Head driving device of liquid jetting apparatus and method of driving the same
AssigneeSeiko Epson Corporation
InventorAtsushi Umeda
Life of this patent
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Abstract
A head driving device of a liquid jetting apparatus includes a driving element, respectively provided corresponding to plural nozzles from which a liquid droplet is jetted, a driving waveform generating circuit, generating a driving waveform to drive the driving element selectively at predetermined jetting timing, a current amplifying circuit, amplifying the driving waveform and a current amplifying element, connected in parallel with an amplifying element of the current amplifying circuit. The current amplifying element is operated when a current value of the current amplifying circuit exceeds a predetermined value.
Claims17
A head driving device of a liquid jetting apparatus, comprising:
- a driving element, respectively provided corresponding to plural nozzles from which a liquid droplet is jetted;
- a driving waveform generating circuit, generating a driving waveform to drive the driving element selectively at predetermined jetting timing;
- a current amplifying circuit, amplifying the driving waveform;
- and
- a current amplifying element, connected in parallel with an amplifying element of the current amplifying circuit,
- wherein the current amplifying element is operated when a current value of the current amplifying circuit exceeds a predetermined value,
- wherein a first driving waveform from the current amplifying circuit and a second driving waveform from the current amplifying element, are supplied to the driving element,
- wherein a resistor and a diode connected in series to each other are arranged between the current amplifying element and the driving element, and
- wherein a grounded capacitor is connected to a connection point between the resistor and the diode.
Dependencies are inferred from the claim text.