Patent ID: 8767156

Claim:
A production method of a liquid crystal display device, the liquid crystal display device comprising: a pair of opposed substrates; a liquid crystal layer formed between the pair of opposed substrates; and a horizontal alignment film arranged on a liquid crystal layer side surface of at least one of the pair of opposed substrates, wherein the production method comprises an exposure step of exposing the horizontal alignment film in such a way that a substrate plane is divided into two or more exposure regions and each of the exposure regions is exposed through a photomask having transmissive parts and a shielding part, in the exposure step, exposure is performed while scanning a combination of a light source and the photomask and/or the substrate to be exposed in such a way that adjacent two exposure regions have an overlapping exposure region where the adjacent two exposure regions partly overlap with each other, the photomask has a halftone part, the halftone part includes a transmissive part having an aperture ratio smaller than that of a transmissive part in a part other than the halftone part, and the halftone part is arranged corresponding to the overlapping exposure region.