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    • 6. 发明授权
    • Projection type color television system
    • 投影式彩色电视系统
    • US4219843A
    • 1980-08-26
    • US887767
    • 1978-03-17
    • Yoshimasa Takahashi
    • Yoshimasa Takahashi
    • H04N9/31
    • H04N9/31
    • A projection type color television system of the present disclosure comprises three cathode ray tubes for projecting a color picture on a projecting screen. The three cathode ray tubes have phosphor screens for producing and projecting onto the projecting screen respective three primary colors of light beam containing an image information in the beam. These cathode ray tubes are positioned with their respective phosphor screens placed on a first imaginary plane parallel to the projecting screen and in alignment with each other along a first imaginary line parallel to a horizontal scanning direction of the light beam. Of these tubes, a cathode ray tube producing a color having the highest amount of brightness measured in lumen is positioned intermediately between the other cathode ray tubes. Color signals applied to the two cathode ray tubes positioned one on each side of the intermediate cathode ray tube are corrected in such a manner that the ratio of the brightness of the primary colors is maintained at a predetermined ratio.
    • 本公开的投影型彩色电视系统包括用于在投影屏幕上投影彩色图像的三个阴极射线管。 三个阴极射线管具有荧光屏,用于在投影屏幕上产生和投影相应的包含光束中的图像信息的三原色光束。 这些阴极射线管被定位成使它们各自的荧光屏放置在平行于投影屏幕的第一假想平面上并且沿着平行于光束的水平扫描方向的第一假想线相互对准。 在这些管中,产生具有在内腔中测量的最高亮度的颜色的阴极射线管位于其它阴极射线管之间。 施加到位于中间阴极射线管的每一侧的两个阴极射线管的颜色信号被校正为使原色的亮度比保持在预定的比率。