LED is short for Light Emitting Diode, one of many semiconductor devices that emit light when an electric current is passed through them.
In addition to lighting, LEDs are also part of the seven segments in digital clocks and timers and are used in remote controls. Many people don’t realize that the revolutionary lighting technology that is taking over the world today was invented more than 50 years ago.
First developed in 1962, commercial LED lighting has been around since the 1980s when it began to be produced, but only infrared electroluminescent diodes were available then. Other colors emerged in the 1990s when blue saltpeter was developed in Japan.
The explosion of the white light bulb, the most widely used and sought after, occurs when blue saltpeter is combined with a yellow luminophore to produce a long wavelength. The result of this combination is light that the human eye perceives as white.
LED functions are widely used for two things: illumination and indication. These are technical words but essential to understand because it will be very disappointing if you want LEDs for one particular thing and buy the wrong thing.
Illumination means “to shine a light on something,” such as a flashlight or headlamp. For example, you want your headlights to be very bright. Brake lights should be bright enough to see but need not illuminate the road.
Indication means “to show something,” like the car’s turn signal or brake light. Diffused LEDs are great at pointing, they look soft and uniform, and you can see them well from any angle.
Transparent LEDs are great for lighting, the light is direct and robust, but you can’t see it very well from an angle because the light only travels forward.
The primary function of LEDs (Light Emitting Diodes) is to illuminate objects and even places. Its applications are ubiquitous due to its compact size, low energy consumption, long service life, and flexibility in various applications. Following are the functions of LEDs and their uses around us.
Used in Automotive
The use of LEDs in the automotive industry is growing. With LED, energy is saved, and visibility is clearer. It is widely used at the back and back of the car for better accessibility.
LED lighting can improve pedestrian and driver safety by improving visibility when it is ON, OFF, and dimmed at any part of the journey. You can see various kinds of wireless tail lights products, and we sell different types of lights that you might be interested in in the future
Working Principle of LEDs
As the name suggests, a semiconductor is a kind of in-between a superconductor and an insulator (non-conductor) of electricity. These materials are poor conductors by default, but when infused (known as doping) with additional free electrons create an end product that is a better conductor.
Another way to make a better conductor is to punch microscopic holes in the poor conducting material so that electrons can flow through them.
When electrons fill these holes due to a current or electric field applied to the semiconductor, it emits light, a phenomenon known as electroluminescence. This is the light source for the LED. Unlike the incandescent light bulb, they do not have a filament.