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一、汉字显示器方案选择 1.各种扫描方式的比较采用电子束管的汉字显示器可有三种类型,即直接观察式存储管显示器,向量工作方式的阴极射线管显示器和光栅扫描方式的阴极射线管显示器。第一种是采用特殊的存储管,图形信息只须一次加到存储管上便能保留下来,后二种则采用普通的阴极射线管,需要连续更新画面才能供观察之用。近年来计算机系统中的显示器已越来越多地采用光栅扫描方式的阴极射线管显示器,尤其是字符显示器,几乎都用光栅扫描方式,对汉字显示器来说,情况也是这样,因此下面仅就光栅扫描方式加以讨论。常规的光栅扫描方式即电视机的扫描方式,采用这种扫描方式,必须连续重现整个屏幕
First, the Chinese display program options 1. Comparison of various scanning methods Chinese characters using electron beam display can have three types, namely, direct observation of the storage tube display, vector work of the cathode ray tube display and raster scan of the cathode ray tube monitor. The first is to use a special storage tube, the graphics information is only one time added to the storage tube will be able to retain the latter two ordinary cathode ray tube, you need to continuously update the screen for observation purposes. In recent years, the displays in computer systems have increasingly adopted cathode ray tube displays of raster scanning, especially character displays. Almost all use raster scanning, which is the same for Chinese displays. Therefore, Scanned to be discussed. Conventional raster scanning that TV scanning method, the use of this scanning method, you must continuously reproduce the entire screen