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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 11390007 B1

PDFFull Text
Date of Patent:
Jul. 19, 2022

Filed:

Jul. 14, 2020

Front plate for onboard lcd device

Applicants:

Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;

Mgc Filsheet Co., Ltd., Saitama, JP;

Inventors:

Hirokazu Takenaka, Osaka, JP;

Yasuo Oose, Tokyo, JP;

Takuya Goto, Tokyo, JP;

Assignees:

MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo, JP;

MGC FILSHEET CO., LTD., Saitama, JP;

Attorney:

Greenblum & Bernstein, P.L.C.

Primary Examiner:

Yung-Sheng M Tsui

Int. Cl.
CPC ...
B29C 48/18 (2019.01); B32B 27/30 (2006.01); B32B 27/36 (2006.01); C08L 25/08 (2006.01); C08L 69/00 (2006.01); G02B 1/14 (2015.01); B32B 27/08 (2006.01); G02F 1/1335 (2006.01); C08L 33/06 (2006.01); G02F 1/1333 (2006.01);
U.S. Cl.
CPC ...
B29C 48/18 (2019.02); B32B 27/08 (2013.01); B32B 27/30 (2013.01); B32B 27/302 (2013.01); B32B 27/308 (2013.01); B32B 27/36 (2013.01); B32B 27/365 (2013.01); C08L 25/08 (2013.01); C08L 69/00 (2013.01); G02B 1/14 (2015.01); G02F 1/1335 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2307/732 (2013.01); B32B 2457/202 (2013.01); C08L 33/06 (2013.01); G02F 1/133331 (2021.01); G02F 2201/38 (2013.01); G02F 2201/54 (2013.01);
Abstract

A front panel for on-board liquid crystal displays has a high hardness resin composition (B) on at least one side of a layer containing a resin (A) having a polycarbonate resin (a1). The front panel satisfies the following conditions (i) to (iv): (i) the thickness of the layer containing a high hardness resin composition (B) is 10 to 250 μm, and the total thickness of the layer containing a resin (A) comprising a polycarbonate resin (a1) and the layer containing a high hardness resin composition (B) is 100 to 3,000 μm; (ii) the high hardness resin composition (B) consists of any one of specific resin compositions (B1) to (B3); (iii) the retardation of the front panel is 3,000 nm or more; and (iv) the standard deviation of the second derivative of the irregular shape of the hard coat layer having irregularities is 0.1 or more.

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