Patent ID: 7084575

Claim:
An organic EL panel drive circuit for generating drive currents for driving an organic EL display panel at a plurality of output pins of said organic EL panel drive circuit, which are provided corresponding to a plurality of terminal pins of said organic EL display panel, respectively, said organic EL panel drive circuit comprising: a plurality of first D/A converter circuits provided correspondingly to said output pins, for converting digital display data into first analog currents, respectively; a plurality of switch circuits provided correspondingly to said output pins, said switch circuits being adapted to ON/OFF control the first analog currents or drive current obtained by passing the first analog currents through output stage current sources provided correspondingly to said output pins; a second D/A converter circuit having a least significant bit resolution of which is higher than the least significant bit of each said first D/A converter circuit, for generating a second analog current as a reference current by D/A-converting data corresponding to the display data; a comparator circuit for comparing the first analog currents outputted through said switch circuits or the drive currents with the second analog current or a current obtained by passing the second analog current through an output stage current source; and a control circuit for turning said switch circuits ON one by one sequentially, a result of the comparison of said comparator being outputted externally.