Description

A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it.

Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons.

The 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.

White light is obtained by using multiple semiconductors or a layer of light-emitting phosphor on the semiconductor device

Early LEDs were often used as indicator lamps, replacing small incandescent bulbs, and in seven-segment displays. Recent developments have

produced high-output white light LEDs suitable for room and outdoor area lighting. LEDs have led to new displays and sensors, while their high

switching rates are useful in advanced communications technology.

LEDs have many advantages over incandescent light sources, including lower energy consumption, longer lifetime, improved physical robustness,

smaller size, and faster switching. LEDs are used in applications as diverse as aviation lighting, fairy lights, automotive headlamps, advertising,

general lighting, traffic signals, camera flashes, lighted wallpaper, horticultural grow lights, and medical devices.

In the simplest terms, a light-emitting diode (LED) is a semiconductor device that emits light when an electric current is passed through it. Light is

produced when the particles that carry the current (known as electrons and holes) combine together within the semiconductor material.

Since light is generated within the solid semiconductor material, LEDs are described as solid-state devices. The term solid-state lighting, which also

encompasses organic LEDs , distinguishes this lighting technology from other sources that use heated filaments (incandescent and tungsten halogen

lamps) or gas discharge (fluorescent lamps).

Aluminum PCB is Low in Cost:

As compared to other components, aluminum is low in price.Most of the leading LED manufacturer companies are using it for cost-effective

production.

Inside the semiconductor material of the LED, the electrons and holes are contained within energy bands.

The separation of the bands (i.e. the bandgap) determines the energy of the photons (light particles) that are emitted by the LED.

The photon energy determines the wavelength of the emitted light, and hence its color.

Different semiconductor materials with different bandgaps

produce different colors of light. The precise wavelength (color) can be tuned by altering the composition of the light-emitting, or active, region.

LEDs are comprised of compound semiconductor materials, which are made up of elements from group III and group V of the periodic table (these

are known as III-V materials).

Examples of III-V materials commonly used to make LEDs are gallium arsenide (GaAs) and gallium phosphide (GaP).

The main semiconductor materials used to manufacture LEDs are:

Indium gallium nitride (InGaN):blue, green and ultraviolet high-brightness LEDs

Aluminum gallium indium phosphide (AlGaInP):yellow, orange and red high-brightness LEDs

Aluminum gallium arsenide (AlGaAs):red and infrared LEDs

Gallium phosphide (GaP):yellow and green LEDs

Aluminum is one of the elements that have durability.The aluminum LED PCB can be used for a long time.

Aluminum PCB is Lightweight:

Aluminum is not as heavy as compared to other material or material that is used in other LEDs.?It does not only provide durable performance but also

light-weighted.

Aluminum PCB is Low in Cost:

As compared to other components, aluminum is low in price.?Most of the leading LED manufacturer companies are using it for cost-effective production.

Andwin Circuits as a industry leading of PCB manufacturer since 2003.

Specializing in multilayer PCB, Rigid flex PCB, HDI PCB, controlled impedance PCB and Radio Frequency circuit, from quick turn prototype to mass products.