Programming circuit, light emitting device using the same, and display device

Even if characteristics of transistors differ every circuit, in order to suppress an influence by the different characteristics and stabilize the programming operation to a control electrode of a drive transistor even if a data signal is small, there is provided a programming apparatus for programming signals which are supplied to a circuit array ( 61, 62 ) having a plurality of circuits each having transistors (M 11 , M 12 ), first switching elements (M 21 , M 22 ) connected to control electrodes of the transistors, and second switching elements (M 31 , M 32 ) each connected to one main electrode of each of the transistors. The programming apparatus has: a current generating circuit (M 3 , M 4 ) which is connected in common to each of the second switching elements of the circuit array and generates a current corresponding to a current flowing in the transistor of the selected circuit; and an operational amplifier (OPAMP 1 ) which is connected in common to each of the first switching elements of the circuit array and supplies the program signal to the control electrode of the transistor of the selected circuit. A data signal and a signal corresponding to the current generated by the current generating circuit are inputted to the operational amplifier.