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
• • 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
  • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
  • H04B10/806—Arrangements for feeding power

Definitions

• the present invention relates to the transmission of electrical power by optical means for supplying electrical energy to an electrical device.
• the invention applies to home appliances such as portable equipment, communicating clothing, sensors or actuators that often operate without battery, and any device containing a storage battery to be charged. These devices may not have an electrical cable or fiber optic cable connection for charging.
• 2 photovoltaics is of the order of 100 ⁇ W / cm.
• the recoverable power would be 5 mW. It would take a hundred times more power to power the mobile battery normally.
• photovoltaic panels mounted on mobile devices moving on a planet are powered by energy transmission via the beam of a sun-pumped laser in a device accumulation of fixed solar energy on a planet.
• This arrangement transmits energy over very long distances.
• Such devices are suitable for controlled professional use and require expensive materials.
• the optical energy transmission system according to the invention is intended for shorter distances at most of the order of a hundred meters between the electrical device and a transmitter whose energy to be transmitted must be adapted to the cells. of the electrical device, regardless of the user who is not a specialist.
• the invention is based on a transmission of light in the visible range, or the infrared or the ultraviolet, whose energy is recoverable by photovoltaic effect.
• the invention provides a method for transmitting energy for powering an electrical device optically from a power transmitter, the electrical device having a photoreceptor comprising positioning and concentrating a low power light beam emitted by the power transmitter on the photoreceptor and a power supply of the electrical device with a power of the light beam positioned and concentrated higher than the low power.
• the overall energy efficiency between the electrical energy received and resulting from the conversion of the light energy and the electrical energy supplied by the transmitter is optimized since the power transmitter emits the high power light beam only when the light beam is properly positioned and concentrated with respect to the photoreceptor, the concentration allowing a better energy balance.
• the invention facilitates the charging of the electrical device by eliminating the use of often heavy loader and often bulky electrical cables to connect to the electrical sector.
• the method comprises: initializing a parameter of a concentration optical system to a maximum value, so that the low power light beam has a maximum diameter, an activation of a mechanism for positioning the light beam on the photoreceptor of the electrical device, a stop of the positioning of the light beam on receipt of a signal of a simultaneous excitation of first photodetectors from the electrical device by the power transmitter, a decrementation of one step of the optical concentration system parameter to decrease the diameter of the light beam, and a reiteration of the previous three steps as long as the power transmitter does not receive a signal from the electrical device of a simultaneous deexcitation of the first photodetectors and simultaneous excitation of second photodetectors of the electrical device.
• the second photodetectors flank the photoreceptor and are framed by the first photodetectors on
• the light beam can be repositioned and reconcentrated upon receipt of one of the signals from the electrical device relating respectively to an excitation of at least one first photodetector and to a de-excitation of at least one second photodetector, the transmitter controlling a decrease in the power of the light beam until said beam is positioned and focused on the photoreceptor.
• a positioning of the light beam can be previously implemented according to the adjustment data relating to the electrical device and stored in the power transmitter.
• a setting of a parameter of an optical system for concentrating the light beam can be implemented beforehand according to the adjustment data relating to the electrical device and stored in the power transmitter so that the light beam of low power has a predetermined diameter.
• the energy required to charge the electrical device is optimized according to the invention by adjusting the transmission power of the light beam positioned and concentrated according to the receiving power of the photoreceptor during the power supply of the electrical device.
• the light output of the light beam is set according to the setting data of the electrical device and stored in the power transmitter.
• the method of the invention may comprise the transmission of a signal of end of power supply of the electrical device to the power transmitter in order to stop the emission of the light beam.
• the transmitter then goes into standby which allows better management of the power supplied to the electrical device by avoiding a significant residual consumption of the transmitter when the battery of the electrical device is loaded.
• the invention also relates to a power transmitter and an electrical device.
• the power transmitter transmits energy optically to the electrical device having a photoreceptor, and comprises: means for positioning and focusing a low power light beam emitted by the transmitter on the photoreceptor, and means for powering the electrical device with a power of the light beam positioned and concentrated higher than the low power.
