Rapid discharging circuit, display device, rapid discharging method and display control method

A display device, comprising a plurality of gate lines, a plurality of data lines, a data switch and a driving Integrated Circuit (IC), wherein

• the driving IC comprises a data voltage supplying unit;
• a first end of the data switch is connected to the data voltage supplying unit, and a second end of the data switch is connected to the data lines;
• the display device further comprises a rapid discharging circuit comprising a discharging unit, wherein
• a control end of the discharging unit is connected to a driving integrated circuit (IC), a first end of the discharging unit is connected to a gate line of the display device, and a second end of the discharging unit is connected to a display level end of the display device, the display level end is connected to the driving IC;
• and the discharging unit is configured to control the display level end to write a first level into the gate line when the display device is powered off abnormally;
• the driving IC further comprises a determination unit, a potential control unit and a data line control unit;
• a control end of the data switch is connected to the data line control unit;
• the determination unit is configured to determine whether or not the display device is powered off abnormally, and when the display device is powered off abnormally, output an abnormal power-off indication signal;
• the potential control unit is connected to the determination unit, a control end of a discharging unit and a display level end, and configured to, upon the receipt of the abnormal power-off indication signal, output a discharging control signal to the control end of the discharging unit, and control a potential at the display level end to be a first level;
• the data line control unit is connected to the determination unit, the control end of the data switch and the data voltage supplying unit, and configured to, upon the receipt of the abnormal power-off indication signal from the determination unit, control the data switch so that the data voltage supplying unit writes a predetermined discharging level into the data line;
• and
• the discharging unit is configured to, upon the receipt of the discharging control signal at the control end, control the display level end to write the first level into the gate line,
• wherein the discharging unit comprises a discharging transistor, a gate electrode of the discharging transistor is connected to the potential control unit, a first electrode of the discharging transistor is connected to the gate line, and a second electrode of the discharging transistor is connected to the display level end;
• and
• the potential control unit is further configured to, when the abnormal power-off indication signal fails to be received, turn on the discharging transistor at a touch time period, and control the display level end to write a second level into the gate line.