Light writing type projection display using polymer-dispersed liquid crystal and liquid crystal television set as image light source
July 19, 2011. 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 ReferencesHigh brightness full color image light valve projection system Liquid crystal fiber optics large screen display panel Image display apparatus of liquid crystal valve projection type Liquid crystal projector and method Image projector with liquid crystal light shutter Real time image subtraction with a single liquid crystal light valve Dual liquid crystal light valve based visible-to-infrared dynamic image converter system Incoherent image intensity normalization, contour enhancement, and pattern recognition system Remotely controllable real-time optical processor Liquid crystal optical device using U.V.-cured polymer dispersions and process for its production InventorAssigneeApplicationNo. 734309 filed on 07/19/1991US Classes:349/159, Fiberoptic faceplate348/751, Liquid crystal349/5, Projector including liquid crystal cell (s)349/10, Wherein liquid crystal cells include microencapsulated or polymer dispersed liquid crystal349/25, With photoconductive layer (e.g., spatial light modulator(SLMs))349/86, Microencapsulated or polymer dispersed liquid crystal349/137, Antireflection layer353/31, Multicolor picture353/34Plural projection paths with single light sourceExaminersPrimary: Sikes, William L.Assistant: Duong, Tai V. Attorney, Agent or FirmForeign Patent References
International ClassesG02F 001/133G02F 001/135 H04N 005/74 G09F 009/30 Foreign Application Priority Data1989-08-03 JPAbstractA light writing type projection display for inputting two-dimensional information such as images or data patterns into a spatial light modulator by using a write light beam, and displaying the information on a screen by using a display light beam. The projection display comprises a light write type spatial light modulator, and either a cathode ray tube or a liquid crystal television set. The modulator includes an antireflection film, a glass substrate, a transparent electrode, a liquid crystal composition, a dielectric mirror, a light absorption layer, a photoconductive layer, a transparent electrode and a fiber optic plate which are laminated in the recited sequence. The liquid crystal composition includes one of a nematic liquid crystals, cholesteric liquid crystals, and smectic liquid crystals combined with a resin matrix. The resin matrix has a refractive index equal to or approximately equal to the ordinary or extraordinary refractive index of the liquid crystals, or equal to or approximately equal to the refractive index of the randomly oriented liquid crystals. The liquid crystals are enclosed and scattered in the resin matrix, or the resin matrix is enclosed and scattered in the liquid crystals. The projected light beam is thrown on a screen by using a display beam light source and the projection optical system. Compared with the conventional displays, the display is superior in brightness, contrast ratio, spatial uniformity of the display image and response time. Analog motion images can be displayed by using a schlieren optical system.Other References
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