Low-voltage driven p-type polycrystalline silicon thin-film transistor integrated gate driver circuits for low-cost chip-on-glass panel

P-type low-temperature polycrystalline silicon (LTPS) thin-film transistor (TFT) integrated driver circuits are proposed for low-cost chip-on-glass (COG) panel. In order to reduce the process cost of panel, gate driver employing level-shifter, shift register and DC-DC converter is integrated by p-type polycrystalline silicon (poly-Si) TFTs. The gate drivers are composed of the level-up and level-down voltage shifters and the robust two-clock shift registers. The DC-DC converters are designed using diode-connected type charge pumps and regulators. The proposed p-type circuits were verified successfully by the simulations and the measurements.