LCD color when it is tilted Why change

LCD diagonally on the time to see why the color change?
This shows that the display is good or bad?
Some liquid crystal display diagonally on the color will not see a time when this is why?

The best in-depth point

liquid crystal display itself is the way.It is the use of liquid crystal display elements, and the liquid crystal molecules with Light of the opposite sex, so you in a different point of view on some different.Of course it is not broken.Liquid crystal display on the way, there is the point of view, CRT monitors have no problem