Flexoelectric liquid crystal device

Details Flexoelectric liquid crystal device Flexoelectric liquid crystal device

G - Physics

02

F

345/59

G02F 1/137 (2006.01) G02F 1/139 (2006.01)

Patent

CA 1304492

Abstract A liquid crystal device includes a liquid crystal material in which the molecules form a helix having its axis essentially parallel to the plates of the device. A suitable electric field, applied essentially perpendicular to the plates, causes planes of the directors to rotate about the field direction to an acute angle ? with respect to the helix axis, thereby inducing alternating bands of splay and bend in the material. Suchconfigurations, which have polar symmetry, give rise to the flexoelectric effect in which the polarization of the molecules tends to be parallel to the applied field, and the magnitude of the field is linearly related to tan ?. The ability to rotate the directors means that the optical properties of the material can be changed

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