsé (R), une interface de données filaire (4) pour recevoir et envoyer des données numériques avec un débit binaire d'au moins 1 Mbit/s et au moins une unité électronique (5) pour commander la puce de semi-conducteur optoélectronique (2) afin d'émettre le premier rayonnement pulsé (S) en fonction d'une entrée de données reçue au niveau de l'interface de données (4) et afin de convertir le second rayonnement pulsé détecté (R) en une sortie de données à envoyer à l'interface de données (4) de manière à réaliser une communication Li-Fi. Au moins 60 % de la consommation d'énergie moyenne du luminaire (1) est utilisée pour produire de la lumière visible qui semble être de luminosité constante à l'œil humain.
PCT/EP2017/082676 2017-12-13 2017-12-13 Luminaire et procédé de transfert de données sans fil à l'aide d'un tel luminaire Ceased WO2019114952A1 (fr)

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PCT/EP2017/082676 WO2019114952A1 (fr) 2017-12-13 2017-12-13 Luminaire et procédé de transfert de données sans fil à l'aide d'un tel luminaire

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