SINGLE-ENDED HIGH-VOLTAGE LEVEL SHIFTER FOR GATE DRIVER FOR A THIN FILM TRANSISTOR LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a single-ended high-voltage level shifter used for a gate driver of a thin film transistor liquid crystal display device that can further reduce a chip area of the gate driver so as to considerably reduce the manufacture cost of a gate driver IC. SOLUTION: The single-ended high-voltage level shifter comprises a high- voltage power supply VDD, a low-voltage power supply VSS, a 1st low-voltage NMOS transistor M7, a high-voltage NMOS transistor M2, and a 1st high- voltage MOS transistor M1. An input signal is applied at the gate of a 1st low-voltage NMOS transistor M7. The source of the high-voltage NMOS transistor M7 is connected to the low-voltage power supply VSS. The high-voltage NMOS transistor M2 has a first reference voltage applied at its gate. The source of the high-voltage NMOS transistor M2 is connected to the drain of the 1st low-voltage NMOS transistor M7. The 1st high-voltage PMOS transistor M1 has a second reference voltage applied at its gate. The second reference voltage keeps the high-voltage PMOS transistor M1 in ON-state. The drain of the high-voltage PMOS transistor M1 is connected to the drain of the high- voltage NMOS transistor M2.