Patents by Inventor Stephen D. Turney

Stephen D. Turney 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).

  • Brightness control for a vacuum fluorescent display
    Patent number: 4495445
    Abstract: A vacuum fluorescent display is provided with control means for turning on the display elements by means of a control signal which is in phase with the AC voltage supplied to the cathode of the display. The control signal has a duty cycle which is symmetrical about the zero crossing points of the AC voltage. As a result, the display produces light output only during time periods that are symmetrical about the zero crossings of the AC voltage. In this manner, uniform brightness of the display is perceived.
    Type: Grant
    Filed: June 6, 1983
    Date of Patent: January 22, 1985
    Assignee: General Electric Company
    Inventor: Stephen D. Turney