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Optical compensation films based on stretched polymer films

Invented by: Xiaoliang Joe Zheng
Akron, OH

Frank W. Harris
Boca Raton, FL

Ted Calvin Germroth
Kingsport, TN

Jiaokai Alexander Jing
Uniontown, OH

Dong Zhang
Uniontown, OH

Thauming Kuo
Kingsport, TN

Brian Michael King
Jonesborough, TN Applicant: Name City State Country Type Zheng

Originally Assigned to: Akron Polymer Systems
Akron, OH Family ID: 1000001048926
[Now assigned to . . .]

Issued:2015-04-21
Filed:2008-08-22
Application No:12229401
Examined by:Yang; J. L.

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.

[pdf] U.S. Pat. No. 9,011,992

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