Patent ID: 8643811

Claim:
A liquid crystal shutter component comprising: a first polarizer; a second polarizer; a liquid crystal layer provided between the first polarizer and the second polarizer; a first retardation layer provided between the first polarizer and the liquid crystal layer; a second retardation layer provided between the first polarizer and the first retardation layer; a third retardation layer provided between the second polarizer and the liquid crystal layer; and a fourth retardation layer provided between the second polarizer and the third retardation layer, wherein a projection axis of a longitudinal axis of a liquid crystal molecule of the liquid crystal layer to a plane perpendicular to a first direction directed from the second polarizer to the first polarizer is along a second direction perpendicular to the first direction, and a liquid crystal orientation of the liquid crystal layer transitions between a plurality of bend orientation states different from each other, created depending on a voltage applied to the liquid crystal layer, an acute angle made by a first absorbing axis of the first polarizer and the second direction is equal to an acute angle made by a third direction perpendicular to both of the first direction and the second direction, and the first absorbing axis, a second absorbing axis of the second polarizer is perpendicular to the first absorbing axis, a projection axis to the plane of a slow axis of the first retardation layer is perpendicular to the second direction, a projection axis to the plane of the slow axis of the third retardation layer is perpendicular to the second direction, a projection axis to the plane of the slow axis of the second retardation layer is perpendicular to the first absorbing axis, a retardation in a direction along the plane of the second retardation layer is 20 nm or more and 120 nm or less, a retardation along the first direction of the second retardation layer is 40 nm or more and 140 nm or less, a projection axis to the plane of the slow axis of the fourth retardation layer is perpendicular to the second absorbing axis, a retardation in the direction along the plane of the fourth retardation layer is 20 nm or more and 120 nm or less, a retardation along the first direction of the fourth retardation layer is 40 nm or more and 140 nm or less.