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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 10961328 B1

PDFFull Text
Date of Patent:
Mar. 30, 2021

Filed:

Mar. 29, 2018

Optical film, brightness enhancement film, backlight unit with brightness enhancement film, and liquid crystal display device

Applicant:

Fujifilm Corporation, Tokyo, JP;

Inventors:

Wataru Hoshino, Minami-ashigara, JP;

Yukito Saitoh, Minami-ashigara, JP;

Kunihiro Atsumi, Minami-ashigara, JP;

Assignee:

FUJIFILM Corporation, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Ruiyun Zhang

Int. Cl.
CPC ...
C08F 2/44 (2006.01); C09K 19/54 (2006.01); G02F 1/13363 (2006.01); C08L 101/00 (2006.01); C09D 4/00 (2006.01); C09K 19/30 (2006.01); G02B 5/30 (2006.01); C08F 20/30 (2006.01); C08F 20/36 (2006.01); C08L 101/12 (2006.01); C09K 19/12 (2006.01); C08F 220/54 (2006.01); C09K 19/34 (2006.01); C08F 228/02 (2006.01); C09K 19/04 (2006.01); C08F 220/36 (2006.01); C08F 220/28 (2006.01);
U.S. Cl.
CPC ...
C08F 2/44 (2013.01); C08F 20/30 (2013.01); C08F 20/36 (2013.01); C08L 101/00 (2013.01); C08L 101/12 (2013.01); C09D 4/00 (2013.01); C09K 19/3098 (2013.01); C09K 19/54 (2013.01); G02B 5/3016 (2013.01); G02B 5/3025 (2013.01); G02F 1/13363 (2013.01); G02F 1/133634 (2013.01); C08F 220/283 (2020.02); C08F 220/36 (2013.01); C08F 220/54 (2013.01); C08F 228/02 (2013.01); C09K 2019/0448 (2013.01); C09K 2019/122 (2013.01); C09K 2019/123 (2013.01); C09K 2019/301 (2013.01); C09K 2019/3004 (2013.01); C09K 2019/3009 (2013.01); C09K 2019/3015 (2013.01); C09K 2019/3016 (2013.01); C09K 2019/3021 (2013.01); C09K 2019/3025 (2013.01); C09K 2019/3027 (2013.01); C09K 2019/3071 (2013.01); C09K 2019/3422 (2013.01); C09K 2019/3425 (2013.01); C09K 2323/00 (2020.08); C09K 2323/03 (2020.08); C09K 2323/06 (2020.08); G02F 2001/133633 (2013.01);
Abstract

An optical film including: a cholesteric layer of a disk-like liquid crystal composition including a disk-like liquid crystal compound, in which the cholesteric layer exhibits a cholesteric liquid crystalline phase, and in which fluctuation of a helical pitch in a film thickness direction of the cholesteric layer is 2% or greater, and having a cholesteric liquid crystalline phase of a disk-like liquid crystal compound and a wide reflection bandwidth; a brightness enhancement film; a backlight unit with a brightness enhancement film; and a liquid crystal display device.

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