Patents by Inventor Deng K. Yang

Deng K. Yang 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).

  • Grey scale liquid crystal material
    Patent number: 5384067
    Abstract: A method of selectively adjusting the intensity of reflection to obtain stable grey scale reflectance of colored light from a light modulating chiral nematic liquid crystal material is disclosed. The method comprises subjecting the material to an electric field pulse of sufficient duration and voltage to cause a first proportion of the chiral nematic material to exhibit a first optical state and a second proportion of the chiral nematic material to exhibit a second optical state, whereby the material will continuously reflect a selected intensity between a maximum and minimum that is proportional to the amount of the material in the first optical state.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: January 24, 1995
    Assignee: Kent State University
    Inventors: J. William Doane, Deng K. Yang