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.

公开(公告)号：US11442322B2

公开(公告)日：2022-09-13

申请号：US16877644

申请日：2020-05-19

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Tetsushi Yoshida

IPC: G02F1/1334 ,  G02F1/137 ,  B60J1/00 ,  B60J3/04 ,  B60J3/06 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1343 ,  B60J1/08 ,  B60J1/18

Abstract: A light control sheet including a light control layer sandwiched between first and second orientation layers and including a polymer network in which domains are dispersed and filled with a liquid crystal composition including a liquid crystal molecule and a dichroic dye, a pair of transparent electrodes sandwiching the orientation layers, and a polarizing layer positioned on an opposite side of the first orientation layer to the light control layer. The light control layer has a transmittance that increases upon application of a driving voltage to the pair of transparent electrodes. When the driving voltage is not applied between the transparent electrodes, the orientation layers orient the liquid crystal molecule and the dichroic dye horizontally to the orientation layers and orient an orient absorption ax of the dichroic dye to cross an absorption axis of the polarizing layer as viewed in a thickness direction of the light control layer.

公开(公告)号：US11029551B2

公开(公告)日：2021-06-08

申请号：US16791678

申请日：2020-02-14

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Tetsushi Yoshida

IPC: G02F1/1334 ,  G02F1/1335

Abstract: A light control device including a first transparent electrode, a second transparent electrode, a light control layer sandwiched vertically between the first transparent electrode and the second transparent electrode and including a polymer network in which domains each filled with a liquid crystal composition are dispersed, and a pair of polarizing layers sandwiching the light control layer and positioned in a crossed Nicols relationship. The liquid crystal composition includes liquid crystal molecules that change to a vertical orientation upon application of a driving voltage to the light control layer.