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:
Dec. 03, 2002
Filed:
Apr. 10, 2000
E. Gregory Fulkerson, Amelia, OH (US);
Simon Magarill, Cincinnati, OH (US);
John D. Rudolph, Cincinnati, OH (US);
U.S. Precision Lens Incorporated, Cincinnati, OH (US);
Abstract
Optical systems for use with reflective LCDs ( ) are provided. The systems include a polarization beam splitter ( ) which can be composed of polarization beam splitting cubes ( ) having sheet polarizers ( ) and/or half wave plates ( ) at their mating surfaces. By orienting the half wave plates ( ) so that they convert S polarization to P polarization and P polarization to S polarization, the polarization beam splitter ( ) can provide a high contrast ratio at a viewing screen between light from the “on” and “off” pixels of the reflective LCDs ( ).