Abstract: A recording system includes a line head having a plurality of nozzles arranged in a Y direction, a LF motor for feeding a role sheet in an X direction, and a CR motor for shifting a set position of the line head sequentially. When the set position of the line head is shifted by a given distance in the Y direction, the recording system converts image data in such a manner that an image is shifted in an opposite direction by a distance equal to the given distance so that the same image is recorded in different positions of the nozzles.

Abstract: A recording direction setting section successively sets recording directions of an image. A recording data generating section generates data for recording the image from the recording direction set by the recording direction setting section. A recording data analyzing section analyzes the operation of a line head performed when recording is carried out in accordance with the data generated by the recording data generating section. A recording direction determining section determines a recording direction so as to minimize the discharging frequency of a nozzle with the largest discharging frequency among a plurality of nozzles of the line head.

Abstract: A recording apparatus provided with a plurality of print line heads 1 for respective colors and thereby performing color printing, in which at least a few of head lines 1 are placed by being offset in the Y direction perpendicular to the X direction which is a relative transportation direction of a recording medium 5.

Abstract: In a head drive unit of ink-jet recorder and the like, for the purpose of reducing amount of data for head driving waveform and data processing time, a time data at a point where an electric current changes and an electric current data are stored in time data storage means and electric current data storage means, and the time data is compared with a count data of an address counter. The electric current data is then output to drive a head, when the data matches as a result of the comparison.

Abstract: In a head drive unit of ink-jet recorder and the like, for the purpose of reducing amount of data for head driving waveform and data processing time, a time data at a point where an electric current changes and an electric current data are stored in time data storage means and electric current data storage means, and the time data is compared with a count data of an address counter. The electric current data is then output to drive a head, when the data matches as a result of the comparison.

Abstract: An electronic blackboard device capable of performing color printing. Data read by an image sensor is converted to digital data by an A/D converter and provided via a shading correcting circuit and a converter to a printer control circuit, which causes a color printer to print the appropriate data in a color corresponding to a marker.