Patent ID: 7508362

Claim:
A method of driving an electronic circuit, the electronic circuit comprising: a power line; an element to be driven; a driving transistor inserted between the power line and the element for controlling an amount of current flowing through the element; a first switching element switched on or off between a gate and a drain of the driving transistor; and a voltage storage element, one end being connected to the gate of the driving transistor, wherein the method of driving an electronic circuit comprises: a first period step of flowing a current between the power line and an initial voltage supply line, to which an initial voltage is applied, through the driving transistor while switching on the first switching element and of electrically connecting the drain or the gate of the driving transistor to the initial voltage supply line, and short-circuiting both ends of the voltage storage element, so that the voltage across the voltage storage element becomes less than a threshold voltage of the driving transistor while the current is flowing; a second period step of disconnecting electrical connection between the drain or the gate of the driving transistor and the initial voltage supply line and of maintaining the switching on of the first switching element to maintain the gate of the driving transistor; a third period step of switching off the first switching element and of shifting a voltage of the other end of voltage storage element from the initial voltage to a predetermined voltage so as to maintain a gate voltage of the driving transistor to have a target voltage corresponding to the amount of current to flow to the element to be driven; and a fourth period step of allowing the driving transistor to flow current in accordance with the maintained gate voltage to the element to be driven.