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目前台式电脑大都采用阴极射线管(CRT)显示器,按其分辨率可分为低、中、高三档。分辨率与扫描频率、显象管的阴罩点距、显示器的有效屏幕尺寸以及视频信号的通道带宽等有关,一般以电子束在荧光屏上水平和垂直扫描的有效线数来表示。扫描频率越高,单位时间内扫描的有效线数越多,则分辨率越高,显示的图象就越清晰。目前显示器的扫描频率(行频)达到电视机的2～10倍,并且尽可能采用逐行扫描,而不像电视机那样用隔行扫描。这是因为对显示器的画面质量要求比电视机高得多,显示器显示的内容都是相对静止的,要求人眼在近距离内感觉不到其象素的微小抖动。早期的
Currently most desktop computers using cathode ray tube (CRT) display, according to their resolution can be divided into low, medium and high three files. The resolution is related to the scan frequency, the shadow mask pitch of the picture tube, the effective screen size of the display, and the channel bandwidth of the video signal. It is usually expressed as the effective number of horizontal and vertical electron beam scans on the screen. The higher the scan frequency, the more effective lines scanned per unit of time, the higher the resolution, the clearer the displayed image. The current monitor scan frequency (line frequency) to 2 to 10 times the TV, and as far as possible the use of progressive scan, rather than the same as the TV interlacing. This is because the display screen quality requirements much higher than the TV, the display shows the contents are relatively static, requires the human eye can not feel the small jitter of its pixels at close range. Early