推荐回答（5个）
从原理来说，LED背光的亮度反而比普通CCFL背光的低一些，所以搭配LED背光的液晶显示器通常都要采用增亮膜以弥补亮度的不足。
LED背光相对CCFL背光，优势在于：低能耗、背光均匀、光色纯、轻薄、寿命长、不易老化
CCFL背光的显示器，在使用长时间后，亮度会衰减，色温开始降低，这是“灯管”的通病，所以即使理论上CCFL的亮度要高，但使用时间长了以后也不见得会比LED的亮
需要主意的是，如果显示器开启了DCR（动态对比度）功能，那么在显示高光占多的画面时会自动提高亮度，以提升高光与暗部的比值，这时候看文档或网页的时候可能会非常的刺眼，所以一般建议关闭DCR功能，在玩游戏时选择游戏模式，在看文档时选择文档模式，在看电影时选择电影模式即可，这些模式的亮度都不一样，一适应不同画面的观看需求
最后，在使用电脑时建议保证房间环境的光线亮度，如果环境太暗，人眼瞳孔会放大，这时候看电视或看电脑都是非常刺眼的，非常伤眼睛，建议晚上熬夜时也要打开房间灯光，以保护眼睛
长时间对着这样的东西肯定都是对眼睛不好的，LED和LCD主要区别是背光源，即里面发光的东西，一个是LED灯，另一个灯管的，LED使用寿命长，LCD相对来说使用寿命一般要短些，而且用久了光线会发黄。
如果感觉眼睛难受的话将光源调暗点会好些
严格的说LED显示器是没有背光的，它是靠每个小二极管自发光的，因而如果屏幕上有一个黑点，那黑点处的LED是不发光的。而LCD显示器即使显示一张黑纸，也是需要背光全开。也是因为这个原因，LED比LCD要省电。
LED的PWM调光机制决定了它在低亮度时会闪烁，虽然闪烁频率人眼看不出来，但是用照相机这些去看是很明显的（论坛卖的那个面板，视频里灯亮度改变时出现的闪烁就是这个原因，那个闪烁频率可是120Hz哦）不过我是没有用过LED背光显示器，所以是否伤眼睛没体会了。。。
普通LED发出的都是蓝光，之所以发出白光是因为在LED上涂了一层黄荧光粉的缘故。荧光粉的质量如果太差，就会导致LED发出的蓝光过多，而世界公认过多蓝光会损伤眼底。现在已经发明出三基色LED灯珠，不过价格较贵，所以，从保护视力的角度讲，ccfl冷光灯依然有存在的必要，但是由于它需要高压条点亮，加上发热量过大，寿命短，最终还是要被三基色LED替代的。
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