In an active matrix display device integrated with a peripheral drive circuit using thin film transistors, when Vgr is a voltage required for one gradation, Ct is capacitance of all pixels, Cgd is capacitance between a gate and a drain, .DELTA.Vg is a difference between ON/OFF gate voltages, and .DELTA.Vs is a feedthrough voltage, the respective parameters satisfy an expression: .vertline.vgr.vertline.>.vertline.(1/Ct)[Cgd.multidot..DELTA.Vg-Ct.multidot..DELTA.Vs].vertline.. According to this, even if dispersion occurs in the characteristics of the thin film transistors arranged for a buffer circuit or an active matrix circuit, it is possible to prevent the dispersion from influencing the gradation display.