Image forming apparatus and method of driving and controlling head

摘要

An image forming apparatus includes a liquid ejection head including a pressure generation unit configured to generate a pressure for pressurizing a liquid in an individual liquid chamber communicating nozzles; and a head drive control unit configured to generate a drive waveform including pulses in time series, select one or more pulses from the drive waveform according to a droplet size, and provide the selected drive pulses to the pressure generation unit. The drive waveform includes a first pulse not including a waveform component that suppresses ejection bending, and allowing a droplet to be ejected, and a second pulse including the waveform component that suppresses ejection bending, and allowing a droplet to be ejected. An amount of the droplet ejected in the second pulse is larger than in the first pulse, and a speed of the droplet ejected in the second pulse is higher than that in the first pulse.

主权项

1. An image forming apparatus comprising:
a liquid ejection head including a plurality of nozzles configured to eject a liquid droplet, an individual liquid chamber to which the nozzles communicate, and a pressure generation unit configured to generate a pressure for pressurizing a liquid in the individual liquid chamber; and a head drive control unit configured to
generate a drive waveform including a plurality of pulses in time series,select one or more pulses from the drive waveform according to a droplet size, andprovide the selected drive pulses to the pressure generation unit, wherein the drive waveform at least includes a first pulse not including a waveform component that suppresses ejection bending, and allowing a droplet to be ejected, and following the first pulse, a second pulse including the waveform component that suppresses ejection bending, and allowing a droplet to be ejected, and a droplet amount of the droplet ejected in the second pulse is larger than a droplet amount of the droplet ejected in the first pulse, and a droplet speed of the droplet ejected in the second pulse is higher than a droplet speed of the droplet ejected in the first pulse.