P‐22: Scan Driver Circuit with Multiple Outputs employing Low‐temperature Polysilicon and Oxide TFTs for Mobile Displays

In this paper, we propose a scan driver circuit with two outputs employing low‐temperature polycrystalline silicon and oxide (LTPO) thin‐film transistors (TFTs). The proposed scan driver circuit can generate two types of scan signals that can drive p‐ type and n‐type switching TFTs. In addition, by using the Q[n] node bootstrapping method, the output is stably generated even in the depletion mode of the amorphous indium‐gallium‐zinc‐ oxide (a‐IGZO) TFTs. As it is a scan driver circuit that can be applied to LTPO TFT‐based pixel circuits, variable refresh rate operation is possible. Therefore, the proposed scan driver circuit can be applied to displays requiring high resolution, narrow bezel, and low power consumption.