Patents Assigned to StereoGraphics
  • Patent number: 4967268
    Abstract: A liquid crystal shutter system for selecting fields of a field-sequential image, by transmitting the field-sequential image, with a synchronization signal, to one or more remote liquid crystal cell shutter assemblies. Each shutter assembly transmits selected fields of the field-sequential image in response to a drive signal, and includes a drive circuit for receiving the synchronization signal and generating each drive signal in response to the synchronization signal so that each drive signal has transitions synchronized with image fields. The drive circuit is capable of rapidly processing short duration synchronization signals with very low power consumption. In one embodiment, two liquid crystal cell assemblies are mounted in an eyeglass frame and used as a wireless selection device for a field-sequential stereoscopic image.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: October 30, 1990
    Assignee: StereoGraphics
    Inventors: Lenny Lipton, Marvin Ackerman