Subpixel Current Thresholding for AMOLED Power Management

The patent applies local quality by differentiating power consumption control at the subpixel level rather than uniformly across all pixels. By calculating total current based on subpixel grayscale data and applying selective gain factors to different subpixels, the system optimizes power consumption locally while maintaining necessary brightness in specific regions, thus resolving the contradiction between overall brightness and power consumption.

The patent changes parameters by dynamically adjusting subpixel grayscale values through gain factors based on total current calculations. By monitoring the total current consumed by subpixels and applying multiplicative gain factors to adjust grayscale data, the system transforms the static brightness parameter into a dynamically controllable variable that adapts to power consumption constraints, thereby reducing power consumption while maintaining display performance.

The patent implements feedback by calculating the total current of subpixels based on grayscale data and using this calculated value to determine appropriate gain factors. This closed-loop feedback mechanism ensures that brightness adjustments are made based on actual power consumption levels, allowing the system to reduce power consumption while maintaining display brightness within acceptable ranges through iterative optimization.

The patent applies dynamics by making the gain factor adjustable and stage-dependent rather than fixed. The gain factor evolves through multiple stages with different multiplication factors, allowing the system to dynamically adapt brightness control strategies based on total current thresholds. This dynamic approach enables flexible trade-offs between power consumption and brightness rather than relying on static parameter settings.