Patents Assigned to Berg & Berg Enterprises, Inc.
  • Method and apparatus for increasing microdisplay black state in light management systems and flexibility to utilize polarized or unpolarized input light
    Patent number: 7280281
    Abstract: A dichroic is positioned to separate color beams of polarized input light. The color beams are directed to microdisplays that contain correspondingly colored content in a kernel of a Light Management System (LMS). Adjustment of a voltage amplitude of the microdisplays is set to produce a maximum black state of the LMS. In one embodiment, a passive nematic liquid crystal device is utilized as a quarter waveplate. A thickness of a liquid crystal layer (d) is matched to a birefringence (?n) of the nematic such that retardation d?n =ΒΌ?.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: October 9, 2007
    Assignee: Berg & Berg Enterprises, Inc.
    Inventor: Arthur Berman