Find one that suits you by browsing a variety of the best back cover laptops on Laptopfrog.com! An enclosure for screens A protective cover known as an LCD top cover is made to fit over a device’s screen and back, such as a smartphone or tablet. A cover for the screen and a cover for the device’s back are its two main components. The screen cover is intended to shield the LCD (liquid crystal display) from dings, cracks, and other sorts of wear and tear that can happen with regular use.