Phase modulator redirecting incident light from darker areas to lighter areas of images
US10477170B2 · kind B2 · utility
3Cited by
12References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2014 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Oct 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Undesirably high energy-consumption in illuminating devices can be caused at least in part by wasted (attenuated) light. Optically efficient illumination systems that may be used to project light, including images, use light redirection. Phase modulating devices may be applied to create desired light fields. Some embodiments provide dual or multiple modulation display or projection systems in which some or all of the modulators not only attenuate amplitude, but also amplify amplitude, or change the phase, frequency and polarization of the light provided by the light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.