Head driving device of liquid jetting apparatus and method of driving the same
AssigneeSeiko Epson Corporation
InventorAtsushi Umeda
Life of this patent
Estimating the term…
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.
Claims8
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.
A method of driving a head driving device, comprising the steps of:
- providing a first current amplifying circuit;
- providing a second current amplifying circuit;
- providing a driving element;
- generating a driving waveform to drive the driving element;
- amplifying the driving waveform by the first current amplifying circuit;
- amplifying a part of a current to be supplied to the first current by the second current amplifying circuit when a current flowing through the first current amplifying circuit exceeds a predetermined value;
- and
- supplying the driving waveform amplified by the first current amplifying circuit and the part of the current amplified by the second current amplifying circuit to the driving element.
Dependencies are inferred from the claim text.