• the electrical device comprises a photoreceptor, and comprises means for detecting a positioning and concentration of the low power light beam emitted by the transmitter on the photoreceptor, the photoreceptor then receiving the positioned and focused light beam with a higher power than the power weak to power the electrical device
• the invention relates to computer programs adapted to be implemented respectively in the power transmitter and the electrical device and comprising instructions for transmitting energy according to the method of the invention.
• FIG. 1 is a schematic block diagram of a power transmission system comprising an electrical device and a power transmitter according to the invention
• FIG. 2 is a schematic block diagram representative of a face of the electrical device according to the invention comprising a photoreceptor; - Figures 3 and 4 are respectively a front view and a section taken along the line IV-IV of Figure 3 of a light beam positioning mechanism produced by the transmitter according to the invention; FIG. 5 is an algorithm of the optical energy transmission method according to the invention between the power transmitter and the electrical device whose battery is to be charged; and
• FIG. 6 is a schematic front view of a clothing communicating as an electrical device on a hanger with a power transmitter optically.
• an optical transmission system comprises at least one electrical device DE whose accumulator battery is to be charged and a power transmitter T transmitting light energy to the device DE electric via a FL light beam for a predefined time or not.
• the electrical device DE and the power transmitter T are represented in the form of functional blocks, most of which provide functions relating to the invention and may correspond to software and / or hardware modules.
• the electrical device DE comprises a photoreceptor PR and photodetectors PD1 and PD2 described in more detail with reference to FIG. 2, and an electric battery BI connected to the photoreceptor.
• the device DE also comprises an ICD communication interface, a presence transmitter EP and a memory MED.
• the elements PR, BI, ICD, EP and MED of the device DE are connected and controlled by a central processing unit CPUD.
• Other elements specific to the normal operation of the electric device DE, such as a mobile radio, are not shown in Figure 1 so as not to overload.
• the central processing unit CPUD of the electrical device DE transmits MS messages to the transmitter T and receives them via the communication interface ICD.
• the ICD communication interface is optronic and the MS messages are transmitted optically, also called light path, between the device DE and the transmitter T and are carried in light signals SmD, SmT.
• the ICD communication interface comprises a light source such as a LED light emitting diode for emitting a light signal SmD including messages MS to the transmitter T, and a photosensitive element such as a photodiode for receiving a light signal SmT including MS messages transmitted by the transmitter T.
• the LED can emit radiation in the visible range or infrared or ultraviolet.
• the signal SmD, SmT is modulated in frequency, amplitude or phase.
• the electrical device DE then has a modulation-demodulation unit MDD for modulating the light signal SmD before it is transmitted to the transmitter T and demodulating the light signal SmT transmitted by the transmitter T.
• the ICD communication interface comprises a radio transmitter and a short-range radio receiver, for example.
• a radio transmitter for example for wireless link type Bluetooth, WIFI (802.11.x), or ZigBee (802.15.4), and SmD and SmT signals are radio signals.
• the presence transmitter EP may or may not be integrated in the ICD communication interface. It comprises, for example, a LED emitting diode activated by the central processing unit CPUD, in particular to signal by sending a light signal Sp the presence of the electric device DE to a transmitter T nearby when the level of BI battery power of the DE device is deemed low. At the end of charging the battery, the presence transmitter EP emits an end of charge signal Sf to the transmitter T. In order to discriminate the ambient light and the presence and end of charge signals Sp and Sf, these are also modulated by a UM modulation unit.
• the presence transmitter EP is a short range radio transmitter, for example wireless link type Bluetooth, WIFI or ZigBee, and the signals Sp and Sf are radio signals.
• the memory MED is for example a ROM-type memory and notably comprises an identifier ID of the electrical device DE.
• the MED memory may also include other data specific to the normal operation of the DE device.
• the photoreceptor PR is a photovoltaic current generator adapted to the radiation of the light source of the transmitter T.
