MULTILAYERED OPTICAL COMPENSATOR FILM WITH AMORPHOUS POLYMER FOR LIQUID CRYSTAL DISPLAYS

A multilayer compensator for LCDs includes one or more polymeric first layers and one or more polymeric second layers. The first layers comprise a polymer having an out-of-plane (Dnth) birefringence not more negative than -0.01 or not more positive than +0.01. The second layers comprise an amorphous...

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Bibliographische Detailangaben
Hauptverfasser:	GAMBLE, WILLIAM, JAMES, HURLEY, DANIEL, FRANCIS, ELMAN, JAMES, FRANK
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON 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 GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	A multilayer compensator for LCDs includes one or more polymeric first layers and one or more polymeric second layers. The first layers comprise a polymer having an out-of-plane (Dnth) birefringence not more negative than -0.01 or not more positive than +0.01. The second layers comprise an amorphous polymer having an out-of-plane birefringence more negative than -0.01 or more positive than +0.01. An overall in-plane retardation (Rin) of the multilayer compensator is greater than 20nm and the out-of-plane retardation (Rth) of the multilayer compensator is more negative than -20nm or more positive than +20nm. The in-plane retardation (Rin) of the one or more first layers is 30% or less of the overall in-plane retardation (Rin) of the multilayer compensator. L'invention concerne un compensateur multicouche comprenant une ou plusieurs premières couches polymères et une ou plusieurs deuxièmes couches polymères. Les premières couches contiennent un polymère doté d'une biréfringence hors plan ( DELTA nth) dont la négativité ne dépasse pas -0.01 ou dont la positivité ne dépasse pas +0.01. Les deuxièmes couches contiennent un polymère amorphe doté d'une biréfringence hors plan dont la négativité est supérieure à -0.01 ou dont la positivité est supérieure à +0.01. Un retard global dans le plan (Rin) du compensateur multicouche est supérieur à 20nm et le retard hors plan (Rth) du compensateur multicouche a une négativité supérieure à -20nm ou une positivité supérieure à +20nm. Le retard dans le plan (Rin) de la ou des premières couches est inférieur ou égal à 30 % du retard global dans le plan (Rin) du compensateur multicouche.