双束投影管测试台中动态聚焦电路的研制

Design of Dynamic Focusing Circuit for Testing System of Projection Cathode Ray Tube with Double Beams

动态聚焦技术是为了改善显象管或投影管的边缘聚焦质量 ,动态的对屏幕中央及四周的聚焦差异进行补偿 ,从而达到提高整体分辨率的目的。作者针对双束投影管测试台的要求 ,设计了其中的动态聚焦电路。通过实验对比表明 ,用合适的聚焦电压 。

A novel type of dynamic focusing circuit has been developed for the testing system of the projection cathode ray tube(CRT)with double electron beams.Dynamic focusing technology considerably improves fringe resolution of the CRT and compensates the difference between the focusing at the center and around the edges of the screen.The experimental results show that the CRT focusing characteristics can be significantly improved by optimizing the focusing voltage.