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1. 发明授权

US4335380A Multi-beam raster scan display monitor 失效
标题翻译：多光束光栅扫描显示器
公开(公告)号：US4335380A
公开(公告)日：1982-06-15
申请号：US159570
申请日：1980-06-16
申请人： David Y. Wright
发明人： David Y. Wright
IPC分类号： G09G1/20 , H04N3/28
CPC分类号： H04N3/28 , G09G1/20
摘要： A vertically aligned array of electron scanning beams independently modulated by individual sources of video signals are employed to significantly increase display definition in conventional cathode ray tube type monitors. Precise vertical alignment of scanning spots produced by the beam array is achieved by synchronizing the relative timing of the video signals associated with each of the beams using delay circuits. Vertical spacing between the scanning spots produced by the beam array may be selectively adjusted by electrostatic deflection plates. Vertical alignment and vertical spacing of the scanning spots are respectively sensed though the provision of narrow, vertical and diagonal slits in the fluorescent coating of the CRT screen. A photodetector positioned at the rear of the screen produces output signals in accordance with light delivered through the slits as the scanning spots traverse the slits. The relative timing and magnitude of the timing signals are indicative of the vertical alignment and vertical spacing of the scanning spots. Character generation circuitry comprises a plurality of discrete matrix memories which are simultaneously addressed using the same character designation derived from a single refresh memory. Superimposed screen images may be created by using different data sources to modulate the scanning beams in order to generate differing picture fields, each corresponding to an image on the screen.
摘要翻译：采用独立调制的各种视频信号源的垂直排列的电子扫描光束阵列，以显着增加常规阴极射线管式监视器中的显示清晰度。通过使用延迟电路同步与每个光束相关联的视频信号的相对定时来实现由光束阵列产生的扫描点的精确垂直对准。可以通过静电偏转板选择性地调整由光束阵列产生的扫描点之间的垂直间隔。通过在CRT屏幕的荧光涂层中提供窄的，垂直的和对角的狭缝来分别检测扫描点的垂直取向和垂直间距。位于屏幕后部的光电检测器根据扫描点穿过狭缝通过狭缝传送的光产生输出信号。定时信号的相对定时和幅度表示扫描点的垂直对准和垂直间隔。字符生成电路包括使用从单个刷新存储器导出的相同字符名称同时寻址的多个离散矩阵存储器。可以通过使用不同的数据源来调制扫描光束来产生叠加的屏幕图像，以便生成不同的图像场，每个图像场对应于屏幕上的图像。

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