REFERENCE CURRENT GENERATOR CIRCUIT OF ORGANIC EL DRIVE CIRCUIT, ORGANIC EL DRIVE CIRCUIT AND ORGANIC EL DISPLAY DEVICE USING SAME

摘要

PROBLEM TO BE SOLVED: To provide an organic EL drive circuit and a reference current generator circuit that can prevent light emission luminance of a display device from varying in display device use temperature environment in a wide range.

SOLUTION: A first current mirror circuit including an input side transistor, an output transistor and passive elements respectively connected in series with the input side transistor and the output side transistor, temperature coefficients of the passive elements being opposite in characteristics and a second current mirror circuit provided as a load circuit of the first current mirror circuit, for feeding back an output current of the output side transistor to an input of the input side transistor are provided. A drive current is generated on a basis of a current corresponding to a current generated in the output side transistor as a reference current and an operating current ratio of the input side transistor and the output side transistor is selected such that luminance change of organic EL elements with respect to temperature change is restricted.

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