Science of LED Lights
The light emitting diode which is commonly known as “LED” lights is a semi conductive device which produces the light when the electrical current flows through it. It is a source of light that illuminates the room and produces lights commonly in today’s household and other purposes also due to its low electricity power consumption.
Working of LED’s
An LED consists of a chip of semiconducting material which is being treated to create a positive negative terminal commonly known as p-n terminal junction. When it gets connected to the power source the electric current flows from the positive side (p side) anode to the negative side or cathode but not in the reverse direction. Charge carriers (electrons and electron holes) flow into the junction in the electrodes. When an electron meets a hole it generally falls into the lower energy level and releases energy in the form of photon.
It was the year of 1960, LED were first discovered but were used as an indicator application until used recently. The electronics industry has been used LED technology for several decades as an indicator of lights for various electronic devices. In recent years LED technology has reached a point where it is viable for generating general lighting applications and gained mainstream recognition as a primary portable light source.
Functionalities of LED in emitting different colour
The specific wavelength or colour emitted by LED depends on the materials used to make the diode. Generally the red LED’s are based on aluminium gallium arsenide’s. Blue LED’s are generally made up of gallium nitride and the green from the aluminium gallium phosphide. White light is generally created by combining both the red, green and blue LED’S or by coating a blue LED with yellow phosphor.
Main use of LED in lighting Industry
They are mainly used for the aesthetic effect or special lighting applications including architectural lighting and highlighting. Most traffic lights and exit signs also include the LED lights in today’s world. LED lights are common place in almost in all home electronics, toys and novelty items. Christmas lights are becoming popular in a LED variety and many cell phones and handheld electronics use. LED got so much preference in today’s competitive world due to its light weight, limited power drain and non-heating properties. LED lights have made portable and battery operated lighting much more affordable to manufacturer resulting in improving products such as battery operated lamps, flashlights, light wands and even new and fun applications such as light up sports balls and flameless candles.
Does LED find its application in general illumination lightening?
The answer is absolutely a big “NO “. Early attempts to apply LEDs in general illumination lighting failed because they didn’t meet the lumen per watt output or colour requirements. Technology has now advanced to the point where using LED for general illumination is viable. Lighting industry experts are gaining a better understanding of how to capitalize on that technology.
Advantages of LED lights
LED brings several advantages to the lighting industry which includes:
· High efficiency and Durability.
· Superior life over other lamp sources.
· Required maintenance is reduced.
· Increases energy savings
· The overall maintenance saving is also raised.
· The overall reduction in cost of ownership.
· Reduction in the cost of ownership over the products lifetime.
Possibility of Replacement of LED Diodes?
Just like an ordinary bulb, LED generally doesn’t burn out like that. But sometimes if it happens then it might be any exceptional case which we can ignore as of now. So the individual diodes need not to be replaced. Gradually the diodes produce the lower output levels over a very long period of time. If one LED fails it then does not produce the complete fixture out stage.
Contented by: Glimmer Gear.