Gate driving circuit

A gate driving circuit, adapted to a liquid crystal display comprising a printed circuit board, wherein the printed circuit board is adapted for providing a gate power supply voltage, a control signal and a predetermined potential;

• the gate driving circuit comprising:
• a gate power supply voltage input line, electrically coupled to receive the gate power supply voltage;
• a control signal input line, electrically coupled to receive the control signal;
• a predetermined potential input line, electrically coupled to receive the predetermined potential;
• a plurality of internal shift data output channel groups, each of the internal shift data output channel groups being for providing sequentially-generated internal shift data signals;
• and
• a plurality of gate signal generating modules, each of the gate signal generating modules comprising:
• a voltage modulation circuit, electrically coupled between the gate power supply voltage input line and the predetermined potential input line and comprising a plurality of input terminals and an output terminal, the input terminals being electrically coupled to the control signal input line and a corresponding one of the internal shift data output channel groups and thereby the voltage modulation circuit is subjected to the control of a result of logic operation of the control signal with the sequentially-generated internal shift data signals from the corresponding one of the internal shift data output channel groups to determine whether directing the gate power supply voltage to the output terminal so as to produce a modulated voltage signal at the output terminal;
• and
• a gate output buffer circuit, electrically coupled to the output terminal of the voltage modulation circuit to receive the modulated voltage signal and for sequentially outputting the modulated voltage signal as a plurality of gate signals to respectively drive a plurality of gate lines;
• wherein the voltage modulation circuit comprises:
• a first-conductivity type transistor, wherein the first source/drain of the first-conductivity type transistor is electrically coupled to the gate power supply voltage input line;
• a second-conductivity type transistor, wherein the first source/drain of the second-conductivity type transistor is electrically coupled to the predetermined potential input line, the second source/drain of the second-conductivity type transistor is electrically coupled to the second source/drain of the first-conductivity type transistor and serves as the output terminal of the voltage modulation circuit, the gate of the second-conductivity type transistor is electrically coupled to the gate of the first-conductivity type transistor;
• and
• a control unit, electrically coupled to the control signal input line and the corresponding one of the internal shift data output channel groups and for controlling on/off states of the first-conductivity type and second-conductivity type transistors.