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    • 2. 发明授权
    • Color CRT and production method therefor
    • 彩色CRT及其制造方法
    • US06630778B1
    • 2003-10-07
    • US09889413
    • 2001-07-17
    • Koji WashiyamaKeisuke IidaMasaaki Inamura
    • Koji WashiyamaKeisuke IidaMasaaki Inamura
    • H01J2910
    • H01J29/327H01J9/2278H01J29/185
    • A color cathode ray tube includes a transparent panel, a funnel joined airtightly to a circumference portion of a sidewall of the panel, a light absorption layer (black layer) and an optical filter layer both disposed on an interior surface of the transparent panel, and a phosphor layer formed thereon. A length from an edge of the panel joined to the funnel to a circumference edge of the light absorption layer formed on an interior surface of the sidewall of the panel is longer than or equal with that from the edge of the panel to a circumference edge of the optical filter layer formed similarly on an interior surface of the sidewall of the panel. The color cathode ray tube can be manufactured by making a length from an edge of the panel to a scraping edge of the light absorption layer in the trimming step of the light absorption layer longer than or equal with that from the edge of the panel to a scraping edge of the filter layer in the trimming step of the filter layer. Thus, black fragments occurring in trimming the optical filter layer can be prevented from adhering and remaining on the interior surface of the panel. Thereby, color cathode ray tubes without display defects can be realized.
    • 彩色阴极射线管包括透明面板,气密地连接到面板的侧壁的圆周部分的漏斗,设置在透明面板的内表面上的光吸收层(黑色层)和光学滤光层,以及 形成在其上的荧光体层。 从面板的边缘连接到漏斗的边缘到形成在面板的侧壁的内表面上的光吸收层的周边的长度大于或等于从面板的边缘到圆周边缘的长度 所述滤光层相似地形成在所述面板的侧壁的内表面上。 可以通过在光吸收层的修整步骤中从面板的边缘到光吸收层的刮擦边缘的长度大于或等于从面板的边缘到边缘的长度而制造彩色阴极射线管 在过滤层的修剪步骤中过滤层的刮擦边缘。 因此,可以防止在修整光学滤光层中出现的黑色碎片粘附并残留在面板的内表面上。 由此,可以实现没有显示缺陷的彩色阴极射线管。