公开(公告)号：US20190049809A1

公开(公告)日：2019-02-14

申请号：US16162967

申请日：2018-10-17

Applicant: AGC Inc.

Inventor： Takuji OYAMA ,  Teppei KONISHI ,  Shinya TAHARA ,  Hiroshi KUMAI

IPC: G02F1/15 ,  G02F1/153 ,  G02F1/157

Abstract: An electrochromic element which suppresses ripples in a color-reduction state and with which good visible light transmittance can be obtained is provided. An electrochromic element 100 includes: a transparent electrolyte layer 110; a pair of solid electrochromic layers which sandwiches the transparent electrolyte layer and is constituted by a pair of a reduction coloring-type solid electrochromic layer 120 and an oxidation coloring-type solid electrochromic layer 130 opposing each other, and a pair of transparent conductive films 140, where in the thickness and refractive indexe with respect to light at a wavelength of 550 nm about the transparent electrolyte layer 140, the reduction coloring-type solid electrochromic layer 120 and the oxidation coloring-type solid electrochromic layer 130, those values are provided so as to satisfy predetermined relations to suppress the ripples.