• the photoreceptor PR comprises a cell or a panel of several photovoltaic cells C1 to CN.
• N 9 photovoltaic cells were arranged close to each other and constituted a rectangular assembly substantially centered on one face of the housing of the electric device DE.
• the photovoltaic cells convert the light output provided by the light beam FL of the transmitter T into electrical power to be supplied to the battery BI.
• the photovoltaic cells are, for example, crystalline silicon cells with a sensitivity of 0.75 A / W at a voltage of 0.4 volts in the infrared range.
• the photodetectors PD are for example photodiodes and serve to automatically center the light source of the transmitter T on the photoreceptor PR. They are at least two first photodetectors and two second photodetectors for correctly positioning and concentrating the power light beam FL emitted by the transmitter T and directed towards the photovoltaic cells C1 to CN of the photoreceptor PR so as to maximize the received power. According to the embodiment illustrated in FIG. 2, four first photodetectors PD1 and four second photodetectors PD2 are fixed on the face of the housing of the electric device DE. The photodetectors PD1 frame the rectangular assembly of the photovoltaic cells C1 to CN and are substantially centered on the diagonals of the rectangular assembly.
• the second photodetectors PD2 close the rectangular array of photovoltaic cells C1 to CN and are substantially centered on the axes of the rectangular assembly and at the vertices of a diamond inscribed in the rectangle on the vertices of which the first photodetectors PD1 are substantially centered. According to one embodiment of the invention, all the elements necessary for supplying the battery BI are an integral part of the electrical device DE.
• the photoreceptor PR as well as the communication interface ICD and the presence transmitter EP are implanted on a removable medium, such as a cover or an envelope, which can be connected to the charging terminals of the electrical device DE.
• the electrical device DE may be a mobile radio, a laptop, a personal digital assistant PDA, or a portable terminal or not as a video game console or a smart TV receiver.
• the electrical device can also be a home automation device such as portable equipment, a communicating garment, sensors, actuators, or any other device containing an internal battery to be charged.
• the electrical device does not require any electrical or optical cable connection to be powered by the transmitter T.
• any electrical device according to the invention comprises a consumption profile that is specific to it according to its intermittent or continuous operation and according to the power used weak or elevated during operation.
• the power transmitter T comprises a light source SL and an adjustable power supply circuit CAR connected to the light source SL in order to provide it with an adjustable electric power.
• the transmitter T also comprises a device MP-CO light source adjustment system, ICT communication interface, DP presence detector and MET memory.
• the elements SL, CAR, MP-CO, ICT, DP and MET of the transmitter T are connected and controlled by a central processing unit CPUT.
• the CAR supply circuit is connected to the mains.
• the circuit CAR comprises an autonomous power supply.
• the circuit CAR regulates the electrical power to be supplied to the light source SL according to the consumption profile of the electrical device DE and the type and number of photovoltaic cells C1 to CN of the photoreceptor PR in order to adapt the emission of the light beam to a power output for a maximum RM efficiency between the supply of the light source SL and the electrical output of the photoreceptor.
• the light source SL converts the electric power supplied into a light power to the device DE in the form of the light beam FL.
• the light beam FL is an infrared beam so that it is not visible and disturbing in a dark room.
• the emitted beam FL is in the visible or ultraviolet range.
• the light source SL may comprise a laser, a light emitting diode, a light emitting diode, a filament bulb or a fluorescent tube.
• a modulation unit UMT modulates the beam FL in frequency, amplitude or phase.
• the MP-CO adjusts the light beam FL of the source SL as a function of the photoreceptor PR and comprises a positioning mechanism MP and a CO concentration optical system of the SL source.
• the MP-CO When positioning and concentrating the light source SL, it produces a light beam of low power so as not to risk damaging entities placed near the electrical device or to create eye damage to people close to the light source. light bleam.
• the positioning mechanism MP directs the low power light beam FL produced by the light source SL towards the photoreceptor PR of the device DE so that all the photodetectors PD1 and PD2 are excited.
