Television Screens Led LED TV is a type of TV that uses an LED as a backlight. 4K means the TV has a resolution of 3840x2160 pixels, which means there are 3840 columns and 2160 rows of pixels on each screen. Smart TVS have the ability to connect to the Internet and access various applications and online content via the web. Therefore, "LED TV 4K Smart "refers to a TV with LED backlight, 4K resolution, and smart features. This TV can provide higher picture quality details and sharper images, and can access various applications and online content via the Internet.