Organic light emitting display having a power saving mechanism

An organic light emitting display, comprising:

• a gate driving circuit for providing a scan signal;
• a data driving circuit for providing a data signal;
• a scan line, electrically connected to the gate driving circuit, for delivering the scan signal;
• a data line, electrically connected to the data driving circuit, for delivering the data signal;
• a first power module for generating a first power voltage;
• a second power module for generating a second power voltage, wherein a voltage difference between the first power voltage and the second power voltage is greater than zero;
• a pixel circuit, electrically connected to the scan line, the data line, the first power module and the second power module, for employing the scan signal and the data signal to control a light-emitting driving operation based on the voltage difference;
• a first power line, electrically connected to the pixel circuit and the first power module, for furnishing the first power voltage to the pixel circuit;
• a second power line, electrically connected to the pixel circuit and the second power module, for furnishing the second power voltage to the pixel circuit;
• a ripple detection unit for generating a detection voltage through detecting a ripple voltage of the first power voltage;
• a switch comprising a first end electrically connected to the first power line, a second end electrically connected to the ripple detection unit, and a control end for receiving a switch control signal;
• and
• a processing unit, electrically connected to the ripple detection unit, the switch and the first power module, for employing the detection voltage to generate a power-saving control signal forwarded to the first power module, and for providing the switch control signal;
• wherein the first power module reduces the voltage difference according to the power-saving control signal.