Circuit for driving a light emitting elements display device

摘要

A current is detected through a resistor which is electrically connected in series with an FET for driving an associated one of display elements; the resultant signal is inputted to an operational amplification circuit through a capacitor to be amplified therein; and an output signal from the operational amplification circuit is converted into digital data in an A/D conversion circuit to be applied to a drive control circuit. In the drive control circuit, the amount of electric charges which have been caused to flow through the associated one of the display elements is arithmetically determined, and a period of time when the FET is kept turned ON is controlled in dependence on the amount of electric charges thus arithmetically determined.