Liquid crystal display device and method of manufacturing that
View Patent ↗A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d 2 ” of the second alignment film over the projecting portion and a film thickness “d 1 ” of a portion of the first alignment film facing the projecting portion satisfy formula (1) and (2): 0 nm<d2<30 nm (1); d2<d1 (2).
1. A liquid crystal display device comprising:
a first substrate;
a first alignment film formed over the first substrate;
a second substrate;
a second alignment film formed over the second substrate;
a liquid crystal layer sandwiched between the first alignment film and the second alignment film;
a projecting portion formed over the second substrate;
a first electrode and a second electrode formed between the first alignment film and the first substrate; and
an insulation film disposed between the second electrode and the liquid crystal layer;
wherein the first electrode is covered by the first alignment film;
wherein the insulation film is covered by the first alignment film;
wherein the liquid crystal layer is controlled by an electric field generated between the first electrode and the second electrode;
wherein the first alignment film is a photo alignment film; and
wherein a thickness “d 2 ” of the second alignment film over the projecting portion and a film thickness “d 1 ” of a portion of the first alignment film facing the projecting portion satisfy formula (1) and (2):
0 nm<d2<30 nm (1);
d2<d1 (2).
2. A liquid crystal display device according to claim 1 ,
wherein the second electrode is a planar electrode, and the first electrode is a linear electrode which is disposed between the second electrode and the liquid crystal layer.
3. A liquid crystal display device according to claim 1 , further comprising a small projection disposed between the projecting portion and the first substrate;
wherein the small projection has a height smaller than a height of the projecting portion, and the film thickness “d 1 ” of the first alignment film is provided over the small projection.
4. A liquid crystal display device comprising:
a first substrate;
a first alignment film formed over the first substrate;
a second substrate;
a second alignment film formed over the second substrate;
a liquid crystal layer sandwiched between the first alignment film and the second alignment film;
a projecting portion formed over the second substrate;
a first electrode and a second electrode formed between the first alignment film and the first substrate; and
an insulation film disposed between the second electrode and the liquid crystal layer;
wherein the first electrode is covered by the first alignment film;
wherein the insulation film is covered by the first alignment film;
wherein the liquid crystal layer is controlled by an electric field generated between the first electrode and the second electrode;
wherein the second alignment film is a photo alignment film; and
wherein a film thickness “d 2 ” of the second alignment film over the projecting portion and a film thickness “d 1 ” of a portion of the first alignment film facing the projecting portion satisfy formula (1) and formula (2):
0 nm<d2<30 nm (1);
d2<d1 (2).
5. A liquid crystal display device according to claim 4 ,
wherein the second electrode is a planar electrode, and the first electrode is a linear electrode which is disposed between the second electrode and the liquid crystal layer.
6. A liquid crystal display device according to claim 4 , further comprising a small projection disposed between the projecting portion and the first substrate;
wherein the small projection has a height smaller than a height of the projecting portion, and the film thickness “d 1 ” of the first alignment film is provided over the small projection.
7. A liquid crystal display device according to claim 1 ,
wherein the first alignment film is formed from a material having a skeleton of cyclobutane tetracarboxylic acid.
8. A liquid crystal display device according to claim 3 , further comprising:
a gate line, a thin film transistor, and a stacked structure constituted of a semiconductor layer and a metal layer;
wherein the gate line overlaps with the thin film transistor and the stacked structure; and
wherein the small projection includes the stacked structure.
9. A liquid crystal display device according to claim 4 ,
wherein the first alignment film formed from a material having a skeleton of cyclobutane tetracarboxylic acid.
10. A liquid crystal display device according to claim 6 , further comprising;
a gate line, a thin film transistor, and a stacked structure constituted of a semiconductor layer and a metal layer;
wherein the gate line overlaps with the thin film transistor and the stacked structure; and
wherein the small projection includes the stacked structure.