Liquid crystal display device
View Patent ↗A TFT substrate and a counter substrate are bonded via a seal material. Alignment films are applied to entire surfaces of the TFT substrate and the counter substrate so as to realize even thickness of the alignment film. This allows a display region to be formed up to the area around the seal material. The alignment film is photo-alignment processed. An organic film formed of the material which is not photo-aligned is interposed between the alignment film and the seal material. High bonding strength between the organic film and the seal material improves reliability of a seal portion as well as reduces a frame region.
1. A liquid crystal display device having a TFT substrate with a first alignment film and a counter substrate with a second alignment film bonded via a seal material, a liquid crystal interposed between the TFT substrate and the counter substrate, and a distance between the TFT substrate and the counter substrate regulated by a columnar spacer,
an alignment film barrier formed at a side of the counter substrate,
wherein the first alignment film is applied to a surface of the TFT substrate, and an organic film that is different from the first alignment film is interposed between the first alignment film and the seal material at a side of the TFT substrate;
wherein the alignment film is overlapped with the seal material;
the first alignment film and the second alignment film are photo-alignment processed, and the organic film contains no component to be photo-aligned, and
the alignment film barrier is formed on the counter substrate to be overlapped with the seal material.
2. The liquid crystal display device according to claim 1 , wherein the alignment film barrier is formed by a same material as the columnar spacer.
3. The liquid crystal display device according to claim 1 , wherein a shape of the alignment film barrier is a wall-like shape or a closed bank-like shape.
4. A liquid crystal display device having a TFT substrate with a first alignment film and a counter substrate with a second alignment film bonded via a seal material, and a liquid crystal interposed between the TFT substrate and the counter substrate,
wherein the first alignment film applied to the TFT substrate is formed on a display region, and a first mixture film that is different from the alignment film is interposed between the seal material and the TFT substrate;
the second alignment film applied to the counter substrate is formed on the display region, and a second mixture film that is different from the alignment film is interposed between the seal material and the counter substrate; and
the first alignment film and the second alignment film are photo-alignment processed, and the first mixture film is formed by mixing a material for forming the first alignment film and a material for forming a first organic film with no component to be photo-aligned, and the second mixture film is formed by mixing a material for forming the second alignment film and a material for forming a second organic film with no component to be photo-aligned.
5. The liquid crystal display device according to claim 4 , wherein the same material is used for forming the first and the second alignment films, the same material is used for forming the first and the second organic films, a content of the photo-aligned component of the first mixture film is smaller than 20%, and a content of the photo-aligned component of the second mixture film is smaller than 20%.
6. A liquid crystal display device having a TFT substrate with a first alignment film and a counter substrate with a second alignment film bonded via a seal material, a liquid crystal interposed between the TFT substrate and the counter substrate, and a distance between the TFT substrate and the counter substrate regulated by a columnar spacer
wherein the first alignment film applied to the TFT substrate is formed on a display region, and a first mixture film that is different from the alignment film is interposed between the seal material and the TFT substrate;
the first mixture film is obtained by mixing a material for forming the first alignment film and a material for forming a first organic film with no component to be photo-aligned;
an outline of the second alignment film at the side of the counter substrate is regulated by an alignment film barrier formed of the same material for forming the columnar spacer; and
the first alignment film and the second alignment film are photo-alignment processed.
7. The liquid crystal display device according to claim 6 , wherein a content of a component to be photo-aligned of the first mixture film is smaller than 20%.