Method and equipment for transmitting information to ink-jet printing head

Abstract

The present invention relates to an inkjet printing system that includes an inkjet printhead having a plurality of electrical contacts. The plurality of electrical contacts include address contacts and enable contacts for enabling drop generators and drive current contacts for providing drive current to enable drop generators for selectively ejecting ink therefrom. The printing system includes a printing device having a plurality of electrical contacts including address contacts, enable contacts and drive current contacts. The plurality of electrical contacts are configured to establish electrical contact with corresponding electrical contacts on the inkjet printhead upon insertion of the inkjet printhead into the printing device. The printing device provides periodic address signals and enable signals to the address and enable contacts one the printhead. In addition, the printing device selectively applies drive current to accomplish forming images on print media.

Description

technical field [0001] The present invention relates to inkjet printing apparatus, and more particularly to an inkjet printing apparatus including a printhead portion that receives ink droplet activation signals for selective ejection of ink. Background technique [0002] Inkjet printing systems frequently employ an inkjet printhead mounted to a carriage that moves back and forth across a print medium, such as paper. As the printhead moves across the print medium, a control unit selectively activates each of a plurality of drop generators in the printhead to launch or deposit ink drops onto the print medium to form images and text characters. Ink that replenishes the plurality of drop generators is provided by an ink supply onboard or remote from the printhead. [0003] Individual drop generators are selectively actuated by using an actuation signal provided to the printhead by the printing system. In the case of thermal inkjet printing, each drop generator is activated by...

AI Technical Summary

Problems solved by technology

Printheads formed using CMOS technology tend to be more expensive than those made using NMOS technology

The CMOS fabrication process is a more complex fabrication process than the NMOS fabrication process and requires more masking steps, which increases the cost of the printhead

In addition, the requirement for a constant power supply tends to increase the cost of printing devices that must supply a constant voltage to the printhead

Images