About LCD (Liquid Crystal Display)
Liquid crystal display is the most widely used display type among cell phones because of its low power use and great picture quality. They are commonly simple to read, even under direct daylight.
LCDs are available to display arbitrary pictures or fixed pictures with low information content, which can be shown or hidden, for example, preset words, digits, and seven-segment displays, as in a computerized clock. They utilize a same technology, however arbitrary images are comprised of small pixels, while different displays have more elements.