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Title:
ANTIFERROELECTRIC LIQUID CRYSTAL DISPLAY ELEMENT
Document Type and Number:
Japanese Patent JP3259600
Kind Code:
B2
Abstract:

PURPOSE: To allow an antiferroelectric liquid crystal display element of an active matrix type to distinct gradation display.
CONSTITUTION: Antiferroelectric liquid crystals 21 of which liquid crystal molecules have two orientation states are sealed into the liquid crystal display element of the active matrix type. The liquid crystal molecules in the first and second orientation states partly change to the second or first orientation state according to impressed voltage when the voltage is impressed on the antiferroelectric liquid crystals 21. The ratio of the liquid crystal molecules in the first orientation state and the liquid crystal molecules in the second orientation state, therefore, changes continuously according to the impressed voltage. The free rotation around the molecule major axis of the liquid crystal molecules is suppressed by the impression of the electric field and the liquid crystals are inclined in the direction perpendicular to the electric field by the polarization by such suppression. The numerical optical intermediate states are, therefore, formed. Then, the distinct gradation display is made possible by driving such liquid crystal display element.


Inventors:
Tanaka, Tomio
Yoshida, Tetsushi
Application Number:
JP15711395A
Publication Date:
February 25, 2002
Filing Date:
May 31, 1995
Export Citation:
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Assignee:
CASIO COMPUT CO LTD
International Classes:
G02F1/137; G02F1/133; G02F1/1337; G02F1/141; (IPC1-7): G02F1/141; G02F1/1337