CIRCUIT FOR REGULATING POWER SOURCE VOLTAGE AND APPARATUS FOR DRIVING DISPLAY PANEL HAVING THE SAME

摘要

A circuit for regulating a source voltage and a display panel driving apparatus having the same are provided to enhance display quality of the display panel by supplying a stable source voltage to a pixel circuit. A circuit for regulating a source voltage includes a voltage level controller(434), an amplifier(432), and a source voltage transistor(Tp). The voltage level controller selects a voltage which corresponds to a voltage level control signal, among plural voltages divided from a reference voltage, and outputs the selected voltage as a level setting voltage(Vp). The amplifier amplifies a difference between the level setting voltage and a stabilized source voltage(V_REG), and outputs the amplified difference voltage(Vo). The source voltage transistor includes a first terminal for receiving a source voltage(VDD), a control terminal for receiving the amplified difference voltage, and a second terminal for outputting the stabilized source voltage to respective pixel circuits.