Liquid crystal display device

A liquid crystal display device comprising:

• thin film transistors;
• a TFT substrate having an alignment film formed over pixels where pixel electrodes are formed over a common electrode by way of an interlayer insulating film;
• a counter substrate opposed to the TFT substrate, the counter substrate having another alignment film formed over a color filter;
• and
• liquid crystals put between the alignment film of the TFT substrate and the alignment film of the counter substrate;
• wherein
• the alignment film comprises a first alignment film in contact with a liquid crystal layer and a second alignment film formed below the first alignment film,
• the first alignment film is formed of a polyamide acid ester as a precursor, and
• the second alignment film is formed of a polyamide acid, as a precursor, for which PMDA is not used as a starting material, with the thickness of the interlayer insulating film being 770 nm or more.

A liquid crystal display device comprising:

• thin film transistors;
• a TFT substrate having an alignment film formed over pixels where pixel electrodes are formed over a common electrode by way of an interlayer insulating film;
• a counter substrate opposed to the TFT substrate, the counter substrate having another alignment film formed over a color filter;
• and
• liquid crystals put between the alignment film of the TFT substrate and the alignment film of the counter substrate;
• wherein the alignment film comprises a first alignment film in contact with a liquid crystal layer and a second alignment film formed below the first alignment film, and
• wherein, when a DC voltage is applied between the counter substrate and the pixel electrode while light is irradiated at the back of the liquid crystal display device,
• the following ratio T1/T2 is defined as 3 or less,
• assuming the brightness just after the application of the DC voltage as B1, and the brightness when the brightness is subsequently settled as B2, and
• assuming a time when the brightness settles from the initial brightness B1 to a brightness:
• B2+(B1−B2)×0.368 as T, where
• T is T1 for the brightness of light at I, and
• T is T2 for the brightness of light at I×10.