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ELECTRONIC DRIVE SYSTEM FOR DIRECT ELECTROSTATIC PRINTING

IP.com Disclosure Number: IPCOM000026759D
Original Publication Date: 1993-Aug-31
Included in the Prior Art Database: 2004-Apr-06

Publishing Venue

Xerox Disclosure Journal

Abstract

Many printing systems print a single row of pixels at a time and require individual drive transistors of high voltage. This is typical of direct electrostatic printing and similar systems. One solution is to use thin film transistors instead of more conventional multiple drivers on a single Silicon chip. However, this has the disadvantages that the speed of TFTs is low and they have a yield problem in fabrication, because of the high voltage, making this solution difficult if not impossible. Although it is possible to affix Silicon driver chips to glass and wirebond them to the pixels, the types of available chips with a voltage rating above 100 volts are generally not conducive to run the capacitive loads of the pixels such as are found in direct electrostatic printing.