Recent Development of Polymer Network Liquid Crystal Displays.

Abstract

We have studied the electro-optical properties in Polymer Network Liquid Crystal Displays which are composed of a three-dimensional polymer network formed in continuous liquid crystal layers prepared by photo-polymerization induced phase separation processes. In view of the behavior in the orientation of the liquid crystal molecule at the polymer's surface, it can be clarified that the electro-optical properties are strongly governed by the polymer. By a combination of two different characteristics of the polymers with respect to a temperature dependence, a variation in the driving voltage for a temperature change can be improved.

Reverse-Mode Liquid Crystal Gels with Twisted Orientation

“…L iquid crystal/polymer composites, called polymer dispersed liquid crystal (PDLC) [1][2][3] and polymer network liquid crystal (PNLC) films, [4][5][6] are of interest for their usefulness in display and light shutter devices. Typical PDLC and PNLC assume a light scattering off-state and a transparent on-state in the absence of a polarizer.…”

Normal and Reverse Mode Light Scattering Properties in Nematic Liquid Crystal Cell Using Polymer Stabilized Effect

“…The liquid crystal / polymer composite systems have been proposed as a polymer dispersed liquid crystal (PDLC) [1][2][3] and polymer network liquid crystal (PNLC) films [4][5][6] which typically show a light scattering state in the voltage off-state and a transparent state in the on-state. This switching property is called a normal mode.…”