The e-paper based e-book reader is a very lightweight tablet reader, equivalent to a thin paperback book, which can store about 200 e-books. It has the characteristics of light weight, large capacity, long battery life, large screen, etc. It is a new choice for office paperless. Some e-book readers have the ability to adjust font size, and can display black and white images in JPEG and GIF formats, Word files, and RSS news feeds. E-paper displays achieve visual effects by reflecting ambient light, so they look more like regular paper. This type of display is very energy efficient, because once the display is turned on, it no longer needs current to maintain the display of text, and only consumes energy when turning pages.