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    • 8. 发明授权
    • Liquid crystal apparatus
    • 液晶装置
    • US5035491A
    • 1991-07-30
    • US503678
    • 1990-04-03
    • Hideyuki KawagishiHirofumi IwamotoAkira TsuboyamaTadashi Mihara
    • Hideyuki KawagishiHirofumi IwamotoAkira TsuboyamaTadashi Mihara
    • G02F1/1335G02F1/141
    • G02F1/141G02F2001/133531
    • A liquid crystal apparatus, comprising: a liquid crystal cell comprising a pair of substrates, and a chiral smectic liquid crystal showing at least two different optically stable states formed by cooling from a uniaxial alignment phase and disposed between the substrates; and a polarizer and an analyzer disposed to sandwiched the liquid crystal cell; wherein the chiral smectic liquid crystal, polarizer and analyzer are disposed to satisfy any one of the following sets of conditions I-IV characterized by combination of X, Y and Z directions shown below:______________________________________ X Y Z ______________________________________ I clockwise counterclockwise perpendicular II clockwise clockwise parallel III counterclockwise counterclockwise parallel IV counterclockwise clockwise perpendicular ______________________________________ with proviso that the chiral smectic liquid crystal is disposed so that the long axes of the chiral smectic liquid crystal molecules are aligned with a twist in the X direction along the direction from the polarizer toward the analyzer to form an average molecular long axis proving one optically stable state, and when the average molecular long axis is switched to provide another optically stable state latched in the Y direction with respect to the direction from the analyzer toward the polarizer, the polarizer is disposed to have an electric vector transmission axis which is substantially in the Z direction with respect to the average molecular long axis.