LIGHT REUSE SHEET, SOLAR BATTERY MODULE, AND LIGHT SOURCE MODULE

摘要

A light reuse sheet includes a reflection plane (100) with a concavo-convex shape for reflecting light, which has entered a solar battery module (200), in such a manner that the light enters a solar battery cell (1), or reflecting light emitted from a light-emitting element (50) of a light source module (300).  When the dimension in the lateral direction of the solar battery cell (1) or the light-emitting element (50) is denoted by Lx, the dimension in the longitudinal direction of the solar battery cell (1) or the light-emitting element (50) is denoted by Ly, the angle formed by the direction of the concavo-convex shape of the reflection plane (100) and the edge in the lateral direction of the solar battery cell (1) or the light-emitting element (50) is denoted by f, and the maximum width of light which is transmitted between the adjacent solar battery cells (1) and reflected by the light reuse sheet (12), and enters the light-receiving plane (1a) of the solar battery cell (1), or the maximum width of light which is not emitted in a specific direction from the light-emitting element (50) but emitted in the specific direction after being reflected by the light reuse sheet (12) is denoted by A, the reflection plane (100) satisfies expression (1).