Lightemitting diode Wikipedia ~ A lightemitting diode LED is a semiconductor light source that emits light when current flows through it Electrons in the semiconductor recombine with electron holes releasing energy in the form of color of the light corresponding to the energy of the photons is determined by the energy required for electrons to cross the band gap of the semiconductor

LED lamp Wikipedia ~ An LED lamp or LED light bulb is an electric light for use in light fixtures that produces light using one or more lightemitting diodes LEDs LED lamps have a lifespan many times longer than equivalent incandescent lamps and are significantly more efficient than most fluorescent lamps with some LED chips able to emit up to 303 lumens per watt as claimed by Cree and some other LED

LED display Wikipedia ~ A LED display is a flat panel display that uses an array of lightemitting diodes as pixels for a video brightness allows them to be used outdoors where they are visible in the sun for store signs and recent years they have also become commonly used in destination signs on public transport vehicles as well as variablemessage signs on highways

LED printer Wikipedia ~ An LED printer is a type of computer printer similar to a laser a printer uses a lightemitting 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 pulseflashes across the entire page width and creates the image on the print drum or belt as it moves past

Pulkovo Airport Wikipedia ~ In January 1931 construction of an aerodrome near Leningrad Saint Petersburgs official name between 1924 and 1991 and the source of the airfields IATA code of LED commenced and was completed on June 24 1932 with the first aircraft arriving at 1731 that day after a twoandahalf hour flight from Moscow carrying passengers and mail

Led Zeppelin Wikipedia ~ Led Zeppelin were an English rock band formed in London in 1968 The group consisted of vocalist Robert Plant guitarist Jimmy Page bassistkeyboardist John Paul Jones and drummer John their heavy guitardriven sound Led Zeppelin are regularly cited as one of the progenitors of heavy metal although their style drew from a variety of influences including blues and folk music

Led Zeppelin discography Wikipedia ~ Led Zeppelin III 1970 was a softer more folkbased effort compared to the hard rock of the bands previous releases It also peaked at number one in the UK and in the US Led Zeppelins untitled fourth album often called Led Zeppelin IV and released on 8 November 1971

LEDbacklit LCD Wikipedia ~ A LEDbacklit LCD is a flat panel display that uses LED backlighting instead of cold cathode fluorescent CCFL backlighting LEDbacklit displays use the same TFT LCD thinfilmtransistor liquidcrystal display technologies as CCFLbacklit displays but offer reduced energy consumption better contrast and brightness greater color range using more expensive RGB LEDs blue LEDs with RG

OLED Wikipedia ~ An organic lightemitting diode OLED or Organic LED also known as an organic EL organic electroluminescent diode is a lightemitting diode LED in which the emissive electroluminescent layer is a film of organic compound that emits light in response to an electric current This organic layer is situated between two electrodes typically at least one of these electrodes is transparent

Quantum dot display Wikipedia ~ Moreover QDLED offer high color purity and durability combined with the efficiency flexibility and low processing cost of comparable organic lightemitting devices QDLED structure can be tuned over the entire visible wavelength range from 460 nm blue to 650 nm red the human eye can detect light from 380 to 750 nm