Patents Examined by Roy Trice
  • Patent number: 5327269
    Abstract: A fast switching liquid crystal device, a method for making such a device, and eyewear incorporating the device for use in a stereoscopic viewing system. The device achieves a fast response time and high contrast by increasing the twist of the nematic material to 270 degrees and orienting the tilt angle of the material to be consistent throughout the twist. The liquid crystal device is constructed to have two transparent, essentially parallel substrates which are spaced apart by a desired cell gap distance, and on which are deposited electrodes. The electrode surfaces are coated with a polymer material which is conditioned to provide a means of aligning the director axes of the liquid crystal material, and to maintain a desired tilt angle between the director axes and the electrode surfaces. A chiral dopant is added to the nematic liquid crystal material so that the pitch of the material is approximately twice the gap distance of the cell.
    Type: Grant
    Filed: May 13, 1992
    Date of Patent: July 5, 1994
    Assignee: Standish Industries, Inc.
    Inventors: Mary Tilton, Lenny Lipton