What Does LEDs Stand for?

  Many of my friends do not know LED very much; maybe some of them even do not get what LED stands for. Now let us discuss it in this article.

  LED generally stands for light-emitting diode. It is basically a semiconductor mechanism which produces incoherent thin-spectrum light when electrically inclined in the forward direction. The color of the discharged light is usually based on the composition and the condition of the semi conducting substance applied, and can be infrared, visible or near-ultraviolet. In the year 1955 Rubin Braunstein of the Radio Corporation of America initially accounted on infrared release from gallium arsenide and various supplementary semiconductor alloys. Research conducted at the Texas Instruments, by Bob Biard and Gary Pittman, discovered in the year 1961 that the gallium arsenide emitted infrared radiance when electric current was applied.

  By the way, it is need to introduce the history of LED in my opinion. The first known report of a light-emitting solid-state diode was made in 1907 by the British experimenter H. J. Round. However, no practical use was made of the discovery for several decades. The first LEDs became commercially available in the 1970s, and were almost all red. They were commonly used as replacements for incandescent indicators, and in seven-segment displays, first in expensive equipment such as laboratory and electronics test equipment, then later in such appliances as TVs, radios, telephones, calculators, and even watches. These red LEDs were bright enough only for use as indicators, as the light output was not enough to illuminate an area. Later, other colors became widely available and also appeared in appliances and equipment. As the LED chemistry became more advanced, the light output was increased, and LEDs became bright enough to be used for illumination.

  Overall, all of us need to get ourselves more knowledge about LEDs. It is a tendency that LEDs will be popular and widely use.