Display device and method for driving the same

A method for driving a display device, the method comprising:

• supplying data voltages from a data driver of the display device to data lines of a display panel of the display device, based on digital video data;
• supplying scan signals from a scan driver of the display device to scan lines of the display panel;
• selecting one of a normal mode and a self-refresh mode based on a panel self-refresh enable signal, wherein the data driver and the scan driver are driven by a first frame frequency in the normal mode, and the data driver and the scan driver are driven by a second frame frequency, which is lower than the first frame frequency, in the self-refresh mode;
• supplying driving voltages from a power supply source of the display device to a timing controller, the data driver and the scan driver of the display device;
• generating a power voltage supply control signal based on the panel self-refresh enable signal to have a first logic level voltage in the normal mode and a second logic level voltage different from the first logic level voltage in the self-refresh mode, and supplying the power voltage supply control signal to the power supply source;
• and
• transmitting a direct current power voltage from the power supply source based on the power voltage supply control signal,
• wherein the transmitting the direct current power voltage from the power supply source based on the power voltage supply control signal comprises:
• transmitting the direct current power voltage from the power supply source in response to the power supply control signal having the first logic level voltage;
• and
• blocking the transmitting the direct current power voltage from the power supply source in response to the power supply control signal having the second logic level voltage during a blank period of a frame period.

A display device comprising:

• a display panel comprising data lines, scan lines and a plurality of pixels coupled to the data lines and the scan lines;
• a data driver which supplies data voltages to the data lines based on digital video data;
• a scan driver which supplies scan signals to the scan lines;
• a timing controller which selects one of a normal mode and a self-refresh mode based on a panel self-refresh enable signal, wherein the data driver and the scan driver are driven by a first frame frequency in the normal mode when the panel self-refresh enable signal has a first logic level voltage, and the data driver and the scan driver are driven by a second frame frequency, which is lower than the first frame frequency, in the self-refresh mode when the panel self-refresh enable signal has a second logic level voltage different from the first logic level voltage;
• and
• a power supply source which supplies driving voltages to the data driver, the scan driver and the timing controller and transmits a direct current power voltage to an outside thereof,
• wherein
• the timing controller generates a power voltage supply control signal based on the panel self-refresh enable signal and supplies the power voltage supply control signal to the power supply source, wherein the power voltage supply control signal has a third logic level voltage and a fourth logic level voltage different from the third logic level voltage,
• the power voltage supply control signal has the third logic level voltage during an active period and a blank period of a frame period when the panel self-refresh enable signal has the first logic level voltage,
• the power voltage supply control signal has the third logic level voltage during the active period and has the fourth logic level voltage during the blank period when the panel self-refresh enable signal has the second logic level voltage,
• the power supply source transmits the direct current power voltage in response to the power supply control signal having the first logic level voltage, and
• a transmission of the direct current power voltage from the power supply source is blocked in response to the power supply control signal having the second logic level voltage.