The acronym LED is short for a light emitting diode, it is basically a two lead semiconductor source of light. The p-n junction diode itself will emit light when it is activated by enough voltage that is applied to the leads. When this happens, the electrons will recombine with electron holes found within the device. This, in turn, will release energy in the form of photons. The results of the effect along with the color of the light are determined by the energy band gap found within the semiconductor.
Although a seemingly recent invention, LEDs have actually been around for nearly a century and first used practically in electronic components as early as 1962. LEDs are quite small, often less than a single millimeter, and how the components are integrated will be used to shape the pattern of radiation. The infrared LED is used quite frequently in remote control devices that consumer use to control all types of devices, although it is primarily associated with televisions.
Modern LEDs are available across the infrared, ultraviolet, and visible wavelengths and offer very high brightness capabilities. Over the decades, LEDs have slowly replaced incandescent bulbs for a variety of devices and became commonly used in 7-segment displays often found in digital clocks. Today, LEDs are found in a wide variety of devices that include the following;
- Aviation Lighting
- Auto Headlamps
- Camera Flashes
- General Lighting
- Traffic Signals, Lighted Wallpaper, and More
LEDs are still somewhat more expensive and need better heat management than fluorescent lamp sources of the same power output. However, they are far more durable and have greater flexibility when it comes to their uses.
Terms related to LED
- Full form of LED
- What does LED mean?
- Types of Leds
- What does led stand for in TV?
- What is Light Emitting Diode?