Liquid crystal display device
A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.
1. A liquid crystal display device comprising:
a transistor substrate including;
a thin film transistor having a source electrode,
an organic insulating film formed on the thin film transistor,
a common electrode formed on the organic insulating film,
an interlayer insulating film formed on the common electrode, and
a pixel electrode formed on the interlayer insulating film and connected to the source electrode,
wherein the organic insulating film is formed to surround a contact portion where the source electrode and the pixel electrode are connected,
the common electrode has a hole corresponding to the contact portion, and
in a plan view, the contact portion is located between non-formation parts of the pixel electrode in the hole.
2. The liquid crystal display device according to claim 1 ,
wherein the pixel electrode has a slit, and
the slit is one of the non-formation parts.
3. The liquid crystal display device according to claim 1 , further comprising a scanning line driving the thin film transistor, and
a video signal line electrically connected to the source electrode,
wherein the scanning line extends in a first direction, and
the video signal line extends in a second direction crossing the first direction.
4. The liquid crystal display device according to claim 3 ,
wherein the pixel electrode has an edge located between the contact portion and the scanning line, and
the edge is one of the non-formation parts.
5. The liquid crystal display device according to claim 4 ,
wherein the contact portion and the non-formation parts are arranged in the second direction.
6. The liquid crystal display device according to claim 1 , further comprising a photo-alignment film aligning the liquid crystal layer,
wherein the photo-alignment film covers the contact portion.
7. The liquid crystal display device according to claim 1 ,
wherein the hole is greater than the contact portion in a plan view.
8. The liquid crystal display device according to claim 1 ,
wherein the organic insulating film is in contact with the interlayer insulating film at the hole.