Electronic Device PWM Timing Compensation

The patent applies preliminary action by pre-calculating and storing compensation values in a lookup table that account for propagation delays and signal distortions. Before actual PWM operation, the system determines the appropriate compensation value based on the grayscale value and applies it to adjust the pulse width, thereby compensating for timing errors that would otherwise occur during display operation

The patent implements feedback by using the comparison signal from the voltage comparator to adjust the driving current to the light emitting unit. The system continuously monitors the relationship between voltage data and ramp signal, and uses this feedback information to modulate the pulse width dynamically, ensuring accurate timing compensation while maintaining PWM control functionality

The patent applies local quality by dividing pixel units into different groups (first pixel units and second pixel units) that receive different ramp signals with different slopes. Each group is assigned a specific compensation strategy based on its position and timing characteristics, allowing localized optimization of timing accuracy while maintaining overall system simplicity through the use of only two distinct ramp signal types

The patent implements segmentation by separating the pixel array into multiple groups that receive different compensation treatments. The pixel units are divided into first and second groups with different emission control unit configurations, allowing independent optimization of timing for each segment while using a common lookup table structure to manage compensation values