Patent ID: 7760163

Claim:
A drive circuit of an electro-optical device comprising electro-optical elements of which each gray scale is controlled in accordance with a data signal output to a data line, the driving circuit comprising: a reference current generating unit that generates a reference current; a signal output unit that generates the data signal corresponding to a current value of the reference current on the basis of gray-scale data and outputs the generated data signal to the data line; a data line switch that turns ON and OFF an output of the data signal output to a data line, a compensation transistor coupled to a current mirror circuit, the current mirror circuit biased with a current mirror reference voltage circuit; and a voltage supply circuit that performs the refresh operation of supplying an ON voltage, allowing the compensation transistor to be turned on, to the gate terminal of the compensation transistor plural times, and turns on the current mirror reference voltage circuit, wherein the compensation transistor is coupled to the voltage supply circuit, the data line switch is turned OFF during an entire period that the voltage supply circuit supplies an ON voltage, the reference current generating unit performs a refresh operation of setting the current value of the reference current to a predetermined value plural times, and the reference current generating unit comprises a switching element that controls an electrical connection and disconnection between a voltage supply line and a compensation transistor.