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New Design for High Resolution and Color Printing Heads

IP.com Disclosure Number: IPCOM000050936D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Kightlinger, DA: AUTHOR [+4]

Abstract

Using unselected print elements as counter electrodes eliminates the need for a ground plane.

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New Design for High Resolution and Color Printing Heads

Using unselected print elements as counter electrodes eliminates the need for a ground plane.

The printing module 1 is made up of an array or matrix of print elements 2 (Fig. 1) which are exactly similar to each other and of the same dimensions, although during the printing operation the functional property of each element may be dynamically changed. The dimensions can be as small as 1-mil diameter per element on 3-mil centers.

Every print element 2 of the matrix can be addressed to be a print electrode, or, if unaddressed, will be a counter electrode. When an electrode is called to print, it is addressed, and those elements con-centrically surrounding the addressed pins are grounded and behave as counter electrodes. See Figs. 2A and 2B. The addressing is dynamically changed on each print cycle.

Printing can be effected by selecting four adjacent elements and addressing them with signals of differing voltage, or differing polarity. Following the same scheme of counter electrode, explained above, four dots will be involved on each color pel (picture element).

For high resolution printing the whole matrix can be moved around in an elliptical pattern and energized to obtain high density dots and maximum coverage.

The structures can be fabricated in different ways. They can be made by using glass nozzle arrays, on which the top of each nozzle or capillary is filled with a compound, such as RuO(2). Another method...