Abstract: A method and circuits for multiplex driving of a liquid crystal element employing a ferroelectric liquid crystal therein. The method includes the step of applying a voltage pulse having an amplitude and a pulse width which exceeds a saturation voltage during a first half of a selecting term or a non-selecting term just before the selecting term to place the liquid crystal element in an "ON" or "OFF" state. The method also includes the step of applying the voltage pulse having a opposite polarity with respect to said voltage pulse and having an amplitude and a pulse width smaller than the threshhold voltage or exceeding the saturation voltage so that it is selected in order to maintain or to change the "ON" or "OFF" state. Further, it includes the step of rendering the average of a DC component which is applied to the liquid crystal element to zero by the method for applying a voltage pulse.
Type:
Grant
Filed:
April 22, 1987
Date of Patent:
July 25, 1989
Assignee:
Seiko Epson Corporation
Inventors:
Minoru Yazaki, Yuzuru Sato, Akihiko Ito