Patents Assigned to Telex Communications
  • Patent number: 4944578
    Abstract: A display including a liquid crystal cell. The cell includes a liquid crystal material, a plurality of electrodes, and first and second polarizers. The first polarizer is located at a viewing side of the cell such that the vibration direction of light polarized thereby is non-parallel to the optic axis of the liquid crystal material as its front boundary layer. The second polarizer is located on a side of the cell remote from the first polarizer wherein the vibration direrction of light polarized thereby forms an angle with respect to the vibration direction of light polarized by the first polarizer. The liquid crystal is responsive to different magnitudes of the electric field for the display of perceived color differences.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: July 31, 1990
    Assignee: Telex Communications
    Inventor: William W. Denison