HDR Display Brightness Control by Image Region Size

The patent applies local quality by making different parts of the display have different brightness characteristics. Specifically, it identifies a first region for displaying HDR images and a second region for displaying non-HDR images, then applies different brightness adjustment strategies to each region. The processor increases brightness in the first region for HDR content while maintaining appropriate brightness in the second region for non-HDR content, thus resolving the contradiction between HDR image quality and non-HDR image quality.

The patent applies dynamics by making the brightness adjustment dynamic rather than static. Instead of using a fixed threshold that causes abrupt changes, the processor continuously monitors the ratio of the first region to the second region and dynamically adjusts the brightness accordingly. When the ratio exceeds the threshold, brightness is increased; when it falls below, brightness is decreased. This dynamic approach ensures smooth transitions and maintains brightness stability while preserving the simplicity of the control logic.

The patent applies local quality by selectively increasing brightness only in the first region where HDR images are displayed, rather than increasing the brightness of the entire display. The processor identifies the specific region requiring HDR optimization and applies brightness adjustment only there, while maintaining normal brightness in the second region for non-HDR content. This localized approach improves HDR image visibility while minimizing the increase in overall power consumption.