To the answer the question of what is led? We could say that led is a semiconductor source of light. It is used as an indicator lamp in many devices and emits a low intensity light. It works through a recombination of electrons with electron holes within the device leading to a release of photons or energy. The led has several advantages over those lamps. Leds are more efficient. They don’t require any color filter to give color. They are very small and can be easily incorporated into circuit boards. Voltage sensitivity, temperature dependence and high initial costs are some disadvantages.
To the question what is led? We could say that led is a semiconductor source of light. It is used as an indicator lamp in many devices and emits a low intensity light. LEDs have several advantages over incandescent lights. They use less energy, have a longer lifetime, are more robust, are smaller in size, have faster switching rate and are very durable and reliable.
People who do not know about the LED often ask what is led and how does it work? The led is the technology that works through the recombination of electrons with electron holes within the device leading to the release of photons or energy. Through the electroluminescence accompanying this process light is emitted from the led. Depending upon the energy gap of the semiconductor an appropriate amount of energy is released and different colours of light are emitted. Early versions emitted only a low red light but modern leds emit visible, ultraviolet and infrared rays.
If you are wondering, what is led and where can you find it? Led is the device used in a number of electronic products from TV remotes to sirens. They are used as replacements for aviation lighting, in automobiles for brake lamps, indicators and turn signals. They are also used in traffic signals.
In addition several devices requiring text and video display require led. It is very much a part of day to day life because of its use in television remotes, DVD players and household appliances. Several people wonder what is led and how is it better than fluorescent lamps? The led has several advantages over those lamps. Leds are more efficient as they emit more light per watt than that emitted by other light bulbs. Shape and size don’t influence efficiency. They don’t require any color filter to give color. They are very small and can be easily incorporated into circuit boards. Since switching time is less they can be used as communicating devices as they switch on and off easily. They are also shock resistant and focus light without any assistance.
They also have some disadvantages. A person inquiring about what is led, will find that although led is powerful enough for room lighting, it is more expensive and needs more precise current and heat management than fluorescent lamps. There is also voltage sensitivity, temperature dependence and blue hazard associated with led lights.
So next time you need to choose between leds and regular bulbs you need not wonder what is led? Think of the disco, glow sticks and other fun lights but remember that led is also a part of household appliances and communicative devices. Keep the above advantages and disadvantages in mind and choose the best for your purpose