Video signal processing circuit, video display apparatus, and video display method
US7265795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | May 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/69
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the invention provide a video display technique with which a stable video with a high contrast can be obtained according to brightness of a screen. In one embodiment, a video signal processing system for a video display apparatus which performs display on the basis of a video signal comprises a gain control module configured to provide a feedback signal based upon maximum luminance level information and average luminance level information of a luminance signal corresponding to the video signal, the feedback signal being used to control a gain of the luminance signal; and a correction module configured to apply a gamma correction based upon the average luminance level information to the video signal after the gain of the luminance signal has been controlled by the gain control module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.