• the positioning mechanism MP moves the optical axis of the light source SL along a cycloid of the light beam FL, and comprises a pinion P1 rotated by a motor Mt, a full gear RD and a ring gear CD.
• the ring gear rotates freely about an axis parallel to the axis of the motor and has an external toothing meshing with the motor pinion PI and an internal toothing meshing with the RD wheel.
• an eccentric circular opening Gold which is crossed by a tube Tb of diameter less than the diameter of the opening.
• One end of the tube Tb can pivot on a pivot Pv fixed in the transmitter housing T.
• the other end of the tube supports the light source SL.
• Source SL luminaire attached to one end of the tube Tb describes a cycloid whose diameter is significantly greater than the largest dimension of the PR photoreceptor cell assembly and sweeps a planar circular surface concentric to the ring gear CD.
• the spot of the light beam FL describes a cycloidal closed curve on the face of the electric device DE comprising the surface of the photoreceptor PR.
• the processing unit CPUT controls the stopping of the engine Mt when the beam FL covers the photoreceptor PR at best, that is to say when all the first photodetectors PD1 are excited.
• the motor pinion PI and the driven ring gear CD are replaced by any known drive means such as a toothed belt cooperating with drive and driven pulleys or a chain cooperating with the drive pinions. and led.
• the positioning mechanism MP is a micrometric stage supporting the light source SL.
• the plate is movable along two axes orthogonal to each other and to the optical axis of the light source SL and each provided with two end-of-travel detectors.
• the plate is for example zigzagged so that the spot of the light beam FL sweeps the face of the electric device DE having the surface of the photoreceptor PR.
• one solution is to pivot in the transmitter T at one end of a tube at the other end of which is fixed the source SL.
• the micrometric stage moves a short distance an intermediate portion of the tube between its ends along the two orthogonal axes so that the light source is moved over a greater distance.
• the optical concentrating system CO for example by collimation or focusing is placed in front of the light source SL and has a variable focal length by focusing and / or a variable opening by collimation.
• the diameter of the spot of the light beam FL varies until only the second photodetectors PD2 are excited.
• the transmitter CPUT processing unit transmits and receives MS messages via the ICT communication interface communicating with the communication interface ICD of the electrical device DE.
• the ICT communication interface is analogous to that ICD of the electrical device DE.
• the ICT communication interface then comprises, for example, an LED light emitting diode for emitting a light signal SmT including the messages MS to the device DE, and a photodiode for receiving the light signal SmD including messages MS emitted by the device DE.
• the light-emitting diode can emit radiation in the visible or infrared or ultraviolet range.
• the transmitter T comprises a modulation-demodulation unit MDT analogous to the unit MDD for modulating the light signal SmT before it is transmitted to the device DE and demodulating the light signal SmD transmitted by the device DE, in order to discriminate SmD and SmT light signals and ambient light.
• a modulation-demodulation unit MDT analogous to the unit MDD for modulating the light signal SmT before it is transmitted to the device DE and demodulating the light signal SmD transmitted by the device DE, in order to discriminate SmD and SmT light signals and ambient light.
• the ICT communication interface comprises a radio transmitter and a short-range radio receiver, and the SmD and SmT signals are radio signals.
• the presence detector DP of the transmitter T is connected to a demodulation unit DM.
• the DP detector and the DM unit are complementary to the presence transmitter EP and the demodulation unit UM in the electrical device DE and detect the presence signal Sp or the end of charge signal Sf and inform the unit CPUT which activates or deactivates the emission of the light beam FL.
• the transmitter MET memory T is for example a ROM-type memory and includes IDk identifiers of electrical devices matched to Rgk adjustment data relating to electrical devices.
• the setting data relating to the device DE depend on the consumption profile of the battery BI and are in particular position coordinates of the light source SL and at least the value of a parameter, such as a focal length or an aperture, of the light source. optical system of concentration fixed or included in predetermined intervals, and a level of light power to be supplied to the electric device DE adapted to the type and to the number of photovoltaic cells of the photoreceptor PR.
