Display device, display module, and electronic device

A display device comprising:

• first to fifth transistors, a capacitor, a light-emitting/receiving element, and first to fourth wirings,
• wherein one of a source and a drain of the second transistor is electrically connected to the first wiring,
• wherein the other of the source and the drain of the second transistor is electrically connected to a gate of the first transistor,
• wherein one of a source and a drain of the third transistor is electrically connected to the second wiring,
• wherein the other of the source and the drain of the third transistor is electrically connected to one of a source and a drain of the first transistor,
• wherein one of a source and a drain of the fourth transistor is electrically connected to the other of the source and the drain of the first transistor,
• wherein the other of the source and the drain of the fourth transistor is electrically connected to an anode of the light-emitting/receiving element,
• wherein a cathode of the light-emitting/receiving element is electrically connected to the third wiring,
• wherein one of a source and a drain of the fifth transistor is electrically connected to the other of the source and the drain of the first transistor,
• wherein the other of the source and the drain of the fifth transistor is electrically connected to the fourth wiring,
• wherein one electrode of the capacitor is electrically connected to the gate of the first transistor,
• wherein the other electrode of the capacitor is electrically connected to the other of the source and the drain of the first transistor,
• wherein a first potential is supplied to the second wiring,
• wherein a second potential lower than the first potential is supplied to the third wiring, and
• wherein the light-emitting/receiving element is configured to emit light of a first color and to convert light of a second color into an electric signal.