Nematic liquid crystal composition for display devices

Details Nematic liquid crystal composition for display devices Nematic liquid crystal composition for display devices

1979-08-29

1986-05-13

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 25229963, 25229964, 25229965, 25229966, 25229967, 25229968, 350350R, G02F 113, C09K 334

Patent

active

045885184

ABSTRACT:
A nematic liquid crystal composition comprising (a) at least one compound of the formula: ##STR1## wherein R.sub.1 is n--C.sub.m H.sub.2m+1, n--C.sub.m H.sub.2m+1 --O or n--C.sub.m H.sub.2m+1 --CO; R.sub.2 is n--C.sub.q H.sub.2q+1, n--C.sub.q H.sub.2q+1 --O or n--C.sub.q H.sub.2q+1 --CO; m and q are each an integer of 1 to 10 and n is a symbol indicating that carbons are linked linearly, and (b) at least one compound of the formula: ##STR2## wherein R.sub.3 is n--C.sub.r H.sub.2r+1 or n--C.sub.r H.sub.2r+1 --O; R.sub.4 is n--C.sub.s H.sub.2s+1 or n--C.sub.s H.sub.2s+1 --O; r and s are each an integer of 1 to 10 and n is as defined above, and where necessary (c) at least one nematic liquid crystal compound having positive dielectric anisotropy and/or its homologous compound, and if necessary (d) at least one nematic liquid crystal compound having negative dielectric anisotropy and/or its homologous compound. This liquid crystal composition, when used for a display device, shows excellent properties in that it is oriented with high stability over a wide temperature range, allows wide-range setting of threshold voltage and is small in temperature dependency and quick to respond to the applied voltage.

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