CPC G02F 1/133526 (2013.01) [G02F 1/133562 (2021.01); G02F 1/133607 (2021.01); G02B 3/08 (2013.01)] | 16 Claims |
1. A planar optical sheet that is made of a plurality of laminated layers, the planar optical sheet comprising:
an optical functional layer that is one of a plurality of the laminated layers; and
an optical element layer that is another one of a plurality of the laminated layers,
wherein the optical functional layer has a plurality of light transmissive portions each having a trapezoidal cross section, and extending in one direction, the light transmissive portions being arranged at intervals in a direction different from the one direction, and a light absorbing portion that is arranged between respective adjacent light transmissive portions,
wherein the optical element layer extends so as to be offset from the one direction at an angle of 1° to 10° in a front view of the optical sheet, the optical element layer having a plurality of unit optical elements that are ridges aligned in a direction different from a direction in which the optical element layer extends,
wherein each of the unit optical elements has a triangular cross section having a main refracting face and a rise face, and
wherein the main refracting face is a face inclining in a direction of a normal line of a light exiting face of the optical functional layer at more than 45° and no more than 89°.
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