| abstract |
(57) [Problem] To realize a shift register which eliminates the influence of the operation speed of polysilicon and enables high-speed, high-definition display. SOLUTION: This shift register has a switching element in which an active layer is formed of polysilicon, and charges charged / discharged from a power supply line are transferred to a next stage (M1 and M3) through only one switching element (M1, M3). M2, M4). |