CRT显示器件中超大角度偏转的理论研究

Theoretical Study of Ultra-Large-Angle Deflection in Cathode Ray Tube Display

CRT具有颜色逼真、分辨率高、技术成熟等优点,为了克服其体积大、笨重的不足,增加电子束偏转角度已经成为CRT的发展趋势。本文对超大偏转角的偏转线圈进行了理论研究,优化了线圈绕线分布和校正磁铁位置,减小光栅畸变和会聚误差。最后本文得到超大偏转线圈工作特性的理论极限。该研究结果可为超大偏转角CRT的研发提供理论指导。

A novel type of deflection coil, capable of deflecting electron beams up to an ultra large angle, say 135°, has been successfully developed with theoretical simulation. First, the topology of the coil and the position of the magnet are optimized. Next, the raster distortion and the convergence are reduced. Finally, the theoretical limit of the deflection coil is evaluated.