Liquid-crystal composition and liquid-crystal display element

摘要

PCT No. PCT/JP96/03300 Sec. 371 Date Jul. 10, 1997 Sec. 102(e) Date Jul. 10, 1997 PCT Filed Nov. 11, 1996 PCT Pub. No. WO97/17415 PCT Pub. Date May 15, 1997The present invention provides a guest-host liquid-crystal composition comprising a host liquid-crystal composition containing one or more dichroic dyes, characterized in that the host liquid-crystal composition comprises as the main component a polycyclic compound having three or more rings and having no cyano group in the direction of the molecular axis, the proportion of the polycyclic compound component having three or more rings in the host liquid-crystal composition being 75% by mole or higher, and that the guest-host liquid-crystal composition has an order parameter (S value) of 0.76 or higher. The invention further provides a liquid-crystal display element employing the composition. This guest-host liquid-crystal composition shows excellent dichroism or a high order parameter.