Patent ID: 7098905

Claim:
A drive circuit of an active matrix type organic EL display panel, for current-driving an active matrix type organic EL display panel having a plurality of pixel circuits arranged in matrix, each said pixel circuit including an organic EL element, a capacitor for storing a voltage value corresponding to a value of a drive current of said organic EL element and a plurality of transistors for supplying the drive current to said organic EL element correspondingly to the voltage value, said drive circuit comprising: a plurality of current drive circuits each provided for a data line or a column pin of said organic EL display panel, each said current drive circuit having an output pin connected to said data line or said column pin and generating a current for charging said capacitor of each said pixel circuit through said data line or said column pin and a current for initially charging said organic EL element; and a write control circuit for controlling a write for storing the voltage value in said capacitor and for controlling a resetting the written voltage value of said capacitor, wherein the current for charging said capacitor to the voltage value is generated correspondingly to one of a current pulled out from said output pin to said pixel circuit and a current pulled in from said pixel circuit to said output pin and the current for initially charging said organic EL element is generated correspondingly to one of another current pulled out from said output pin to said pixel circuit and another current pulled in from said pixel circuit to said output pin.