Patent ID: 8873006
Filing Date: 2014-10-28
Classification: G02F

Abstract:
1. A liquid crystal display device comprising: pixels formed in regions surrounded by scanning lines extending in a first direction and arrayed in a second direction and picture signal lines extending in the second direction and arrayed in the first direction; a pixel electrode formed at each of the pixels over an insulation film and a passivation film; a TFT substrate supplying a picture signal to each of the pixel electrodes through a TFT; a counter substrate formed opposite the TFT substrate; and a liquid crystal layer interposed between the TFT substrate and the counter substrate, wherein a columnar spacer to retain a space from the TFT substrate is formed over the counter substrate; a plinth facing a tip of the columnar spacer is formed over the TFT substrate and an alignment film is formed so as to cover the plinth, the pixel electrodes, the insulation film, and the passivation film; photo-alignment treatment is applied to the alignment film; a top end of the plinth is higher than top ends of the pixel electrodes; the alignment film includes a lower alignment film formed by using polyamide acid as a precursor and an upper alignment film formed by using polyamide acid ester as a precursor; when the thickness of the lower alignment film is defined as p1 and the thickness of the upper alignment film is defined as p2, p2/p1 over the plinth is smaller than p2/p1 over the insulation film; and wherein p2/(p1+p2) is 0.3 or less over the plinth.