JP2007144868A5 - - Google Patents

Claims (4)

An inkjet printer provided with a drive means to apply a drive signal for ink droplet ejection actuator of nozzles for ejecting Lee ink droplets,
Detecting the frequency characteristic of the driving circuit including the actuator upon application of a frequency characteristic detection drive signal to the actuator of nozzles for discharging the ink droplets, the ink in the filter of the frequency characteristic and the inverse of the frequency characteristic through droplet ejection drive signals, inkjet printer and supplying the filter pass component of the frequency characteristic and the inverse of the frequency characteristics to hear dynamic circuit before addition to the ink droplet ejection drive signal. An actuator which is provided for the mounting nozzle, the printing data output means for outputting the print data indicating for ejecting ink droplets of the amount of the degree of any nozzle or rads based on the print data, before Kishirushi shaped Drive means for applying an ink droplet ejection drive signal to an actuator of a nozzle that ejects ink droplets based on data and ejecting ink droplets from the nozzle;
Said driving means, before Symbol ink droplet ejection drive signal preceding the ink droplet non-ejection time series sequence to the frequency characteristics detection drive signal setting hand stage frequency characteristic detection drive signal of, based on said print data wherein the frequency characteristic detection drive signal and the ink droplet ejection driving signals one is selected-option selection whether to apply or more actuator same said frequency characteristic detection drive signal and the ink droplet to any of the actuator selection means to apply an ejection driving signal, the frequency characteristics detection means to detect the frequency characteristic of the drive circuit including the actuator when the frequency characteristic detection drive signal is applied, detected by the frequency characteristics detection means inverse frequency characteristic filter setting means to set the inverse frequency characteristic filter of the frequency characteristic and the inverse of the frequency characteristics, the ink droplet ejection drive signal Inkjet printers but that comprising the frequency characteristic amended driving signal output hands stage supplied to the driving circuit in addition to the initial ink droplet ejection drive signal frequency components having passed through the inverse frequency characteristic filter. Wherein the frequency characteristic detection drive signal setting means, the frequency characteristic detection drive signal to all the preceding stage of each of the ink droplet ejection drive signal when the ink droplet ejection driving signal is chronologically linked Array
The inverse frequency characteristic filter setting means sets the inverse frequency characteristic filter of the frequency characteristic and the inverse of the frequency characteristics based on the frequency characteristics at the time of the detected individual frequency characteristics detection drive signal applied at the frequency characteristic detecting means The ink jet printer according to claim 2. The frequency characteristic detection means detects an actual signal value when the frequency characteristic detection drive signal is applied, and performs a fast Fourier transform.
The inverse frequency characteristic filter setting means, according to claim 2 or 3, characterized in that to set the inverse frequency characteristic filter based on the power spectrum value of the specific high frequency component of the Fast Fourier transformed real signal values The inkjet printer described in 1.