Bias Maintaining Stage Duration for Display Panel Brightness Adaptation

The patent applies preliminary action by introducing a bias maintaining stage before the light emission stage. During this stage, a bias signal is supplied to the drive transistor to pre-adjust its threshold voltage to a target value. This preliminary adjustment ensures that when the light emission stage begins, the drive transistor is already in the optimal bias state, preventing threshold voltage drift during subsequent operation and maintaining display uniformity throughout the light emission duration.

The patent applies dynamics by making the bias maintaining stage duration adaptive rather than fixed. The duration is dynamically adjusted based on the display brightness level: for higher brightness levels, a longer bias maintaining stage duration is used to ensure adequate threshold voltage stabilization, while for lower brightness levels, a shorter duration suffices. This dynamic adjustment allows the system to adapt to different brightness requirements without requiring complex additional hardware, as the same pixel circuit implements the adaptation through timing control.