Active layer
US7724431B2 · kind B2 · utility
7Cited by
40References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2006 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Dec 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/31
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus apply an electric field across active layer, wherein active layer is configured to change from a first light attenuating state to a second lesser light attenuating state in response to the applied the electric field and wherein the second lesser light attenuating state permits light to be reflected from a light reflective face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.