Patent ID: 6452650
Filing Date: 2002-09-17
Classification: C09K,G02F

Abstract:
A polymer dispersion type liquid crystal display element comprising:a pair of substrates, one of the substrates being an active matrix substrate having thin film transistors formed thereon; an electrode formed on an opposite surface of each of the substrates; polymers; liquid crystal droplets being deformed into a compressed structure compressed in a cell gap direction; and a polymer-liquid crystal complex held between the pair of substrates, the polymer-liquid crystal complex comprising the polymers and the liquid crystal droplets dispersed in the polymers; wherein: an amount of deformation of the liquid crystal droplets is set to be in range in which a phenomenon of liquid crystal molecules rising up in the cell gap direction is not caused by excluded volume effects of the liquid crystals; when an anchoring strength is represented by a driving voltage V90, where V90 is a driving voltage at a transmittance of 90%, the anchoring strength being an index showing the interaction of the polymers and liquid crystal at the phase boundary between the liquid crystal and the polymers, the anchoring strength is such that the driving voltage V90 is in the range of about 7.5 V to about 12.5 V; and a deformation rate of the liquid crystal droplets is 20% or lower.