Liquid crystal display devices

A pair of appropriately oriented 90 DEG twisted nematic cells 6, 7 each incorporating a guest dye and each having internal electrodes 8, 14, 9, 15 that overlap in part are placed between appropriately oriented crossed polarisers 12, 13 to provide a display device that appears black in transmission w...

Full description

Saved in:
Bibliographic Details
Main Authors MOUTRAN, RAFIK, MCCARTNEY, JOHN HOWARD
Format Patent
LanguageEnglish
French
German
Published 08.06.1983
Subjects
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
Online AccessGet full text

Cover

More Information
Summary:A pair of appropriately oriented 90 DEG twisted nematic cells 6, 7 each incorporating a guest dye and each having internal electrodes 8, 14, 9, 15 that overlap in part are placed between appropriately oriented crossed polarisers 12, 13 to provide a display device that appears black in transmission when unenergised and can be energised to provide one of two alternative legends in black displayed against contrasting backgrounds of different colour. If one of these background colours is white one of the guest dyes is omitted, An appropriately oriented coloured polariser located between the cells may be substituted for a guest dye.
Bibliography:Application Number: EP19820306370