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荧光屏是一些直视电真空器件的关键部分,它将信号转换为图象或将不可见图象转换为可见图象。无论示波管、指示管、黑白或彩色显象管,以及变象管、象增强管等器件,都需要通过荧光屏吸收电子动能,直接转换成可见光,把相应图象显示出来传送给观众。对荧光屏的基本要求是:(1)具有较高转换效率;(2)有分辨图象细节本领;(3)有适合人跟观察的光谱特性;(4)有合适余辉时间;(5)有高的稳定性和足够寿命。研究荧光屏的转换效率具有重要意义。高转换效率的电视显象管,收看图象悦目舒适,甚至可以在白天普通光照下收看。只要把器件屏幕亮度提高到150尼特以上,就可以实现这一目标。本文从荧光屏制作角度出发,对荧光屏转换效率作一讨论。
Fluorescent screens are a key part of some direct-view electrical vacuum devices that convert signals into images or convert invisible images into visible images. Both oscilloscopes, indicator tubes, black and white or color picture tubes, and picture tubes, such as enhancement tubes and other devices, need to absorb electronic kinetic energy through the fluorescent screen and directly convert them into visible light to display the corresponding images to the audience. The basic requirements for the phosphor screen are: (1) high conversion efficiency; (2) resolution of image detail; (3) spectral characteristics suitable for human observation; (4) suitable afterglow time; High stability and sufficient life expectancy. It is very important to study the conversion efficiency of the phosphor screen. High conversion efficiency of the TV picture tube, watching the picture pleasing to the eye, and even under normal daylight watching. As long as the device screen brightness increased to 150 nits above, you can achieve this goal. In this paper, from the perspective of screen production, conversion efficiency of the screen to make a discussion.