Patents by Inventor T. Asada

T. Asada 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 optical shutter
    Patent number: 5455083
    Abstract: A liquid crystal optical shutter is disclosed.The liquid crystal optical shutter comprises two sheets of transparent, conductive substrates; a light-adjusting layer supported between the sheets, which comprises a transparent, thin film of polymer prepared by photopolymerizing prepolymers containing approximately 20 to approximately 60% by weight of urethaneacrylate; and a liquid crystal component selected from the group consisting of a cholesteric liquid crystal, a chiral smectic liquid crystal and the mixture thereof, said liquid crystal being encapsulated within said thin film.Superior in operating voltage, transmissivity and response time, the liquid crystal optical shutter is characterized by specifying a concentration range of the nematic liquid crystal, the base liquid crystal and introducing a flexible polytetramethylene chain with intermediate sizes into the polymer.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: October 3, 1995
    Assignee: Samsung Electron Devices Co., Ltd.
    Inventors: Chang H. Noh, T. Asada