Simulation display system, spatial image luminance uniformity
US12317008B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2023 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Nov 23, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3194
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Generating luminance uniformity in a rear projection display system is provided. The method comprises calculating luminance generated by a projector on a rear projection screen relative to a design eye position in front of the screen. A baseline luminance is determined for each primary color according to the luminance. Luminance of all locations on the screen is corrected toward the baseline. Correction is allocated between an optical filter and electronic correction. Luminance is measured at calibration points on the screen. The electronic correction for a color image is adjusted according to the allocation and the luminance at the calibration points to produce a corrected color image for projection from the projector. The corrected color image is projected from the projector and through the optical filter. The optical filter is configured to dim specified areas within the corrected color image according to the allocation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.