Patent Number: 8,070,263

Title: Printing head substrate, ink jet printing head and ink jet printing apparatus with substrate temperature detecting element

Abstract: There are provided a printing head substrate, an ink jet printing head and an ink jet printing apparatus, which accurately detect a temperature state in the central part of a heater array on the substrate and restrict an area of the substrate to a minimum. A printing head substrate has a plurality of heating elements, a plurality of ink supply openings, a logic circuit for driving the heating elements; a substrate temperature detecting element for detecting a temperature of the printing head substrate, and input and output pads for carrying out reception and supply of a signal between a printing apparatus, and the logic circuit and the substrate temperature detecting element, wherein a beam integral with the substrate is provided between the plurality of ink supply openings, and the substrate temperature detecting element is arranged on the beam.

Inventors: Oohashi; Ryoji (Yokohama, JP), Imanaka; Yoshiyuki (Kawasaki, JP), Omata; Koichi (Kawasaki, JP), Tamura; Hideo (Kawasaki, JP), Yamaguchi; Takaaki (Yokohama, JP), Kubo; Kousuke (Yokohama, JP), Tamaru; Yuuji (Yokohama, JP), Takimoto; Masafumi (Tokyo, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: B41J 2/05 (20060101)

Expiration Date: 2020-12-06 0:00:00