Display device and driving method thereof

A display device, comprising:

• a substrate that includes a first surface and a second surface opposing each other, the substrate including a first display area and a second display area that are adjacent to each other;
• a scan line disposed on the first surface of the substrate, the scan line for transmitting a scan signal;
• a control line for transmitting a control signal that is different from the scan signal;
• an emission control signal line for transmitting an emission control signal that is different from the control signal;
• a data line and a driving voltage line crossing the scan line and the control line;
• a first transistor including a first gate electrode, a first electrode, and a second electrode;
• a second transistor including a second gate electrode connected to the scan line, a first electrode connected to the data line, and a second electrode connected to the first electrode of the first transistor;
• a light-emitting element including a first electrode and a second electrode;
• an optical element disposed below the second surface of the substrate and in the second display area;
• a control transistor including a control gate electrode connected to the control line;
• and
• an emission control transistor including an emission control gate electrode connected to the emission control signal line,
• wherein
• the control transistor, the emission control transistor, and the first transistor are connected to each other in series between the driving voltage line and the first electrode of the light-emitting element.