Abstract
The modeled contrast ratio of a twisted nematic liquid crystal display (TN/LCD) was improved by over a factor of 2 to greater than 500:1 at applied voltages of 2 to 4 volts via the addition of a thin negative birefringence optical film with a retardation value up to 50nm and the optical axis parallel to the surface. Combining wide-viewing-angle compensation films with this thin negative birefringence optical film can lead to significantly improve viewing angle as well. This performance improvement is important for high performance microdisplay HMD's, mobile phone, PDA mobile video TV's, and 3D applications.
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