LIQUID CRYSTAL DISPLAY DEVICE

LIQUID CRYSTAL DISPLAY DEVICE

PURPOSE:To improve the display quality by equalizing the retardation of a 1st liquid crystal layer interposed between transparent electrodes in an unselected state, to the retardation of a 2nd liquid crystal layer. CONSTITUTION:A voltage for driving all picture elements on a time-division basis or a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MUROYA HIROAKI, MOTOMURA TOSHIRO
Format: Patent
Sprache:eng
Schlagworte:
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
FREQUENCY-CHANGING
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:PURPOSE:To improve the display quality by equalizing the retardation of a 1st liquid crystal layer interposed between transparent electrodes in an unselected state, to the retardation of a 2nd liquid crystal layer. CONSTITUTION:A voltage for driving all picture elements on a time-division basis or a voltage for driving picture elements at intersections of the transparent electrodes 8 and 9 selectively is applied from an electrode 14 to the transparent electrodes 8 and 9. In this 1st liquid crystal layer 7 which is driven on the time-division basis, the bias voltage is also applied between transparent electrodes 8 and 9 in an area where picture elements are not selected, and a power source 22 applies a voltage between transparent electrodes 11a and 11b so that the retardation of the 1st liquid crystal layer 7 in the unselected state comes to equal to the retardation of the 2nd liquid crystal layer 20. Consequently, a coloring phenomenon is eliminated and a high contrast is obtained.