ORGANIC EL DRIVE CIRCUIT FOR REDUCING CHANGE OF DRIVE CURRENT IN CURRENT DRIVER IC FOR DRIVING ORGANIC EL PANEL AND ORGANIC EL DISPLAY DEVICE USING THE SAME

摘要

PURPOSE: An organic EL drive circuit and an organic EL display device are provided to reduce a change of luminance on a screen of the organic EL display device caused by a difference of characteristics between current driver ICs and a change of a driver current in current driver IC. CONSTITUTION: An organic EL panel drive circuit(10) includes first and second column driver ICs(11,12). Each of the first and the second column driver ICs includes a reference current generator circuit(1) and a current output circuit(2). The organic EL panel drive circuit further includes a first current mirror circuit(13), a first transistor, and a control circuit. The first current mirror circuit includes an input transistor supplied with a preset drive current and a plurality of output transistors for generating an output current which is distributed to terminal pin corresponding to the organic EL panel. The first transistor is used for generating a first current corresponding to the output current of the output transistor. The control circuit includes an input stage driven by the first current and an arbitrary reference current and an output stage for generating the preset drive current corresponding to a difference between the first current and the arbitrary reference current.