DRIVE METHOD AND DRIVE DEVICE FOR BISTABLE LIQUID CRYSTAL DISPLAY PANEL

PROBLEM TO BE SOLVED: To solve the problems that, in a drive process for bistable nematic dot matrix liquid crystal display panels, electric charges seem to still remain in liquid crystals even when COM electrodes and SEG electrodes have reached a GND status in view of the observations that the writ...

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Bibliographische Detailangaben
Hauptverfasser:	HIRAYAMA NAOYUKI, HOSHINO MASAFUMI
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 solve the problems that, in a drive process for bistable nematic dot matrix liquid crystal display panels, electric charges seem to still remain in liquid crystals even when COM electrodes and SEG electrodes have reached a GND status in view of the observations that the write waveform has a DC component and, immediately after the end of write-in, liquid crystal molecules are not yet stable in orientation regulating force but reach stability only gradually and that, though a single round of write-in takes only a short time and poses no problem, the bistable liquid crystal display panel is destroyed as the rounds of write-in increase.SOLUTION: By a drive method for bistable liquid crystal display panels, immediately after applying a waveform for rewriting a bistable liquid crystal display panel, an AC waveform of a lower voltage than the final pulse of the waveform is applied, and the voltage is gradually brought close to 0 V.