Patent ID: 7212037

Claim:
A multi-level shifter circuit of a flat panel source driver, the multi-level shifter circuit comprising: a voltage dropper dropping a source voltage and outputting a dropped source voltage; and a plurality of level shifters to which the dropped source voltage is applied, receiving data composed of a plurality of bits and converting the level of the data, wherein the voltage dropper comprises at least one of; a first PMOS transistor comprising a source connected to the source voltage, a gate connected to the ground voltage, and a drain outputting the dropped source voltage, and a second PMOS transistor comprising a source connected to the source voltage, a gate connected to the around voltage, and a drain outputting the dropped source voltage; a first resistor dropping the source voltage to the dropped source voltage, and a second resistor dropping the source voltage to the dropped source voltage; a PMOS transistor comprising a source connected to the source voltage, a gate connected to the ground voltage, and a drain outputting the dropped source voltage; or a resistor dropping the source voltage to the dropped source voltage.