与电脑中的其它配件一样，几年来显示器也在不断更新换代。这一变化源于显示器的核心部件──显像管技术的不断发展。传统的球面显像管主要采用点状荫罩式（Ｓｈａｄａｗ Ｍａｓｋ），它在水平和垂直方向上都是弯曲的，因而图像非常容易失真；其后推出的柱面荫栅式显像管（如索 Like other accessories in the computer, the display has been constantly upgrading over the years. This change stems from the monitor’s core components ─ ─ CRT technology continues to evolve. The traditional spherical picture tube mainly adopts the Shadaw Mask, which is curved in the horizontal and vertical directions, so the picture is very easily distorted. The subsequent introduction of the cylindrical shadow cascade tube