Flat panel display device for compensating threshold voltage of panel

PURPOSE: A flat plate display panel compensating a threshold voltage of a panel is provided to improve the image quality of a display by compensating a panel threshold voltage through a driving circuit. CONSTITUTION: A driver(410A) has a source line and receives a panel threshold voltage through the source line. The driver(410A) samples the panel threshold voltage to charge the inside thereof. When the driver(410A) receives display data from an outside and generates a driving signal on the basis of the display data and the charged panel threshold voltage to output the driving signal through the source line. A display(420A) has a control signal input line, a gate enable line, a power line, and a source line connected to the driver(410A). The display(420A) receives a first switch control signal from the control signal input line to apply a panel threshold voltage of a panel driving device to the driver(410A). The display(420A) drives a light emitting element(424) mounted thereon using a gate enable signal from the gate enable line, power from the power line, and the driving signal inputted from the driver(410A) to perform a display operation.