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Drive method for twisted nematic liquid crystal shutters for stereoscopic and other applications

  • US 5,181,133 A
  • Filed: 05/15/1991
  • Issued: 01/19/1993
  • Est. Priority Date: 05/15/1991
  • Status: Expired due to Term
First Claim
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1. A method for driving a shutter including a twisted nematic liquid crystal cell, between a low voltage state in which a low peak-to-peak voltage signal is applied to the cell, and a shuttering state in which a high peak-to-peak voltage signal is applied to the cell, said method including the steps of:

  • (a) applying a first one of the low peak-to-peak voltage signal and the high peak-to-peak voltage signal to the cell;

    (b) then, applying a transition signal to the cell for a transition period, where the transition signal has an envelope whose amplitude varies monotonically over the transition period; and

    (c) then, applying the other of the low peak-to-peak voltage signal and the high peak-to-peak voltage signal to the cell.

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