Display device and method of driving the same

An organic light-emitting diode (OLED) display device comprising:

• a display panel comprising:
• a plurality of pixels each comprising a storage capacitor;
• a switching transistor connected to the storage capacitor and a scan line;
• light emission control transistors connected to source and drain terminals of the switching transistor;
• an initialization transistor connected to the storage capacitor;
• an OLED configured to emit light based on a drive current passing through the light emission control transistors;
• and
• data lines and scan lines connected to the pixels;
• a data driver configured to supply data signals to the pixels through the data lines;
• a scan driver configured to supply scan signals to the pixels through the scan lines;
• a temperature detector configured to detect an ambient temperature;
• a first power supply configured to supply a first drive high voltage, a first drive low voltage, and a first initialization voltage;
• a second power supply configured to supply a second drive high voltage, a second drive low voltage, and a second initialization voltage;
• a timing controller configured to control the data driver, the scan driver, the temperature detector, the light emission controller, and the power selector, and to determine a drive mode of the display panel;
• and
• a power selector configured to selectively connect output power of the first power supply and output power of the second power supply to the pixels according to the drive mode received from the timing controller,
• wherein the scan driver and the data driver are configured to respectivelly supply scan signals and data signals to the pixels at a first frame frequency in a first drive mode, and to respectively supply scan signals and data signals to the pixels at a second frame frequency lower than the first frame frequency in a second drive mode,
• wherein the light emission controller is configured to supply light emission control signals, having a frequency two or more times the second frame frequency during each frame, to the light emission control transistors in the second drive mode, and
• wherein the second power supply is configured to adjust at least one of the second drive low voltage and the second initialization voltage based on the temperature, detected by the temperature detector, in the second drive mode.