Matrix addressable array for digital xerography

Incremental printing of symbolic information – Electric marking apparatus or processes – Electrostatic

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347112, B41J 239, B41J 2395

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active

061009091

ABSTRACT:
An apparatus for forming an image comprising a substrate with a plurality of high voltage transistors on the substrate. The transistors include a source electrode, a drain electrode and a gate electrode. Each transistor switches a marking potential of several hundred volts between the source and drain by a gate potential of at least an order of magnitude lower than the source to drain potential. There are a plurality of high voltage capacitors on the substrate. One of each capacitor is connected to one of the drain electrodes and each capacitor stores a charge potential approximately equal to the marking potential. The charge potential on each capacitor controls the forming of the image. A first data input on the substrate selectively loads a gate potential on gate the electrodes. A second data input located on the periphery of the substrate selectively loads a source potential on the source electrodes. The high voltage capacitors, the high voltage transistors, and the first data input are thin film elements integrally formed on the substrate.

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W.E. Haas, D.G. Parker and H.M. Stark, Highlight Color Printing: The Start of a New Machine, vol. 36, No. 4, Jul./Aug. 1992, pp. 366-372.
Russel A. Martin, Victor M. Da Costa, Michael Hack and John G. Shaw, High-Voltage Amorphous Silicon Thin-Film Transistors, IEEE Transactions on Electron Devices, vol. 40, No. 3, Mar. 1993, pp. 634-644.
Patrick A. O'Connell, Richard Gable and Clifford Brown, Amorphous Silicon Technology--Bringing a New Level of Integration and Image Quality to Electrostatic Printing, pp. 1-4.

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