Patent ID: 8676017

Claim:
A light control element comprising: a first dielectric layer placed on a substrate; three or more silicon thin-film layers placed on the first dielectric layer; a second dielectric layer placed between the three or more silicon thin-film layers; and a third dielectric layer placed to surround the silicon thin-film layers and the second dielectric layer, wherein the three or more silicon thin-film layers are arranged to partially overlap with one another, the second dielectric layer is arranged between the silicon thin-film layers in a part where the silicon thin-film layers overlap, and in the three or more silicon thin-film layers, the silicon thin-film layers adjacent to each other have different conductivity types, wherein, of the three or more silicon thin-film layers, a thickness of a silicon thin-film layer in a part where electric field strength of light is high is thinner than a thickness of a silicon thin-film layer in another part.