Two-stage light modulation for high dynamic range
US9491422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2015 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Nov 23, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3155
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging apparatus for two-stage light modulation in high-definition digital projection or cinema can include two light modulators. Each light modulator can include a multi-chip imaging system coupled to a total internal reflection prism (TIR) system, which has a light input face and an on-state face. Relay optics can be positioned between the two light modulators. The relay optics can be configured to defocus light received from the pre-modulator and to provide defocused light to the prime modulator using a substantially Gaussian pixel shaping function. The prime modulator can be oriented to receive defocused light from the relay optics at the light input face of its TIR prism system. The pre-modulator can be oriented backwards, so as to receive source light at the on-state face of its TIR prism system and to output pre-modulated light to the relay optics via the light input face of the TIR prism system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.