Inkjet head and an inkjet recording device

摘要

According to one embodiment, the inkjet head of an application example includes a pressure chamber for charging the ink, an actuator for changing the volume of the pressure chamber, a nozzle for discharging the ink inside the pressure chamber when the volume of the pressure chamber is changed, and a controller that, in the formation of one pixel by discharging ink drops from the nozzle, when the elapsed interval from discharging ink drops last time by the nozzle is less than the specified interval, outputs the discharging waveform corresponding to the ink drop number determined for the formation of the pixel, and when the elapsed interval is more than the specified interval, increases the number of ink drop discharge cycles above the number determined for the formation of the pixel.

主权项

1. An inkjet head comprising:
a pressure chamber for storing and pressurizing ink; an actuator for changing the volume of the pressure chamber according to a discharging waveform; a nozzle for discharging ink stored inside the pressure chamber when the volume of the pressure chamber is decreased by the actuator in response to a discharge cycle in the discharging waveform; a temperature sensor for detecting a temperature of the ink; and a controller for providing the discharging waveform for controlling the actuator; wherein: the controller sets a number of the discharge cycles in the discharging waveform to a first number based on a gradation value of a pixel to be printed when an elapsed time interval between the discharging of ink is less than a first specified time interval, the controller sets the number of discharge cycles in the discharging waveform to a second number greater than the first number when the elapsed time interval between the discharging of ink is greater than the first specified time interval, and the first specified time interval is set to be more than a reference time interval if the detected temperature of the ink is more than a reference temperature, and the first specified time interval is set to be less than the reference time interval if the detected temperature of the ink is less than the reference temperature.