• the method for transmitting energy optically from the power transmitter T to the electrical device DE comprises steps E1 to E12.
• step E1 the power transmitter T is on standby as long as no electrical device indicates its presence.
• step E2 in the electrical device DE the central processing unit CPUD compares the charge level Nc, such as the charging voltage, of the battery BI to a low load threshold Scf. If the level Nc is below the threshold Scf, the central processing unit CPUD activates the presence transmitter EP so that the latter transmits a presence signal Sp to the presence detector DP of the transmitter T, in step E3.
• the central processing unit CPUD monitors the excitation of at least PDL photodetectors.
• step E2 if the charge level Nc of the battery BI is very low, the battery is out of use and the user of the device DE manually activates the sending of the presence signal Sp by the presence transmitter EP, for example by pressing a push button placed on the device DE and connecting the transmitter EP to the battery.
• the reception of the presence signal Sp by the presence detector DP in step E3 awakens the processing unit CPUT in the transmitter T whose LED in the ICT interface or the light source SL emits a light spot so that the user puts the photoreceptor PR and the light source SL roughly face to face.
• the transmission unit CPUT of the transmitter T activates the supply circuit CAR which regulates the electric power W at a low power Wf applied to the light source SL to position and concentrating the light beam FL towards the photovoltaic cells C1 to CN of the photoreceptor PR.
• the light source SL converts the electric power applied into a light power transmitted by the beam FL to the photoreceptor PR of the device DE.
• step E4 the transmitter's CPUT processing unit activates the positioning mechanism MP and the optical focusing system CO, and controls at least one optical parameter po at a poM value such as the focal length or the aperture of collimation of the CO concentration system so that the FL beam has a maximum diameter.
• step E5 the photoreceptor PR of the electrical device DE receives the beam FL of low power.
• the central processing unit CPUD of the device DE establishes a message MS1 indicating that the light source SL is correctly positioned.
• the established message MS1 is included in a light signal SmD transmitted by the communication interface ICD to the communication interface ICT of the transmitter T, in step E6.
• the processing unit CPUT of the transmitter T Upon reception of the message MS1, the processing unit CPUT of the transmitter T stops the positioning mechanism MP and varies the parameter po of the concentration system CO, for example by decrementing it by a step ⁇ po, so that the diameter of the spot of the light beam FL on the face of the DE device containing the photoreceptor PR decreases.
• the device DE transmits a second message MS2 to the communication interface ICT , to that the processing unit CPUT of the transmitter T reactivates the positioning mechanism MP, in step E8.
• the established message MS2 is included in a signal SmD transmitted by the communication interface ICD to the communication interface ICT of the transmitter T. As long as all the photodetectors PD1 are not de-excited by the beam FL and all the photodetectors PD2 are not excited simultaneously by the FL beam, the method loops from step E8 to step E5.
• step E7 in the opposite case, the spot of the beam FL is concentrated on the cells of the photoreceptor PR.
• step E9 the simultaneous excitation of the photodetectors PD2 simultaneously with the de-excitation of the photodetectors PD1 is interpreted by the central processing unit CPUD to establish a third message MS3 signaling that the light source is correctly focused on the photoreceptor.
• the established message MS3 is included in a signal SmD transmitted by the communication interface ICD to the communication interface ICT of the transmitter T.
• the processing unit CPUT of the transmitter T controls the supply circuit CAR the increase of the electric power W to a high power We for the full charge of the battery BI of the electric device DE.
• the light source SL converts the high electric power into a high light output transmitted by the beam FL to the photoreceptor PR.
• step ElO the photoreceptor PR receives the power of the light beam FL and compares it with the power output of the cells C1 to CN.
• step EI1 if the cells do not operate at maximum efficiency RM, the central processing unit CPUD establishes a fourth message MS4 requesting an increase or decrease ⁇ w of the light emission power.
