Polysilicon Display Panel Residual Charge Discharge Circuit

The patent applies preliminary action by detecting the disconnection state before complete power shutdown and activating the discharge circuit in advance. The controller detects when the test apparatus disconnects via the connection device, then proactively triggers the discharge circuit to release residual charges from pixel electrodes before the panel is fully powered down, preventing ghost images and grayscale flicker while maintaining energy savings.

The patent implements periodic action by activating the discharge circuit only at specific moments when disconnection is detected, rather than continuously. The controller periodically monitors the connection state through the connection device and triggers discharge only when needed (upon disconnection detection), ensuring display quality improvement while minimizing unnecessary power consumption during normal operation.

The patent applies universality by designing the connection device to serve multiple functions: it acts as both a connection indicator for detecting disconnection state and as part of the discharge circuit pathway. The same connection device structure that detects the disconnection state also provides the conductive path for discharging residual charges, reducing the need for separate dedicated discharge components and minimizing overall device complexity.