Patent · US Active

Broadband and wide viewing angle waveplate having pi-cell

US10948779B2 · kind B2 · utility

0Cited by
0References
17Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 23, 2020
Grant dateMar 16, 2021
Priority date—
Expiry dateMar 23, 2040

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02F2413/14
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

An optical waveplate is provided. The optical waveplate includes a positive-C film including a first liquid crystal (“LC”) layer. Tilt angles of LC molecules vary along a thickness direction of the first LC layer. The optical wave also includes an LC cell disposed at a first side of the positive-C film and including a second LC layer aligned in an optically compensated bend (“OCB”) mode. The optical waveplate also includes a positive-A film disposed at a second side of the positive-C film. The optical waveplate further includes a negative biaxial retardation film disposed between the positive-A film and the positive-C film. The LC cell is switchable between at least two predetermined states.

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