Patents by Inventor Paulus A. Breddels

Paulus A. Breddels 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 crystalline color display cell having a phosphorescent substrate and U.V.-absorbing dichroic dye
    Patent number: 4830469
    Abstract: A liquid crystalline color display cell comprises two transparent, parallel substrate plates, 1, 2 (FIG. 1), a seal 3 and a liquid crystalline cell medium 5 which is present between the plates and the ring. The cell medium contains a dichroic, UV light-absorbing substance. Both substrate plates are provided with electrodes 6, 7 and the substrate plate are provided on the viewing side with a layer 9 of phosphors which emit colored light under the influence of UV light.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: May 16, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Paulus A. Breddels, Hendrik A. Van Sprang