Patents by Inventor James C. Beedy

James C. Beedy 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).

  • Inorganic thin film compensator for improved gray scale performance in twisted nematic liquid crystal displays and method of making
    Patent number: 5638197
    Abstract: An optical O-plate compensation device, in accordance with the invention, uses an inorganic thin film which is grown by physical vapor deposition at oblique incidence. The resulting thin film exhibits a biaxial form birefringence and performs, in a liquid crystal display (LCD), in a similar manner to uniaxial films with its extraordinary axis oriented obliquely at about 45.degree. with respect to the surface of the film. The invention makes possible a significant improvement in the gray scale properties and contrast ratios of liquid crystal displays (LCDs) over a wide range of viewing angles.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: June 10, 1997
    Assignee: Rockwell International Corp.
    Inventors: William J. Gunning, III, Bruce K. Winker, Donald B. Taber, Paul H. Kobrin, James C. Beedy, John P. Eblen, Jr.