Electro-optic pulse response of ferroelectric liquid crystals

On the biaxiality of smectic C and ferroelectric liquid crystals

“…This effect is particularly noticeable if |P S | / ∂e is low or the electric field E z is high. In such instances, the dielectric terms reduce the rate of decrease of the latching time with increasing field strength until a minimum slot width is reached [28]. Above the socalled τV minimum, or τV min the response slows rapidly with increasing field, ultimately diverging to infinity, at the field where the dielectric and ferroelectric torques balance.…”

The “JOERS/Alvey” ferroelectric multiplexing scheme

“…The leading part in two cases (GEC and Leti-Bari) is designed to effect switching, acting as a blanking pulse in that it sets all pixels to one optical state, while the trailing part selectively switches pixels to the other optical state. In the other case (Seiko) the leading pulse will effect 6 waveforms. The Seiko scheme is DC balanced in one scan but requires two scans to switch all pixels.…”

“…At voltages greater than that corresponding to Emin the partial switching region is much reduced yielding better discrimination between switching and non-switching voltages and hence a greater operating tolerance to cell thickness variations. In a simple system with bookshelf geometry and uniaxial dielectric anisotropy, the value of the field which gives the minimum response time is 6 Emin= Ps d3.~.~&.sin20…”