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:
Apr. 21, 2015
Filed:
Aug. 22, 2008
Xiaoliang Joe Zheng, Akron, OH (US);
Frank W. Harris, Boca Raton, FL (US);
Ted Calvin Germroth, Kingsport, TN (US);
Jiaokai Alexander Jing, Uniontown, OH (US);
Dong Zhang, Uniontown, OH (US);
Thauming Kuo, Kingsport, TN (US);
Brian Michael King, Jonesborough, TN (US);
Xiaoliang Joe Zheng, Akron, OH (US);
Frank W. Harris, Boca Raton, FL (US);
Ted Calvin Germroth, Kingsport, TN (US);
Jiaokai Alexander Jing, Uniontown, OH (US);
Dong Zhang, Uniontown, OH (US);
Thauming Kuo, Kingsport, TN (US);
Brian Michael King, Jonesborough, TN (US);
Akron Polymer Systems, Akron, OH (US);
Abstract
The present invention provides uniaxially stretched polymer films that have a refractive index profile suitable for use as negative A-plates or biaxial birefringent plates in a liquid crystal display (LCD) device. These wave plates can be used to compensate for the phase retardations existing in various modes of LCDs including TN (twisted nematic), VA (vertically aligned), IPS (in-plane switching), and OCB (optically compensated bend), and therefore improving the viewing quality of the displays.