Liquid crystal display device having an electrostatic discharge protection circuit

A liquid crystal display device, comprising:

• a liquid crystal display panel comprising a plurality of liquid crystal cells, the plurality of liquid crystal cells defined by crossings of a plurality of gate lines and a plurality of data lines, a gate high voltage and a gate low voltage being supplied to the plurality of gate lines;
• a plurality of first electrostatic discharge protection circuits mounted on the liquid crystal display panel, the plurality of first electrostatic discharge protection circuits connected to the plurality of gate lines, respectively;
• a first voltage supply line connected to the plurality of first electrostatic discharge protection circuits, the gate high voltage being supplied to the first voltage supply line;
• and
• a second voltage supply line connected to the plurality of first electrostatic discharge protection circuits, the gate low voltage being supplied to the second voltage supply line,
• wherein the plurality of first electrostatic discharge protection circuits each includes:
• a first switch part including a first transistor connected to a respective gate line and a second transistor connected to the first voltage supply line;
• and
• a second switch part including a third transistor connected to the respective gate line and a fourth transistor connected to the second voltage supply line,
• wherein the plurality of first electrostatic discharge protection circuits each is activated by a first voltage higher than a total value of the gate high voltage and a first threshold voltage of the first switch part or a second voltage lower than a total value of the gate low voltage and a second threshold voltage of the second switch part, and
• wherein the first voltage or the second voltage is supplied to the respective gate line.