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公开(公告)号：EP4431297A1
公开(公告)日：2024-09-18
申请号：EP24161901.4
申请日：2024-03-06
发明人： KITAMURA, Yoshio , YOSHIDA, Daisuke , UNO, Ryuji , HATAKEYAMA, Koichi , KONDO, Hiroaki , NAKA, Ryota , HISADA, Takahiro
CPC分类号： B41J2/355 , B41J2/32 , G06K15/028
摘要： A control device (20) includes: a print data acquisition unit (210) unit configured to acquire print data, which is formed of a plurality of lines and indicates a coloration state of each pixel included in the plurality of lines; a head drive unit (250) configured to supply, to a thermal head (120) formed of a plurality of heating elements (H) each corresponding to the pixel, an electric current for heating the thermal head (120) for each pixel; a motor drive unit (230) configured to supply, to a motor (110) configured to move heat-sensitive paper (310) relative to the thermal head (120), a drive current for step driving the motor (110) for each line; a speed control unit (220) configured to control, based on the number of colored pixels of a determination subject line (LB) among yet-to-be-printed lines (LN) of the print data, a relative moving speed of the heat-sensitive paper (310) moved by the motor (110); and a preheating control unit (240) configured to cause the head drive unit (250) to output, when the determination subject line (LB) is a specific line (LD) being a line in which the number of colored pixels of the determination subject line (LB) exceeds a predetermined value, a preheating current being an electric current for heating the thermal head (120) to such a degree as to prevent coloring of the heat-sensitive paper (310) by a time the specific line (LD) is printed.
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公开(公告)号：EP3871888A1
公开(公告)日：2021-09-01
申请号：EP21159609.3
申请日：2021-02-26
IPC分类号： B41J2/36
摘要： A thermal head control device (514) includes: a printing rate calculation range determination unit (142) configured to determine, as a printing rate calculation range, a range from a left-end energization dot to a right-end energization dot among energization dots present in printing data corresponding to heating elements (42) to be controlled among a plurality of heating elements (42) included in a thermal head (41); a printing rate calculation unit (143) configured to calculate a printing rate of the printing rate calculation range determined by the printing rate calculation range determination unit (142); an energizing time calculation unit (144) configured to calculate an energizing time for which a current is caused to flow through the heating elements (42) based on the printing rate calculated by the printing rate calculation unit (143); and an output unit (150) configured to output a control signal for driving the heating elements (42) to be controlled of the thermal head (41), based on the calculated energizing time.
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