| abstract |
Super twist liquid crystal display (STN) having short switching time, at the same time having a wide operating temperature range, high characteristic curve steepness, good angle dependence of contrast and low threshold voltage I will provide a. At least one kind of mesogenic compound represented by the following formula I: Wherein R 1 is alkyl having 1 to 8 C atoms, m is 0 or 1 and L 1 is H or F, and at least one of the compounds of formula II: Wherein R 2 is alkyl, alkoxy, oxaalkyl, alkenyl or alkenyloxy having up to 12 C atoms, and Q 1 is F or Cl; Or an alkyl halide having 1 to 5 C atoms, A nematic liquid crystal medium containing an alkoxy or alkenyl. |