Supertwisted nematic liquid crystal display for laptop, contains liquid crystal mixture comprising liquid crystalline components having respective dielectric anisotropy and specific compounds

摘要

Liquid crystal display contains nematic liquid crystal mixture comprising 30-90 weight% (wt.%) of liquid crystalline component (LCC) (A) comprising compound(s) with dielectric anisotropy of +1.5 or more, 10-55 wt.% of LCC (B) comprising compound(s) with dielectric anisotropy of -1.5 to +1.5 and 0-10 wt.% of LCC (D) comprising compound(s) with dielectric anisotropy of -1.5 or less, and specific compounds. Supertwisted nematic liquid crystal display nematic liquid crystal mixture comprising 30-90 weight% (wt.%) of liquid crystalline component (LCC) (A) comprising compound(s) having dielectric anisotropy of +1.5 or more, 10-55 wt.% of LCC (B) comprising compound(s) having dielectric anisotropy of -1.5 to +1.5, 0-10 wt.% of LCC (D) comprising compound(s) having dielectric anisotropy of -1.5 or less, and optically active component (C) in amount such that the ratio between layer thickness (separation of plane-parallel outer plates) and natural pitch of chiral nematic liquid crystal mixture is 0.2-1.3. The liquid crystal mixture comprises compound(s) of formula (IA) and compound(s) of component (A) of formula (IB). [Image] R 3>2-7C alkenyl group; R 4>optionally 1-12C fluorinated alkyl, alkoxy, alkenyl or alkenyloxy, 1 or 2 adjacent CH 2 groups is replaced by -O-, -CH=CH-, -CO-, -OCO- or -COO-, such that oxygen atoms are not directly adjacent to one another, or in case m = 1, R 4> = Q-Y; Q : CF 2, OCF 2, CFH, OCFH or single bond; Y : F or Cl; L 1>,L 2>H or F; m : 0 or 1; Y 1>,Y 2>H or F; W : substituted benzoate of formula (W1-W3), substituted thiophene carboxylate derivatives of formula (W4-W6), pyrimidine derivatives of formula (W7) and heterocyclic derivatives of formula (W8); R 5>2-20C alkenyl or alkynyl; R 6>1-10C alkyl or alkoxy, alkenyl, alkenyloxy, 2-10C alkynyl or alkynyloxy; R 7>2-10C alkynyl or alkynyloxy [Image] The display contains two plane-parallel outer plates together with a frame forming a cell, nematic liquid crystal mixture of positive dielectric anisotropy present in cell and electrode layers with superposed alignment layers on the inner sides of the outer plates. A pre-tilt angle between longitudinal axis of the molecules at the surface of the outer plates and outer plates of 1-30[deg], and a twist angle of liquid crystal mixture in the cell from alignment layer to alignment layer of 22.5-600[deg]. The outer plates address each pixel by orthogonal row wave forms. Independent claims are also included for the following: (i) Liquid crystal mixture or composition; (ii) Compound (IB).