| abstract |
Thereby suppressing deterioration of the transistor. A plurality of pulse output circuits constituted by the first to eleventh transistors are constituted, and a plurality of clock signals for controlling the respective transistors, a front end signal input from the front end pulse output circuit, a rear end input from the rear end pulse output circuit Signal, and reset signal. A semiconductor layer which is a channel region of the thin film transistor is formed of a microcrystalline semiconductor. In addition, the degree of deterioration of characteristics of the thin film transistor can be reduced. |