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前言黑白显象管屏面要求光栅亮度均匀一致,如果平面中心区亮度明显低于边缘区亮度,则称为暗中心。暗中心是黑白显象管问世以来就存在的老问题,在不少文献中都论述过产生暗中心的原因,归纳起来有以下几种意见及看法:中心区荧光粉厚;中心区沉积钡消气剂膜;中心区有机膜薄;中心区铝膜氧化;中心区铝膜呈凹下型等。自我车间黑白显象管生产以来,暗中心一直是我车间的主要技术问题之一。该项废品波动较大,较长时间在1％～3％之间波动,有
Preface The black and white CRT screen requires uniform grating brightness, if the center of the plane brightness is significantly lower than the marginal zone brightness, is called the dark center. The dark center is an old problem that has existed since the advent of black and white picture tubes. In many literatures, the reasons for the dark center have been discussed. There are several opinions and opinions as follows: the thick phosphor in the center area; Membrane; central organic thin film; central area aluminum oxide; central area was concave and other aluminum film. The dark center has always been one of the main technical issues in my workshop since the self-workshop black and white picture tube production. The waste volatility, a long time between 1% ~ 3% fluctuations, there