Strictly speaking, e-books are the use of "electronic paper" technology, only the use of similar technology to ensure that the screen is more similar to the effect of paper books, in order to ensure that the display does not consume electricity, only in the moment of turning the page only need electricity. In the past, electronic paper is black and white, those so-called color e-books are basically the use of special LCD screens, not only the display effect is not as good as electronic paper, but also can not provide lasting power, continuous reading for 8 hours is basically the limit.