Display Panel Driving Transistor Reset for Residual Potential Control

The patent applies preliminary action by performing a three-terminal reset operation on the driving transistor before the data writing phase. This reset operation pre-establishes a consistent initial state for the driving transistor by clearing residual potentials from the previous frame, ensuring that all pixel circuits start from the same baseline condition regardless of their previous display states. This preliminary reset action eliminates the inconsistency caused by varying residual potentials without requiring fundamental changes to the pixel circuit structure.

The patent merges multiple reset operations into a single integrated three-terminal reset process. Instead of performing separate reset operations for different terminals of the driving transistor, the invention combines the reset of the gate terminal, source terminal, and drain terminal into one coordinated operation that occurs simultaneously or in tight sequence. This merging approach achieves comprehensive resetting for consistent light-emitting effects while minimizing the total time required compared to multiple separate reset steps.

The patent applies universality by designing the scan lines to serve multiple functions simultaneously. The first, second, and third scan lines are configured to output valid levels that overlap in time, allowing each scan line to participate in both the reset operation and the data writing operation. This multi-functionality enables the same scan line infrastructure to accomplish both the three-terminal reset and the subsequent data writing without requiring additional dedicated control lines, thereby achieving initial state consistency while avoiding excessive control signal complexity.