| abstract |
To provide a liquid crystal display device, whereby transparency when no voltage is applied and scattering properties when a voltage is applied, are good, adhesion between a liquid crystal layer and a vertical liquid crystal alignment film is high, and its lifespan is long even in a severe environment. The liquid crystal display device has a liquid crystal layer formed by disposing a liquid crystal composition containing a liquid crystal and a polymerizable compound between a pair of substrates provided with electrodes, and irradiating and curing the composition with ultraviolet rays by an ultraviolet irradiation apparatus, and at least one of the substrates is provided with a liquid crystal alignment film to vertically align a liquid crystal, wherein the ultraviolet irradiation apparatus is an ultraviolet irradiation apparatus capable of controlling the irradiation light intensity and wavelength of the ultraviolet rays to be irradiated and the surface temperature of the pair of the substrates, the liquid crystal composition contains a compound represented by the formula [1], and the liquid crystal alignment film is a liquid crystal alignment film obtained from a liquid crystal alignment treating agent containing a polymer having a side chain structure represented by the formula [2-1] or formula [2-2]. n X 1 -X 2 -X 3 -X 4 -X 5 -X 6 X 7 p X 8 [1]n n (X 1 is a specific side chain structure; X 2 , X 3 , X 4 and X 6 are each a single bond, etc.; X 5 and X 7 are each a benzene ring, etc.; p is an integer of from 0 to 4; and X 8 is a C 1-18 alkyl group, etc.), n —Y 1 -Y 2 -Y 3 -Y 4 Y 5 n Y 6 [2-1]n n (Y 1 , Y 2 and Y 3 are each a single bond; Y 4 and Y 5 are each a benzene ring, etc.; n is from 0 to 4; and Y 6 is a C 1-18 alkyl group, etc., n —Y 7 -Y 8 [2-2]n n (Y 7 is a single bond; and Y 8 is a C 8-22 alkyl group, etc.). |