Pixel Circuit Driving Method for Display Panel Afterimage Reduction

The patent applies preliminary action by performing a complete reset of the driving transistor during an initialization stage before the data-writing stage. The first initializing transistor resets the gate voltage to a reference level, and the second initializing transistor resets the source/drain voltage, ensuring the transistor is in a known initial state before new data is written. This preliminary reset action eliminates carrier accumulation effects and ensures consistent driving current across different grayscale transitions, thereby eliminating afterimages.

The patent segments the pixel circuit operation into distinct stages: an initialization stage where both transistors are reset to a reference state, and a data-writing stage where new data is written to the driving transistor. This segmentation allows the reset operation to be separated from the data writing operation, ensuring complete reset without interfering with the subsequent data writing process. The segmentation enables the system to spend time on complete reset when needed (during initialization) without delaying the overall display refresh cycle.

The patent segments the reset function into two independent transistor operations: the first initializing transistor handles the gate voltage reset to reference level, and the second initializing transistor handles the source/drain voltage reset. This segmentation allows each transistor to be reset independently and completely, ensuring the driving transistor reaches a true initial state. The segmented approach simplifies the initialization process by dividing it into manageable, parallel operations rather than requiring a complex sequential reset procedure.

The patent introduces intermediary transistors (first and second initializing transistors) that act as mediators between the reference voltage sources and the driving transistor. These intermediary transistors facilitate the reset process by providing controlled paths for voltage equalization. The first initializing transistor serves as an intermediary for gate voltage reset, while the second initializing transistor serves as an intermediary for source/drain voltage reset. This intermediary approach simplifies the overall initialization process by using simple voltage-following transistors rather than complex active reset circuits.