Drive method and drive circuit of liquid display apparatus

This invention provides the drive method and drive circuit of liquid crystal display apparatus that use bistable twisted nematic (BTN) liquid crystal. In the drive method of this invention, the first and the second signals with positive or negative voltages are used to apply voltage to the liquid cr...

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Bibliographische Detailangaben
Hauptverfasser:	SONG, BYEONG-SANG, KIM, IL-NOUNG, LEE, EUNG-SANG
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:	This invention provides the drive method and drive circuit of liquid crystal display apparatus that use bistable twisted nematic (BTN) liquid crystal. In the drive method of this invention, the first and the second signals with positive or negative voltages are used to apply voltage to the liquid crystal cell such that the sum of the voltage is equal to zero in order to reach the purpose of removing the DC component. The constitutions of this drive circuit include the followings: the means of applying the first, the second voltages, and the means of applying the switching control signal and the voltage-inversion switching control signal; selectively switching the first and the second voltages according to the switching control signal; selectively switching the first and the second voltages to invert them according to the voltage-inversion switching control signal; and signal output to the multiplexer of driving device connected with the liquid crystal cell.