A method of driving a plurality of scanning signal lines which are arrayed in a display unit by a scanning signal line drive circuit including a shift register, outputted signals from a plurality of bistable circuits being sequentially driven active based on a plurality of clock signals that are externally inputted and cyclically repeat a first level and a second level, the method comprising:
- a first switching element control step of changing a state of a first switching element included in each bistable circuit;
- and
- a second switching element control step of changing a state of a second switching element included in each bistable circuit,
- wherein
- each bistable circuit includes:
- a first-input-node configured to receive an outputted signal from a bistable circuit of a stage before the each bistable circuit as a set signal;
- a first-output-node connected to the scanning signal line and configured to output an outputted signal from the each bistable circuit as a scanning signal for driving the scanning signal line;
- a first output control switching element having a second electrode supplied with one of the plurality of clock signals as a first clock for operation control and a third electrode connected to the first-output-node;
- a first-node turnon switching element configured to change a level of a first-node to an ON level based on the set signal, the first-node being connected to a first electrode of the first output control switching element;
- at least one of a first first-node turnoff switching element and a first first-output-node turnoff switching element, the first first-node turnoff switching element having a second electrode connected to the first-node and being configured to change the level of the first-node to the OFF level, the first first-output-node turnoff switching element having a second electrode connected to the first-output-node, having a third electrode supplied with an OFF level potential, and being configured to change a level of the first-output-node to the OFF level;
- a second-node turnoff switching element having a second electrode connected to a second-node, having a third electrode supplied with an OFF level potential, and configured to turn the second-node to the OFF level during a period in which the first-node is to be maintained at the ON level, the second-node being connected to a first electrode of at least one of the first first-node turnoff switching element and the first first-output-node turnoff switching element;
- the first switching element having a first electrode supplied with one of the plurality of clock signals as a first clock for charge replenishment and a third electrode connected to the second-node;
- a capacitative element having one end connected to a third-node connected to a second electrode of the first switching element;
- and
- the second switching element having a third electrode connected to the third-node, having a first electrode supplied with one of the plurality of clock signals as a second clock for charge replenishment, and configured to charge the capacitative element based on the second clock for charge replenishment,
- the first switching element control step includes:
- a first switching element turnon step of turning the first switching element to an ON state by turning the first clock for charge replenishment to the first level;
- and
- a first switching element turnoff step of turning the first switching element to an OFF state by turning the first clock for charge replenishment to the second level,
- the second switching element control step includes:
- a second switching element turnon step of turning the second switching element to an ON state by turning the second clock for charge replenishment to the first level;
- and
- a second switching element turnoff step of turning the second switching element to an OFF state by turning the second clock for charge replenishment to the second level,
- during a period after the first switching element turnon step is performed until the first switching element turnoff step is performed, the second switching element turnon step and the second switching element turnoff step are not performed, and
- during a period after the second switching element turnon step is performed until the second switching element turnoff step is performed, the first switching element turnon step and the first switching element turnoff step are not performed.