Light propagation characteristic control apparatus, optical display apparatus, light propagation characteristic control program, optical display apparatus control program, light propagation characteristic control method and optical display apparatus control method
US7431461B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2004 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Jul 14, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3126
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Exemplary embodiments of the invention provide a light propagation characteristic control apparatus which realizes to extend the light-intensity dynamic range and the number of levels, and is suited for enhancing image quality and reducing the size and generation time of tables. A projection display apparatus tentatively decides a transmissivity T2 of each pixel of a color-modulation light valve, decides a transmissivity T1 of each pixel of an light intensity-modulation light valve depending upon a tentatively decided transmissivity T2 and HDR display data and decides a control value of each pixel of an light intensity-modulation light valve depending upon a decided transmissivity T1. Then, depending upon a decided transmissivity T1 and HDR display data, a transmissivity T2 is decided of each pixel of the color modulation light valve. Depending upon a decided transmissivity T2, decided is a control value of each pixel of the color modulation light valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.