| 摘要 |
The present invention is applied to, for example, a liquid crystal display in which a driving circuit is integrally formed on an insulating substrate, and after a sampling capacitor C 3 is charged with a reference current I 1 and a gate-source voltage Vgs of a transistor Q 14 due to the reference current I 1 is set in the sampling capacitor C 3, the transistor Q 14 is driven to function as a constant current circuit, by the voltage Vgs of the sampling capacitor C 3.
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