What is the technology used in LED?
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a basic pn-junction diode, which emits light when activated. When a fitting voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.
Which is latest technology in LED?
LiFi. The newest concept to come from the evolution of LED lighting is Li-Fi. Essentially, Li-Fi is the upgraded version of Wi-Fi internet connectivity using light rather than radio waves with an ability to transfer data at speeds up to one hundred times faster!
What is LED and how it works?
LED stands for light emitting diode. LED lighting products produce light up to 90% more efficiently than incandescent light bulbs. How do they work? An electrical current passes through a microchip, which illuminates the tiny light sources we call LEDs and the result is visible light.
How do LED lights work?
An LED bulb produces light by passing the electric current through a semiconducting material—the diode—which then emits photons (light) through the principle of electroluminescence. Don’t let that big word scare you! The electrical resistance of the filament causes it to get so hot that it glows, producing light.
What are the benefits of using LED?
Here are some advantages of LED lights:
- Long Lifespan.
- Energy Efficiency.
- Improved Environmental Performance.
- The Ability to Operate in Cold Conditions.
- No Heat or UV Emissions.
- Design Flexibility.
- Instant Lighting and the Ability to Withstand Frequent Switching.
- Low Voltage Operation.
What are the applications and characteristics of LED?
Characteristics of LED
- Light Generated by LED is Directional. A. LED is all forward directional lighting, not Omni as conventional light bulb.
- LED can Generate Different Light Color. A.
- Temperature will Affect LED Efficacy. A.
- Low Energy Consumption. A.
- Long Life.
What is the future of LED lights?
Future LED bulbs will cost less, consume less energy, last longer, and do much more than illuminate your home. The LEDs of the future will be able to create lights in multiple colors, stream music, and communicate alerts and data.
Which semiconductor is used in LED?
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.
What voltage do LEDs use?
Typically, the forward voltage of an LED is between 1.8 and 3.3 volts. It varies by the color of the LED. A red LED typically drops around 1.7 to 2.0 volts, but since both voltage drop and light frequency increase with band gap, a blue LED may drop around 3 to 3.3 volts.
Who invented LED?
Nick Holonyak, Jr.
The next year, in 1962, Nick Holonyak, Jr. (the “Father of the Light-Emitting Diode”) invented the first LED that produced visible, red light while working at General Electric. Throughout the 1960s, researchers and engineers continued experimenting with semiconductors with the goal of producing more efficient LEDs.