Organic light emitting diode display capable of compensating a ripple voltage

An organic light emitting diode (OLED) display comprising:

• pixels connected to scan lines, data lines, and control lines, the control lines being connected to respective gate electrodes of transistors in the pixels;
• a data driver for supplying a data signal to the pixels via the data lines;
• a scan driver for supplying a scan signal to the pixels via the scan lines;
• and
• a control driver for supplying a first control signal to the pixels via the control lines, wherein the control driver feeds back the first control signal supplied to the pixels so as to compensate a ripple voltage included in the first control signal, and generates a compensated first control signal by using the fed-back first control signal,
• wherein the pixels are differently operated by dividing one frame period into a reset period, a compensation period, a data period, and an emitting period, and
• wherein the control driver includes:
• a timing selector configured to determine whether to generate the compensated first control signal or not;
• a sensing unit configured to feedback and sense the first control signal supplied to each of the pixels according to determination of the timing selector;
• an inverter unit configured to generate an inverted first control signal by inversely amplifying the sensed first control signal;
• and
• a first control signal generator configured to generate the compensated first control signal by reflecting the inverted first control signal to the first control signal supplied to the pixels.