Element substrate, printhead, head cartridge, and printing...

Details Element substrate, printhead, head cartridge, and printing... Element substrate, printhead, head cartridge, and printing...

2007-11-29

2010-11-30

Nguyen, Lam S (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S005000, C347S012000

Reexamination Certificate

active

07841678

ABSTRACT:
This invention relates to an element substrate capable of confirming an electrical connection status before a printhead malfunctions. The element substrate is a substrate for a printhead, which is detachable from a printing apparatus and includes a plurality of printing elements, a logical circuit for controlling the printing elements, and a voltage application terminal for applying a driving voltage to drive the printing elements. The logical circuit is driven at a voltage lower than the driving voltage. The element substrate includes a connection status output circuit which outputs a signal reflecting the electrical connection status between the printhead and the printing apparatus on the basis of the driving voltage.

REFERENCES:
patent: 5114252 (1992-05-01), Tanuma et al.
patent: 5828386 (1998-10-01), Okada et al.
patent: 6224184 (2001-05-01), Imanaka et al.
patent: 6293655 (2001-09-01), Imanaka et al.
patent: 7309120 (2007-12-01), Hatsui et al.
patent: 2005/0285904 (2005-12-01), Toge et al.
patent: 2007/0002087 (2007-01-01), Matsui et al.
patent: 2007/0103501 (2007-05-01), Hatsui et al.

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