LIGHT BEAM CONTROL MEMBER, LIGHT EMISSION DEVICE, ILLUMINATION DEVICE, AND DISPLAY DEVICE

摘要

This light beam control member (100) has: an entry surface (110) through which light emitted by a light-emitting element (240) enters; a total reflection surface (120) for reflecting a part of the light entering from the entry surface (110); an emission surface (130) through which a part of the light entering from the entry surface (110) and the light reflected by the total reflection surface (120) are emitted to the exterior; and a flange part (150) for reflecting a part of the light emitted from the emission surface (130). The flange part (150) is formed further outward, in the radial direction of the emission surface (130), than the emission surface (130) so as to be higher than the emission surface (130).