The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Oct. 11, 2024
Applicant:
Toppan Holdings Inc., Tokyo, JP;
Inventor:
Yuka Kurokawa, Taito-ku, JP;
Assignee:
TOPPAN HOLDINGS INC., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/1343 (2006.01); G02F 1/133 (2006.01); G02F 1/1334 (2006.01); G02F 1/1337 (2006.01); G02F 1/1341 (2006.01);
U.S. Cl.
CPC ...
G02F 1/13439 (2013.01); G02F 1/13306 (2013.01); G02F 1/1334 (2013.01); G02F 1/1337 (2013.01); G02F 1/1341 (2013.01);
Abstract
A first light control device includes a first light control sheet and a driving unit that applies voltage to the first light control sheet. The haze of the first light control sheet is 80% or more when the first voltage is applied, and the haze of the first light control sheet is less than 10% when the second voltage is applied. In the first light control sheet, the difference in lightness index L* between when the second and third voltages are applied is 20 or more, and the difference in color coordinate a* is 15 or more or the difference in color coordinate b* is 20 or more between when the second and third voltages are applied.