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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 9500790 B1

PDFFull Text
Date of Patent:
Nov. 22, 2016

Filed:

Feb. 19, 2013

Optical film, circularly polarizing plate, and image display device

Applicant:

Konica Minolta, Inc., Chiyoda-ku, Tokyo, JP;

Inventors:

Rie Fujisawa, Kanagawa, JP;

Midori Kogure, Hyogo, JP;

Takatugu Suzuki, Tokyo, JP;

Assignee:

KONICA MINOLTA, INC., Tokyo, JP;

Attorney:

Holtz, Holtz & Volek PC

Primary Examiner:

Ricky D Shafer

Int. Cl.
CPC ...
G02B 5/30 (2006.01); G02B 27/28 (2006.01); G02B 5/22 (2006.01); G02B 5/20 (2006.01); G02B 5/32 (2006.01); C07D 265/22 (2006.01); C07D 207/452 (2006.01); C07D 277/66 (2006.01); C07D 209/86 (2006.01); C07D 295/18 (2006.01); C07D 213/64 (2006.01); C07D 307/60 (2006.01); G02F 1/13363 (2006.01); G02B 27/26 (2006.01); G02B 1/111 (2015.01); H01L 51/52 (2006.01); G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
G02B 5/3083 (2013.01); C07D 207/452 (2013.01); C07D 209/86 (2013.01); C07D 213/64 (2013.01); C07D 265/22 (2013.01); C07D 277/66 (2013.01); C07D 295/18 (2013.01); C07D 307/60 (2013.01); G02B 1/111 (2013.01); G02B 5/208 (2013.01); G02B 5/22 (2013.01); G02B 5/305 (2013.01); G02B 5/3091 (2013.01); G02B 5/32 (2013.01); G02B 27/26 (2013.01); G02B 27/286 (2013.01); G02F 1/13363 (2013.01); H01L 51/5281 (2013.01); G02F 2001/133541 (2013.01);
Abstract

A optical film includes a thermoplastic resin and a compound wherein: (1) the absorption spectrum of said compound in solution has at least two absorption maxima in the 200-350 nm wavelength range; (2) letting λmax1 represent the wavelength of a first absorption maximum (one of the aforementioned absorption maxima) and letting λmax2 represent the wavelength of a second absorption maximum (another of the aforementioned absorption maxima) at a shorter wavelength than the first absorption maximum, (λmax1−λmax2) is at least 20 nm; (3) the aspect ratio of the molecules of the compound is at least 1.70; (4) each molecule of the compound has a non-aromatic hydrocarbon ring, a non-aromatic heterocycle, or an aromatic heterocycle; (5) the in-plane-retardation increase sensitivity of the compound is at least 0.1; 110 nm≦R(550)≦170 nm; 0.72≦R(450)/R(550)≦0.96; and 0.83≦R(550)/R(650)≦0.97.

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