Back to results
US 8,770,692 B2Granted
Crosstalk reduction in piezo printhead
AssigneeHewlett-Packard Development Company, L.P.
InventorsAndrew L. Van Brocklin, Neel Banerjee
Life of this patent
Estimating the term…
Abstract
Crosstalk in a piezo printhead is reduced by storing a coefficient that expresses an amount of crosstalk between a first nozzle and an adjacent nozzle. A drive waveform voltage is pre-biased using the coefficient, and the pre-biased waveform is applied to a piezoelectric material of the first nozzle.
Claims9
A method to reduce crosstalk in a piezo printhead comprising:
- storing a coefficient that expresses an amount of crosstalk between a first nozzle and an adjacent nozzle;
- pre-biasing a drive waveform voltage using the coefficient by summing to the drive waveform voltage, a scaled copy of a second drive waveform voltage for the adjacent nozzle;
- and
- applying the pre-biased drive waveform voltage to a piezoelectric material of the first nozzle.
1 more element
A printhead assembly comprising a crosstalk reduction circuit to transform a voltage drive waveform of a first nozzle to compensate for crosstalk from an adjacent nozzle wherein the crosstalk reduction circuit comprises:
- a storage element to store a coefficient that expresses an amount of crosstalk between the first nozzle and the adjacent nozzle;
- a multiplier to generate a scaled copy of a second drive waveform voltage for the adjacent nozzle;
- and
- a summing element to sum the scaled copy to a first drive waveform voltage associated with the first nozzle.
1 more element
Dependencies are inferred from the claim text.