Wireless power and data transmission
First Claim
1. A method of transmitting data in a wireless power transmission system comprising a power transmitter which comprises a first light source, means for directing light emitted by the first light source in a desired direction, and at least one power receiver which comprises a first photo-detector for receiving the emitted light and for converting it into electric current, the method comprising:
- transmitting, by a second light source included in the power transmitter, substantially parallelly and as pulses, light arranged around the light emitted by the first light source, the intensity of the pulses being substantially lower than the intensity of the light emitted by the first light source and data bits being encoded in the pulses so as to determine a maximum time interval between two successive pulses,indicating, by a second photo-detector included in the power receiver, light pulses emitted by the second light source,determining data included in the light pulses and time between successive received light pulses, andtransmitting a control signal indicating disturbance-free reception of data from the power receiver to the power transmitter in response to the time between successive received light pulses not exceeding the maximum time interval determined for two successive pulses.
1 Assignment
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Accused Products
Abstract
A method of transmitting data in a wireless power transmission system comprising a power transmitter including a first and a second light source and means for directing the emitted light. The second light source is used for transmitting, parallel and as low-intensity pulses, light arranged around the light emitted by the first light source, data bits being encoded in the pulses so as to determine a maximum time interval between two successive pulses. At least one power receiver of the system comprises a first and a second photo-detector for receiving the emitted light and for converting it into electric current. The second photo-detector is used for indicating light pulses and data included therein and time between successive light pulses. A control signal indicating disturbance-free reception of data is transmitted to the transmitter if the time between successive light pulses does not exceed a predetermined maximum time interval.
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Citations
12 Claims
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1. A method of transmitting data in a wireless power transmission system comprising a power transmitter which comprises a first light source, means for directing light emitted by the first light source in a desired direction, and at least one power receiver which comprises a first photo-detector for receiving the emitted light and for converting it into electric current, the method comprising:
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transmitting, by a second light source included in the power transmitter, substantially parallelly and as pulses, light arranged around the light emitted by the first light source, the intensity of the pulses being substantially lower than the intensity of the light emitted by the first light source and data bits being encoded in the pulses so as to determine a maximum time interval between two successive pulses, indicating, by a second photo-detector included in the power receiver, light pulses emitted by the second light source, determining data included in the light pulses and time between successive received light pulses, and transmitting a control signal indicating disturbance-free reception of data from the power receiver to the power transmitter in response to the time between successive received light pulses not exceeding the maximum time interval determined for two successive pulses. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless power transmission system comprising:
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a power transmitter which comprises a first light source and means for directing light emitted by the first light source in a desired direction, and at least one power receiver which comprises a first photo-detector for receiving the emitted light and for converting it into electric current, a second light source emitting light pulses of a substantially lower intensity than the intensity of light pulses emitted by the first light source, the pulses being arranged to be transmitted substantially parallelly around the light emitted by the first light source and data bits being encoded in the pulses so as to determine a maximum time interval between two successive pulses; and at least one power receiver which comprises a first photo-detector for receiving the emitted light and for converting it into electric current, a second photo-detector for indicating light pulses emitted by the second light source, means for determining data included in the light pulses and time between successive received light pulses, and transmitting means responsive to the determination, arranged to transmit a control signal to the power transmitter in response to the time between successive received light pulses not exceeding the maximum time interval determined for two successive pulses. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification