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    • 10. 发明授权
    • CRT picture display apparatus
    • CRT图像显示装置
    • US4638308A
    • 1987-01-20
    • US654390
    • 1984-09-26
    • Hiroshi KuwabaraJushi IdeYasuji KamataKenkichi Yamashita
    • Hiroshi KuwabaraJushi IdeYasuji KamataKenkichi Yamashita
    • H04N3/00G09G1/04G09G1/16H03K4/02H03K4/06G09G1/08
    • H03K4/06G09G1/04H03K4/026
    • A CRT picture display apparatus of the raster scan type comprises a cathode ray tube for raster scanning, a horizontal deflection circuit for supplying a horizontal deflection current to a horizontal deflection coil of the CRT, a vertical deflection circuit for supplying a vertical deflection current to a vertical deflection coil of the CRT, and a display data generator for supplying data to be displayed to the CRT. The horizontal deflection circuit produces as the horizontal deflection current a triangular current having one period which is twice a horizontal scanning period, and the triangular current has a first portion which increases in response to a horizontal sync signal at a predetermined inclination and a second portion which decreases in response to the next horizontal sync signal at the predetermined inclination and continues until the further next horizontal sync signal, whereby the period for a scanning line to proceed from lefthand end to righthand end of a raster on a screen of the CRT is made substantially equal to the period for the next scanning line to proceed from righthand end to lefthand end, and data is displayed during both the periods.
    • 光栅扫描型的CRT图像显示装置包括用于光栅扫描的阴极射线管,用于向CRT的水平偏转线圈提供水平偏转电流的水平偏转电路,用于向垂直偏转电流提供垂直偏转电流的垂直偏转电路 CRT的垂直偏转线圈和用于提供要显示给CRT的数据的显示数据发生器。 水平偏转电路作为水平偏转电流产生具有水平扫描周期的两倍的一个周期的三角形电流,并且三角形电流具有响应于预定倾斜度的水平同步信号而增加的第一部分和第二部分, 以预定的倾斜度响应于下一个水平同步信号而减小并且持续到下一个下一个水平同步信号,由此基本上使扫描线从CRT的屏幕上的光栅的左端到右端进行的周期 等于下一个扫描线从右端到左端的时间段,并在两个时间段内显示数据。