LIQUID CRYSTAL DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF

摘要

The present invention prevents the shaving of an alignment film caused by a columnar spacer in a liquid crystal display device of an IPS method using photo-alignment. A plinth higher than a pixel electrode is formed at a part where a columnar spacer formed over a counter substrate touches a TFT substrate. When an alignment film of a double-layered structure is applied over the pixel electrode and the plinth, the thickness of the alignment film over the plinth reduces by a leveling effect. When photo-alignment is applied in the state, a photodegraded upper alignment film over the plinth disappears and a lower alignment film having a high mechanical strength remains. As a result, it is possible to prevent the shaving of the alignment film.

主权项

1. A liquid crystal display device comprising:
a TFT substrate and a counter substrate; a liquid crystal layer disposed between the TFT substrate having a pixel electrode and the counter substrate having an overcoat film; a spacer formed on the overcoat film and contacting with the TFT substrate; and an alignment film formed on the spacer and the overcoat film, wherein the spacer has a first portion; the overcoat film has a second portion facing the pixel electrode; a distance from the counter substrate to a protruding surface of the spacer at the first portion is greater than a distance from the counter substrate to a surface of the overcoat film at the second portion, wherein the alignment film comprises a first part subjected to photo-alignment treatment formed by a first precursor, wherein the alignment film comprises a second part formed by a second precursor, and wherein the first part is disposed between the second part and the liquid crystal layer, when the thickness of the second part is defined as p1 and the thickness of the first part is defined as p2, p2/p1 over the first portion is smaller than p2/p1 over the second portion.