Display device including seal material with improved adhesion strength for bonding two substrates together

Patent metadata

Field	Value
Publication number	US-9304346-B2
Application number	US-201214112877-A
Country	US
Kind code	B2
Filing date	Apr 16, 2012
Priority date	Apr 22, 2011
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A display device includes: a first substrate and a second substrate which are located so that inner main surfaces thereof face each other; a liquid crystal layer located between the first substrate and the second substrate; a seal material located between the first substrate and the second substrate so as to surround the liquid crystal layer, the seal material bonding the first substrate and the second substrate to each other; an organic insulation film located in a seal formation area on the inner main surface of the second substrate, the organic insulation film having an opening section in the seal formation area; and an inorganic insulation film located to continue from an inside of the opening section to a surface of the organic insulation film through an inner wall surface of the opening section, the inorganic insulation film being directly covered with the seal material.

First claim

What is claimed is:

1. A display device, comprising:
a first substrate and a second substrate each of which has an inner main surface of the first substrate and an inner main surface of the second substrate facing each other;
a liquid crystal layer located between the first substrate and the second substrate;
a seal material located between the first substrate and the second substrate, the seal material surrounding the liquid crystal layer, the seal material bonding the first substrate and the second substrate;
a first organic insulation film located in a seal formation area in which the seal material on the inner main surface of the second substrate is positioned, the first organic insulation film having an opening section in the seal formation area;
a first inorganic insulation film directly covered with the seal material:
a second inorganic insulation film located on the inner main surface of the second substrate; and
a wiring conductor which is located and overlaps the seal formation area on the second insulation film,
wherein the opening section of the first organic insulation film is positioned on the wiring conductor and reaches the wiring conductor, and the first inorganic insulation film is located to continue from an upper side of the wiring conductor in the opening section to a surface of the first organic insulation firm through an inner wall surface of the opening section.

2. The display device according to claim 1 ,
wherein the first organic insulation film has a plurality of opening sections, and
the first inorganic insulation film is located to continue between opening sections adjacent to each other.

3. The display device according to claim 1 ,
wherein the seal formation area has a corner portion, and
the opening section is positioned in the corner portion of the seal formation area.

4. The display device according to claim 1 ,
wherein the first organic insulation film is located to continue from an inner area surrounded by the seal material to the seal formation area,
the display device further comprising:
a first display electrode located on the first organic insulation film in the inner area,
an interlayer insulation film located on the first organic insulation film, covering the first display electrode, the interlayer insulation film having a same main component as the first inorganic insulation film, and
a second display electrode located on the interlayer insulation film, the second display electrode generating an electric field between the first display electrode and the second display electrode.

5. The display device according to claim 1 ,
wherein the organic insulation film located in the seal formation area has a second opening section in the wiring conductor non-forming area in which the wiring conductor does not exist, and
the second inorganic insulation film is located on a bottom of the second opening section, and an upper surface of the second inorganic insulation film is in contact with the seal material.

6. The display device according to claim 1 , further comprising:
a second organic insulation film located in the seal formation area in which the seal material is located on the inner main surface of the first substrate, the second organic insulation film having a third opening section in the seal formation area, and
a third inorganic insulation film located to continue from the inside of the third opening section to the surface of the second inorganic insulation film through the inner wall surface of the third opening section, the third inorganic insulation film being directly covered with the seal material.

Assignees

• Ichimura Teruhiko
• Sakai Hideaki
• Kitamura Shigeki
• Ito Hiroaki
• Kyocera Corp

Inventors

• Ichimura Teruhiko
• Sakai Hideaki
• Kitamura Shigeki
• Ito Hiroaki

Classifications

• G02F1/1339

  Gaskets; Spacers; Sealing of cells · CPC title

• G02F1/133345 Primary

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• G02F2201/503

  Arrangements improving the resistance to shock · CPC title

• G02F2001/134372

  Physics · mapped topic