LIGHTING SHEET, LIGHTING DEVICE, AND BUILDING

摘要

PROBLEM TO BE SOLVED: To provide a lighting sheet that can suppress direct radiation (direct incident light) of sunlight, achieves efficient lighting, and makes an outdoor side visible from an indoor side.SOLUTION: A lighting sheet 20 is disposed on an opening of a building, with a sheet surface set vertical; and the sheet includes a light-transmitting substrate layer 22 and a light-deflecting layer 23 that is formed on one surface of the substrate layer and deflects light. The light-deflecting layer includes: a plurality of light-transmitting portions 24 arranged along the one surface of the substrate layer and transmitting light; and light-deflecting portions 25 disposed among the plurality of the light-transmitting portions and filled with a material having a refractive index lower than that of the light-transmitting portions. In a posture of the lighting sheet disposed on an opening of a building, the light-deflecting portion is configured in such a manner that, on a cross section along a thickness direction of the lighting sheet, an upper side edge of the light-deflection portion is composed of a polygonal line including a plurality of connected straight lines and is formed to be convex downward. The downwardly convex figure of the upper edge is formed in such a manner that an inclination angle of a portion at an outdoor side with respect to a horizontal plane is larger than an inclination angle of a portion at an indoor side with respect to the horizontal plane.