Display device

A method for driving a semiconductor device,

• wherein the semiconductor device comprises a shift register comprising an output terminal, a first transistor and a second transistor,
• wherein one of a source and a drain of the first transistor is electrically connected to the output terminal,
• wherein one of a source and a drain of the second transistor is electrically connected to the output terminal, and
• wherein the second transistor comprises a channel region comprising an oxide semiconductor,
• the method comprising the steps of:
• outputting a first potential to the output terminal through the first transistor by turning on the first transistor and turning off the second transistor;
• and
• outputting a second potential to the output terminal through the second transistor multiple times by next output of the first potential by turning on and off the second transistor multiple times while the first transistor is off-state,
• wherein the first potential is higher than the second potential.