Liquid jet apparatus and printing apparatus
View Patent ↗A liquid jet apparatus according to the present invention includes a drive circuit adapted to apply a drive signal to an actuator of a liquid jet head, and a power supply voltage control circuit adapted to control a power supply voltage to the drive signal to be a waveform voltage set previously based on a reference signal obtained from one of the drive signal and a signal in a generation stage of the drive signal.
1. A liquid jet apparatus comprising:
a drive circuit adapted to apply a drive signal to an actuator of a liquid jet head, the drive circuit also being configured to generate a reference signal based on the drive signal such that the reference signal has a high level when the drive signal is higher than a predetermined voltage and such that the reference signal has a low level when the drive signal is lower than the predetermined voltage; and
a power supply voltage control circuit adapted to control a power supply voltage to the drive signal of the drive circuit to be a voltage based on the reference signal obtained from the drive circuit,
wherein the power supply voltage control circuit includes:
a bootstrap circuit adapted to control stepping up of the power supply voltage based on a reference signal; and
a diode adapted to prevent back-flow is disposed on an output side of the bootstrap circuit.
2. A printing apparatus comprising:
a liquid jet apparatus having
a drive circuit adapted to apply a drive signal to an actuator of a liquid jet head the drive circuit also being configured to generate a reference signal based on the drive signal such that the reference signal has a high level when the drive signal is higher than a predetermined voltage and such that the reference signal has a low level when the drive signal is lower than the predetermined voltage, and
a power supply voltage control circuit adapted to control a power supply voltage to the drive signal of the drive circuit to be a voltage based on the reference signal obtained by the drive circuit,
wherein the power supply voltage control circuit includes:
a bootstrap circuit adapted to control stepping up of the power supply voltage based on a reference signal; and
a diode adapted to prevent back-flow is disposed on an output side of the bootstrap circuit.