Semiconductor device, active matrix board, and display device

A method of driving a semiconductor device that includes:

• a plurality of switching elements that are connected in series;
• a first capacitance having one electrode connected to an end of the plurality of switching elements and another electrode being connected to a first capacitance wiring line;
• a second capacitance having one electrode connected to a node that connects two adjacent switching elements among the plurality of switching elements, and another electrode being connected to a second capacitance wiring line;
• and
• a light-shielding film that blocks light from being incident on at least one of the plurality of switching elements,
• the method comprising:
• turning OFF each switching element between the first capacitance and the second capacitance;
• and
• when each switching element between the first capacitance and the second capacitance is OFF, changing a voltage of the second capacitance wiring line such that a difference in potential between said one electrode of the first capacitance and said one electrode of the second capacitance is reduced.