OLED Pixel Circuit Reset Sub-Circuit for Afterimage Elimination

The patent applies preliminary action by resetting the driving transistor to an OFF-Bias state before the light emission phase. This reset operation preemptively eliminates the magnetic hysteresis effect by ensuring the transistor starts from a known, consistent state, thereby preventing short-term afterimages and brightness inconsistencies before they can occur during grayscale image switching.

The reset sub-circuit is designed to perform multiple functions: it resets the driving transistor to OFF-Bias state, compensates for threshold voltage drift, and stabilizes the driving current. By making the reset sub-circuit multi-functional, the patent reduces the need for separate dedicated circuits for each function, thereby mitigating the increase in overall circuit complexity while achieving reliable driving current stability.

The patent applies local quality by selectively resetting only the necessary components (driving transistors) to the OFF-Bias state while leaving other parts of the circuit operational. This targeted approach ensures brightness consistency across sub-pixels by uniformizing the critical driving elements without requiring a complete system reset, thereby reducing the overall reset time while maintaining brightness uniformity.