Printhead board, printhead, and printing apparatus

Patent metadata

Field	Value
Publication number	US-9308719-B2
Application number	US-201414193257-A
Country	US
Kind code	B2
Filing date	Feb 28, 2014
Priority date	Mar 1, 2013
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A board for a printhead mountable on a printing apparatus includes three terminals used for connection to the printing apparatus, a printing element, a driving circuit connected to the first terminal, an inspection circuit connected between the first terminal and the second terminal, and a resistance element connected between the second terminal and the third terminal. When an inspection signal is supplied from the printing apparatus to the first terminal, the inspection circuit outputs an output signal according to the inspection signal. When a control signal for performing printing is supplied from the printing apparatus to the first terminal, the driving circuit drives the printing element according to the control signal, and the inspection circuit sets the inspection circuit and the second terminal in an open state with each other.

First claim

What is claimed is:

1. A board for a printhead mountable on a printing apparatus, comprising:
a first terminal, a second terminal, and a third terminal, which are used for connection to the printing apparatus;
a printing element configured to discharge a liquid;
a driving circuit connected to said first terminal;
an inspection circuit having an input node connected to said first terminal and an output node connected to said second terminal; and
a resistance element having…

Assignees

• Canon Kk

Inventors

• Kameyama Hiroaki
• Ohmura Masanobu

Classifications

• B41J2/0451 Primary

  Operations & Transport · mapped topic

• B41J2/04581

  Operations & Transport · mapped topic

• B41J2/04565

  Operations & Transport · mapped topic

• B41J2/0458

  Operations & Transport · mapped topic

• B41J2/04541 Primary

  Operations & Transport · mapped topic