Patent ID: 9719644
Date: 2017-08-01
CPC Classifications: E06B,F21S,F21V

Claim:
1. A daylighting system comprising: a sheet-like light control member disposed on at least an upper part of a daylighting opening, the light control member being configured to change upward a traveling direction of incident light and allow the incident light to pass therethrough; and a shade disposed oppositely with respect to at least a part of the daylighting opening that is below the upper part of the daylighting opening where the light control member is disposed, wherein the light control member includes transparent first portions that extend in a first direction that is nonparallel with respect to an up and down direction and that are arranged in a second direction that is nonparallel with respect to the first direction, and second portions that are arranged along the second direction alternately with the first portions, the second portions having a refractive index that is different from that of the first portions, and wherein in a plane along a normal direction to the light control member and the second direction, an angular range including an outgoing direction of light going out from the light control member, the light having been totally reflected on an interface between the first portions and the second portions and passed though the light control member, is smaller than an angular range including an incident direction of the light incident on the light control member.