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Audience response system with batteryless response units

  • US 9,537,324 B2
  • Filed: 12/10/2012
  • Issued: 01/03/2017
  • Est. Priority Date: 12/14/2011
  • Status: Expired due to Fees
First Claim
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1. A wireless response system, comprising:

  • a base station and a plurality of response units, said response units wirelessly communicating with said base station in order to retrieve user responses received by said response units;

    each of said response units having a user input device that is adapted to receiving user input selections, a controller that is responsive to said user input device to process user inputs and to communicate responses wirelessly to said base station and a power supply that is adapted to supply power to operate said controller;

    wherein said power supply comprises a super capacitor and a wireless-charging circuit that is adapted to charge said super capacitor;

    wherein said wireless-charging circuit is adapted to supply a current to charge said super capacitor and wherein said power supply or said controller is configured to control the current that is drawn from said super capacitor wherein said wireless-charging circuit comprises a pickup coil and a resonance capacitor combined with said coil thereby defining a resonance circuit.

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