公开(公告)号：US11131896B2

公开(公告)日：2021-09-28

申请号：US16369549

申请日：2019-03-29

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Yasushi Hayashida ,  Akiko Nagai ,  Koichi Makidai

IPC: G02F1/137 ,  G02F1/133 ,  G02F1/1347 ,  G02F1/1334 ,  G02F1/1343 ,  G03B7/26 ,  G03B9/08

Abstract: A light control sheet including a first transparent electrode, a second transparent electrode, a first light control layer positioned between the first and second transparent electrodes, and having light transmission property which is variable by a change in a voltage across the first and second transparent electrodes, and a voltage control unit which applies an AC voltage across the first and second transparent electrodes, and changes a frequency of the AC voltage applied.

公开(公告)号：US10921656B2

公开(公告)日：2021-02-16

申请号：US16152543

申请日：2018-10-05

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Tetsushi Yoshida ,  Koichi Makidai ,  Akiko Nagai

IPC: G02F1/1343 ,  G02F1/1334 ,  E06B9/24 ,  G02F1/1345 ,  G02F1/13 ,  G02F1/133 ,  G02F1/1333 ,  G02F1/155

Abstract: A light control module including a light control sheet and a drive circuit that applies a voltage to a first electrode and a second electrode of the light control sheet. The light control sheet includes a light control layer switchable between a transparent state and an opaque state according to an applied voltage. The light control sheet has a feeding area for applying a voltage to the first and second electrodes. The light control sheet is formed such that when the light control sheet receives a voltage that causes a transmittance of the light control sheet to be equivalent to a Munsell value of 90% in a region closest to the feeding area, the light control sheet has a transmittance equivalent to a Munsell value of 50% in a region farthest from the feeding area, where a Munsell value of 100% is a maximum transmittance of the light control sheet.