Patent ID: 7773051

Claim:
Display apparatus driving circuitry, comprising: an output terminal; a high-voltage power supply terminal for supplying a high voltage; a first low-voltage power supply terminal for supplying a first low voltage for logic; a second low-voltage power supply terminal for supplying a second low voltage; a reference power supply terminal; a first transistor electrically connected between the output terminal and the high-voltage power supply terminal; a second transistor connected between the output terminal and the reference power supply terminal; and a buffer circuit comprising a first p-channel type MOS field effect transistor (PMOS) electrically connected to the first low-voltage power supply terminal, a second p-channel type MOS field effect transistor (PMOS) electrically connected to the second low-voltage power supply terminal, a first NMOS electrically connected between (a) a drain of the first PMOS and a drain of the second PMOS and (b) a gate of the second transistor, and a second NMOS electrically connected between the gate of the second transistor and the reference power supply terminal.