摘要 |
A printing head has a plurality of heater boards, each of which includes a shift register to which printing data and selection data for selecting preheating pulse signals are applied as inputs, a latch circuit for latching the printing data, a selection-data latch circuit for latching the selection data, a selection circuit for selecting any one of a plurality of preheating pulse signals inputted in accordance with the latched selection data, and a plurality of heating resistors driven by the printing data or preheating pulse signals. Correction data, obtained by a head correcting apparatus, for performing printing at an average density by correcting the characteristics of each heater board is stored in a memory of the printing head. A printing apparatus decides the selection data in accordance with the correction data and sets the selection data in the selection-data latch circuit. <IMAGE> |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
IMANAKA, YOSHIYUKI;INABA, MASAKI;IKEDA, MASAMI;KOIZUMI, YUTAKA;ORIKASA, TSUYOSHI;FURUKAWA, TATSUO;KASHINO, TOSHIO;KISHIDA, HIDEAKI;KARITA, SEIICHIRO;KOYAMA, SHUJI;TERAI, HARUHIKO;HAYASAKI, KIMIYUKI;KATAO, SHUICHI;GOTO, AKIRA;OMATA, KOUICHI;MARU, HIROYUKI;IZUMIDA, MASAAKI;KAMIYAMA, YUJI;ONO, TAKAYUKI |