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工作原理美国陆军电子研究与发展部研制的新型高对比度双基色彩色显象管,近来在荧光屏制造上又有较大的突破。现在流行的彩色显象管,由于荫罩的存在,使亮度与分辨率均受到了限制。另外,由于荧光粉层反射率高,所以现在流行的这种彩色显象管不能在白天的光照环境中使用。在新型高对比度双基色彩色显象管中,新式荧光屏的结构如图1所示,在两层透明的荧光粉层的后面还有一层黑色的吸光层,以削弱散射光的反射作用,电子束需透过这层不透明的吸光层后才进入荧光粉层。当电子束的能量低于10千伏时,红色荧光粉吸收其大部份能
Working principle The United States Army Electronics Research and Development Department developed a new high-contrast dual-color color display tube, fluorescent screen in the recent manufacturing have a greater breakthrough. Now popular color picture tube, due to the presence of shadow mask, brightness and resolution are limited. In addition, because of the high reflectivity of the phosphor layer, the currently popular color picture tube can not be used in the daylight illumination environment. In the new high-contrast dual-color display tube, the new fluorescent screen structure shown in Figure 1, the two transparent phosphor layer behind a layer of black light-absorbing layer to weaken the reflection of scattered light, electron beam Need to penetrate this opaque layer before entering the phosphor layer. When the electron beam energy is below 10 kV, the red phosphor absorbs most of its energy