Patent ID: 6707517
Filing Date: 2004-03-16
Classification: G02F

Abstract:
A display sheet having polymer dispersed liquid crystals, comprising:a) a substrate; b) a state changing layer disposed over the substrate and defining first and second surfaces, such state changing layer having the polymer dispersed liquid crystals having first and second optical states, which can change state; (c) a first conductor disposed over the first surface of the state changing layer; d) a second conductor on the second surface of the state changing layer so that when a field is applied between the first and second conductors, the liquid crystals change state; and e) a nonconductive, field spreading layer having transparent electrically conductive polymer dispersed sub-micron particles, said nonconductive field spreading layer disposed between the state changing layer and the first conductor to provide a change of state in the state changing layer outside of areas between both conductors in response to a field applied between the first and second conductors which changes the state of the liquid crystals.