Litton Systems Canada Limited

John C Prince

James F Farrell

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. The phosphor matrix is separated from the liquid crystal shutter layer by substantially less than the dot pitch of the phosphor matrix layer to maintain the requisite registration and minimize cross-contamination of colors.

Transflective mode liquid crystal display with phosphor illumination

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.

Full color liquid crystal display

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.

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Kettleby, Canada

John C Prince