US 12,179,483 B2 · Liquid ejection head

Abstract

According to one embodiment, a liquid ejection head includes a nozzle plate, pressure chambers, actuators, and a drive circuit. The nozzle plate includes nozzles for ejecting liquid. The pressure chamber communicates with the nozzles. The actuator varies the volume of the pressure chamber according to a drive signal. The drive circuit generates the drive signal for driving the actuator. The ejection waveform in the drive signal includes an expansion potential difference changes that changes in stages and a contraction potential difference change that changes in stages. The drive circuit sets the timing of the stages to cancel the vibration of an acoustic resonance frequency in a frequency range higher than a main acoustic resonance frequency of the liquid in the pressure chamber.

Claims20

Dependent claims

A liquid ejection head, comprising:

a nozzle plate including nozzles for ejecting liquid;
a plurality of pressure chambers communicating with the nozzles;
a plurality of actuators configured to vary the volume of the pressure chambers according to drive signals applied thereto;
and
a drive circuit configured to generates drive signals for driving the plurality of actuators, wherein
the drive circuit generates a drive signal including an ejection waveform for an actuator with an expansion potential difference change that changes in stages and a contraction potential difference change that changes in stages, and sets the timing of the stages to cancels the vibration of an acoustic resonance frequency in a frequency range higher than a main acoustic resonance frequency of a liquid in the pressure chamber.

3 more elements

Dependencies are inferred from the claim text.

Liquid ejection head

Life of this patent

Liquid ejection head

Life of this patent

Abstract

Claims20