Inkjet Nozzle Timing Control for Landing Position Deviation

The patent applies preliminary action by adjusting the discharge timing of end portion nozzles in advance. Specifically, the control unit causes nozzles at the end portions of the nozzle row to discharge ink droplets at different timings compared to intermediate nozzles, thereby preemptively compensating for the air current effects that would otherwise cause landing position deviation. This timing adjustment is performed before the droplets are discharged, preventing the precision problem while maintaining high productivity.

The patent applies parameter changes by modifying the discharge timing parameter rather than changing the flight speed or droplet weight. The control unit adjusts the temporal parameter (discharge timing) of end portion nozzles relative to intermediate nozzles, creating a time difference that compensates for air current effects. This approach achieves improved landing position precision without increasing droplet weight, thereby avoiding the trade-off between precision and print quality.

The patent applies the taking out principle by extracting the flight direction control function from the mechanical structure and transferring it to the control unit through timing adjustment. Instead of adding pressure generating elements to physically control droplet direction, the invention removes this structural requirement and achieves the same effect by controlling when each nozzle discharges its droplet. This significantly reduces device complexity while maintaining manufacturing precision.