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Display device

  • US 5,627,560 A
  • Filed: 06/06/1995
  • Issued: 05/06/1997
  • Est. Priority Date: 06/09/1994
  • Status: Expired due to Fees
First Claim
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1. A display device comprising a first substrate having a group of selection electrodes and a group of data electrodes and a matrix of picture electrodes arranged in rows and columns at the locations of ferro-electric liquid crystal display elements between the first substrate and a second substrate provided with a counter electrode, each display element being connected to a data electrode via an active switching element and the display device comprising means for bringing, prior to selection, a row of display elements to an extreme optical transmission state by means of an auxiliary signal, characterized in that the display device comprises a drive circuit for alternately applying the auxiliary signal and a data-offset voltage (Vcomsel) to the counter electrode on the second substrate, said data-offset voltage being applied to said counter electrode during the application of a data voltage to one of said data electrodes.

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