Method and system employing a push-pull liquid crystal modulator
November 25, 2007. 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 References 2099694 2417446 3256776 3858001 Liquid crystal stereoscopic viewer Stereoscopic television system Liquid crystal display with improved angle of view and response times Light modulator, demodulator and method of communication employing the same Stereoscopic television system Method and apparatus for converting phase-modulated light to amplitude-modulated light and communication method and apparatus employing the same InventorsAssigneeApplicationNo. 07/125402 filed on 11/25/1987US Classes:348/57, With alternating polarization348/51, Stereoscopic display device349/15, Stereoscopic349/77, With particular cooperation between cells (e.g., alternating selection or simultaneous selection of cells)349/98, Circular353/8, Polarizer359/465Using polarized lightExaminersPrimary: Britton, Howard W.Attorney, Agent or FirmInternational ClassesH04N 13/00 (20060101)G02F 1/13 (20060101) AbstractA system and method employing a push-pull modulator for stereoscopic image selection. The modulator includes a pair of surface mode liquid crystal cells having orthogonal rub axes, and a linear polarizer having absorption axis bisecting the orthogonal rub axes, and has high speed, good transmission, and symmetrical dynamic range characteristics. A field-sequential steroscopic video image may be transmitted from a video display screen (or video projector) through the modulator as the cells of the modulator are driven so that fields of alternately left-handed circularly polarized light and right-handed circularly polarized light will emerge. The transmitted circularly polarized light may be viewed using passive spectacles incorporating circular polarizing filters.Other References
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