Reflective LC devices including thin film metal grating
US10473839B2 · kind B2 · utility
1Cited by
4References
20Claims
0Family size
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Key dates
| Filing date | Feb 24, 2017 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Feb 24, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/50
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A sub-wavelength thin-film metal grating is placed inside a liquid crystal variable optical retarder at a selected distance from a reflective electrode to form a reflective half wave plate, thereby reducing polarization dependence of the optical retardation generated by the variable optical retarder. The approach enables to form within the device the reflective half wave plate that is suitably thin without modifying the reflective electrode of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.