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.

Abstract: Example embodiments presented herein may be directed towards an antiferroelectric liquid crystal (AFLC) device and a method for writing greyscale in the AFLC device. The device may comprise two electrode substrates confining an antiferroelectric liquid crystal (AFLC) material. The method may comprise driving the AFLC device with an electrical signal, where the electrical signal does not comprise a direct current holding voltage for a writing of at least a portion of written levels of grey. The method may also comprise inducing a greyscale configuration in the AFLC device as a function of the driving, wherein the inducing is temperature independent. The method may also comprise applying a high-frequency signal, to stabilize a well-defined horizontal tilt plane of the antiferroelectric or, in particular, of the orthoconic antiferroelectric. The examples embodiments presented herein provide for fast and precise writing of greyscales in orthoconic antiferroelectrics.

Abstract: Example embodiments presented herein may be directed towards an antiferroelectric liquid crystal (AFLC) device and a method for writing greyscale in the AFLC device. The device may comprise two electrode substrates confining an antiferroelectric liquid crystal (AFLC) material. The method may comprise driving the AFLC device with an electrical signal, where the electrical signal does not comprise a direct current holding voltage for a writing of at least a portion of written levels of grey. The method may also comprise inducing a greyscale configuration in the AFLC device as a function of the driving, wherein the inducing is temperature independent. The method may also comprise applying a high-frequency signal, to stabilize a well-defined horizontal tilt plane of the antiferroelectric or, in particular, of the orthoconic antiferroelectric. The examples embodiments presented herein provide for fast and precise writing of greyscales in orthoconic antiferroelectrics.

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.

Abstract: The invention relates to a liquid crystal device, comprising an antiferroelectric liquid crystal material (AFLC material) having smectic layers, and two substrates confining the AFLC material therebetween, wherein the AFLC material is uniaxial negative. Preferably, the AFLC material is uniaxial as a consequence of a surface stabilization and of a selected smectic tilt angle ? of the AFLC material. Preferably, the angle ? is in the range of 40°???50°, especially 45°. The invention also relates to electrooptic liquid crystal devices.

Abstract: The invention relates to a liquid crystal device, comprising an antiferroelectric liquid crystal material (AFLC material) having smectic layers, and two substrates confining said AFLC material therebetween, wherein said AFLC material is uniaxial negative. Preferably, the AFLC material is uniaxial as a consequence of a surface stabilization and of a selected smectic tilt angle &thgr; of said AFLC material. Preferably, said angle &thgr; is in the range of 40°<&thgr;<50°, especially 45°. The invention also relates to electrooptic liquid crystal devices.