Abstract: An electrostatic protection structure able to discharge static electricity of either polarity from a functional circuit including signal lines includes a discharge electrode and a plurality of electrostatic protection units electrically coupled to the discharge electrode. Each electrostatic protection unit includes a first TFT and a second TFT. The first TFT includes first gate, source, and drain, the second TFT includes second gate, source, and drain. The first gate and the first drain are electrically connected to one signal line. The first source is electrically connected to the second drain, the first drain is electrically connected to the second source, the second gate is electrically connected to the discharge electrode, and the second gate is electrically connected to the second drain.

Abstract: A thin film transistor substrate allowing an increase in proportionate size of the display area includes gate driving units, signal test pads, a first function line, and a first-stage gate output signal line in a surrounding non-display area, the display area having pixels. The gate driving units include a first-stage gate driving unit with an output terminal electrically connected to one row of pixels. The first function line has a first function but can also multiplex as a connecting line between the first-stage gate output signal line and one test pad. The first-stage gate output signal line is electrically insulated from the first function line during the first function of the first function line but is electrically connected to the first function line when multiplexed.

Abstract: A thin film transistor substrate allowing an increase in proportionate size of the display area includes gate driving units, signal test pads, a first function line, and a first-stage gate output signal line in a surrounding non-display area, the display area having pixels. The gate driving units include a first-stage gate driving unit with an output terminal electrically connected to one row of pixels. The first function line has a first function but can also multiplex as a connecting line between the first-stage gate output signal line and one test pad. The first-stage gate output signal line is electrically insulated from the first function line during the first function of the first function line but is electrically connected to the first function line when multiplexed.

Abstract: An electrostatic protection structure able to discharge static electricity of either polarity from a functional circuit including signal lines includes a discharge electrode and a plurality of electrostatic protection units electrically coupled to the discharge electrode. Each electrostatic protection unit includes a first TFT and a second TFT. The first TFT includes first gate, source, and drain, the second TFT includes second gate, source, and drain. The first gate and the first drain are electrically connected to one signal line. The first source is electrically connected to the second drain, the first drain is electrically connected to the second source, the second gate is electrically connected to the discharge electrode, and the second gate is electrically connected to the second drain.