New generations of large area liquid crystal displays require very high optical performance to compete with CRT and other emerging technologies. This performance must include high contrast ratio, high stability of all grey levels, and excellent colour reproduction, and typically this is requested for up to 80# viewing angles in all directions. Some potential difficulties to achieving wide viewing performance in single domain LCD's are discussed, with explanation for the advantages to multi-domain LC display. Finally we shall describe some new optical film developments which can be used to achieve the targets for high performance at all viewing angles combining multi-domain LC display, together with optical films prepared from reactive mesogens.
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