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公开(公告)号：US20240413667A1
公开(公告)日：2024-12-12
申请号：US18697575
申请日：2022-09-30
Applicant: Wi-Charge Ltd.
Inventor： Hen Markovitch , Ilanit Shapir , Lior Golan , Zohar Levin , Omer Nahmias , Yan Rosh , Alexander Slepoy , Ortal Alpert
Abstract: A wireless power transmitter for powering a remote receiver using a laser beam, the laser beam generator having current inputs and outputs electrically insulated from their surroundings, and each including a separate controlled gated switch. The transmitter has a beam adjustment element for switching the beam between a collimated beam for power transfer, and a more divergent beam for scanning, which is performed by a beam deflector. A detection system detect the presence of a receiver, and is used to ensure accurate beam impingement on the power receiving element. A controller senses when the beam is centered on the power receiving element, switches from the divergent scanning beam to the collimated beam, and instructs the beam generator to raise the power of the laser beam to a level for powering the receiver. The gate controller operates at a higher voltage than the other system control circuits.
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公开(公告)号：US11909224B2
公开(公告)日：2024-02-20
申请号：US17440809
申请日：2020-03-20
Applicant: Wi-Charge Ltd.
Inventor： Ortal Alpert , Ori Refael Mor , Lior Golan , Ran Sagi , Eyal Conforti
IPC: H02J50/30 , H01L31/054 , H02S40/30 , H01L31/0216
CPC classification number: H02J50/30 , H01L31/02168 , H01L31/0547 , H02S40/30 , Y02E10/52
Abstract: A wireless optical power transmission system comprising a transmitter and receiver, the transmitter comprising a laser emitting a beam, a scanning mirror for steering the beam towards said receiver and a control unit receiving signals from a detection unit on the receiver and controlling the beam power and the scanning mirror. The receiver has a photovoltaic cell having a bandgap energy of 0.75-1.2 e V, with a plurality of conductors on abeam receiving surface. A cover layer of material blocking illumination of wavelengths outside that of the laser, is disposed on the photovoltaic cell. The cover layer may have anti-reflective coatings on its top and bottom surfaces. The detection unit thus generates a signal representing the power of the laser beam impinging upon the receiver, independent of illuminations other than that of said laser beam. The control unit thus can maintain the laser power impinging on the receiver.
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公开(公告)号：US11722226B2
公开(公告)日：2023-08-08
申请号：US17378218
申请日：2021-07-16
Applicant: Wi-Charge Ltd.
Inventor： Ortal Alpert , Lior Golan , Ori Refael Mor , Ran Sagi , Omer Nahmias , Yoram Ashush , Yoav Biderman , Zohar Mills-Levin , Yan Rosh , Eyal Conforti
CPC classification number: H04B10/807 , H02J7/02 , H02J50/30
Abstract: A fail-safe wireless power transmission system having a transmitter, a receiver, a receiver functionality monitor unit, a transmitter functionality monitor unit and at least two sensors. The transmitter has at least one low emission state, and at least one high emission state, the high emission states having higher emissions and more complex safety systems. The transmitter may be precluded from switching from a low emission state to any high emission states upon detection of a receiver control unit malfunction, a transmitter control unit malfunction, a likelihood of human-accessible emission from the system greater than a predetermined level, or an inconsistency between results arising from at least two of the sensors. Two different methods of such preclusion may be used simultaneously or consecutively to improve reliability. A transmitter control unit analyzes data from the sensors, and performs calculations to determine if and what type of preclusion is needed.
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公开(公告)号：US11527919B2
公开(公告)日：2022-12-13
申请号：US17668612
申请日：2022-02-10
Applicant: Wi-Charge Ltd.
Inventor： Alexander Slepoy , Ori Refael Mor , Ortal Alpert , Lior Golan , Omer Nahmias , Victor Vaisleib
Abstract: A system for optical wireless power transmission to a power receiving apparatus generally situated in a mobile electronic device. The transmitter has an optical resonator with end reflectors and a gain medium positioned between them, such that an optical beam is generated. The frequency of the beam is selected such that it is absorbed by almost all transparent organic materials in general use. A beam steering unit on the transmitter can direct the beam in any of a plurality of directions, and the beam is absorbed on the receiver by means of an optical-to-electrical power converter, through a low reflection surface. The band gap of this power converter is selected to be smaller than that of the gain medium. The receiver has a voltage converter including an inductor, an energy storage device and a switch. A beam steerer controller ensures that the beam impinges on the receiver.
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公开(公告)号：US20220311521A1
公开(公告)日：2022-09-29
申请号：US17832233
申请日：2022-06-03
Applicant: Wi-Charge Ltd.
Inventor： Lior GOLAN , Alexander SLEPOY , Omer NAHMIAS , Ran SAGI , Ortal ALPERT , Ori Refael MOR
IPC: H04B10/80 , H02J50/60 , H01S3/00 , H01S3/042 , H01S3/09 , H01S3/13 , H01S3/16 , H01S5/00 , H01S5/024 , H01S5/042 , H01S5/0683 , H01S5/34 , H02J50/30
Abstract: A system incorporating safety features, for optical power transmission to receivers, comprising an optical resonator having end reflectors and a gain medium, a driver supplying power to the gain medium, and controlling its small signal gain, a beam steering apparatus and a controller to control at least the beam steering apparatus and the driver. The controller responds to a safety risk occurring in the system, by outputting a command to change at least some of the small signal gain of the gain medium, the radiance of the optical beam, the power supplied by the driver, the scan speed or the scan direction and position of the beam steering apparatus, or to register the scan pose which defines the location of said optical-to-electrical power converter. The controller may also ensure a high overall radiance efficiency, and may warn of transmitted power not received by a targeted receiver.
