Patent ID: 9229273
Filing Date: 2016-01-05
CPC Classification: G02F,H04N

Claim Text:
1. A reflection type liquid crystal device, comprising: a pair of substrates; an optical compensation plate disposed outside the pair of substrates, having a negative refractive-index anisotropy, and having a first optical axis along the thickness direction of the optical compensation plate; a liquid crystal cell held between the pair of substrates and having a pretilt at which a second optical axis of a liquid crystal molecule of the liquid crystal cell is inclined with respect to a plate surface of the liquid crystal cell; and a tilt mechanism configured to tilt the optical compensation plate continuously relative to the liquid crystal cell and configured to rotate toward a first direction and a second direction about an axis of rotation, wherein the axis of rotation is not disposed in a plane of the optical compensation plate, but disposed at a shifted position, the first direction is a direction in which a standard angle becomes larger, the second direction is an opposite direction to the first direction, the standard angle is defined as an acute angle formed between the first optical axis and the second optical axis when the optical compensation plate is located so as to be parallel to the plate surface of the liquid crystal cell, the liquid crystal cell has at least one contrast peak by tilting the optical compensation plate along with the first direction and the second direction respectively, and the tilt mechanism is configured to tilt the optical compensation plate toward a direction along with the first direction or the second direction, so as to have a contrast peak by smaller rotation angle from the optical compensation plate parallel to the plate surface of the liquid crystal cell.