Light Emitting Diode Wikipedia The Free Encyclopedia

March 18, 2018

An organic light emitting diode oled or organic led also known as an organic el organic electroluminescent diode is a light emitting diode led in which the emissive electroluminescent layer is a film of organic compound that emits light in response to an electric current. The first practical led was invented by nick holonyak in 1962 while he was at general electric.

Light Wikipedia

File 2007 07 24 High Power Light Emitting Diodes Luxeon

Vacuum Tube Wikipedia

Pages in category light emitting diodes the following 41 pages are in this category out of 41 total.

Light emitting diode wikipedia the free encyclopedia. They are efficient most of the energy turns into light not heat. This list may not reflect recent changes. 1962 electronic symbol pin configuration anode and cathode from wikipedia the free encyclopedia a light emitting diode led pronounced l i di1 is a semiconductor light source.

Organic light emitting diode oled is a type of light emitting diode led. Light emitting diodes leds came into existence in 1962 and were primarily red in color for the first decade. A light emitting diode led is a semiconductor device that produces light from electricity.

A flexible organic light emitting diode foled is a type of organic light emitting diode oled incorporating a flexible plastic substrate on which the electroluminescent organic semiconductor is deposited. Typically at least one of these electrodes is transparent. Electrons in the semiconductor recombine with electron holes releasing energy in the form of photonsthe 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.

Leds last a long time and do not break easily compared to incandescent lightbulbs. This enables the device to be bent or rolled while still operating. This organic layer is situated between two electrodes.

Currently the focus of research in industrial and academic groups flexible oleds form one method of fabricating a. They can produce many different colors. Light emitting diode red green and blue leds of the 5mm type type passive optoelectronic working principle electroluminescence invented nick holonyak jr.

Oleds can be used to make displays that can bend. The value is different for other diode typesschottky diodes can be rated as low as 02 v germanium diodes 025 to 03 v and red or blue light emitting diodes leds can have values of 14 v and 40 v respectively. The part of the oled that creates light is made of a very thin layer of organic compounds.

The main use of oled technology is for flat panel displays for smartphones and other mobile devices where they are in some ways better than lcds. A light emitting diode led is a semiconductor light source that emits light when current flows through it.