Oxide TFT Gate Driving Circuit for Ultra-Low-Frequency Display

The patent introduces an intermediary circuit structure between the gate driving unit and the driving transistor gate. This intermediary structure includes additional transistors and capacitors that act as mediators to maintain gate potential stability. The intermediary circuit compensates for gate leakage current and ensures stable voltage levels during ultra-low-frequency driving, resolving the contradiction between achieving low driving frequency and maintaining reliable gate potential.

The patent changes the electrical parameters of the pixel circuit by introducing oxide thin-film transistors with specific leakage characteristics and modifying the timing parameters of gate driving signals. By adjusting the duration and timing of gate voltage application, and by selecting transistors with appropriate leakage parameters, the system achieves stable operation at ultra-low driving frequencies while maintaining gate potential integrity.

The patent implements periodic action by using alternating scan directions (first scan direction for odd rows, second scan direction for even rows) in alternating time periods. This creates a periodic display pattern where adjacent rows are activated in alternating sequences, effectively distributing the display time and reducing the cumulative brightness difference that would otherwise be noticeable during static low-frequency operation.

The patent applies preliminary action by pre-charging capacitors and pre-establishing voltage levels in pixels before the actual display period begins. The gate driving circuit includes preliminary charge accumulation phases that prepare the pixel circuits for the upcoming display sequence, ensuring that brightness levels are already optimized before sequential scanning begins, thus reducing visible brightness differences between rows.

The patent incorporates feedback mechanisms in the gate driving circuit that continuously monitor and adjust gate voltage levels based on actual pixel circuit conditions. The feedback loop detects potential drops or voltage drifts and automatically compensates by adjusting subsequent drive signals, thereby suppressing flickering caused by gate leakage and maintaining stable display output even at ultra-low driving frequencies where power consumption is minimized.

The patent uses composite material structures in the transistor fabrication, specifically combining oxide thin-film transistors with polycrystalline silicon transistors in hybrid pixel circuits. This composite approach leverages the low leakage characteristics of oxide TFTs for power efficiency while using polycrystalline silicon components for stable current drive and reduced flickering, achieving both low power consumption and high display quality.