COLOR LIQUID CRYSTAL DISPLAY DEVICE

PROBLEM TO BE SOLVED: To enhance the efficiency of a back light and to reduce electric power consumption when an FSC is performed by a raster scan in an HVFLC. SOLUTION: The matrix type color liquid crystal display device of a light source color switching system includes the raster scan by which a p...

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Bibliographische Detailangaben
Hauptverfasser:	ICHIKAWA TAKESHI, TOKANO GOJI
Format:	Patent
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To enhance the efficiency of a back light and to reduce electric power consumption when an FSC is performed by a raster scan in an HVFLC. SOLUTION: The matrix type color liquid crystal display device of a light source color switching system includes the raster scan by which a positive voltage is applied to a liquid crystal panel and the raster scan by which a negative voltage is applied to the liquid crystal panel in a period when the images corresponding to the respective lighting colors are written. A black display subfield period for one subfield component is provided between the subfield period when the DC component of the applied voltage to the liquid crystal panel in the above period is canceled by subjecting the entire surface of the liquid crystal panel to the raster scan continuously two or more times and the images meeting the lighting colors are written and the subfield period when the images meeting the other lighting colors are next written. The device is effective particularly for a small sized direct view panel. COPYRIGHT: (C)2005,JPO&NCIPI