OLED Brightness Compensation via Sub-Pixel Degradation Thresholds

The patent applies local quality by differentiating compensation strategies based on the degradation status of individual sub-pixels. Sub-pixels with degradation rates below a first threshold receive brightness enhancement, while those above the threshold undergo brightness reduction. This localized approach optimizes power consumption by avoiding unnecessary compensation of severely degraded sub-pixels, thereby resolving the contradiction between improving brightness uniformity and reducing power consumption.

The patent implements dynamic compensation by continuously monitoring brightness degradation rates and adjusting compensation parameters in real-time. The system dynamically determines compensation amounts based on current degradation states, allowing it to adapt to changing conditions and optimize the balance between uniformity improvement and power consumption over the device lifecycle.

The patent segments the compensation process into distinct stages: degradation detection, threshold-based classification, and differential compensation application. By dividing sub-pixels into different groups based on degradation thresholds and applying tailored compensation strategies to each group, the system manages complexity through structured segmentation while achieving improved brightness uniformity.

The patent utilizes parameter changes by adjusting compensation amounts based on degradation rates and threshold comparisons. The system changes compensation parameters dynamically - applying positive compensation for mild degradation and negative compensation (brightness reduction) for severe degradation - thereby managing complexity through parameter-based control rather than complex structural modifications.

The patent applies partial action by selectively compensating only those sub-pixels whose degradation rates fall below the first threshold. Severely degraded sub-pixels are excluded from brightness enhancement, and the system may even reduce their brightness. This partial compensation approach improves uniformity for compensatable sub-pixels while avoiding the excessive power consumption that would result from attempting to compensate all degraded sub-pixels.

The patent converts the harmful effect of brightness degradation into a beneficial selection criterion. By using degradation rate as a threshold-based filter, the system identifies which sub-pixels should receive compensation and which should not. This transforms the degradation problem into a useful classification mechanism that optimizes power consumption by avoiding compensation of sub-pixels that would require excessive energy input.