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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 9120968 B1

PDFFull Text
Date of Patent:
Sep. 01, 2015

Filed:

Jul. 18, 2013

Liquid crystal display device

Applicant:

Dic Corporation, Tokyo, JP;

Inventors:

Masakazu Kaneoya, Kitaadachi-gun, JP;

Kiyofumi Kateuchi, Kitaadachi-gun, JP;

Seiji Funakura, Kamisu, JP;

Katsunori Shimada, Sakura, JP;

Assignee:

DIC CORPORATION, Tokyo, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Shean C Wu

Int. Cl.
CPC ...
C09K 19/30 (2006.01); C09K 19/42 (2006.01); G02B 5/20 (2006.01); C09K 19/32 (2006.01); C09K 19/58 (2006.01); G02F 1/1335 (2006.01); C09K 19/04 (2006.01); C09K 19/12 (2006.01); C09K 19/34 (2006.01); C09K 19/52 (2006.01);
U.S. Cl.
CPC ...
C09K 19/3066 (2013.01); C09K 19/3068 (2013.01); C09K 19/322 (2013.01); C09K 19/3402 (2013.01); C09K 19/42 (2013.01); C09K 19/582 (2013.01); G02B 5/20 (2013.01); G02F 1/133512 (2013.01); G02F 1/133514 (2013.01); G02F 1/133516 (2013.01); C09K 2019/0407 (2013.01); C09K 2019/0448 (2013.01); C09K 2019/0466 (2013.01); C09K 2019/122 (2013.01); C09K 2019/123 (2013.01); C09K 2019/301 (2013.01); C09K 2019/3009 (2013.01); C09K 2019/3016 (2013.01); C09K 2019/3021 (2013.01); C09K 2019/3027 (2013.01); C09K 2019/3036 (2013.01); C09K 2019/3037 (2013.01); C09K 2019/3425 (2013.01); C09K 2019/523 (2013.01);
Abstract

The present invention provides a liquid crystal display device that allows a reduction in a voltage holding ratio (VHR) of a liquid crystal layer and an increase in an ion density (ID) in the liquid crystal layer to be suppressed and thereby addresses issues of faulty display such as white missing pixels, alignment inconsistencies, and burn-in. The liquid crystal display device according to the present invention, having a feature of suppressing the reduction in a voltage holding ratio (VHR) and the increase in an ion density (ID) in a liquid crystal layer and thereby suppressing occurrence of faulty display such as burn-in, is particularly useful as VA-mode and PSVA-mode liquid crystal display devices for active-matrix driving and may be used for liquid crystal display devices such as a liquid crystal TV, a monitor, a mobile phone, and a smart phone.

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