Dependence of light-leakage caused by spherical spacers on liquid crystal mixture in super twisted nematic liquid crystal displays

The dependence of light-leakage caused by domain formation around spacers o n liquid crystal mixture is observed. It is found that the surface alignmen t of liquid crystal molecules on the spacer depends on the liquid crystal m ixture, which affects the light-leakage intensity. We propose models of the surface alignment, one is a vertical alignment on the spacer and the other is a tangential alignment on the spacer that decreases and increases the l ight-leakage intensity, respectively. These models are confirmed by observi ng their extinction patterns under crossed polarizers.