Patent ID: 8599345
Filing Date: 2013-12-03
Classification: G02F

Abstract:
1. A liquid crystal display device, comprising: a vertical alignment type liquid crystal layer; a first substrate and a second substrate facing each other with the liquid crystal layer interposed therebetween; a first electrode provided in the first substrate on the liquid crystal layer side and a second electrode provided in the second substrate on the liquid crystal layer side; and a first alignment film provided between the first electrode and the liquid crystal layer and a second alignment film provided between the second electrode and the liquid crystal layer; wherein: the liquid crystal display device includes a plurality of pixel areas located in a matrix; each of the plurality of pixel areas includes a first liquid crystal domain in which a tilt direction of liquid crystal molecules at the center and in the vicinity thereof in a layer plane and in a thickness direction of the liquid crystal layer when a voltage is applied between the first electrode and the second electrode is a predetermined first direction, a second liquid crystal domain in which such a tilt direction is a predetermined second direction, a third liquid crystal domain in which such a tilt direction is a predetermined third direction and a fourth liquid crystal domain in which such a tilt direction is a predetermined fourth direction; a difference between any two among the first direction, the second direction, the third direction and the fourth direction is approximately equal to an integral multiple of 90°; the first liquid crystal domain is close to at least a part of edges of the first electrode, and the at least a part includes a first edge portion, wherein an azimuthal angle direction perpendicular to the first edge portion and directed to the inside of the first electrode has an angle exceeding 90° with respect to the first direction; the second substrate includes a first rib provided in an area corresponding to the first edge portion; the second liquid crystal domain is close to at least a part of the edges of the first electrode, and the at least a part includes a second edge portion, wherein an azimuthal angle direction perpendicular to the second edge portion and directed to the inside of the first electrode has an angle exceeding 90° with respect to the second direction; the third liquid crystal domain is close to at least a part of the edges of the first electrode, and the at least a part includes a third edge portion, wherein an azimuthal angle direction perpendicular to the third edge portion and directed to the inside of the first electrode has an angle exceeding 90° with respect to the third direction; the fourth liquid crystal domain is close to at least a part of the edges of the first electrode, and the at least a part includes a fourth edge portion, wherein an azimuthal angle, direction perpendicular to the fourth edge portion and directed to the inside of the first electrode has an angle exceeding 90° with respect to the fourth direction; the second substrate includes a second rib provided in an area corresponding to the second edge portion, a third rib provided in an area corresponding to the third edge portion, and a fourth rib provided in an area corresponding to the fourth edge portion; and wherein as seen from a frontal direction, the first rib is located such that the center thereof in a width direction substantially overlaps the first edge portion, the second rib is located such that the center thereof in the width direction substantially overlaps the second edge portion, the third rib is located such that the center thereof in the width direction substantially overlaps the third edge portion, and the fourth rib is located such that the center thereof in the width direction substantially overlaps the fourth edge portion.