Patent ID: 6436312
Filing Date: 2002-08-20
Classification: C07C,C09K,G02F

Abstract:
A liquid crystal composition comprising a host material capable of exhibiting a smectic C phase, and a chiral dopant material which imparts or enhances chirality in the host material, said composition exhibiting temperature-dependent response time-operating voltage curves with a voltage minimum (&tgr;-Vmin curves), wherein (a) the chiral dopant material comprises at least first and second chiral centres, (b) the chiral centres individually produce, in the liquid crystal composition, different and complementary temperature coefficients of spontaneous polarisation within a predetermined temperature range, and (c) the chiral centres are present in the liquid crystal composition in relative amounts such that regions of the &tgr;-Vmin curves across the predetermined temperature range are substantially coincident.