Provided is a novel display panel that is highly convenient or reliable. The display device has two display modes: a reflective display mode and a light-emitting display mode. In the light-emitting display mode, light display is performed by transmitting light from a light-emitting element overlapping with an opening in a pixel electrode of a reflective display element. A switching element of the reflective display element and a switching element electrically connected to the light-emitting element are formed over one substrate. They are each a transistor whose channel formation region is formed in a silicon-containing film, specifically a polysilicon film.