Patent ID: 6932452
Filing Date: 2005-08-23
Classification: B41J

Abstract:
1. An on-demand inkjet printer comprising: an inkjet head which moves in the main scanning direction of a recording medium; a drive waveform generator unit for generating a drive waveform for emitting an ink particle to form dots of a same size, in a cycle that is 1/n of the cycle for one pixel, with one pixel including a maximum number of n ink particles; a print data generator unit for generating print data of a plurality of bits for selecting said drive waveform within the cycle for one pixel; and a head drive unit for driving the nozzles of said head, by selecting said drive waveform in accordance with said print data, wherein said print data generator unit includes a decoder for generating print data corresponding to a smoothing pattern, and wherein the decoder comprises a pattern table, to which it refers, for converting the data in order to perform smoothing by controlling the emission timing for each ink particle.