现在大屏幕显示还没有象阴极射线管那样的简单办法。最近有一种方案是 偏转一条窄的光束,用象阴极射线管里的电子束扫描那样的方式,在屏上扫描。直到不久以前,这个方案还不能实现,因为没有足够的相干光源或照准的光源能聚焦成一个很小的点,用来作精细的扫描。 Now that big-screen displays have not been as simple as cathode ray tubes. A recent solution is to deflect a narrow beam of light and scan it on the screen in the same manner as electron beam scanning in a cathode ray tube. Until recently, this solution could not be achieved because there was not enough coherent light source or focused light source to focus on a small spot for fine scanning.