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Apparatus for controlling and sensing moisture on a movable closure member, more particularly an electrically powered automotive window pane

  • US 7,548,809 B2
  • Filed: 01/18/2005
  • Issued: 06/16/2009
  • Est. Priority Date: 01/16/2004
  • Status: Expired due to Fees
First Claim
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1. An apparatus for controlling and sensing a closure member movable between an open position and a closed position, more particularly an electrically powered window pane in a motor vehicle, comprising:

  • a sensor having a sensor electrode generating an electric field in an opening range of the closure member anda controller connected to the sensor and detecting any change in capacitance of the sensor electrode in providing a control signal,the controller detecting a change in capacitance of the sensor electrode on the basis of the presence of film of moisture on the closure member;

    wherein the sensor is operable in a first sensitivity mode and in a second sensitivity mode;

    wherein the controller detecting in the first sensitivity mode a change in capacitance of the sensor electrode due to the presence of an obstruction in the opening range of the closure member; and

    wherein the controller detecting in the second sensitivity mode a change in capacitance of the sensor electrode due to the presence of a film of moisture on the closure member.

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