Multilayer optical compensator, liquid crystal display, and process

Disclosed is a multilayer compensator polymeric film for a LC cell comprising two or more first layers having an out-of-plane birefringence not more negative than -0.005 and one or more second layers having an out-of-plane birefringence more negative than -0.005, wherein the second layers are amorph...

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Bibliographische Detailangaben
Hauptverfasser:	ELMAN JAMES F, MAJUMDAR DEBASIS, NAIR MRIDULA, YONKOSKI ROGER, ANDERSON CHARLES C
Format:	Patent
Sprache:	eng
Schlagworte:	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 LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING
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Beschreibung
Zusammenfassung:	Disclosed is a multilayer compensator polymeric film for a LC cell comprising two or more first layers having an out-of-plane birefringence not more negative than -0.005 and one or more second layers having an out-of-plane birefringence more negative than -0.005, wherein the second layers are amorphous and comprise selected polymeric materials having sufficient thickness so that the overall in-plane retardation (Re) of the compensator is from 0 to 300 nm and the out-of-plane retardation (Rth) of at least one of the one or more second layers is more negative than -20 nm wherein: (a) a first layer is present that is contiguous to a second layer and is between all of the second layers and all of the other first layers; (b) at least one of the second layers or one of the other first layers is a layer coated from an organic solvent; and (c) the contiguous first layer contains a polymer that is water soluble or water dispersible in an amount sufficient to impede the diffusion of the organic solvent between the other first layers and the second layers.