Drive circuit and method, scanning circuit and method, and display device

A drive circuit, comprising:

• a shift register sub-circuit, including:
• a first control terminal connected to a first control clock signal,
• a second control terminal connected to a second control clock signal,
• a third control terminal connected to a third control clock signal,
• an opening control terminal connected to an opening control signal,
• a first input terminal electrically connected to a first level terminal,
• a second input terminal electrically connected to a second level terminal, and
• the shift register sub-circuit being configured to:
• output a first level from the first level terminal based on an effective level of the second control clock signal,
• output an ineffective level of the first control clock signal based on effective levels of the third control clock signal and a turn-on control signal,
• subsequently output an effective level of the first control clock signal, and
• a phase of the first level and a phase of the second level from the second level terminal being opposite, a phase of the effective level of the first control clock signal being identical to the phase of the second level;
• an output sub-circuit, including:
• a first control terminal electrically connected to an output terminal of the shift register sub-circuit,
• a second control terminal connected to an interval clock signal,
• a first input terminal electrically connected to the first level terminal,
• a second input terminal electrically connected to the second level terminal, and
• the output sub-circuit being configured to:
• output the first level based on the effective level of the first control clock signal output by the shift register sub-circuit, and
• output the second level based on an effective level of the interval clock signal;
• and
• effective levels of the second control clock signal, the third control clock signal, the first control clock signal, and the interval control clock signal being arranged sequentially in time sequence within a driving cycle of the drive circuit.