The physics of τV_minferroelectric liquid crystal displays

P‐124: Half V‐Shaped Switching in a Single‐Sided Polyimide FLC Cell with the N‐SmA‐SmC Phase Sequence

“…The resulting defects severe problems in practical applications since they will degrade the EO performance during switching. To overcome such technical difficulties, several approaches including C1 uniform approach [8], C2 uniform approach [9], and chevron-free approach [10] have been presented. Preventing such transformation is the idea of eliminating irregular layer structures and of realizing a uniform orientation.…”

On the biaxiality of smectic C and ferroelectric liquid crystals

“…Above the socalled τV minimum, or τV min the response slows rapidly with increasing field, ultimately diverging to infinity, at the field where the dielectric and ferroelectric torques balance. Numerical modelling shows that the τV minimum occurs at about 60 -64% of the divergence field [29], given by: The shape of the τV curve depends on the dielectric, viscoelastic and tilt properties of the liquid crystal mixture, and the initial director profile dictated by the alignment geometry and degree of AC stabilisation. Accurate determination of the biaxial permittivities is a key step in understanding FLC material behaviour, and most importantly, for helping design improved S C host and FLC materials.…”