Hewlett-packard Development Company, L.P.

Napolean J Leoni

Omer Gila

Richard A Fotland

Eric G Hanson

Henryk Birecki

Paul H McClelland

Bill Holland

An ion writing system includes a writing unit and a calibration module. The writing unit includes an array of selectable electrode nozzles to direct ions onto passive e-paper to form a pattern of dots on the e-paper. The calibration module calibrates the writing unit for image optical intensity via information from a sensor.

ION writing calibration

A method for writing to an electronic imaging substrate includes passing an electronic imaging substrate in relation to a writing device to change a state of image cells within the electronic imaging substrate. The imaging substrate is placed close enough to the writing device to reduce a blooming effect to a predefined threshold level when changing a state of one of the image cells within the electronic imaging substrate.

Writing to an electronic imaging substate

An inkjet printing apparatus includes a media transport unit to transport a print media along a print media transport path, at least one printhead assembly including an inkjet printhead having a plurality of nozzles to print on a select portion of the print media, the inkjet printhead forming a print region adjacent to the nozzles in an area between the printhead assembly and a print portion of the print media transport path, and at least one of an electrostatic discharge unit to neutralize a resulting electrical charge on at least the select portion of the print media before the at least select portion of the print media enters the print region and a neutralization unit to neutralize an electric field in the print region.

Inkjet printing apparatus and method thereof

A print head includes a first electrode layer including a plurality of generator electrodes, a second electrode layer including a plurality of discharge electrodes, and an insulating layer disposed between the generator electrodes of the first electrode layer and the discharge electrodes of the second electrode layer. The discharge electrodes include at least one discharge aperture extending therethrough. Each discharge aperture has an undercut region defining a discharge surface spaced from and substantially parallel to an opposed surface of the insulating layer.

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Palo Alto, CA, United States of America

Napolean J Leoni