history-computer.com
LED is an innovative lighting technology that has been around since the late 19th century. Engineers use physics to manipulate electron flow through semiconductor materials, creating reactions that produce photons, or light.
– The first LED to produce visible light was invented in 1962 by Nick Holonyak, an engineer for GE. – It is used for most flat-screen TVs, excluding plasma. – Unless you have a very old TV, your newer set is an LCD TV with LED lighting.
UHD is an umbrella term used to standardize the specification requirements of regulatory bodies by way of aspect ratio and screen resolution. When a manufacturer says UHD, then the consumer can be sure that it meets certain requirements for these features.
– To qualify as UHD, screens must have a resolution of 3840 x 2160 pixels and a contrast ratio of 16:9. – UHD is the natural successor to HDTV. – Depending on resolution, UHD can be 20 times better quality than HD.