Display Technology Letters A Compact Bi-Direction Scannable a-Si:H TFT Gate Driver

An integrated a-Si:H thin-film transistors (TFTs) gate driver on array with both forward and backward scanning func- tion is proposed. The single stage of the gate driver only consists of seven TFTs. The bi-direction scannable function is just realized by controlling the turning-on sequence of two input TFTs. Both scan- ning modes use the same driving TFT for pulling-up and pulling- down the output voltage and the same circuit unit for holding the low level. The proposed gate driver is fabricated in the 4.5 G TFT production line, and the measurements with the fabricated drivers verify the feasibility of the proposed driver. Index Terms—A-Si:H, bi-directional scan, gate driver, thin-film transistors (TFTs).