BLACK/WHITE LIQUID-CRYSTAL DISPLAY

BLACK/WHITE LIQUID-CRYSTAL DISPLAY

A black/white liquid crystal display (10) contains a nematic liquid crystal having a twist of 270 DEG between two cell plates. The product of the liquid crystal layer thickness and the anisotropy of the refractive index is approximately 0.38. A pretilt of approximately 15 DEG is present. The polaris...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: BROSIG, STEFAN, WALDMANN, JURGEN
Format: Patent
Sprache:eng ; ger
Schlagworte:
ADVERTISING
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
FREQUENCY-CHANGING
LABELS OR NAME-PLATES
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
SEALS
SIGNS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:A black/white liquid crystal display (10) contains a nematic liquid crystal having a twist of 270 DEG between two cell plates. The product of the liquid crystal layer thickness and the anisotropy of the refractive index is approximately 0.38. A pretilt of approximately 15 DEG is present. The polarisation directions (P1, P2) are at an angle beta of 45 DEG to the orientation directions (Mo, Mu). Over a very large range of viewing angle, this display has a relatively low dependence on the contrast of the viewing angle, and there is practically no colour displacement at all that depends on the viewing angle. Because of the considerable improvements, when compared with all known cells, in the range of the viewing angle with respect to contrast and colour neutrality, the display is termed an "extended-viewing-angle" display (EVA display). It can be multiplexed to a very high degree.