Sampling Circuit Reset for Stable Thin-Film Transistor Sensing

The patent applies preliminary action by performing a reset operation before the sensing operation. The reset transistor resets the sensing node to a known reference voltage level, and the holding capacitor stores this reference voltage. This preliminary resetting eliminates the influence of threshold voltage drifting and noise from previous operations, ensuring that the subsequent sensing measurement starts from a clean, known state, thereby improving measurement precision while maintaining the amplification function.

The patent applies self-service by making each sensing circuit unit autonomous through the inclusion of dedicated reset and hold components in each pixel. Each sensing circuit independently performs its own reset operation and maintains its own reference voltage level, compensating for process variations and threshold voltage differences. This self-service mechanism allows identical circuit structures to be manufactured uniformly while each unit automatically compensates for its own variations, ensuring consistent output voltages under the same signal intensity.