• the established message MS4 is included in a signal SmD transmitted by the communication interface ICD to the communication interface ICT of the transmitter T.
• the processing unit CPUT of the transmitter controls the circuit of the transmitter. CAR power supply to increase or decrease the transmission power W of ⁇ w.
• the transmit power can be adjusted by a dichotomous method according to which, as long as the reception power of the beam FL does not correspond to the useful power of the cells C1 to CN, the steps E10 and E11 are executed.
• step E12 the central processing unit CPUD of the device DE compares the charge level Nc to a full charge threshold Spc corresponding to the end of the charging of the battery BI. As soon as the level Nc is greater than the threshold Spc, the central processing unit CPUD transmits via the presence transmitter EP an end of charge signal Sf to be transmitted to the presence detector DP. As a variant, the end of charge signal is replaced by an MS message indicating the end of the charge of the battery to be transmitted in a SmD signal by the communication interface ICD to the communication interface ICT of the transmitter.
• the processing unit CPUT of the transmitter T Upon reception of the end of charge signal Sf in step E13, the processing unit CPUT of the transmitter T commands the circuit CAR to stop supplying the source SL and puts the transmitter T until an electrical device transmits a presence signal.
• the transmitter's CPUT processing unit reactivates the MP-CO light source adjusting device so that the beam bright FL is directed on the cells C1 to CN.
• the CPUT unit can control the circuit CAR to reduce the power to provide W at a low power.
• the unit CPUT controls the increase of the power W at a high power.
• the central processing unit CPUD of the electrical device DE reads the identifier ID in the memory MED and introduces it into a message MS transmitted by the communication interface ICD, in addition or instead of the presence signal Sp by the presence transmitter EP.
• the processing unit CPUT searches the memory MET for the setting data associated with the transmitted identifier ID.
• the associated adjustment data correspond in particular to the position coordinates of the light source SL used by the positioning mechanism MP and a parameter, such as a focal length or a collimation aperture, of the optical concentration system CO, and / or to the power level W to be supplied by the circuit CAR corresponding to the power level of the photovoltaic cells C1 to CN of the device DE.
• These adjustment data are prerecorded in the memory MET or are stored after a first supply of the device DE by the transmitter T.
• the processing unit CPUT controls a first positioning of the light source SL according to the coordinates stored in the memory MET.
• step E9 the processing unit CPUT controls the circuit CAR the adjustment of the electric power W according to that designated by the identifier ID in the memory MET, this adjustment being refined to the steps ElO and EIl.
• the position coordinates of the light source and the value of the refined concentration system parameter and the modified electrical power are stored in association with the ID of the device DE in the memory MET and replace the previous adjustment data.
• the transmitter T manages the charging of several electrical devices arranged indifferently in a room, such as wireless sensors to be regularly charged with energy.
• the adjustment data matched to each electrical device also includes a charging time of the battery or a capacitor of said device. and a discharge time therefrom.
• the transmitter's CPUT processing unit determines a scheduling for successively powering the electrical devices, several devices located close to each other can be loaded simultaneously by the transmitter T.
• several transmitters cooperate to charge a set of electrical devices indifferently arranged in a room. If the maximum light output emitted by a first transmitter to one or more electrical devices is not sufficient, a second transmitter can also emit light power to this or these devices according to the power to be completed.
• the transmitters exchange messages via light signals modulated to a frequency, amplitude or phase specific to the transmitters.
• a transmitter comprising a laser or a light-emitting diode may be associated with a security system that momentarily interrupts the emission of the light beam when an intrusion into a delimited zone comprising the transmitter and the electrical device is detected.
• the security system may include presence sensors.
• the intrusion zone is the zone of access to the part containing the transmitter or transmitters and the electrical device or devices, and the security system is activated when the access zone, such as a door from the room, is open.
• Another embodiment of a security system is capable of automatically reducing the power of the light beam to a safety power, for example linked to the low electric power Wf, as soon as one of the second photodetectors PD2 detects plus the light beam.
