Ink-jet Printer Discharge Timing Control for Nozzle Inclination

The patent applies local quality by differentiating the ink discharge timing control based on the positional relationship between the nozzle alignment direction and transport direction. Specifically, when the alignment direction is inclined relative to the transport direction, the discharge timing is selectively adjusted only for nozzles in the inclined direction while maintaining reference timing for others. This localized adjustment corrects image quality issues without uniformly affecting all margins, thereby resolving the contradiction between improving image quality and maintaining uniform margin lengths.

The patent applies preliminary action by pre-calculating and storing the optimal discharge timing adjustments for each nozzle position based on the known inclination angle. During actual recording operations, the system simply retrieves and applies these pre-determined timing values without performing complex real-time calculations. This approach maintains high landing position accuracy while minimizing the time penalty, as the computationally intensive work is done beforehand rather than during each scan.