Wireless power transmission

  • US 20040227057A1
  • Filed: 04/07/2004
  • Published: 11/18/2004
  • Est. Priority Date: 04/17/2003
  • Status: Abandoned Application
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First Claim
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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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