Optical panel capable of switching between reflective and transmissive states
US5686979A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1995 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Jun 26, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0456
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device, comprising a switchable optical panel and means for switching the panel between a reflecting state and a transmitting state. The switchable optical panel includes a transparent optically active layer having a first and a second major surface, a first reflective polarizer disposed on the first major surface and a second reflective polarizer disposed on the second major surface. The optically active layer preferably comprises a liquid crystal device and the switching means preferably comprises a system of drying electronics for applying voltage across the liquid crystal device. The invention also includes a switchable window and a transflective optical display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.