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A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, ...
The cathode ray tube was the workhorse of text and video display technology for several decades until being displaced by plasma, liquid crystal , and solid-state devices such as thin-film transistors (TFTs), LEDs and OLEDs.
The most common symptom of LED failure is the gradual lowering of light output. Sudden failures, although rare, can also occur. Early red LEDs were notable for their short service life. With the development of high-power LEDs, the devices are subjected to higher junction temperatures and higher current densities than traditional devices. This ...
Detail view of an LED display with a matrix of red, green and blue diodes The 1,500-foot (460 m) long LED display on the Fremont Street Experience in Downtown Las Vegas, Nevada, is currently the largest in the world. A LED display is a flat panel display that uses an array of light-emitting diodes (LEDs) as pixels for a video display.
At the time, many considered creating a GaN LED too difficult to produce; therefore, Nakamura was fortunate that the founder of Nichia, Nobuo Ogawa (1912–2002), was willing to support and fund his GaN project. [11] [12] However, the senior Ogawa ceded the presidency to his son-in-law Eiji Ogawa (in 1989). The company under Eiji's direction ...
A 140 cm (56 in) DLP rear-projection TV Large-screen television technology (colloquially big-screen TV) developed rapidly in the late 1990s and 2000s.Prior to the development of thin-screen technologies, rear-projection television was standard for larger displays, and jumbotron, a non-projection video display technology, was used at stadiums and concerts.
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