what exactly do you mean by led ?
What does "led" mean? ?
A basic understanding of the basic functions of a light-emitting diode.
In its simplest and 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 holes and electrons) are incorporated into the semiconductor's material.
Since light is generated within the semiconductors, they are often referred to as devices that are solid state. " Solid-state" is the term used to describe "solid-state lighting," that also includes organic LEDs (OLEDs) is what differentiates this kind of light from other sources which use glowing filaments heated (incandescent and Halogen lamps made of tungsten) as well as gas discharge (fluorescent lamp).
Different colors
Inside the semiconductor substance of the LED the electrons and holes are contained in energy bands. The separation of the bands (i.e. it is also known as the bandgap) determines the strength of photons (light particles) that are released out of the LED.
The energy of the photon determines the wavelength of light released and, therefore the hue. Different semiconductor materials with various bandgaps generate different shades of light. The wavelength (color) can be adjusted by changing what is the chemical composition in the area emitting light or active region.
LEDs are made up of compound semiconductors, composed of elements that belong to the groups III and V in the periodic table (these are also known as III-V substances). The most common III-V materials employed to create LEDs include gallium arsenide (GaAs) and gallium Phosphide (GaP).
In the beginning of the 90s, LEDs were available in a limited number of colors , with commercial white and blue LEDs were not readily available. With the introduction of LEDs made of the gallium-nitride (GaN) materials system widened the color spectrum and provided for a wide range of new possibilities.
Main LED materials
The most important semiconductor materials that are utilized in the manufacture of LEDs are:
- Indium gallium Nitride (InGaN):blue, ultraviolet and green high-brightness leds.
- Aluminum gallium Phosphide (AlGaInP):yellow, red and orange high-brightness LEDs
- Aluminum gallium arsenide (AlGaAs):red and infrared LEDs
- Gallium Phosphide (GaP):yellow and green LEDs
Learn About LED Lighting
- The Basics
- How is LED lighting different?
- Which are motives to choose energy efficient STAR(r) lighting bulbs that are ENERGY STAR(r) approved?
The Basics of LED Lighting
What are LEDs and how do they work?
LEDstands for light emitting diode. LED lighting products emit light that is up to 90% more efficiently than incandescent light bulbs. What's the reason for their operation? A flow of electrical energy flows through the microchip. This results in very tiny amounts of light. known as LEDs. The output is visible light. To avoid performance issues the heat generated by LEDs is then absorbed by a heat sink.
Lifetime of LED Lighting Products
The life span of lighting LED devices differs in comparison to various sources of lighting, such as incandescent light and CFL (also known as compact fluorescent lights (CFL). LEDs typically do not "burn out" or fail. Instead, they undergo "lumen depreciation" which is the process where the LED's brightness decreases gradually over time. In contrast to bulbs that use incandescents, the LED's "lifetime" is established on an estimation of the time when the brightness decreases by 30 %.
How are LEDs Used in Lighting
LEDs are built into fixtures and bulbs for general lighting requirements. Small in size, LEDs provide unique design opportunities. Certain LED bulb options might physically resemble traditional light bulbs and can enhance the style of traditional light bulbs. Certain LED lighting fixtures may include LEDs that can be used as an endless light source. Furthermore, there are hybrid lighting fixtures that employ an unconventional "bulb" or replaceable light source is employed and specifically designed to create an unusual fixture. LEDs are a fantastic way to innovate in lighting design and can be used in many different ways than traditional lighting technology.
LEDs and Heat
LEDs use heat sinks to absorb the heat produced by the LED, and afterwards disperse it to the environment. This helps to prevent LEDs from becoming too hot as well as burning out. The control of heat is generally the most important aspect in the performance of an LED throughout its life. The more heated the LEDs are, the faster the light's performance will decrease and the less lifespan of the LED will be.
LED bulbs make use of a variety of different designs for heat sinks and configurations to control the heat. Modern advancements in materials enable manufacturers to design LED lights that're akin to the sizes and shapes of conventional incandescent bulbs. No matter what the shape or design of the heat source, the majority of LED products given the ENERGY STAR have been evaluated to ensure that they're able to regulate the heat to ensure that the brightness is kept up until the end of their specified lifespan.
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