Patents by Inventor John C. Prince

John C. Prince has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5146355
    Abstract: A transflective liquid crystal display provides a high quality color image and efficient energy utilization. A layer of liquid cyrstal material is controlled by a transparent electrode matrix. A matrix of (primary color emitting) phosphors is aligned with a matrix of transparent electrodes for controlling the shuttering of the liquid crystal layer. A source of fluorescent energy excites the phosphors. A first dichroic filter and a second dichroic filter are located behind the liquid crystal layer. The first filter reflects untraviolet light and transmits visible light while the second filter transmits ultraviolet light and reflects visible light. The two filters are arrayed so that the phosphors are efficiently energized by the ultraviolet light source while ambient illumination is utilized, the display thereby providing both transmissive and reflective modes of operation.
    Type: Grant
    Filed: March 18, 1991
    Date of Patent: September 8, 1992
    Assignee: Litton Systems Canada Limited
    Inventors: John C. Prince, James F. Farrell
  • Patent number: 5019808
    Abstract: A liquid crystal display provides a high quality color image and efficient energy utilization. A layer of liquid crystal material is controlled by a transparent electrode matrix. A matrix of (primary color emitting) phosphors, each in alignment with a transparent electrode, is fixed to a surface of a fiber optic plate. A source of fluorescent energy excites the phosphors. A filter located behind the fiber optic plate reflects visible light, both ambient and that emitted from the phosphors. The fiber optic late acts as a relay lens and prevents cross pixel color contamination while the generation of backlight by the phosphor conversion of fluorescent to visible energy is a highly efficient process.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: May 28, 1991
    Assignee: Litton Systems Canada Limited
    Inventors: John C. Prince, James F. Farrell
  • Patent number: 4799050
    Abstract: A liquid crystal display provides a high quality color image and efficient energy utilization. A layer of liquid crystal material is controlled by a transparent electrode matrix that is fixed to one surface of a fiber optic plate. A matrix of (primary color emitting) phosphors, each in alignment with a transparent electrode, is fixed to the opposed surface of the plate. A source of fluorescent energy excites the phosphors. A filter located behind the fiber optic plate reflects visible light, both ambient and that emitted from the phosphors. The fiber optic plate acts as a relay lens and prevents cross pixel color contamination while the generation of backlight by the phosphor conversion of fluorescent to visible energy is a highly efficient process.
    Type: Grant
    Filed: October 23, 1986
    Date of Patent: January 17, 1989
    Assignee: Litton Systems Canada Limited
    Inventors: John C. Prince, James F. Farrell