Zenithal bistable device

Fig. 7.15. The vertically aligned nematic-hybrid aligned nematic (VAN-HAN) zenithal bistable device geometry. The homeotropic state (left) is black while the hybrid state (right) is bright.

Zenithal bistable devices have been used in several types of electro-optic geometry. In the VAN-HAN mode, Fig. 7.15, one ZBD surface is combined with a fiat homeotropic surface. In the planar ZBD state (Fig. 7.15 right), the nematic is hybrid aligned with the director plane rotated 45° with... 

Here we consider only homeotropic grating surface alignment. A zenithal bistable device surface can also be realized with planar surface anchoring on the grating surface. ... 

T.J. Spencer and C.M. Care, Lattice Boltzmann scheme for modeling liquid-crystal dynamics Zenithal bistable device in the presence of defect motion, Phys. Rev. E 74(6), 061708/1-14, (2006). doi 10.1103/PhysRevE.74.061708... 

J.C. Jones and S. Beldon, 10.4 High image content zenithal bistable devices, SID Symp. Digest Tech. Papers 35(1), 140 143, (2004). doi 10.1889/1.1825769... 

Vertically aligned nematic Weak electrolyte model Zenithal bistable device... 

E. L. Wood, G. P. Bryan-Brown, P. Brett, A. Graham, J. C. Jones and J. R. Hughes, Zenithal bistable device (ZBD) suitable for portable applications, SID Inti. Symp. Digest Tech. Papers, 31, 124 (2(X)0). 

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