Liquid crystal display device
View Patent ↗The present invention provides a liquid crystal display device realizing improved reliability by preventing occurrence of a pixel defect. A liquid crystal display includes first and second substrates. A spacer maintains a distance between the first and second glass substrates. A liquid crystal layer is provided between the first and second substrates. A pixel electrode film and a common electrode film are formed over a base insulation film of the first substrate so as to sandwich a pixel insulation film in between. The common electrode film, the pixel electrode film or both of them are partly removed in a region corresponding to the spacer, and the pixel insulation film is partly removed in that region. It prevents the film structure from being broken due to deformation of the base insulation film made of a soft material caused by a pressure applied onto the spacer.
1. A liquid crystal display device comprising:
a first substrate having a common electrode film formed on a base insulation film and a pixel electrode film formed over the common electrode film via a pixel insulation film;
a second substrate disposed on a side of the pixel electrode film so as to face the first substrate;
a liquid crystal layer provided between the first substrate and the second substrate; and a spacer defining a distance between the first and second substrates, wherein,
either the common electrode film or the pixel electrode film or both of them are partly removed in a region corresponding to the spacer,
the pixel insulation film is partly removed in the region corresponding to the spacer
inside of a hole formed in the region in which the pixel insulation film and the common electrode film are partly removed is covered with the pixel electrode film, and
one of end faces of the spacer is in contact with the pixel electrode film at a bottom face of the hole.
2. A liquid crystal display device comprising:
a first substrate having a common electrode film formed on a base insulation film and a pixel electrode film formed over the common electrode film via a pixel insulation film;
a second substrate disposed on a side of the pixel electrode film so as to face the first substrate;
a liquid crystal layer provided between the first substrate and the second substrate; and
a spacer defining a distance between the first and second substrates, wherein,
both of the common electrode film and the pixel electrode film are partly removed in the region corresponding to the spacer,
the pixel insulation film is partly removed in the region corresponding to the spacer,
the base insulation layer is exposed at a bottom of a hole formed in the region in which the pixel electrode film, the pixel insulation film, and the common electrode film are partly removed, and
one of end faces of the spacer is in contact with the base insulation layer exposed at the bottom of the hole.
3. A liquid crystal display device comprising:
a first substrate having a common electrode film formed on a base insulation film and a pixel electrode film formed over the common electrode film via a pixel insulation film;
a second substrate disposed on a side of the pixel electrode film so as to face the first substrate;
a liquid crystal layer provided between the first substrate and the second substrate; and a spacer defining a distance between the first and second substrates, wherein,
both of the common electrode film and the pixel electrode film are partly removed in the region corresponding to the spacer,
the pixel insulation film is partly removed in the region corresponding to the spacer, and
the base insulation layer is also partly removed in the region corresponding to the spacer.
4. A liquid crystal display device comprising:
a first substrate having a common electrode film formed on a base insulation film and a pixel electrode film formed over the common electrode film via a pixel insulation film;
a second substrate disposed on a side of the pixel electrode film so as to face the first substrate;
a liquid crystal layer provided between the first substrate and the second substrate; and
a spacer defining a distance between the first and second substrates, wherein,
either the common electrode film or the pixel electrode film or both of them are partly removed in a region corresponding to the spacer,
the pixel insulation film is partly removed in the region corresponding to the spacer,
a common electrode film hole formed in the region in which the common electrode film is partly removed or a pixel electrode film hole formed in the region in which the pixel electrode film is partly removed is larger than a pixel insulation film hole formed in the region in which the pixel insulation film is partly removed, and
the relationship d 1 >t is satisfied, where “d 1 ” is a distance from an edge of the common electrode film hole or the pixel electrode film hole to an edge of the pixel insulation film hole, and “t” is a thickness of the pixel insulation film.