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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 12379616 B1

PDFFull Text
Date of Patent:
Aug. 05, 2025

Filed:

Dec. 27, 2019

Optical film, polarizer protective film, transfer body for polarizer protective film, polarization plate, image display device, and method for manufacturing polarizer protective film

Applicant:

Dai Nippon Printing Co., Ltd., Tokyo, JP;

Inventors:

Seiichi Isojima, Tokyo, JP;

Takahisa Nomura, Tokyo, JP;

Tomoyuki Horio, Tokyo, JP;

Makoto Nanaumi, Tokyo, JP;

Kana Horii, Tokyo, JP;

Yusuke Hiruma, Tokyo, JP;

Takashi Kuroda, Tokyo, JP;

Assignee:

Dai Nippon Printing Co., Ltd., Tokyo, JP;

Attorney:

HSML P.C.

Primary Examiner:

Joseph P Martinez

Int. Cl.
CPC ...
G02F 1/00 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); H10K 85/10 (2023.01); H10K 50/86 (2023.01); H10K 59/80 (2023.01);
U.S. Cl.
CPC ...
G02F 1/0063 (2013.01); G02F 1/133305 (2013.01); G02F 1/133509 (2013.01); G02F 1/133528 (2013.01); H10K 85/10 (2023.02); H10K 50/865 (2023.02); H10K 59/8792 (2023.02);
Abstract

Provided is an optical film which can promise to be thinner and makes it possible to enhance adhesion between a first functional layer and a second functional layer; and a polarizing plate and an image display device both of which include such an optical film. One aspect of the present invention is to provide an optical filmincluding a light-transmitting base material, a first functional layer, and a second functional layerin this order, and further including a mixed layer; wherein at least one of the first functional layerand the second functional layercontains an ultraviolet absorber; wherein the mixed layeris provided between the first functional layerand the second functional layer, is adjacent to the first functional layerand the second functional layer, and contains a component of the first functional layerand a component of the second functional layer; wherein the total film thickness of the first functional layer, the second functional layer, and the mixed layeris 1 μm or more and 10 μm or less; and wherein the ratio of the film thickness of the mixed layerto the total film thickness of the first functional layer, the second functional layer, and the mixed layeris 0.6% or more and 40% or less.

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