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Patent Agency Ranking
公开(公告)号：US20220190649A1
公开(公告)日：2022-06-16
申请号：US17440809
申请日：2020-03-20
Applicant: Wi-Charge Ltd.
Inventor： Ortal Alpert , Ori Refael Mor , Lior Golan , Ran Sagi , Eyal Conforti
IPC: H02J50/30 , H02S40/30 , H01L31/0216 , H01L31/054
Abstract: A wireless optical power transmission system comprising a transmitter and receiver, the transmitter comprising a laser emitting a beam, a scanning mirror for steering the beam towards said receiver and a control unit receiving signals from a detection unit on the receiver and controlling the beam power and the scanning mirror. The receiver has a photovoltaic cell having a bandgap energy of 0.75-1.2 e V, with a plurality of conductors on abeam receiving surface. A cover layer of material blocking illumination of wavelengths outside that of the laser, is disposed on the photovoltaic cell. The cover layer may have anti-reflective coatings on its top and bottom surfaces. The detection unit thus generates a signal representing the power of the laser beam impinging upon the receiver, independent of illuminations other than that of said laser beam. The control unit thus can maintain the laser power impinging on the receiver.
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公开(公告)号：US20220123601A1
公开(公告)日：2022-04-21
申请号：US17423802
申请日：2020-01-17
Applicant: Wi-Charge Ltd.
Inventor： Ortal Alpert , Yoav Biderman , Ori Mor , Omer Nahmias , Lior Golan , Ran Sagi , Zohar Levin , Alexander Slepoy , Yan Rosh , Eyal Conforti
Abstract: A system for ensuring the integrity of the enclosure of a wireless power transmitter. The enclosure of the transmitter comprises a window in order to allow a high-power beam to exit the transmitter. The window is equipped with an area which reflects at least a portion of the beam, and directs the reflected beam onto a detector. Thus the system can ascertain whether the window is undamaged, since if the detector is receiving a satisfactory portion of the beam, then it is indicative of an undamaged window. This advantageously prevents dangerous beam generated damage which may be caused if the exit window of the transmitter is damaged. The laser beam is preferably circularly polarized before exiting the transmitter to prevent dangerous laser damage caused by the reflections of the maximum of the P or S polarization components, which may occur with linearly polarized beams.
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公开(公告)号：US20210344427A1
公开(公告)日：2021-11-04
申请号：US17378218
申请日：2021-07-16
Applicant: Wi-Charge Ltd.
Inventor： Ortal Alpert , Lior Golan , Ori Refael Mor , Ran Sagi , Omer Nahmias , Yoram Ashush , Yoav Biderman , Zohar Mills-Levin , Yan Rosh , Eyal Conforti
Abstract: A fail-safe wireless power transmission system having a transmitter, a receiver, a receiver functionality monitor unit, a transmitter functionality monitor unit and at least two sensors. The transmitter has at least one low emission state, and at least one high emission state, the high emission states having higher emissions and more complex safety systems. The transmitter may be precluded from switching from a low emission state to any high emission states upon detection of a receiver control unit malfunction, a transmitter control unit malfunction, a likelihood of human-accessible emission from the system greater than a predetermined level, or an inconsistency between results arising from at least two of the sensors. Two different methods of such preclusion may be used simultaneously or consecutively to improve reliability. A transmitter control unit analyzes data from the sensors, and performs calculations to determine if and what type of preclusion is needed.
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公开(公告)号：US11095166B2
公开(公告)日：2021-08-17
申请号：US16959537
申请日：2019-01-02
Applicant: Wi-Charge Ltd.
Inventor： Yoav Biderman , Ortal Alpert , Omer Nahmias , Lior Golan , Ran Sagi , Zohar Levin , Ori Mor , Alexander Slepoy , Yan Rosh , Eyal Conforti
Abstract: A system for transmitting wireless power from multiple sources to multiple receivers, in which the safety of the system is maintained in spite of the possibility that two beams may intersect in the transmission space, thereby generating power or power density levels which exceed those at which the safety mechanisms of the system were designed to operate. The paths of the beams are known from the transmission positions and directions, and from the positions and orientations of the receivers, as measured by positioning devices on them. When an intersection, or near intersection of beams is determined, the system is triggered to reduce the safety risk by attenuating or turning off, or by diverting, one or more of the beams. In addition, since a reflected beam's path may not be readily discernable, the system can ascertain if one of the beams has undergone a reflection, by looking for displayed mirror images.
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公开(公告)号：US10958357B2
公开(公告)日：2021-03-23
申请号：US16658292
申请日：2019-10-21
Applicant: Wi-Charge Ltd.
Inventor： Ortal Alpert , Yoni Cohen , Ori Refael Mor , Omer Nahmias , Eitan Ronen , Lior Golan
Abstract: A receiver for receiving an incident beam of optical power from a remote transmitter over a predefined field of view, comprising an input lens having a high durability coating that can withstand domestic handling and contamination. Such a high durability coating may reflect a non-insignificant part of the light incident thereon. Behind the lens, there is fitted a retroreflector disposed such that it reflects that part of the incident beam traversing the lens, back through the lens to the transmitter. Reflections from the front surface of the lens impinge on one or more transparent beam catchers appropriately located, and equipped with energy conversion devices, such as photovoltaic cells, to convert light from the reflections of the incident beam into electricity. Additional energy conversion devices may be located inward of the lens, to collect and convert reflections from the inner surface of the lens, of light returning from the retroreflector.
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