Patents Assigned to Crystalens Limited
  • Method of controlling liquid crystal lens in solar powered spectacles using light sensors
    Patent number: 6501443
    Abstract: In a pair of spectacles using liquid crystal lenses, an electrical circuit, for controlling the optical transmission of the liquid crystal lenses, controls the amplitude and/or duty cycle of the voltage driving the lens so as to operate the liquid crystal lens in the transition region, between maximum and minimum optical densities.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: December 31, 2002
    Assignee: Crystalens Limited
    Inventor: Richard Anthony McMahon