Video display apparatus and video display method
US8462172B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2010 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Jun 24, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video display apparatus includes: an area-specific lighting value calculator configured to calculate a lighting value of each of divided light source regions of a backlight and output the lighting value as numerical data; a signal output module configured to output a video signal correlated with the lighting value to a display module; a backlight controller configured to control the backlight based on the lighting value; a correction gain setting module configured to obtain a signal correction coefficient; a frequency separator configured to separate the input video signal; a signal corrector configured to correct the lighting value with respect to a low frequency component or DC component separated from the input video signal to suppress amplification of noise contained in a dark portion and generate an output video signal; and a display controller configured to control the display module to display the output video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.