Patents by Inventor Stefan Borsig

Stefan Borsig 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).

  • Black-white liquid crystal display having an insulation layer for blocking the diffusion of sodium ions from the glass of the cell plate to the polyphenylene of the orientation layer
    Patent number: 5071228
    Abstract: A black-white liquid crystal display (10) contains a nematic liquid crystal with a twist of 270.degree. between cell plates. The product of the liquid crystal layer thickness and anisotropy of the refractive index is about 0.38. A pretilt of about 15.degree. is present. The polarization directions (P1, P2) have an angle .beta. of 45.degree. to the orientation directions (Mo, Mu). This display features a very wide viewing angle range with relatively little dependence of the contrast on the viewing angle and there is an almost complete absence of color shift depending on the viewing angle. Due to the significant enhancement in viewing angle range in relation to contrast and color neutrality compared with all known cells, the display is called "Extended Viewing Angle" display (EVA display). It has a very high multiplexability.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: December 10, 1991
    Assignee: Nokia Unterhaltungselektronik
    Inventors: Jurgen Waldmann, Stefan Borsig