Broadband and wide viewing angle waveplate having pi-cell
AssigneeFacebook Technologies, LLC
InventorsAfsoon Jamali, Yingfei Jiang
Life of this patent
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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.
Claims17
An optical waveplate, comprising:
- a positive-C film including a first liquid crystal (“LC”) layer, tilt angles of LC molecules in the first LC layer varying along a thickness direction of the first LC layer;
- 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;
- a positive-A film disposed at a second side of the positive-C film;
- and
- a negative biaxial retardation film disposed between the positive-A film and the positive-C film,
- wherein the LC cell is switchable between at least two predetermined states.
Dependencies are inferred from the claim text.