Patent ID: 7388634
Filing Date: 2008-06-17
Classification: G02B,G02F

Abstract:
1. A reflector formed with a plurality of concave portions on one surface of a base member, each concave portion comprises of a curved surface; wherein, when defining a section passing through a deepest point of the concave portion as a first section and defining a section perpendicular to the first section at the deepest point as a second section, the concave portions have symmetrical shapes on the basis of the first section and have asymmetrical shapes on the basis of the second section, and wherein, when defining directions along the first section in each of the concave portions as axis directions, the axis directions are set to two or more directions, wherein, when defining the direction that each of the concave portions face as arrangement directions, the arrangement direction of each of the concave portions is in substantially the same direction, wherein, when defining an angle between the axis direction of the concave portions and an arrangement direction of pixels as an axis angle, the concave portions comprise a plurality of first concave portions having the axis angle of θ wherein the axis angle of θ wherein an absolute value of an average axis angle θ