Patent ID: 8994908
Filing Date: 2015-03-31
Classification: G02F

Abstract:
1. A liquid crystal display device comprising: a TFT substrate including a display region where pixels each including a TFT and a pixel electrode are formed in a matrix and where a counter electrode is formed; a counter substrate bonded to the TFT substrate with a sealing material in a seal portion at a periphery thereof and including a display region where a light shielding film and color filters of three colors are formed, an overcoat film is formed so as to cover the color filters of three colors, and an alignment film is formed in direct contact with the overcoat film so as to cover the overcoat film, wherein the overcoat film has a first region covered by the alignment film and a second region not covered by the alignment film, wherein a first portion of the second region is in direct contact with the sealing material and a second portion of the second region is exposed from both the sealing material and the alignment film; and liquid crystal sealed between the TFT substrate and the counter substrate, wherein: in each pixel, transmittance of light is controlled by a voltage between the pixel electrode and the counter electrode; in the counter substrate, the alignment film, the first portion and the exposed second portion of the second region of the overcoat film are all subjected to irradiation during an alignment treatment of the alignment film using radiation, before the first portion of the second region of the overcoat film is covered by the sealing material, whereby the first portion and the exposed second portion of the second region of the overcoat film are degraded by the radiation; the alignment film is not formed in the seal portion, formed after the alignment treatment of the alignment film by covering the first portion of the second region of the overcoat film with the sealing material, so that the overcoat film is not covered by the alignment film in the seal portion of the counter substrate; and in the seal portion of the counter substrate, the light shielding film, a color filter of one color among the color filters of three colors, and the overcoat film are stacked in this order, and the sealing material is formed on the overcoat film.