Patent ID: 8009157

Claim:
A drive circuit for a light emitting display apparatus including a pixel circuit having a light emitting device for emitting a light having brightness determined based on a supplied current, a drive transistor for supplying the current to the light emitting device, a first to a fifth switches, and a capacitor, and a threshold value correction circuit for correcting a threshold value of the drive transistor of the pixel circuit, wherein the threshold value correction circuit includes a first and a second operational amplifiers, and a first and a second resistor devices so that the first operational amplifier has an output terminal connected to an inversion input terminal of the second operational amplifier through the first resistor device, a non-inversion input terminal connected to a source terminal of the drive transistor through the first switch, and an inversion input terminal connected to the output terminal of the first operational amplifier, wherein the second operational amplifier has an output terminal connected to an inversion input terminal thereof through the second resistor device, wherein the capacitor is connected to the output terminal of the second operational amplifier through the second switch, wherein the third switch is connected between the source terminal of the drive transistor and the ground, and wherein one of terminals of each of the fourth switch and the fifth switch is connected to a gate terminal of the drive transistor, the other terminal of the fourth switch is connected to a connection point between the capacitor and the second switch, and the other terminal of the fifth switch is connected to a signal line from a data driver.