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什么是荧光粉的余辉时间?按我国电子工业部的定义是:“从荧光粉激励停止瞬时到亮度下降为激励停止瞬时亮度的百分之十所经过的时间,称10%余辉时间。”目前很多用户与显象管制造厂常用荧光粉的余辉时间作为长余辉显象管的一项重要技术指标。在生产与供货实践中,常感到显象管余辉特性的指标很难定,这是什么原因呢?我们先来分析黑白电视荧光粉y_(31),它的余辉时间是小于5毫秒。按我国现行电视制式,帧扫描周期为40毫秒;如考虑电子束隔行扫描的话,
What is the phosphor afterglow time? According to the definition of China’s Ministry of Electronics Industry is: “from the phosphor excitation to stop the instantaneous to the brightness of the incentive to stop the instantaneous brightness of ten percent of the elapsed time, said 10% afterglow time.” Currently Many users and the CRT factory commonly used phosphor afterglow time as long afterglow picture tube is an important technical indicators. In the production and delivery practices, often feel the characteristics of the indicator tube persistence is difficult to determine the indicators, which is why? We first analyze the black and white TV phosphor y_ (31), its afterglow time is less than 5 ms. According to the current television system in our country, the frame scanning period is 40 milliseconds; if we consider the electron beam interlacing,