Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate
2006-07-18
2006-07-18
Porta, David (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
C322S00200R, C398S118000, C136S243000, C455S069000
Reexamination Certificate
active
07078666
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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Hämäläinen Kai
Tuominen Juha
Ailocom Oy
Ladas & Parry LLP
Yam Stephen
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