Patents by Inventor John VanDerploeg

John VanDerploeg 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).

  • LCD with a pair of retardation films on one side of normally white liquid crystal layer
    Patent number: 5594568
    Abstract: A normally white twisted nematic liquid crystal display is disclosed having a pair of retardation films disposed between the liquid crystal layer and an adjacent polarizer, both retardation films being on one side of the liquid crystal layer. Both retardation films, if uniaxial, have retardation values of from about 100-200 nm. Optionally, biaxial retarders (n.sub.X >n.sub.Y >n.sub.Z) may be used, such biaxial retarders having retardation values from about .DELTA..sub.ZX =-100 to -200 nm, and .DELTA..sub.ZY =-10 to -100 nm. Accordingly, inversion is reduced and contrast rations are improved at large viewing angles.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: January 14, 1997
    Assignee: OIS Optical Imaging Systems, Inc.
    Inventors: Adiel Abileah, John VanDerploeg, Gang Xu