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首页> 外文期刊>Philips Journal of Research >PHOSPHOR SCREFNS FOR FLAT CATHODE RAY TUBES
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PHOSPHOR SCREFNS FOR FLAT CATHODE RAY TUBES

机译：阴极射线管的磷筛

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摘要

Various consequences for low-voltage excitation of colour phosphor screens, as required in flat cathode-ray tubes, have been described. A decreasing anode voltage results in a reduction of the number of luminescence centres available for excitation and in a non-radiative decay of excited charge carriers at the phosphor surface. The latter etfect is a consequence of the physical nature of surfaces and is found to amount to less than about 50% phosphor efficiency decrease for conventionally prepared phosphor materials. Additionally, the phosphor efficiency at low anode voltages is reduced by inorganic materials on the phosphor, usually technologically required for phosphor screen production, or resulting from tube manufacturing processes. The decreasing number of luminescent centres available for excitation at decreasing anode voltages results in severe phosphor efficiency saturation at energy densities required for high screen luminance comparable to conventional cathode ray tubes. Efficiency saturation under pulse-width modulation has been measured and described by the activator ground-state depletion model which has been employed for the deduction of material-related saturation parameters. It is used to predict the luminance performance at different anode voltages and excitation conditions. Phosphor saturation is one relevant selection criterion for phosphor materials.
机译：已经描述了扁平阴极射线管所需的彩色磷光屏的低压激励的各种结果。降低的阳极电压会导致可用于激发的发光中心数量减少，并导致磷光体表面的激发电荷载流子发生非辐射衰减。后一种效应是表面物理性质的结果，并且发现对于常规制备的磷光体材料，磷光体效率降低小于约50％。另外，磷光体上的无机材料降低了低阳极电压下的磷光体效率，这通常是磷光屏生产所需要的技术，或者是由管制造工艺产生的。在降低的阳极电压下可用于激发的发光中心数量的减少导致在高荧光屏亮度所需要的能量密度下，荧光粉效率严重饱和，可与传统的阴极射线管相比。脉冲宽度调制下的效率饱和已通过活化剂基态耗尽模型进行了测量和描述，该模型已用于推导与材料相关的饱和参数。它用于预测不同阳极电压和激发条件下的亮度性能。磷光体饱和度是磷光体材料的一种相关选择标准。

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