Patents by Inventor Cheryl Sun

Cheryl Sun 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).

  • Method, materials and apparatus for driving gray-scale bistable cholesteric displays
    Patent number: 7696971
    Abstract: The invention provides a method for controlling the grey-scale modulation of a reflective bistable cholesteric display by applying selected sequences of high and low pulses to modulate the cholesteric domain size and helical axis orientation. Non-mesogenic dopants may also be added to reduce the drive voltage.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: April 13, 2010
    Assignees: The Hong Kong University of Science and Technology
    Inventors: Wing Chiu Yip, Hoi Sing Kwok, Cheryl Sun
  • Method, materials and apparatus for driving gray-scale bistabel cholesteric displays
    Publication number: 20030030612
    Abstract: The invention provides a method for controlling the grey-scale modulation of a reflective bistable cholesteric display by applying selected sequences of high and low pulses to modulate the cholesteric domain size and helical axis orientation. Non-mesogenic dopants may also be added to reduce the drive voltage.
    Type: Application
    Filed: May 10, 2002
    Publication date: February 13, 2003
    Inventors: Wing Chui Yip, Hoi Sing Kwok, Cheryl Sun