Efficient, dynamic, high contrast lensing with applications to imaging, illumination and projection
US11558590B2 · kind B2 · utility
1Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2020 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | Sep 30, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3188
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A new projector design combines one spatial light modulator that affects only the phase of the illumination, and one spatial light modulator that only affects its amplitude (intensity). The phase-only modulator curves the wavefront of light and acts as a pre-modulator for a conventional amplitude modulator. This approach works with both white light and laser illumination, generating a coarse image representation efficiently, thus enabling, within a single image frame, significantly elevated highlights as well as darker black levels while reducing the overall light source power requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.