Driving technique for printhead of thermal printer to improve print
quality
    21.
    发明授权
    Driving technique for printhead of thermal printer to improve print quality 失效
    热敏打印机打印头的驱动技术,以提高打印质量

    公开(公告)号:US5682504A

    公开(公告)日:1997-10-28

    申请号:US242718

    申请日:1994-05-13

    IPC分类号: B41J3/407 G06K15/02 G06K15/00

    CPC分类号: B41J3/4075 G06K15/028

    摘要: A printing apparatus is provided with a thermal head which has a plurality of heatable elements disposed in a line and divided into plural groups. A control unit controls the plural groups of heatable elements in accordance with printing data to generate heat to thermal-transfer ink of an ink ribbon onto a label tape, thereby printing the printing data on the label tape. A boundary heatable element within one group of heatable elements which is disposed adjacently to other group of heatable elements is driven in accordance with the printing data when the other group of heatable elements are driven to generate heat. The boundary heatable element generates heat twice to prints data twice on the label tape at a portion corresponding to the boundary between two groups of heatable elements, there by printing data on the portion with higher printing intensity. Further, while controlling the thermal head to generate heat, the control unit controls a stepping motor to advance the label tape in synchronism with heat generation by the thermal head, wherein the printing data are printed in elliptical patterns in a tape running direction.

    摘要翻译: 印刷装置具有热敏头,该热敏头具有多个可排列成一行的可加热元件并分成多组。 控制单元根据打印数据控制多组可加热元件,以产生热量,将墨带的墨水热转印到标签带上,从而将打印数据印在标签带上。 当驱动另一组可加热元件以产生热量时,根据打印数据驱动与一组可加热元件相邻设置的一组可加热元件内的边界可加热元件。 边界可加热元件产生热量两次,以在与两组可加热元件之间的边界对应的部分的标签带上打印数据两次,通过在具有较高印刷强度的部分上打印数据。 此外,在控制热敏头产生热量的同时,控制单元控制步进电动机,以通过热敏头产生热量同步地推进标签带,其中打印数据以带状运行方向的椭圆形图案打印。