Patent ID: 7615932

Claim:
A reference current generation circuit in an organic EL drive circuit which respectively produces drive currents corresponding to respective many terminal pins in an organic EL panel and current-drives the organic EL panel comprising: a first, a second and a third D/A converter block, each of which is constituted by a plurality of switch circuits and a plurality of output side transistors of a current mirror circuit, provided for one of corresponding three primary colors of R, G and B and respectively generates converted analog current as a reference current, a first changeover switch circuit which selects one of respective reference currents corresponding to R, G and B, a second changeover switch circuit which selects another of respective reference currents corresponding to R, G and B, a third changeover switch circuit which selects the remaining one of respective reference currents corresponding to R, G and B and a control circuit for performing a control which successively switches in response to line scanning for a display screen the selection of the reference current by the first, the second and the third changeover switch circuit so that drive currents generated corresponding to respective terminal pins correspond to a dot arrangement of R, G and B in the organic EL panel.