Camera to the computer monitor when there will be a black stripe

Using mobile phones to take pictures of computer, why would not find some black stripes, and some will.

Geyuan point You are not a crt to display your pictures.Crt monitor the general and his entourage are his scan, just scan quickly, there are visual temporary stay naked eye can not see, an instant camera exposure can be seen, of course, you can set the computer graphics Increase the frequency that the camera exposure time to tune a little bit longer, there will be a black pattern.You have to the liquid crystal display of photographs certainly do not streak.Camera and video camera and monitor refresh rate there is a problem, as shown below Uninterrupted be fine, they will Shangyan, then you will see a blank, that is, stripes.

TV and computer screen (non-LCD) is the electron-beam images on the screen Zhen Zhen the last one out of the scan, but his speed is faster because the effect of delaying human eye can not detect, so our eyes look is a complete picture.
Camera's lens is also slow down effect, because His speed is relatively slow, so you will see one of a

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And Human eye is because of the effect of delaying, for example, you look at the sun, and then close your eyes, MA, there will be a little residue.Watching TV, in the eyes of people have not had time to find pictures were removed, there have been new Instead of a picture, so do not feel.