Patents by Inventor Vladimir F. Drobny

Vladimir F. Drobny has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • LCDs (Liquid crystal displays) controlled by thin film diode switches
    Patent number: 4223308
    Abstract: A matrix multiplexed display cell has thin film switch devices at matrix crosspoints to provide a turn-on threshold for the electro-optic liquid used in the cell. Each of the switch devices is a back-to-back pair of diodes. The cell is operated at low current so that the switch devices, which are deposited on glass, do not degrade rapidly in use.
    Type: Grant
    Filed: July 25, 1979
    Date of Patent: September 16, 1980
    Assignee: Northern Telecom Limited
    Inventors: David R. Baraff, Nur M. Serinken, Carla J. Miner, Richard W. Streater, Vladimir F. Drobny