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.:
Date of Patent:
Jul. 08, 2025
Filed:
Mar. 09, 2020
Applicant:
Shanjin Optoelectronics (Suzhou) Co., Ltd., Jiangsu, CN;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/94 (2006.01); G01N 21/55 (2014.01); G02B 1/14 (2015.01); G02B 5/30 (2006.01);
U.S. Cl.
CPC ...
G01N 21/94 (2013.01); G01N 21/55 (2013.01); G02B 1/14 (2015.01); G02B 5/3016 (2013.01); G02B 5/3025 (2013.01); G02B 5/3083 (2013.01); G01N 2021/945 (2013.01);
Abstract
A device for inspecting a liquid crystal stain of a polarization plate, the device comprising a surface light source; a first polarization member; a polarization plate including a liquid crystal film; a second polarization member; and an inspection source, and a method using the device, the device and the method capable of easily inspecting liquid crystal stains generated on a polarization plate with excellent visibility.