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;KOIZUMI, YUTAKA;KISHIDA, HIDEAKI;KOYAMA, SHUJI;KATAO, SHUICHI;MARU, HIROYUKI;INABA, MASAKI;ORIKASA, TSUYOSHI;KASHINO, TOSHIO;TERAI, HARUHIKO;GOTO, AKIRA;IZUMIDA, MASAAKI;IKEDA, MASAMI;FURUKAWA, TATSUO;KARITA, SEIICHIRO;HAYASAKI, KIMIYUKI;OMATA, KOUICHI;KAMIYAMA, YUJI;ONO, TAKAYUKI |