公开(公告)号：US20240308240A1

公开(公告)日：2024-09-19

申请号：US18600275

申请日：2024-03-08

Applicant: Seiko Instruments Inc.

Inventor： Yoshio KITAMURA ,  Daisuke YOSIDA ,  Ryuji UNO ,  Koichi HATAKEYAMA ,  Hiroaki KONDO ,  Ryota NAKA ,  Takahiro HISADA

IPC: B41J2/38 ,  B41J2/355 ,  B41J29/393 ,  G06F3/12

CPC classification number: B41J2/38 ,  B41J2/355 ,  B41J29/393 ,  G06F3/1211

Abstract: A control device includes: a print data acquisition 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 configured to supply, to a thermal head formed of a plurality of heating elements each corresponding to the pixel, an electric current for heating the thermal head for each pixel; a motor drive unit configured to supply, to a motor configured to move heat-sensitive paper relative to the thermal head, a drive current for step driving the motor for each line; a speed control unit configured to control, based on the number of colored pixels of a determination subject line among yet-to-be-printed lines of the print data, a relative moving speed of the heat-sensitive paper moved by the motor; and a preheating control unit configured to cause the head drive unit to output, when the determination subject line is a specific line being a line in which the number of colored pixels of the determination subject line exceeds a predetermined value, a preheating current being an electric current for heating the thermal head to such a degree as to prevent coloring of the heat-sensitive paper by a time the specific line is printed.

公开(公告)号：US20210268807A1

公开(公告)日：2021-09-02

申请号：US17180116

申请日：2021-02-19

Applicant: Seiko Instruments Inc.

Inventor： Yuichi YOSHIGI ,  Daisuke YOSHIDA ,  Yohei ISHIDOYA ,  Hiroaki KONDO

IPC: B41J2/355

Abstract: A thermal head control device includes: a printing rate calculation range determination unit 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 to be controlled among a plurality of heating elements included in a thermal head; a printing rate calculation unit configured to calculate a printing rate of the printing rate calculation range determined by the printing rate calculation range determination unit; an energizing time calculation unit configured to calculate an energizing time for which a current is caused to flow through the heating elements based on the printing rate calculated by the printing rate calculation unit; and an output unit configured to output a control signal for driving the heating elements to be controlled of the thermal head, based on the calculated energizing time.