Gate driver circuit, display device and driving method

A gate driver circuit, comprising:

• a scan signal generation circuit, comprising N1 cascaded shift register units, wherein each of the N1 cascaded shift register units comprises a first output terminal, and the N1 cascaded shift register units are configured to output N1 first pulse scan signals stage by stage respectively through the first output terminals;
• and
• N2 level conversion circuits, configured to output, under a control of the N1 first pulse scan signals, N1 second pulse scan signals which are in one-to-one correspondence with the N1 first pulse scan signals,
• wherein N1 is an integer greater than or equal to 2, and N2 is equal to N1,
• each of the N2 level conversion circuits comprises a first control terminal, a second control terminal, a second output terminal, a first transistor, a second transistor, and a first storage capacitor,
• the first transistor is configured to be switched on to output a first voltage to the second output terminal in a case where a received corresponding first pulse scan signal is at a first level, wherein a gate of the first transistor is configured to be connected with the first control terminal to receive the corresponding first pulse scan signal, a first electrode of the first transistor is configured to be connected with a first voltage terminal to receive the first voltage, and a second electrode of the first transistor is configured to be connected with the second output terminal,
• the second transistor is configured to be switched on to output a second voltage to the second output terminal under a control of a received corresponding second sub-control signal, wherein a gate of the second transistor is configured to be connected with the second control terminal to receive the corresponding first pulse scan signal, a first electrode of the second transistor is configured to be connected with a second voltage terminal to receive the second voltage, and a second electrode of the second transistor is configured to be connected with the second output terminal,
• the first storage capacitor is configured to control a voltage of the second output terminal at the first voltage in a case where the second output terminal outputs the first voltage, and to control the voltage of the second output terminal at the second voltage in a case where the second output terminal outputs the second voltage, wherein a first electrode of the first storage capacitor is configured to be connected with the second output terminal, a second electrode of the first storage capacitor is configured to be connected with a third voltage terminal to receive a third voltage,
• each of the N1 cascaded shift register units further comprises an input terminal, a first clock signal terminal, a second clock signal terminal, a reset terminal, an input circuit, a first node reset circuit, an output circuit, a second node control circuit, a third node control circuit, a first node noise reduction circuit, and an output noise reduction circuit,
• the input circuit is configured to electrically connect a first node with the input terminal under a control of an input signal input at the input terminal to change a level of the first node, and the input circuit comprises a third transistor, wherein a gate of the third transistor is configured to be electrically connected with a first electrode of the third transistor and be connected with the input terminal to receive the input signal, and a second electrode of the third transistor is configured to be connected with the first node,
• the first node reset circuit is configured to electrically connect the first node and the second voltage terminal under a control of a reset signal input at the reset terminal to reset the first node, and the first node reset circuit comprises a fourth transistor, wherein a gate of the fourth transistor is configured to be connected with the reset terminal to receive the reset signal, a first electrode of the fourth transistor is configured to be connected with the first node, and a second electrode of the fourth transistor is configured to be connected with the second voltage terminal to receive the second voltage,
• the output circuit is configured to be switched on under the control of a level of the first node to electrically connect the first clock signal terminal and the first output terminal and output a first clock signal input at the first clock signal terminal to the first output terminal, and the output circuit comprises a fifth transistor and a second storage capacitor, wherein a gate of the fifth transistor is configured to be connected with the first node, a first electrode of the fifth transistor is configured to be connected with the first clock signal terminal to receive the first clock signal, a second electrode of the fifth transistor is configured to be connected with the first output terminal, a first electrode of the second storage capacitor is configured to be connected with the gate of the fifth transistor, and a second electrode of the second storage capacitor is connected with the second electrode of the fifth transistor,
• the second node control circuit is configured to electrically connect a second node and one of the second clock signal terminal and the second voltage terminal under a control of levels of the first node and a third node to change a level of the second node, and the second node control circuit comprises a sixth transistor and a seventh transistor, wherein a gate of the sixth transistor is configured to be connected with the third node, a first electrode of the sixth transistor is configured to be connected with the second clock signal terminal to receive a second clock signal, a second electrode of the sixth transistor is configured to be connected with the second node, a gate of the seventh transistor is configured to be connected with the first node, a first electrode of the seventh transistor is configured to be connected with the second node, and a second electrode of the seventh transistor is configured to be connected with the second voltage terminal to receive the second voltage,
• the third node control circuit is configured to electrically connect the third node and the second voltage terminal under a control of the level of the first node to change a level of the third node, and the third node control circuit comprises an eighth transistor and a ninth transistor, wherein a gate of the eighth transistor is configured to be electrically connected with a first electrode of the eighth transistor, the gate and the first electrode of the eighth transistor are configured to be connected with the second clock signal terminal to receive the second clock signal, a second electrode of the eighth transistor is configured to be connected with the third node, a gate of the ninth transistor is configured to be connected with the first node, a first electrode of the ninth transistor is configured to be connected with the third node, and a second electrode of the ninth transistor is configured to be connected with the second voltage terminal to receive the second voltage,
• the first node noise reduction circuit is configured to electrically connect the first node and the second voltage terminal under a control of the level of the second node to reduce noise at the first node, and the first node noise reduction circuit comprises a tenth transistor, wherein a gate of the tenth transistor is configured to be connected with the second node, a first electrode of the tenth transistor is configured to be connected with the first node, and a second electrode of the tenth transistor is configured to be connected with the second voltage terminal to receive the second voltage,
• the output noise reduction circuit is configured to electrically connect the first output terminal and the second voltage terminal under a control of the level of the second node to reduce noise at the first output terminal, and the output noise reduction circuit comprises an eleventh transistor, wherein a gate of the eleventh transistor is configured to be connected with the second node, a first electrode of the eleventh transistor is configured to be connected with the first output terminal, and a second electrode of the eleventh transistor is configured to be connected with the second voltage terminal to receive the second voltage,
• the N1 cascaded shift register units comprise a shift register unit at a mth stage and a shift register unit at an (m+3)th stage, and the N2 level conversion circuits comprise a level conversion circuit at the mth stage, the N1 first pulse scan signals comprise an mth first pulse scan signal and an (m+3)th first pulse scan signal,
• the first control terminal of the level conversion circuit at the mth stage is electrically connected with the first output terminal of the shift register unit at the mth stage to receive the mth first pulse scan signal as a first sub-control signal, and the second control terminal of the level conversion circuit at the mth stage is electrically connected with the first output terminal of the shift register unit at the (m+3)th stage to receive the (m+3)th first pulse scan signal as a second sub-control signal, and m is an integer greater than or equal to 1, and m+3 is less than or equal to N1,
• a pulse of the mth first pulse scan signal and a pulse of the (m+3)th first pulse scan signal do not temporally overlap,
• the reset terminal of the shift register unit at a kth stage is connected with the first output terminal of the shift register unit at a (k+3)th stage, wherein k is an integer, 1≤k≤(N1−4),
• the input terminal of the shift register unit at an nth stage is connected with the first output terminal of the shift register unit at an (n−3)th stage, wherein n is an integer, 4≤n≤N1,
• the input terminals of the shift register units at a first stage, a second stage, and a third stage are configured to receive a trigger signal, and the reset terminals of the shift register units at a last three stages are configured to receive a common reset signal.