Source driver of display device

摘要

A source driver may include: a transmission line configured to transmit an output signal of a sample and hold circuit which stores pixel information of an organic light emitting diode (OLED) cell; an amplifier is formed a first offset voltage at an input terminal by a parasitic capacitor of the transmission line; and an offset voltage storage unit configured to store the first offset voltage outputted from the amplifier as a second offset voltage while the transmission of the output signal of the sample and hold circuit through the transmission line is turned off, and offset the first offset voltage by providing the second offset voltage to the input terminal of the amplifier when the output signal of the sample and hold circuit is transmitted through the transmission line.

主权项

1. A source driver comprising:
a transmission line configured to transmit an output signal of a sample and hold circuit which stores pixel information of an organic light emitting diode (OLED) cell; an amplifier having an input terminal at which a first offset voltage is formed by a parasitic capacitor of the transmission line; an offset voltage storage unit storing the first offset voltage outputted from the amplifier as a second offset voltage while the transmission of the output signal of the sample and hold circuit through the transmission line is turned off, and offsetting the first offset voltage by providing the second offset voltage to the input terminal of the amplifier when the output signal of the sample and hold circuit is transmitted through the transmission line; and a switch group having a plurality of switches which isolates the sample and hold circuit and the amplifier from each other, couples the input terminal and an output terminal of the amplifier, and operates the amplifier as a unity buffer, while the transmission of the output signal of the sample and hold circuit is turned off.