Patents by Inventor Beth L. Ellis

Beth L. Ellis 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).

  • Chevron-free FLC device
    Patent number: 7379144
    Abstract: An optical device includes a ferroelectric liquid crystal material. This optical device has a first and a second substrate. A first alignment treatment is applied to a surface of the first substrate, the first alignment treatment being intended to induce an orientation of at least a portion of the ferroelectric liquid crystal material along a first alignment direction with a first pretilt angle ?1 with respect to a plane parallel to the first substrate. A second alignment treatment is applied to a surface of the second substrate, the second alignment treatment being intended to induce an orientation of at least another portion of the ferroelectric liquid crystal material along a second alignment direction with a second pretilt angle ?2 with respect to a plane parallel to the second substrate.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: May 27, 2008
    Assignee: Displaytech, Inc.
    Inventors: Jiuzhi Xue, Beth L. Ellis, Stephen H. Perlmutter, Charles Crandall