Power management driver and display device having the same

A display device, comprising:

• pixels coupled to scan lines, control lines, data lines, and sensing lines;
• a scan driver configured to supply a scan signal to the scan lines and supply a control signal to the control lines;
• a data driver configured to supply one of an image data signal and a sensing data signal to the data lines;
• a sensing circuit configured to sense characteristics of driving transistors included in the pixels based on a sensing current supplied through the sensing lines during a sensing period;
• and
• a power management driver configured to provide first driving power and second driving power to the pixels,
• wherein the power management driver comprises:
• a first power supply configured to supply a first voltage of the first driving power to the pixels through a first power line during a sensing period, and supply a second voltage of the first driving power to the pixels through the first power line during a display period;
• a second power supply configured to supply a voltage of second driving power to the pixels through a second power line during the sensing period and the display period;
• a controller configured to control timing at which the first voltage of the first driving power is output and timing at which the second voltage of the first driving power is output during a transition period between the display period and the sensing period in response to a sensing control signal;
• and
• a fault detector configured to detect a reduced impedance fault in the first power line based on a current flowing through an output terminal during the sensing period.

A display device, comprising:

• a pixel array comprising a plurality of pixels arranged in at least first and second dimensions;
• scan lines and control lines each connected to a plurality of pixels in at least the first dimension;
• data lines each connected to a plurality of pixels in at least the second dimension;
• a scan driver configured to concurrently supply a scan signal to the scan lines and a control signal to the control lines;
• a data driver configured to alternately supply to the data lines with one of an image data signal during a display period or a sensing data signal during a sensing period;
• and
• a sensing circuit configured to sense impedance characteristics of the plurality of pixels based on a sensing current of the data lines during the sensing period.