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1. 发明公开

US20240195227A1 WIRELESS POWER TRANSMISSION SYSTEM 审中-公开
公开(公告)号：US20240195227A1
公开(公告)日：2024-06-13
申请号：US18556203
申请日：2022-04-21
申请人： Wi-Charge Ltd.
发明人： Ori Refael Mor , Ortal Alpert , Nir Simon , Lior Golan
IPC分类号： H02J50/40 , H02J50/23 , H02J50/80 , H02J50/90
CPC分类号： H02J50/402 , H02J50/23 , H02J50/80 , H02J50/90
摘要： A system for safe transmission of an RF electromagnetic power beam to a receiver for conversion into electric power. The receiver has an antenna array for receiving the RF beam and electrical circuitry to receive a corresponding RF electrical current from the antenna array. The circuitry includes a converter for generating DC current from the RF electrical current, and includes at least one component that reflects part of the RF current back towards the antenna array. This converts the reflected portion of the RF electrical current into a retransmitted RF electromagnetic beam having the same frequency as the RF electromagnetic power beam, and is directed back towards the transmitter. The receiver monitors the reflected RF current, and transmits a proportional signal back to a controller. The controller reduces the transmitted power beam if its interference with the retransmitted beam would generate a field intensity above a safe level.

2. 发明公开

US20240195225A1 PHOTOVOLTAIC CELL FOR LASER BEAM POWER DETECTION 审中-公开
公开(公告)号：US20240195225A1
公开(公告)日：2024-06-13
申请号：US18421079
申请日：2024-01-24
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Ori Refael Mor , Lior Golan , Ran Sagi , Eyal Conforti
IPC分类号： H02J50/30 , H01L31/0216 , H01L31/054 , H02S40/30
CPC分类号： H02J50/30 , H01L31/02168 , H01L31/0547 , H02S40/30 , Y02E10/52
摘要： 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 eV, with a plurality of conductors on a beam 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.

3. 发明授权

US11855705B2 Distributed optical resonator with thin receiver unit 有权
公开(公告)号：US11855705B2
公开(公告)日：2023-12-26
申请号：US17203886
申请日：2021-03-17
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Yoni Cohen , Ori Refael Mor , Omer Nahmias , Eitan Ronen , Lior Golan
IPC分类号： H04B10/80 , H01S3/08 , H04B10/69
CPC分类号： H04B10/807 , H01S3/08 , H04B10/69
摘要： 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.

4. 发明申请

US20220368166A1 WIRELESS POWER TRANSMISSION SYSTEM WITH ADAPTIVE DYNAMIC SAFETY MANAGEMENT 有权
公开(公告)号：US20220368166A1
公开(公告)日：2022-11-17
申请号：US17773147
申请日：2020-11-01
申请人： Wi-Charge Ltd.
发明人： Lior Golan , Yoav Biderman , Ran Sagi , Ortal Alpert , Ori Refael Mor
IPC分类号： H02J50/30 , H02J50/60 , H02J50/80 , H04B10/80
摘要： Methods and systems for safely and effectively supplying a beam of wireless power from a transmitter to at least one receiver. A delta signal is generated by repeatedly calculating the difference in power between the power of the beam emitted by the transmitter and the amount of power received at the receiver. The system dynamically generates a time delay, which is a time period shorter than the maximal exposure duration relating to safe exposure durations for the power level of the delta signal. If the time delay is exceeded, the system changes an operational parameter of the system, such as terminating the beam. Because of limitations to building a perfect timing system, the system is built to be more sensitive to time delays having longer safe exposure durations, with large delta signals having short safe exposure durations being responded to immediately and without significant regard to the time delay.

5. 发明申请

US20220360116A1 WIRELESS POWER SYSTEM HAVING IDENTIFIABLE RECEIVERS 有权
公开(公告)号：US20220360116A1
公开(公告)日：2022-11-10
申请号：US17745359
申请日：2022-05-16
申请人： Wi-Charge Ltd.
发明人： Yoav Biderman , Ortal Alpert , Ori Refael Mor , Omer Nahmias , Lior Golan , Ran Sagi , Zohar Levin , Alexander Slepoy , Yan Rosh , Eyal Conforti
IPC分类号： H02J50/60 , H02J50/80 , H02J50/30 , H02J50/90
摘要： A wireless power transmitter system for directing a high energy beam towards receivers fitted with identifying signs. One type of the identifying signs may have asymmetric shape properties, such that their mirror image cannot be matched to their actual shape, even after the image is rotated, tilted or otherwise geometrically manipulated. The system can thus determine whether a detected image of a sign is a true image received directly from said receiver, or is received after the imaged beam has undergone a reflection between the receiver and the transmission system. In the latter case, the system can prevent high power transmission from being directed to a location other than a real receiver, which could be a safety hazard. Other types of identifying signs may be located in or on the borders of different zones of a transmission space, to identify zones where transmission may be allowed or prohibited.

6. 发明申请

US20210021093A1 DISTRIBUTED COUPLED RESONATOR LASER 有权
公开(公告)号：US20210021093A1
公开(公告)日：2021-01-21
申请号：US17034256
申请日：2020-09-28
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Eitan Ronen , Omer Nahmias , Ori Refael Mor , Lior Golan , Ran Sagi
IPC分类号： H01S3/082 , H01S3/08 , H01S3/105 , H01S3/081
摘要： A laser system involving coupled distributed resonators disposed serially, with the lasing gain medium located in the main resonator and the output of that resonator being directed into a free space resonator, such that the main resonator output mirror is effectively the free space resonator. The distributed resonators end mirrors are retroreflectors. Interference occurs between light traveling towards the remote mirror of the free space resonator and light reflected therefrom, generating regions of high reflectivity. The coupling of the free space resonator to the regions of high reflectivity of the free space resonator enables the first resonator to lase efficiently, even though the true reflectivity of the main resonator output mirror outside of those regions is insufficient to enable efficient lasing, if at all. This coupled resonator structure enables lasing to occur with a high field of view and the high gain engendered by the high reflectivity regions.

