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:
Apr. 14, 2020
Filed:
Jun. 26, 2019
Fujifilm Corporation, Tokyo, JP;
Yukito Saitoh, Kanagawa, JP;
Daisuke Kashiwagi, Kanagawa, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
The optical film is an optical film including a cholesteric liquid crystal layer, in which first regions having a first film thickness and second regions having a second film thickness which is smaller than the first film thickness are alternately arranged with a period P of 0.5 μm to 2.0 μm in at least one direction in a plane, a difference in film thickness between the first film thickness and the second film thickness is in a range of 0.2 μm to 1.0 μm, and a helical pitch of a cholesteric phase in the first region is different from a helical pitch of a cholesteric phase in the second region.