Organic EL panel drive circuit and propriety test method for drive current of the same organic EL element drive circuit

摘要

First analog currents are obtained through a plurality of switch circuits provided correspondingly to output pins of an organic EL drive circuit as drive currents or through output stage current sources. The first analog currents or the drive currents are compared by a comparator provided within the organic EL element drive circuit with a second analog current (reference current) or a current obtained by passing the second analog current through a current source corresponding to the output stage current source. A result of comparison is outputted externally of the organic EL element drive circuit. The drive currents are obtained sequentially at the output pins by turning the switch circuits ON one by one sequentially by a control circuit to sequentially obtain the result of comparison for the drive currents from the organic EL element drive circuit.