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Backrest for a vehicle seat

  • US 20080111407A1
  • Filed: 09/07/2007
  • Published: 05/15/2008
  • Est. Priority Date: 03/08/2005
  • Status: Active Grant
First Claim
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1. A backrest with head support for a vehicle seat, comprising:

  • a substantially upright backrest;

    a head support mounted in the backrest and adjustable in height to an end position with respect to the backrest;

    at least two capacitive proximity sensors arranged in the head support for detecting the position of the head of a person sitting in the vehicle seat in relation to the head support; and

    an indicator responsive to proximity signals from the proximity sensors dependent on the proximity of the person'"'"'s head to the headrest;

    wherein the two proximity sensors produce an indication of the position of the head support with respect to the head as a function of the detected capacitances on the electrodes formed by the head and one of the at least two proximity sensors each.

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