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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.:

US 11592703 B1

PDFFull Text
Date of Patent:
Feb. 28, 2023

Filed:

Jun. 27, 2022

Optical film comprising a stretched resin film and a liquid crystal layer including a polyfunctional compound having two or more polymerizable groups in one molecule, circularly polarizing plate, and image display apparatus

Applicant:

Fujifilm Corporation, Tokyo, JP;

Inventors:

Yuta Fukushima, Kanagawa, JP;

Keisuke Kodama, Kanagawa, JP;

Yoshinori Maeda, Kanagawa, JP;

Akira Maruyama, Kanagawa, JP;

Yuki Nakamura, Kanagawa, JP;

Shunya Katoh, Kanagawa, JP;

Yuta Takahashi, Kanagawa, JP;

Assignee:

FUJIFILM Corporation, Tokyo, JP;

Attorneys:

Edwards Neils LLC

Jean C. Edwards, Esq.

Primary Examiner:

Paul C Lee

Int. Cl.
CPC ...
G02F 1/1335 (2006.01); G02F 1/1337 (2006.01); G02B 5/30 (2006.01); C09D 125/06 (2006.01); C09D 123/08 (2006.01); C09K 19/20 (2006.01); C09K 19/32 (2006.01); C09K 19/58 (2006.01);
U.S. Cl.
CPC ...
G02F 1/133541 (2021.01); C09D 123/08 (2013.01); C09D 125/06 (2013.01); C09K 19/2007 (2013.01); C09K 19/32 (2013.01); C09K 19/588 (2013.01); G02B 5/3016 (2013.01); G02F 1/1337 (2013.01); C09K 2019/2078 (2013.01); C09K 2219/03 (2013.01); C09K 2323/06 (2020.08);
Abstract

Provided are an optical film, a circularly polarizing plate, and an image display apparatus in each of which the occurrence of cracks is suppressed in the obtained film in a case of being punched. The optical film includes a stretched resin film and a liquid crystal layer formed by fixing a liquid crystal compound twist-aligned along a helical axis extending along a direction in thickness, in which a δa value calculated using a three-dimensional solubility parameter of a resin in the stretched resin film is 8.0 MPaor less, the liquid crystal layer contains a cured substance of a polyfunctional compound having two or more polymerizable groups in one molecule, and an absolute value of a difference between the δa value calculated using the three-dimensional solubility parameter of the polyfunctional compound and the δa value calculated using the three-dimensional solubility parameter of the resin is 4.0 MPaor less.

Find Patent Forward Citations

Fukushima, Yuta. (2023). Optical film comprising a stretched resin film and a liquid crystal layer including a polyfunctional compound having two or more polymerizable groups in one molecule, circularly polarizing plate, and image display apparatus (U.S. Patent No. 11592703). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11592703

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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