LIQUID CRYSTAL DISPLAY DEVICE

PURPOSE:To attain stable switching by arranging a direction of spontaneous polarization in the direction of a one side oriented film in the whole area in a cell and superimposing a specific voltage calculated from the voltage bringing about the switching on a drive pulse voltage when the magnitude o...

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Bibliographic Details
Main Authors SHIRANE HIROO, INOUE OSAMI
Format Patent
LanguageEnglish
Published 26.09.1995
Edition6
Subjects
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
CRYPTOGRAPHY
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
DISPLAY
EDUCATION
FREQUENCY-CHANGING
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
SEALS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Summary:PURPOSE:To attain stable switching by arranging a direction of spontaneous polarization in the direction of a one side oriented film in the whole area in a cell and superimposing a specific voltage calculated from the voltage bringing about the switching on a drive pulse voltage when the magnitude of the impressed voltage is changed. CONSTITUTION:The direction of the spontaneous polarization of a liquid crystal composition is arranged in the direction of the one side oriented film in the whole area between transparent electrode substrates, and an oriented state of a liquid crystal molecule is changed by continuously changing the magnitude of the voltage impressed to a liquid crystal display element from a (+) side to a (-) side and from the (-) side to the (+) side. Further, when the voltage when the oriented state is changed for the voltage change from the (+) side to the (-) side is defined as V1, and the voltage when the oriented state is changed for the voltage change from the (-) side to the (+) side is defined as V2, a bi-polarity pulse voltage superimposed with a DC voltage with the magnitude of 0.7-1.3 times of the voltage calculated by (V1+V2)/2 and the same polarity is impressed to drive. Its waveform is a DC voltage component superimposed on the pulse voltage, that is, a bi-stabilized voltage VBS, and cancels an internal voltage.
Bibliography:Application Number: JP19940038639