Information display device having a liquid crystal cell

This device uses a cell with liquid crystal provided between polarizers. The polarizing means and analyzing means are constructed and positioned so that the light transmission is zero at a voltage Vm on the cell, said voltage Vm being larger than the voltage which corresponds to the optical threshol...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	GOSCIANSKI, MICHEL
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 DISPLAYING EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FREQUENCY-CHANGING LABELS OR NAME-PLATES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SEALS SIGNS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	This device uses a cell with liquid crystal provided between polarizers. The polarizing means and analyzing means are constructed and positioned so that the light transmission is zero at a voltage Vm on the cell, said voltage Vm being larger than the voltage which corresponds to the optical threshold of the cell. The transmission of the cell as a function of the supplied voltage increases considerably above the voltage value Vm. The device is controlled by means of signal voltages which exceed Vm and which show a small voltage swing, while simultaneously a strong light transmission and a good contrast are obtained, which permits of using an information addressing according to lines and columns when a large number of lines are used.