| 摘要 |
A current driver that can control variation in the consumed current in conjunction with variation in the setting value of the driving current. The mirror current of transistors Q 2 - 0 to Q 2 - 7 at each of output circuits 10 - 1 to 10 - 160 keeps flowing through output terminal To 1 or node N 8 irrespective of the setting value of the pixel data. Also, the mirror current of transistor Q 4 D keeps flowing in the series circuit of transistors Q 4 D and Q 5 D irrespective of the setting value of the pixel data. Consequently, even when the setting value of the driving current varies in various ways, the current consumed in each output circuit can still be kept constant. As a result, it is possible to prevent variation in the voltage of the power supply line in conjunction with variation of the consumed current, and it is possible to reduce fluctuation in the driving current between output channels.
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