Liquid crystal display device

1. A liquid crystal display device, comprising:

a pair of substrates, at least one of which is transparent;

a liquid crystal layer placed between the pair of substrates;

an electrode group, formed on at least one of the pair of substrates, for applying an electric field to the liquid crystal layer; and

an alignment control film placed on at least one of the pair of substrates,

wherein the alignment control film is formed of polyimide and a precursor of the polyimide,

each of the polyimide and the precursor of the polyimide being obtained from a cyclobutanetetracarboxylic acid dianhydride derivative represented by the following chemical formula (I) and aromatic diamine as reactants, and

the alignment control film is provided with alignment capability by photo-alignment treatment:

where at least one of Z 1 to Z 4 is a substituent represented by —NR 2 , —SR, —OH, —C(═O)—R, —(CH 2 ) n —COOR, —CN, or —NO 2 (R's each independently represent a hydrogen atom or an alkyl group having a carbon number of 1 to 4, and n represents an integer of 0 to 2), and the others are hydrogen atoms,

wherein the aromatic diamine contains at least one kind of aromatic diamines selected from a compound group represented by the following chemical formulae (102), (103), (104), (105), (106), (109) and (110):

where X's each independently have any one of the following structures: —CH 2 —, —CO—, —O—, —NH—, —CO—NH—, —S—, —SO—, and —SO 2 —.