Liquid crystal display device

A liquid crystal display device comprising:

• paired substrates disposed to face each other;
• a liquid crystal layer disposed between the paired substrates;
• and
• an alignment film disposed between at least one of the substrates and the liquid crystal layer,
• the at least one of the substrates including an electrode and/or a conductive line that contain(s) copper or aluminum, in direct contact with the alignment film,
• the liquid crystal layer containing a liquid crystal component and an additive component with a chemical structure including a benzotriazole group represented by the following chemical formula (1):
• wherein the chemical structure includes a structure represented by the following chemical formula (2):
• wherein R1 represents a —O— group, —S— group, —NH— group, —CO— group, —COO— group, —OOO— group, —NHCO— group, —CONH— group, —CH2— group, —CF2— group, or direct bond;
• R2 represents —R3-Bt, a hydrogen atom, halogen atom, —CN group, —NO2 group, —NCO group, —NCS group, —OCN group, —OH group, or C1-C18 linear or branched alkyl group;
• and Bt is represented by the following chemical formula (1):
• wherein R3 represents a C1-C18 linear or branched alkylene group;
• a hydrogen atom in R3 may be replaced with a fluorine atom or chlorine atom;
• A1 and A2 are the same as or different from each other and each represent a 1,4-phenylene group, naphthalene-1,4-diyl group, naphthalene-2,6-diyl group, 1,4-cyclohexylene group, or C2-C18 alkyl, alkylene, unsaturated alkyl, or unsaturated alkylene group;
• —CH2— groups contained in A1 and A2 may each be replaced with a —O— group or —S— group, unless they are adjacent to each other;
• at least one of hydrogen atoms in A1 and A2 may be replaced with a fluorine atom, chlorine atom, —CN group, or C1-C6 alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, or alkylcarbonyloxy group;
• Z represents a —O— group, —S— group, —NH— group, —CO— group, —COO— group, —OOO— group, —NHCO— group, —CONH— group, —CH2— group, —CF2— group, or direct bond;
• and n represents 0, 1, or 2;
• wherein the liquid crystal molecules in the liquid crystal component have a negative or a positive anisotropy of dielectric constant, and
• the alignment film includes a polymer that contains a carboxyl group or a —OCO— ester bond in a side chain.