Patent ID: 6747617
Filing Date: 2004-06-08
Classification: G09G

Abstract:
A drive circuit for an organic EL apparatus having a plurality of organic EL elements performing multicolor light emission, comprising a plurality of DC power supply circuits for each one of colors of emitted lights from said respective organic EL elements, wherein a voltage from one of said DC power supply circuits is applied to one of said EL elements emitting one of colors of lights, which is different from the Voltage, applied to other organic EL elements emitting respective colored light therefrom,wherein each of said DC power supply circuits is a DC-DC converter, further comprising a plurality of current drive circuits, one of said plurality of current drive circuits being connected to an out put of one of said DC-DC converters so as to drive one of said EL elements, each of said current drive circuits being controlled by one of a plurality of first control signals responsive to a plurality of first color signals obtained form an image to be displayed, each one of said current drive circuits driving a different one of said organic EL elements, each one of said current drive circuits comprising two current mirror circuits.