Efficient, dynamic, high contrast lensing with applications to imaging, illumination and projection
US10834369B2 · kind B2 · utility
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1References
13Claims
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Key dates
| Filing date | Jul 19, 2019 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Jul 19, 2039 |
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.