• a safety power for example linked to the low electric power Wf
• Mirrors may be appropriately placed in the room to reflect the light beam and the light signals when the transmitter T and the electrical device DE are located in areas that are not in line of sight.
• the electric device DE When the electric device DE is manually set by a user in front of the transmitter T, it includes a temporary lighting module of the charging area to help place the electrical device.
• This module such as a second light source of low power contiguous to the source SL, can be activated when the presence detector DP receives the presence signal Sp emitted by the transmitter EP of the device DE, and deactivated during positioning and the concentration of the light source SL.
• the transmitter T is fixed at the reflector of a desk lamp and adapted to the shape thereof.
• the desk lamp foot has a notch or marking of an area for positioning the electrical device DE, such as a laptop or mobile terminal, and for substantially aligning the light source SL and the photoreceptor PR.
• the DE device When charging, the DE device also benefits from the light of the desk lamp.
• the computer may be an electronic device or object of personal telecommunication to the user of the method, for example a personal digital assistant communicating PDA.
• the electrical device can also be any other terminal or device or portable instrument or not such as a video game console, a smart TV receiver, a mouse, a keyboard, a razor or a measuring device, a rechargeable flashlight .
• the power transmitter T is a radio that transmits light signals carrying a digital acoustic signal to a sound reproduction device with a speaker. These light signals are transmitted between the ICT and ICD communication interfaces respectively of the radio station and the sound reproduction device.
• the light source of the radio station simultaneously emits a light beam FL to the photoreceptor PR of the device in order to charge the battery of the latter.
• No cable connection connects the radio to the sound device. Only the radio is connected to the mains. The energy transport and acoustic signal transport to the sound reproduction device can be combined in the light beam FL.
• the electrical device DE is a communicating garment and the transmitter T is a triangular-shaped plexi-ice CI hanger, or a coat hanger that can be connected to the sector. electric through a transformer.
• the photoreceptor PR comprises flexible panels of photovoltaic cells. These flexible panels of cells and photodetectors PD1 and PD2 are placed inside the garment, for example under and near one of the shoulders, or distributed under both shoulders.
• the power transmitter T is suspended from the bar of the CI hanger and the light source SL is directed towards the hook of the hanger to illuminate the photoreceptor PR and the photodetectors PD1 and PD2.
• the communicating garment and the hanger are replaced by a communicating shoe and a shape.
• the invention described herein relates to a method and a system for transmitting energy optically from a power transmitter T to an electric device DE to be loaded.
• the steps of the method of the invention are determined by the computer program instructions incorporated in the electrical device and in the transmitter.
• the programs include instructions which, when said programs are executed in the processing units of the electrical device and the transmitter whose operation is then controlled by the execution of the programs, carry out the steps of the method according to the invention.
• the invention also applies to computer programs, in particular computer programs recorded on or in a computer-readable information carrier and any data processing device, adapted to implement the computer. 'invention. These programs can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code such as in a partially compiled form, or in any other form desirable to implement the process according to the invention.
• the information carrier may be any entity or device capable of storing programs.
• the medium may comprise storage means or recording medium on which the computer programs according to the invention are recorded, such as a ROM, for example a CD ROM or a microelectronic circuit ROM, or a USB key, or a magnetic recording means, for example a floppy disk or a hard disk.
• the information medium may be a transmissible medium such as an electrical or optical signal, which may be conveyed via an electrical or optical cable, by radio or by other means.
• the programs according to the invention may in particular be downloaded on an Internet-type network.
• the information carrier may be an integrated circuit in which the programs are incorporated, the circuit being adapted to execute or to be used in the execution of the method according to the invention.

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Optical Communication System (AREA)
• Charge And Discharge Circuits For Batteries Or The Like (AREA)

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• 2007
  • 2007-12-11 WO PCT/FR2007/052484 patent/WO2008081138A2/fr active Application Filing
  • 2007-12-11 EP EP07871914A patent/EP2097996A2/de not_active Withdrawn

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