Matrix addressable array for digital xerography
March 2, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod for two-color development of a xerographic charge pattern Image forming method and device for same Electrographic writing head Electrostatic image forming apparatus using field effect transistors Image-forming element for an electrostatic printer having electrodes in the form of a grid Electrostatic image output apparatus High voltage thin film transistor Image forming apparatus using an electrode matrix to form a latent image Patent #: 5640189 InventorsAssigneeApplicationNo. 032923 filed on 03/02/1998US Classes:347/141, Specific electrostatic head347/112ElectrostaticExaminersPrimary: Brase, Sandra L.Attorney, Agent or FirmInternational ClassesB41J 002/39B41J 002/395 AbstractAn 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.Other References
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