| 摘要 |
A thin film transistor circuit has a main thin film transistor (10), a control input (12) for controlling the operation of the main thin film transistor and a threshold adjustment capacitor (14) connected between the control input and the gate of the main thin film transistor. A charging circuit (16, 18) is used for charging the threshold adjustment capacitor to a desired threshold adjustment voltage. The circuit is used to affect a voltage shift to the voltage applied to the control input. This effectively implements a threshold voltage change by altering the relative voltages on the main transistor gate and the control input.
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