US Patent 10994532 Liquid discharge apparatus and control method thereof

A liquid discharge apparatus includes a plurality of anti-cavitation layers formed to cover heat generating elements at positions where the anti-cavitation layers contact the liquid, a monitoring unit that detects a current flowing through the anti-cavitation layers, and a plurality of switching units that switch whether to apply, to the heat generating elements, a voltage for driving the heat generating elements. If the monitoring unit detects that a current greater than a predetermined value has flowed through one of the anti-cavitation layers while the voltage is applied to the heat generating elements, a control unit sequentially switches the plurality of switching units, and specifies the heat generating element corresponding to the anti-cavitation layer through which the current has flowed, among the heat generating elements.