what exactly do you mean by led ?

 

What is "led" mean? ?

A very basic introduction to the inner workings of a light-emitting diode.

In its most basic form, the most basic way to describe a diode that emits light ( led full form) is an electronic device that emits light when an electric charge passes through it. The light is produced when the electrons and particles that carry this charge (known as electrons and holes) are integrated into the semiconductor's material.

Since light is generated within the semiconductor , solid LEDs are often referred to as being in a solid state. They are also known as "solid-state lighting," that also includes organic LEDs (OLEDs) is what distinguishes this kind of light from other sources with glowing filaments heated (incandescent and Halogen lamps made of tungsten) and gas discharge (fluorescent lamp).

Different colors
Within the semiconductor materials used in the LED the electrons and holes are encased within energy band. The separation of the bands (i.e. that's the bandgap) is the measure of the intensity of the photosns (light particles) release out of the LED.

The photon's energy determines the wavelength of light that is emitted, and consequently, the hue. Different semiconductor materials with different bandgaps produce different shades of light. The wavelength (color) can be altered by altering how light is emitted, or active area.

LEDs are made up of compound semiconductors made up of elements that belong to the groups III and V of the periodic table (these are known as III-V compounds). The most popular III-V substances used to make LEDs are gallium arsenide (GaAs) and gallium Phosphide (GaP).

In the beginning of the 90s, LEDs were only available in a handful of colors , including commercial white and blue LEDs weren't available. In the 1990s, LEDs that were built on gallium-nitride (GaN) material system broadened the color spectrum and provided for a wide range of new possibilities.

Main LED materials
The most significant semiconductor materials that are utilized to make LEDs are:

• Indium Gallium Nitride (InGaN):blue, ultraviolet, and green high-brightness LEDs.
• Aluminum gallium Phosphide (AlGaInP):yellow, bright orange and red high-brightness LEDs
• Aluminum gallium arsenide (AlGaAs):red and infrared LEDs
• Gallium Phosphide (GaP):yellow and green LEDs

Learn About LED Lighting

• The Basics
  • What are LEDs and how do they work?
  • Lifetime of LED lighting products
  • Where to use LED Bulbs
  • LEDs and Heat
• How is LED lighting different?
• Which are main reasons to choose energy efficient STAR(r) certified LED bulbs?

The Basics of LED Lighting

What are LEDs and how do they work?

LEDstands for light emitting diode. LED lighting products emit light up to 90% more effectively than incandescent light bulbs. What's the reason for these lights? A current of electricity moves through the microchip. This creates small amounts of light. Also known as LEDs. They emit visible light. To prevent performance issues, the heat generated by LEDs is later absorbed by a heat sink.

Lifetime of LED Lighting Products

The time-to-life that LED light fixtures is different in comparison to different sources of light, such as incandescent light and CFL or CFL, or compact fluorescent lights (CFL). LEDs typically do not "burn out" or fail. Instead, they experience 'lumen depreciation' which means that the brightness of LEDs decreases slowly throughout the duration of. Contrary to the incandescent bulbs, LEDs "lifetime" is established on an estimation of the time when the brightness drops by 30 %.

How are LEDs Used in Lighting

LEDs are built into bulbs and fixtures to provide general lighting. Small in size, LEDs provide unique design opportunities. Certain types of LED bulbs could visually resemble conventional light bulbs , and could enhance the appearance of traditional lighting bulbs. Certain lighting fixtures made of LEDs could include LEDs that can be used as an endless light source. There are also hybrid lighting solutions that make use of an alternative "bulb" or replaceable light source that is specifically created to create a unique fixture. LEDs offer a great opportunity to create new lighting designs and are able to be utilized in a variety of ways than traditional lighting technologies.

LEDs and Heat

LEDs use heat sinks to absorb the heat produced by the LED and later disperse it into the surrounding environment. This stops LEDs from overheating and burning out. The control of heat is typically the most important aspect in the performance of LEDs throughout its lifespan. The higher the temperature at which LEDs work, the more the performance of the light will diminish and the shorter the LED will be.

LED bulbs employ a range of designs for heat sinks and designs to manage the heat. The latest advances in materials permit manufacturers to design LED bulb that have shapes similar to the dimensions and shapes of traditional incandescent bulbs. No matter the design of the heat sink, most LED bulbs that have been given the ENERGY STAR have been tested to ensure that they can control the heat so that the light output is sustained until the end of their lifespan.

Find out more information on it in this article. led full form