7. 发明授权

US10193297B2 Distributed coupled resonator laser 有权
公开(公告)号：US10193297B2
公开(公告)日：2019-01-29
申请号：US15548229
申请日：2016-02-02
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Eitan Ronen , Omer Nahmias , Ori Refael Mor , Lior Golan , Ran Sagi
IPC分类号： H01S3/08 , H01S3/082 , H01S3/081 , H01S3/06
摘要： A laser system involving coupled distributed resonators disposed serially, with the lasing gain medium located in the main resonator and the output of that resonator being directed into a free space resonator, such that the main resonator output mirror is effectively the free space resonator. The distributed resonators end mirrors are retroreflectors. Interference occurs between light traveling towards the remote mirror of the free space resonator and light reflected therefrom, generating regions of high reflectivity. The coupling of the free space resonator to the regions of high reflectivity of the free space resonator enables the first resonator to lase efficiently, even though the true reflectivity of the main resonator output mirror outside of those regions is insufficient to enable efficient lasing, if at all. This coupled resonator structure enables lasing to occur with a high field of view and the high gain engendered by the high reflectivity regions.

8. 发明授权

US09705606B2 Directional light transmitter and receiver 有权
公开(公告)号：US09705606B2
公开(公告)日：2017-07-11
申请号：US12088385
申请日：2006-09-27
申请人： Ortal Alpert
发明人： Ortal Alpert
IPC分类号： H04B10/00 , H04B10/80
CPC分类号： H04B10/807 , H04B10/1123 , H04B10/22
摘要： A system for supplying power wirelessly to a remote mobile device including (i) a transmitting unit for directing radiation into the region of the mobile device, the transmitting unit having a gain medium with a front surface directed towards the space, and a retroreflector on its back surface, and (ii) a receiver unit connected with or attached to the mobile device for receiving radiation transmitted from the transmitting unit. The receiver unit includes (i) a retroreflector for reflecting part of the radiation received from the transmitting unit back in the direction of the transmitting unit, where it is amplified and retransmitted back in the direction of the receiver unit, and (ii) a power detection element for absorbing that part of the radiation not reflected by the retroreflector, and converting it to electrical power for use by the mobile device. Modulation of the transmitted beam enables it to transmit data also.

9. 发明申请

US20140092929A1 LASER SYSTEM FOR POWER TRANSMISSION 有权
标题翻译：用于电力传输的激光系统
公开(公告)号：US20140092929A1
公开(公告)日：2014-04-03
申请号：US14016151
申请日：2013-09-02
申请人： WI-CHARGE LTD.
发明人： ORTAL ALPERT , RUDIGER PASCHOTTA
IPC分类号： H01S5/10
CPC分类号： H02J50/30 , H01S3/005 , H01S3/0604 , H01S3/0805 , H01S3/08059 , H01S3/08072 , H01S3/083 , H01S3/0941 , H01S3/1307 , H01S5/041 , H01S5/10 , H01S5/14 , H01S5/183 , H04B10/114 , H04B10/807 , H04B2001/0416
摘要： An optical power beam transmission systems, with a directional light transmitter and receiver. The transmitter contains an amplifying laser medium, and this together with a retroreflector in the receiver, forms a laser resonator. When lasing sets in, the receiver can extract optical power through an output coupler and convert it to electrical power. The gain medium may be a disc having a thickness substantially smaller than its lateral dimensions. The laser resonator is operated as a stable resonator to ensure safe operation. This is achieved by use of an adaptive optical element, for reducing the diameter of the energy beam impinging on the gain medium, thereby increasing the overlap between the energy beam and the gain medium. As the transmitter-receiver distance is changed, such as by movement of the receiver, the adaptive optical element focal length changes to ensure that the cavity remains within its stability zone.
摘要翻译：光功率光束传输系统，带有定向光发射器和接收器。发射机包含放大激光介质，并与接收机中的后向反射器一起形成激光谐振器。当激光投射时，接收器可以通过输出耦合器提取光功率并将其转换为电能。增益介质可以是具有基本上小于其横向尺寸的厚度的盘。激光谐振器作为稳定的谐振器运行，以确保安全运行。这通过使用自适应光学元件来实现，用于减小入射到增益介质上的能量束的直径，从而增加能量束和增益介质之间的重叠。随着发射器 - 接收器距离的改变，例如通过接收器的移动，自适应光学元件焦距变化，以确保空腔保持在其稳定区域内。

10. 发明授权

US11909224B2 Photovoltaic cell for laser beam power detection 有权
公开(公告)号：US11909224B2
公开(公告)日：2024-02-20
申请号：US17440809
申请日：2020-03-20
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Ori Refael Mor , Lior Golan , Ran Sagi , Eyal Conforti
IPC分类号： H02J50/30 , H01L31/054 , H02S40/30 , H01L31/0216
CPC分类号： H02J50/30 , H01L31/02168 , H01L31/0547 , H02S40/30 , Y02E10/52
摘要： 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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