Liquid crystal cells for polarization rotation
US10678057B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2018 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | May 2, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element comprising a stacked liquid crystal (LC) structure for rotating polarization (e.g., handedness) of an incident circularly polarized light over a broad wavelength and incident angle for head-mounted displays (HMD)s display application is proposed. The stacked LC structure has a dual cell structures, which includes at least a first LC cell and a second LC cell, and the stacked LC structure rotates the polarized light for a broad band of light (e.g., visible spectrum) over a given field a view. The performance of designed dual LC cells structures may be optimized for narrow band wavelength and a narrow incident angle for different application cases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.