Liquid crystal display device
View Patent ↗A liquid crystal display device includes a pixel electrode substrate including a pixel electrode and a counter electrode formed thereon; a counter substrate provided to face the pixel electrode substrate; and a liquid crystal interposed between the pixel electrode substrate and the counter substrate, the liquid crystal display device being of a mode that rotates liquid crystal molecules substantially in parallel to the pixel electrode substrate. In the display device, an initial alignment direction of the liquid crystal molecules is parallel to an extension direction of at least one of the pixel electrode and the counter electrode, and a pixel includes at least one convex portion or concave portion that has a long and narrow shape and whose longitudinal direction has an oblique angle with respect to the initial alignment direction of the liquid crystal molecules in the same direction as a desired liquid crystal rotation direction.
1. A liquid crystal display device comprising:
a pixel electrode substrate including a pixel electrode and a counter electrode formed thereon;
a counter substrate provided to face the pixel electrode substrate; and
a liquid crystal interposed between the pixel electrode substrate and the counter substrate, the liquid crystal display device being of a mode that rotates liquid crystal molecules substantially in parallel to the pixel electrode substrate,
wherein
an initial alignment direction of the liquid crystal molecules is parallel to an extension direction of at least one of the pixel electrode and the counter electrode, and
the pixel electrode substrate includes a plurality of convex portions or concave portions that each have a long and narrow shape and a curvilinear cross-sectional surface and whose longitudinal direction has an oblique angle with respect to the initial alignment direction of the liquid crystal molecules in the same direction as a desired liquid crystal rotation direction, and
the at least one of the pixel electrode and the counter electrode crosses upper surfaces of the plurality of convex portions or concave portions facing the liquid crystal.
2. The liquid crystal display device according to claim 1 , wherein the pixel electrode and the counter electrode are comb-shaped electrodes whose extension portions are parallel to each other.
3. The liquid crystal display device according to claim 1 , wherein one of the pixel electrode and the counter electrode is a comb-shaped electrode and the other one thereof is a planar electrode.
4. The liquid crystal display device according to claim 1 , wherein the at least one convex portion or concave portion is provided on the counter substrate.
5. The liquid crystal display device according to claim 1 , wherein both of the pixel electrode substrate and the counter substrate include the plurality of convex portions or concave portions.
6. The liquid crystal display device according to claim 1 , wherein the plurality of convex portions or concave portions are provided in a continuous linear shape.
7. The liquid crystal display device according to claim 1 , wherein the plurality of convex portions or concave portions are formed at an insulation film of an uppermost layer on the pixel electrode substrate.