Gate drive circuit, gate driving method and display device

A gate driving method comprising:

• in a first time period:
• sending a second switch startup signal to a control terminal of a second switch unit to turn on the second switch unit;
• in a second time period:
• maintaining turning on the second switch unit, and sending a first switch startup signal to a control terminal of the first switch unit to turn on the first switch unit so that an energy storage element is in a charging state;
• in a third time period:
• continuing to maintain turning on the second switch unit, sending a first switch shutdown signal to the control terminal of the first switch unit to turn off the first switch unit so that the energy storage element is in a discharging state, and simultaneously sending a first shutdown control signal to a control terminal of a first shutdown circuit to turn on the first shutdown circuit and output a first shutdown signal to a sub-pixel;
• wherein a second shutdown circuit, the first startup circuit and the second startup circuit being turned off, when the first shutdown circuit is turned on;
• in a fourth time period:
• continuing to maintain turning on the second switch unit, and sending the first switch startup signal to the control terminal of the first switch unit to turn on the first switch unit so that the energy storage element is in the charging state;
• in a fifth time period:
• continuing to maintain turning on the second switch unit, sending a first switch shutdown signal to the control terminal of the first switch unit to turn off the first switch unit so that the energy storage element is in a discharging state, and simultaneously sending a second shutdown control signal to the control terminal of the first shutdown circuit to turn on the second shutdown circuit and output a second shutdown signal to the sub-pixel;
• wherein the sub-pixel is turned off after receiving the first shutdown signal and the second shutdown signal in turn;
• wherein the first shutdown circuit, the first startup circuit and the second startup circuit are turned off, when the second shutdown circuit is turned on;
• in a sixth time period:
• sending a first switch startup signal to the control terminal of the first switch unit to turn on the first switch unit;
• in a seventh time period:
• maintaining turning on the first switch unit, and sending the second switch startup signal to the control terminal of the second switch unit to turn on the second switch unit so that the energy storage element is in the charging state;
• in an eighth time period:
• continuing to maintain turning on the first switch unit, sending a second switch shutdown signal to the control terminal of the second switch unit to turn off the second switch unit so that the energy storage element is in the discharging state, and simultaneously sending a second startup control signal to the control terminal of the second startup circuit to turn on the second startup circuit and output a second startup signal to the sub-pixel;
• wherein the first shutdown circuit, the second shutdown circuit and the first startup circuit being turned off, when the second startup circuit is turned on;
• in a ninth time period:
• continuing to maintain turning on the first switch unit, and sending the second switch startup signal to the control terminal of the second switch unit to turn on the second switch unit so that the energy storage element is in the charging state;
• and
• in a tenth time period:
• continuing to maintain turning on the first switch unit, sending the second switch shutdown signal to the control terminal of the second switch unit to turn off the second switch unit so that the energy storage element is in the discharging state, and simultaneously sending the first startup control signal to the control terminal of the first startup circuit to turn on the first startup circuit and output a first startup signal to the sub-pixel;
• wherein the sub-pixel is turned on after receiving the second startup signal and the first startup signal in turn;
• wherein the second startup circuit, the first shutdown circuit and the second shutdown circuit being turned off, when the first startup circuit being turned off.

A display device comprising:

• a display panel having a display area provided with sub-pixels arranged in an array;
• and
• a gate drive circuit disposed in a non-display area of the display panel, comprising:
• a charging circuit comprising a first switch unit, a second switch unit and an energy storage element, wherein a first terminal of the first switch unit and a first terminal of the energy storage element are connected to a first node, a first terminal of the second switch unit and a second terminal of the energy storage element are connected to a second node, wherein a second terminal of the first switch unit is connected to a voltage supply terminal, a second terminal of the second switch unit is grounded, and the energy storage element switches between a charging state and a discharging state based on a control signal responded by a control terminal of the first switch unit and a control terminal of the second switch unit;
• a first shutdown circuit and a second shutdown circuit, wherein input terminals of the first shutdown circuit and the second shutdown circuit being are connected to the first node, and the output terminals of the first shutdown circuit and the second shutdown circuit being are connected to a sub-pixel;
• wherein the control terminal of the first shutdown circuit responds to a first shutdown control signal when the energy storage element is in a discharging state, so that the output terminal of the first shutdown circuit outputs a first shutdown signal to the sub-pixel;
• and wherein the control terminal of the second shutdown circuit responds to a second shutdown control signal when the energy storage element is in the discharging state, so that the output terminal of the second shutdown circuit outputs a second shutdown signal to the sub-pixel, wherein the first shutdown control signal and the second shutdown control signal are sequentially output, and the first shutdown signal and the second shutdown signal have different magnitudes;
• and
• a first startup circuit and a second startup circuit, wherein input terminals of the first startup circuit and the second startup circuit are connected to the second node, and output terminals of the first startup circuit and the second startup circuit are connected to the sub-pixel;
• wherein a control terminal of the first startup circuit responds to a first startup control signal when the energy storage element is in the discharging state, so that the output terminal of the first startup circuit outputs a first startup signal to the sub-pixel;
• and wherein a control terminal of the second startup circuit responds to a second startup control signal when the energy storage element is in the discharging state, so that the output terminal of the second startup circuit outputs a second startup signal to the sub-pixel, wherein the first startup control signal and the second startup control signal are sequentially output, and the first startup signal and the second startup signal have different magnitudes;
• wherein output terminals of the first shutdown circuit, the second shutdown circuit, the first startup circuit and the second startup circuit are connected to the sub-pixels.