It’s a Liquid Crystal Display screen.
Liquid crystals are substances made of oily, rod-shaped molecules that can flow like an ordinary fluid but otherwise contain their own rigid structure. The most important characteristic of liquid crystal displays (LCDs) is that whereas other display devices emit light to illuminate the objects they present, an LCD relies on controlled transmission or reflection of ambient light. This design allows for much higher efficiency and contrasts than regular displays; they’re also more versatile since they can be read in direct sunlight without washing out. They also don’t “ghost” images like LEDs or projectors often do with static images too, which makes them great for presentations.