Wireless power transmission
First Claim
1. A method for transmitting power wirelessly in a system that comprises a power transmitter and at least one power receiver, the power transmitter comprising a light source, means for directing the light emitted by the light source in a desired direction, and, means for controlling the intensity of the light emitted by the light source, and the power receiver comprising a photo-detector for receiving emitted light and for converting it into electric current, the method comprising transmitting with the light source of the power transmitter a substantially parallel light, the intensity of which is substantially less than the allowed maximum eye exposure, detecting by the photo-detector of the power receiver the light emitted by the light source, determining the integrity of the light beam emitted by the light source and detected by the photo-detector, transmitting a control signal is transmitted from the power receiver to the power transmitter in response to finding the light beam intact, and increasing the intensity of the light transmitted by the light source of the power transmitter in response to receiving said control signal from the power receiver concerning the integrity of the light beam.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for transmitting power wirelessly between a power transmitter comprising a light source, means for directing the light emitted by the light source in a desired direction, and means for controlling the intensity of the light emitted by the light source, and at least one power receiver comprising a photo-detector for receiving emitted light and for converting it into electric current. The light source of the power transmitter transmits a parallel light, the intensity of which is substantially less than the allowed maximum eye exposure. The photo-detector of the power receiver detects the light emitted by the light source and determines the integrity of the light beam, and the power receiver transmits a control signal to the power transmitter. The intensity of the light transmitted by the light source of the power transmitter is increased in response to receiving from the power receiver a control signal.
256 Citations
25 Claims
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1. A method for transmitting power wirelessly in a system that comprises a power transmitter and at least one power receiver, the power transmitter comprising a light source, means for directing the light emitted by the light source in a desired direction, and, means for controlling the intensity of the light emitted by the light source, and the power receiver comprising a photo-detector for receiving emitted light and for converting it into electric current, the method comprising
transmitting with the light source of the power transmitter a substantially parallel light, the intensity of which is substantially less than the allowed maximum eye exposure, detecting by the photo-detector of the power receiver the light emitted by the light source, determining the integrity of the light beam emitted by the light source and detected by the photo-detector, transmitting a control signal is transmitted from the power receiver to the power transmitter in response to finding the light beam intact, and increasing the intensity of the light transmitted by the light source of the power transmitter in response to receiving said control signal from the power receiver concerning the integrity of the light beam.
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9. A wireless power transmission system that comprises a power transmitter and at least one power receiver,
the power transmitter comprising a light source, means for directing the light emitted by the light source in a desired direction, and control means for controlling the intensity of the light emitted by the light source in such a manner that the intensity is substantially less than the allowed maximum eye exposure; -
the power receiver comprises a photo-detector for receiving and detecting the light emitted by the light source and for converting it into electric current, said photo-detector being arranged to determine the integrity of the received light beam, and transmission means responsive to the determination of integrity, which are arranged to transmit a control signal to the power transmitter in response to finding the light beam intact;
whereby in response to receiving the control signal, the control means of the power transmitter are arranged to increase the intensity of the light transmitted by the light source of the power transmitter. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A power transmitter for transmitting power wirelessly, comprising a light source, means for directing the light emitted by the light source in a desired direction, control means for controlling the intensity of the light emitted by the light source in such a manner that the intensity is substantially less than the allowed maximum eye exposure, and a receiver for receiving a control signal transmitted by a power receiver, the control signal indicating the integrity of the received emitted light beam,
whereby in response to receiving the control signal, the control means of the power transmitter are arranged to increase the intensity of the light transmitted by the light source of the power transmitter.
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21. A power receiver a photo-detector for receiving and detecting the light emitted by the light source and for converting it into electric current, said photo-detector being arranged to determine the integrity of the received light beam, and transmission means responsive to the determination of integrity, which are arranged to transmit a control signal to the power transmitter in response to finding the light beam intact.
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22. A wireless surveillance system that comprises a base station and at least one surveillance device,
the base station comprising a radio frequency transceiver for establishing a telecommunications connection to said at least one surveillance device, a power transmitter that comprises a light source, means for directing the light emitted by the light source in a desired direction, and control means for controlling the intensity of the light emitted by the light source in such a manner that the intensity is substantially less than the allowed maximum eye exposure, and a receiver for receiving a control signal transmitted by a power receiver, the control signal indicating the integrity of the received emitted light beam; - and
the surveillance device comprising means for generating surveillance data, a radio frequency transceiver for transmitting the surveillance data wirelessly to the base station, a power receiver that comprises a photo-detector for detecting said emitted light and for determining the integrity of the received light beam, and transmission means responsive to said determination of integrity, which are arranged to transmit a control signal to the power transmitter in response to finding the light beam intact, whereby in response to receiving the control signal, the control means of the power transmitter are arranged to increase the intensity of the light transmitted by the light source of the power transmitter. - View Dependent Claims (23, 24, 25)
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Specification