Canon Kabushiki Kaisha

Shuichi Katao

Yoshiyuki Imanaka

Tatsuo Furukawa

Masaaki Izumida

Yuji Kamiyama

Hiroyuki Maru

Fumio Murooka

Masami Ikeda

Toshio Kashino

Seiichiro Karita

Yutaka Koizumi

Shuji Koyama

Akira Goto

Kimiyuki Hayasaki

Takayuki Ono

Tsuyoshi Orikasa

Haruhiko Terai

Hideaki Kishida

Kouichi Omata

Masaki Inaba

Substrate for thermal recording head, ink jet recording head using the substrate, recording apparatus with the recording head, and method of driving recording head

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.

Printing head, printing method and apparatus using same, and apparatus and method for correcting said printing head

This invention has as its object to provide a substrate for an ink jet recording head, which is compact and can realize stable recording with high reliability, a recording head using the substrate, a recording apparatus mounting the recording head, and a method of driving the recording head. There are disclosed a substrate for a thermal recording head, having a plurality of heating resistor elements, a plurality of wiring electrodes for supplying driving signals to the heating resistor elements, a function element, electrically connected to the heating resistor elements, for selectively driving the plurality of heating resistor elements, and a measurement resistor element which is electrically independent form the heating resistor elements and the function element, and haws a resistance value larger than that of each heating resistor element, an ink jet head, a head cartridge, and a recording apparatus utilizing the substrate, and a method of driving a recording head using a measurement resistor.

Substrate for thermal recording head, ink jet recording head using the substrate, recording apparatus with the recording head, and method of driving record head

Printing head, printing method and apparatus using same, and apparatus

This invention has as its object to provide a substrate for an ink jet recording head, which is compact and can realize stable recording with high reliability, a recording head using the substrate, a recording apparatus mounting the recording head, and a method of driving the recording head. There are disclosed a substrate for a thermal recording head, having a plurality of heating resistor elements, a plurality of wiring electrodes for supplying driving signals to the heating resistor elements, a function element, electrically connected to the heating resistor elements, for selectively driving the plurality of heating resistor elements, and a measurement resistor element which is electrically independent from the heating resistor elements and the function element, and has a resistance value larger than that of each heating resistor element, an ink jet head, a head cartridge, and a recording apparatus utilizing the substrate, and a method of driving a recording head using a measurement resistor.

Substrate for thermal recording head, ink jet recording head using the

A constant current circuit comprises a junction type field effect transistor and a bipolar transistor. The channel forming region of the junction type field effect transistor and the base region of the bipolar transistor are constituted to be common to each other.

Constant current circuit and integrated circuit having said circuit

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Atsugi, Japan

Shuichi Katao