Patents by Inventor Meinolph Kaufman

Meinolph Kaufman 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 crystal display having degree of twist and thickness for improved multiplexing
    Patent number: 4697884
    Abstract: A liquid crystal display based on the bistability effect, wherein the distance between the support plates is smaller than 10 .mu.m and the total twist of the liquid crystal is between 180.degree. and 360.degree., preferably about 270.degree.. Over the entire viewing area of the display, randomly distributed spacers are provided. Because of these measures, the range of the bistable action is so narrowed that the display can be driven with operating voltages outside this range, using conventional multiplexing techniques. A high degree of multiplexing with short switching times and excellent contrast is obtained. The range of viewing angles is very large and independent of the direction of illumination.
    Type: Grant
    Filed: September 17, 1986
    Date of Patent: October 6, 1987
    Assignee: BBC Brown, Boveri & Company, Limited
    Inventors: Hermann Amstutz, Dieter Heimgartner, Meinolph Kaufman, Terry J. Scheffer