Patent ID: 9199451
Filing Date: 2015-12-01
Classification: B41J

Abstract:
1. A substrate comprising: a discharging unit including an element configured to discharge liquid from a nozzle and a transistor configured to drive the element; a logic circuit unit configured to be supplied with a first power supply voltage and to receive data; a unit configured to be supplied with a second power supply voltage and to output a signal from the logic circuit unit to a control terminal of the transistor; a voltage generation unit configured to be supplied with a third power supply voltage and to generate, using the third power supply voltage, the second power supply voltage to be supplied to the unit; a monitor unit configured to be supplied with the third power supply voltage to monitor a potential of a node supplied with the first power supply voltage; and a controlling unit configured to control supply of the third power supply voltage to the voltage generation unit, wherein when a monitor result by the monitor unit indicates that the first power supply voltage is not supplied to the logic circuit unit, the controlling unit does not supply the third power supply voltage to the voltage generation unit.