Oligosiloxane Modified Liquid Crystal Formulations and Devices Using Same
A liquid crystal formulation is described. The liquid crystal formulation comprises a first oligosiloxane-modified nano-phase segregating liquid crystalline material; and at least one additional material selected from a second oligosiloxane-modified nano-phase segregating liquid crystalline material, non-liquid crystalline oligosiloxane-modified materials, organic liquid crystalline materials, or organic non-liquid crystalline materials, wherein the liquid crystal formulation is nano-phase segregated in the SmC* phase, has an I->SmC* phase transition, with a SmC* temperature range from about 15 DEG C. to about 35 DEG C., has a tilt angle of about 22.5 DEG +-6 DEG or about 45 DEG +-6 DEG , and has a spontaneous polarization of less than about 50 nC/cm2, and a rotational viscosity of less than about 600 cP. Devices containing liquid crystal formulations are also described. The device has a stable bookshelf geometry, bistable switching, and isothermal electric field alignment, a response time of less than 500 [mu]s when switched between two stable states, and an electric drive field of less than about 30 V/[mu]m.
HANNINGTON JONATHAN PAUL [US]; CLAPP TERRY VICTOR [GB]; NISHIDA FUMITO [US]; KING RUSSELL KEITH [US]; FAROOQ OMAR [US]; GRASMANN
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