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2. Light-emitting diode physics - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode_physics

   A LED is a long-lived light source, but certain mechanisms can cause slow loss of efficiency of the device or sudden failure. The wavelength of the light emitted is a function of the band gap of the semiconductor material used; materials such as gallium arsenide , and others , with various trace doping elements , are used to produce different ...

3. LED display - Wikipedia

   en.wikipedia.org/wiki/LED_display

   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.

4. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   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, ...

5. Comparison of CRT, LCD, plasma, and OLED displays - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_CRT,_LCD...

   Can have poor brightness, especially when most of the picture is white [5] Electro-magnetic radiation emission Can emit a small amount of X-ray radiation. Only emits non-ionizing radiation. [39] Emits strong radio frequency electromagnetic radiation [40] None, although control circuitry may emit radio interference Size Up to 43 in (1.1 m) [41]

6. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...

7. LED printer - Wikipedia

   en.wikipedia.org/wiki/LED_printer

   Kodak LED printer Oki LED printhead. An LED printer is a type of computer printer similar to a laser printer. Such a printer uses a light-emitting diode (LED) array as a light source in the printhead instead of the laser used in laser printers and, more generally, in the xerography process. The LED bar pulse-flashes across the entire page width ...