Electronically dimmable optical device
US9304333B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 2014 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Jul 29, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/62
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electronically dimmable optical device, including, in sequence, an active absorbing polarizer; a first static reflective polarizer; an active polarization rotator; and a second static reflective polarizer; configured so that the reflectivity and/or transmissivity of the device can be controlled (increased or decreased) by application of a voltage across the active absorbing polarizer and/or the active polarization rotator. One or more polarization levels can be selected by controlling the voltage at the active absorptive polarizer such that setting the active absorptive polarizer to a selected polarization level determines the brightness of an image produced by the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.