Display Panel Driving with Overlap Pre-Charge for Uniform Brightness

The patent applies preliminary action by introducing a pre-charge voltage before the target voltage to prepare the sub-pixel for the upcoming voltage transition. During the overlapping time when gate-on signals from adjacent gate lines are simultaneously active, the sub-pixel is first charged with a pre-charge voltage (e.g., 0V or a reference voltage) to establish a stable baseline charge state. This preliminary charging action prevents abnormal brightness transitions that would occur if the sub-pixel were directly charged with the target voltage during the overlap period, thereby resolving the brightness uniformity issue while maintaining standard gate timing.

The patent employs parameter changes by dynamically adjusting the voltage applied to sub-pixels based on the timing of gate-on signals. When a sub-pixel is detected to be in an overlapping time period, the system changes the voltage parameter from the standard target voltage to a specially designed pre-charge voltage. This parameter modification ensures that sub-pixels receiving overlapping gate signals receive appropriate charge levels, preventing brightness anomalies and achieving uniform illumination across the display panel.

The patent applies local quality by implementing different voltage charging strategies for different sub-pixels based on their specific timing conditions. Instead of applying a uniform voltage scheme to all sub-pixels, the system identifies which sub-pixels are currently in overlapping time periods and applies pre-charge voltages only to those specific sub-pixels. Sub-pixels not in overlapping periods continue to receive standard target voltages. This localized differentiation approach improves brightness uniformity while minimizing the increase in driving complexity by only modifying the behavior of affected sub-pixels.

The patent utilizes feedback mechanisms by monitoring the timing of gate-on signals to determine when overlapping periods occur. The driving circuit receives feedback about the current gate signal state and dynamically adjusts the voltage output accordingly. When the feedback indicates that a sub-pixel is in an overlapping time period, the system automatically switches to pre-charge voltage mode; otherwise, it uses standard target voltage mode. This feedback-driven approach automates the complex voltage management, reducing manual intervention while achieving uniform brightness.