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:
Oct. 30, 2018
Filed:
May. 23, 2016
3m Innovative Properties Company, St. Paul, MN (US);
Kristina M. Magnusson, Djurmo, SE;
Britton G. Billingsley, St. Paul, MN (US);
Kenneth Jarefors, Borlange, SE;
Larissa Zuravskaja, Borlange, SE;
Joy L. Manske, Menomonie, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An automatic-darkening filterthat comprises a first polarizer, a second polarizer, a first liquid-crystal cell, and a sensor. The first polarizerhas a first polarization direction, and the second polarizerhas a second polarization direction. The liquid crystal cellis disposed between the first and second polarizersand contains first and second optically-transparent, flexible, glass layersandwith the liquid crystal layerbeing located between these layers. The sensordetects incident light and causes a signal to be sent, which causes molecular rotation within the liquid crystal layer. The inventive automatic-darkening filter is beneficial in that overall product weight can be reduced and the view field can be increased.