Patent ID: 8717258

Claim:
A light emitting display including a plurality of data lines for transmitting data voltages corresponding to video signals, a plurality of scan lines for transmitting select signals, and a plurality of pixel circuits, each said pixel circuit coupled to a corresponding said data line to receive a corresponding said data voltage and a corresponding said scan line to receive a corresponding said select signal, each said pixel circuit comprising: a transistor including a first electrode, a second electrode for receiving a first power supply voltage, and a third electrode for outputting a current corresponding to a voltage between the first electrode and the second electrode; a light emitting element coupled to the third electrode for emitting light corresponding to the current outputted by the third electrode; a first switch for transmitting the corresponding said data voltage in response to the corresponding said select signal from the corresponding said scan line; and a voltage compensator for receiving the corresponding said data voltage transmitted by the first switch and a second power supply voltage of a power supply, and for applying a compensated data voltage based on the corresponding said data voltage, the first power supply voltage and the second power supply voltage to the first electrode of the transistor, wherein the voltage compensator comprises: a capacitor having a first electrode coupled to the first electrode of the transistor, and a second electrode coupled to the first switch; a second switch for diode-connecting the transistor in response to a first control signal; and a third switch having a first electrode directly connected to the second electrode of the capacitor and a second electrode directly connected to the power supply, for substantially electrically isolating the second electrode of the capacitor from the second power supply voltage in response to a second control signal.