Patent · US Active

Polarization controlling elements

US7626661B2 · kind B2 · utility

0Cited by

8References

19Claims

0Family size

Assignees

JDS Uniphase Corporation · US
ROLIC AG · CH

Inventors

Jerry Zieba · Santa Rosa, US
Thomas Mayer · Albuquerque, US
David M. Shemo · Avon, US
Markus Duelli · Seattle, US
Kim Leong Tan · San Jose, US
Karen Denise Hendrix · Santa Rosa, US
Klaus Schmitt · Lörrach, DE

Key dates

Filing date	Dec 7, 2004
Grant date	Dec 1, 2009
Priority date	—
Expiry date	Apr 29, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG02F2201/38
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The invention relates to a polarization compensating element (PCE) for a liquid crystal, e.g. liquid crystal on silicon (LCoS), display system manufactured using a linearly photo-polymerizable polymer (LPP) for orienting a photo-polymerizable liquid crystal polymer (LCP) film. To decrease the reflection, polarization conversion, and interference events in an LPP/LCP assembly the ΔN birefringence value of the LCP material is minimized. Dielectric coatings are added at various locations throughout the assembly for minimizing the amount of reflection, polarization conversion, and interference effects and for suppressing spatial retardance ripples.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.