Thin film transistor, thin film transistor array and repairing method thereof

A thin film transistor array (TFT array), comprising:

• a substrate, having a plurality of pixel regions;
• a plurality of TFTs, disposed in each corresponding pixel region, respectively, the TFTs comprising:
• a gate, disposed on the substrate and having a control part, a connection part and a capacitance compensation part, wherein the connection part joins the control part and the capacitance compensation part;
• a semiconductor layer, disposed over the gate;
• a source, disposed on a part of the semiconductor layer;
• and
• a drain, disposed on a part of the semiconductor layer, wherein a channel is formed between the source and the drain in the semiconductor layer, a first overlapping region between an end of the drain and the control part of the gate and the first overlapping region induces a first parasitic capacitance, a second overlapping region between another end of the drain and the capacitance compensation part of the gate and the second overlapping region induces a second parasitic capacitance,
• wherein the sum of the first parasitic capacitance and the second parasitic capacitance in each pixel region is a constant;
• and
• a plurality of pixel electrodes, disposed in each corresponding pixel region, respectively and electrically connected to the corresponding TFT, respectively.