Patent ID: 6859193

Claim:
A current drive circuit for supplying a drive current to a driven object, including: a control line, a signal line to which a signal current having a current level in accordance with information is supplied, a receiving part for fetching the signal current from the signal line when the control line is selected, a converting part for converting a current level of the fetched signal current to a voltage level and holding the same, and a drive part for converting the held voltage signal to a current signal and outputting the drive current, wherein the converting part includes a conversion use transistor provided with a control terminal, a first terminal, and a second terminal and a capacitor connected to the control terminal, the drive part shares the conversion use transistor together with the converting part in a time division manner and the drive part separates the conversion use transistor from the receiving part and uses the same for driving after the conversion of the signal current is completed and passes the drive current in a state where the held voltage level is applied to the gate of the conversion use transistor.