Patents by Inventor Jacobus J. M. J. DeKlerk

Jacobus J. M. J. DeKlerk 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).

  • Liquid crystal display for large time multiplexing factors
    Patent number: 4231035
    Abstract: A liquid crystal display screen of the twisted nematic type comprising a liquid crystal having a dielectric relaxation and a high dispersion of .epsilon..sub.11 is used in a display device with a dual-frequency control. This structure enables the implementation of matrix-multiplex display devices having large pluralities of lines which must be successively scanned.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: October 28, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Cornelis Z. van Doorn, Jacobus J. M. J. DeKlerk