Mobile phone screens have progressed dramatically over the last few years. The following is a brief description of some of the widely used types of mobile screens.

• TFT LCD stands for Thin Film Transistor Liquid Crystal Display and is the most common type of screen found in mobile phones. These screens have a light underneath them that shines through the pixels to make them visible.
• AMOLED stands for Active-Matrix Organic Light-Emitting Diode; this is a technology based on organic compounds and known for its best image quality while consuming low power. Unlike LCD screens, AMOLED displays don't need a backlight—each pixel produces its own light—so phones using them can potentially be thinner.

These are described at http://www.in.techradar.com/news/phone-and-communications/mobile-phones/Best-phone-screen-display-tech-explained/articleshow/38997644.cms.