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
US7663705B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2004 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Apr 9, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/066
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Exemplary embodiments of the present invention provide a light propagation characteristic control apparatus which extends the light-intensity dynamic range and the number of levels, and are suited for enhancing image quality and reducing the size and generation time of tables. Exemplary embodiments provide a projection display apparatus that tentatively decides a transmissivity T2 of each pixel of a color-modulation light valve depending upon HDR display data, and decides a transmissivity T1 of each pixel of an intensity-modulation light valve depending upon a tentatively decided transmissivity T2 and the HDR display data, and a control value of each pixel of the intensity-modulation light valve depending upon a decided transmissivity T1. Depending upon a decided transmissivity T1 and the HDR display data, transmissivity T2 is decided of each pixel of the color-modulation light valve. Depending upon a decided transmissivity T2, a control value is decided of each pixel of the color-modulation light valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.