Inkjet printer and image recording method

摘要

In an inkjet printer, for forming a large dot on a recording paper in the course of image recording, a second ejection pulse (721) and a first ejection pulse (713) are selected from a basic waveform (70), as a driving signal. For forming a medium dot, a first minute pulse (711) and the first ejection pulse (713) are selected. For forming a small dot, a third ejection pulse (722) is selected. At the time of non-ejection, a second minute pulse (712) is selected. As a result, by adjusting the waveform of the first minute pulse (711), it is possible to form high-quality dots of respective sizes while shortening a driving cycle with the use of the first ejection pulse (713) for forming a large dot and a medium dot.

主权项

1. An inkjet printer, comprising:
a recording part for ejecting droplets of ink from an outlet toward an object, to form dots of at least one size on said object; a moving mechanism for moving said object relatively to said recording part in a moving direction; and a controller for sequentially inputting signals to said recording part, said signals being instructions for ejection of droplets, in parallel with movement of said object relative to said recording part, wherein a driving signal used for ejection of a droplet is generated by selecting a part of a plurality of waveform elements included in a basic waveform in accordance with instructions given by said controller, said plurality of waveform elements include an ejection pulse used for ejection of a droplet and a plurality of minute pulses preceding said ejection pulse, in forming no dot on said object, a first minute pulse group which is at least a part of said plurality of minute pulses is selected, to achieve non-ejection in said recording part, in forming a dot of one size included in said at least one size, a second minute pulse group which is at least a part of said plurality of minute pulses and said ejection pulse are selected, to achieve ejection of a droplet from said outlet, said first minute pulse group and said second minute pulse group have different waveforms, said basic waveform is two waveform-element sequences running in parallel with each other, and said plurality of minute pulses are included in one of said two waveform-element sequences.