Balanced light valve
US7656571B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 2008 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Jul 31, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/315
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Radiation from an illumination source (102) is directed to a total internal reflector (TIR) modulator (10). The modulator includes a an electro-optic member (213) with a plurality of individually addressable pixel regions (210) comprised of a plurality of electrodes arranged in a first and second set. At least one electrode of the first set is adjacent to at least one electrode of the second set and at least one of the pixel regions is controlled to form at least one image pixel on a surface. A first electric potential is imposed on the first set of electrodes selected from a first predetermined group of electric potential values. A second electric potential is imposed on the second set of electrodes selected from a second predetermined group of electric potential values. The first and second predetermined groups of electric potential values together comprise at least three different electric potential values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.