Patents by Inventor William J. Leybold

William J. Leybold 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).

  • Patent number: 5640173
    Abstract: The invention identifies the cause of and solves so-called display pattern splicing in passive matrix displays implemented with Active Addressing.TM. techniques or other techniques that produce column signals having more than one magnitude. Splicing is an optical aberration that is manifested by a transient pixel rms voltage deviation from a current, frame-averaged value that occurs when one image changes to a new one. Active solutions to display pattern splicing apply a correction of some type to counteract the effects of the transient optical response. Preferred active solutions are premised on the observation that splicing is an effect common to all pixels on a column. One type of active solution includes different embodiments that entail determining the amplitude and character of the display pattern splice and introducing a compensating signal as a function of the amplitude and character of the splice to counteract it.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: June 17, 1997
    Assignee: In Focus Systems, Inc.
    Inventors: Dennis W. Prince, Benjamin R. Clifton, William J. Leybold