A two-frequency coincidence addressing scheme for nematic liquid-crystal displays

We describe a novel coincidence addressing plan for multiplexing multi-element liquid-crystal matrix displays which depend upon dynamic scattering (electrohydrodynamic turbulence) to achieve a light-scattering state. This plan exploits the qualitatively different responses of certain nematic liquid crystals to electrical signals of different frequencies. The approach was motivated by the absence of a sharp threshold in the scattering versus voltage characteristic, an attribute which has impeded the use of voltage half-select schemes.