Patents by Inventor Larry W. Eichman

Larry W. Eichman 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).

  • Plasma display with direct transformer drive apparatus
    Patent number: 4347509
    Abstract: A system for driving a plasma display panel is disclosed in which a transformer operated at a system clock frequency supplies voltage pulses to both the electrodes in the cells of the display device. Switching members operated by control signals generated by a control member select the cells to be discharged. A circuit for regulating the transformer output voltage in accordance with the number of cells discharged is also disclosed.
    Type: Grant
    Filed: February 27, 1980
    Date of Patent: August 31, 1982
    Assignee: NCR Corporation
    Inventors: Jay B. Hardway, Larry W. Eichman