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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 10040997 B1

PDFFull Text
Date of Patent:
Aug. 07, 2018

Filed:

Sep. 04, 2014

Nematic liquid crystal composition and liquid crystal display element including same

Applicant:

Dic Corporation, Tokyo, JP;

Inventors:

Shinichi Hirata, Kitaadachi-gun, JP;

Go Sudo, Kitaadachi-gun, JP;

Shotaro Kawakami, Kitaadachi-gun, JP;

Assignee:

DIC CORPORATION, Tokyo, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Chanceity N Robinson

Int. Cl.
CPC ...
C09K 19/20 (2006.01); C09K 19/32 (2006.01); C09K 19/30 (2006.01); C09K 19/44 (2006.01); C07C 69/604 (2006.01); C07C 69/753 (2006.01); C07C 69/88 (2006.01); C07D 213/79 (2006.01); C07D 303/40 (2006.01); C07D 305/06 (2006.01); C09K 19/54 (2006.01); C09K 19/04 (2006.01); C09K 19/12 (2006.01);
U.S. Cl.
CPC ...
C09K 19/322 (2013.01); C07C 69/604 (2013.01); C07C 69/753 (2013.01); C07C 69/88 (2013.01); C07D 213/79 (2013.01); C07D 303/40 (2013.01); C07D 305/06 (2013.01); C09K 19/20 (2013.01); C09K 19/3066 (2013.01); C09K 19/44 (2013.01); C09K 19/542 (2013.01); C07C 2601/14 (2017.05); C09K 2019/0407 (2013.01); C09K 2019/0448 (2013.01); C09K 2019/122 (2013.01); C09K 2019/3004 (2013.01); C09K 2019/3009 (2013.01); C09K 2019/548 (2013.01);
Abstract

A nematic liquid crystal composition having negative dielectric anisotropy (Δε), and a liquid crystal device element including the liquid crystal composition. The liquid crystal composition has sufficiently low viscosity (η), sufficiently low rotational viscosity (γ1), a large elastic constant (K), and a negative dielectric anisotropy (Δε) whose absolute value is large, without reducing the refractive index anisotropy (Δn) or the nematic-isotropic liquid phase transition temperature (T). A VA-mode liquid crystal display element including the liquid crystal composition, the liquid crystal display element having no or minimal display defects and having excellent display quality and a fast response. The liquid crystal display element including the liquid crystal composition is useful for an active matrix-addressed liquid crystal display element and used for, for example, a VA- or PSVA-mode liquid crystal display element.

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