Back light photosource each second glitters 40,000 times, the personeye cannot distinguish the frequency which this glitters, thus reducedthe eye strain, even if observed the very long time.

• 背光光源每秒闪烁4万次，人眼识别不出这个闪烁的频率，从而降低了眼睛疲劳，即使观察了很长时间。