Abstract: An inkjet head includes a plurality of driving circuits, and ejecting ink in accordance with driving operation of the plurality of driving circuits based on a predetermined setting, wherein the plurality of driving circuits include a first driving circuit, and a second driving circuit electrically connected with the output of the first driving circuit, the first driving circuit includes a first storage unit, and a first setting output unit, and the second driving circuit includes a second storage unit, a second setting input unit, a second comparison unit, and a second result output unit.

Abstract: An inkjet head includes a plurality of driving circuits, and ejecting ink in accordance with driving operation of the plurality of driving circuits based on a predetermined setting, wherein the plurality of driving circuits include a first driving circuit, and a second driving circuit electrically connected with the output of the first driving circuit, the first driving circuit includes a first storage unit, and a first setting output unit, and the second driving circuit includes a second storage unit, a second setting input unit, a second comparison unit, and a second result output unit.

Abstract: A driving waveform has a first driving waveform (PLSTM1) composed of non-GND waveform, a second driving waveform (PLSTM2) composed of a non-GND waveform different from the first driving waveform, and a third driving waveform (PLSTM0) composed of a GND waveform, and a driving voltage V1 of the first driving waveform and a driving voltage V2 of the second driving waveform is |V1|>|V2|; and the driving circuit selects at least the first driving waveform and the second driving waveform or only the first driving waveform at every predetermined time in 1 pixel cycle in accordance with the discharge data, applies this to one of the two driving electrodes of the pressure generating unit and also applies only the second driving waveform to the other so as to operate the pressure generating unit by a differential waveform between the two driving electrodes.

Abstract: A driving waveform has a first driving waveform (PLSTM1) composed of non-GND waveform, a second driving waveform (PLSTM2) composed of a non-GND waveform different from the first driving waveform, and a third driving waveform (PLSTM0) composed of a GND waveform, and a driving voltage V1 of the first driving waveform and a driving voltage V2 of the second driving waveform is |V1|>|V2|; and the driving circuit selects at least the first driving waveform and the second driving waveform or only the first driving waveform at every predetermined time in 1 pixel cycle in accordance with the discharge data, applies this to one of the two driving electrodes of the pressure generating unit and also applies only the second driving waveform to the other so as to operate the pressure generating unit by a differential waveform between the two driving electrodes.

Abstract: An inkjet printer including a plurality of heads, wherein each head is provided with a drive signal generating circuit for creating a drive signal to drive each head, according to the control signal conforming to each head received from a relay board, image data, and a timing signal for determining the timed interval to emit ink particles.

Abstract: There is described an image-processing apparatus that is provided with a receiving section to receive jobs, each of which includes image data; an arithmetic calculating section to convert the image data to print data for every job; a storage section to store the jobs received by the receiving section and the print data converted by the arithmetic calculating section for every job; an outputting section to output the print data to a printing section for every job; and a controlling section to control a receiving processing applied for the jobs in the receiving section, a conversion processing applied for each of the jobs in the arithmetic calculating section and an output processing applied for each of the jobs in the outputting section. Accordingly, the image-processing apparatus can separately control a receiving state of each of the jobs, a converting state of each of the jobs and an outputting state of each of the jobs.

Abstract: An image data compression apparatus, in that a component characteristic value of an AC component in a block obtained by dividing digital tonal image data is compared with a predetermined threshold value so that a frequency of an AC component at the highest frequency side having the component characteristic value over the threshold value is determined as a boundary value, and in that the AC component exceeding the boundary value is not handled as a substantial transform coefficient. When the transform coefficients in a high-frequency side in the block is cut according to an image content of the block a lower limit of a frequency to be cut is determined, so that a frequency lower than the lower limit determined may not be cut.