Stabilization of antiferroelectric liquid crystals
OwnerSven T Lagerwall, Per Rudquistinventors
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Abstract
Example embodiments disclosed herein relate to the stabilization of the orthoconic state in orthoconic antiferroelectric liquid crystal devices. According to some of the example embodiments, the stabilization may be obtained by tuning a device cell as well as material parameters. The orthoconic state may be stabilized by means of the cell surfaces, electric fields, and/or polymer-stabilization, and combinations thereof, under selected conditions. The example embodiments presented herein advances several new working modes as well as new types of applications of orthoconic antiferroelectric liquid crystals.
Claims26
A method for securing a stabilization of a liquid crystal device, the liquid crystal device comprising an antiferroelectric liquid crystal material having smectic layers, and two substrates confining said antiferroelectric liquid crystal material, the method comprising:
- introducing a stabilization agent to the antiferroelectric liquid crystal material;
- stabilizing the antiferroelectric liquid crystal material with the stabilization agent;
- and
- inducing a stabilized orthoconic state wherein the antiferroelectric liquid crystal is uniaxial negative and comprises an optic axis perpendicular to the substrates;
- wherein a relationship between the helix pitch and a stabilizing temperature is altered as a function of the induced stabilization.
A liquid crystal device, the liquid crystal device comprising an antiferroelectric liquid crystal material having smectic layers, and two substrates confining said antiferroelectric liquid crystal material, the liquid crystal device comprising:
- a stabilization agent, said stabilization agent being introduced to the antiferroelectric liquid crystal material for stabilization;
- wherein said stabilization induces a stabilized orthoconic state wherein the antiferroelectric liquid crystal is uniaxial negative and comprises an optic axis perpendicular to the substrates;
- and
- wherein a relationship between the helix pitch and a stabilizing temperature is altered as a function of the induced stabilization.
Dependencies are inferred from the claim text.