What is meaning of LED ?

For example, if you look closely at a street light, you can tell it is an LED light if each circle is comprised of a series of dots.

Stands for "Light-Emitting Diode."

A Light-Emitting Diode in essence is a P-N junction solid-state semiconductor diode

that emits light when a current is applied though the device.

LEDs produced only red light

it is a solid-state device that controls current without the deficiency of having heated filaments.

How does a LED work

White LEDs ordinarily need 3.6 Volts of Direct Current

use approximately 30 milliamps

of current and has a power dissipation of approximately 100 milliwatts

The positive power is connected to one side of the LED semiconductor through the anode and a whisker and the other side

the semiconductor is attached to the top of the anvil or the negative power lead

It is the chemical composition or makeup of the LED

semiconductor that determines the color of the light that the LED produces as well as the intensity level

The epoxy resin enclosure allows most of the light

to escape from the elements and protects the LED making it virtually indestructible.

. Furthermore, a light-emitting diode does not have any moving parts,

which makes the device extremely resistant to damage due to vibration and shocks.

These characteristics make it ideal for purposes that demand reliability and strength.

LEDs therefore can be deemed invulnerable to catastrophic failure when operated within design parameters.

Figure 1 shows a typical traditional indicator LED

Stands for "Light-Emitting Diode.

Traditional indicator LEDs utilize a small LED semiconductor chip that is mounted on a reflector cup

LED is an electronic device that emits light when an electrical current is passed through it.

also known as the anvil, on a lead-frame (whisker)