Liquid crystal projection display with complementary color dye added to longest wavelength imaging element
May 19, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of making color-neutral LCD indicators of low residual transmission Liquid crystal projector and method Colored encapsulated liquid crystal devices using imbibition of colored dyes and scanned multicolor displays Colored encapsulated liquid crystal apparatus using enhanced scattering Fluorescent colored encapsulated liquid crystal apparatus using enhanced scattering Liquid crystal color display and method Complementary color liquid display Liquid crystal motion picture projector with memory Active matrix reflective projection system Reflective image plane module InventorsAssigneeApplicationNo. 886003 filed on 05/19/1992US Classes:349/10, Wherein liquid crystal cells include microencapsulated or polymer dispersed liquid crystal349/50, Diode349/86, Microencapsulated or polymer dispersed liquid crystal349/165Pleochroic dyeExaminersPrimary: Sikes, William L.Assistant: Duong, Tai V. Attorney, Agent or FirmForeign Patent References
International ClassesG02F 001/133.3H04N 009/31 AbstractA liquid crystal projection display, having (a) a light source for producing light of at least two different primary colors; (b) an imaging element corresponding to each primary color light produced by the light source, each imaging element comprising plural pixel elements, each pixel element comprising liquid crystal composition dispersed in plural volumes in a containment medium and being independently addressable to primarily scatter light incident thereon in the absence of a sufficient electric field and to primarily transmit light incident thereon in the presence of a sufficient electric field; and (c) a lens for projecting light transmitted by each imaging element onto a screen; the liquid crystal composition in the pixel elements of the imaging element corresponding to the primary color light of longest wavelength including a pleochroic dye of a color complementary to the primary color light of longest wavelength, which pleochroic dye preferentially absorbs incident light which has not been scattered by the liquid crystal material in the absence of the sufficient electric field and transmits incident light in the presence of the sufficient electric field.Other References
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