LED Illumination Demystified: The Principle at Work

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What is the basis of LED lighting?

If you’re looking to grasp the fundamentals of LED light-emitting technology, you need to first comprehend LED as well as the structure of LED lights.

Then you will know the ways LEDs emit light. Have a look at the video below.

1.What is LED?

LED is an abbreviationof English Light Emitting Diode, which means light-emitting diode in Chinese. It is made of compounds that contain gallium (Ga), as well as phosphorus, nitrogen and arsenic.

2.Structure of LED lights

The heart of the light-emitting diode an n-type wafer that is composed of p-type semiconductor and n-type semiconductor. There is a layer of transition between the p-type semiconductor and n-type semiconductor, known as a p-n junction. As you can see in the photo below, it is comprised of five components: the bracket, silver glue, chip, gold wire and epoxy resin.

3.LED principle of light

The electrons and holes of the N-type and P-type semiconductors are violently colliding within the light emitting layer which results in photons. The photons emit energy as photons.

The principle of LED color lighting

If you’d like to learn the basic principles of LEDs emitting light in a variety of colors first, let’s get familiar with the three principal colors: red (R), green (G) and blue (B).

The three colors are used to create different shades. When green light and red are both on together, they create yellow.

The principle of color-changing in the lamp’s color changing mechanism is that when two LEDs are lit in turn, through three primary color LEDs, it can emit yellow purple, and the color cyan (such as red ) three LEDs glow simultaneously they produce white light.

If there’s a circuit that can make the green, red, and blue LEDs shine in pairs, individually, and three primary colors LEDs on simultaneously, it will emit seven different colors of light, so the bright LED lights show up.

The colors generated by this phenomenon depend on the proportions at which they are superimposed.

What’s the difference between cheap LED lights and high-end LED lights?

The LED lights can be classified into two categories.

The first one is a kind of light source that includes spotlights and street lights. They are typically used to light up the area.

Lanterns are a second type of decoration and lighting. They are lamps with special shapes as well as chandeliers, floor lamps etc.

Decorative or finished Lamps. The difference between expensive and low-cost lamps is simple to recognize.

These chandeliers are all chandeliers. One is a K9 crystal chandelier and the other is a standard chandelier. Also, there is some made of rubber, glass, etc.

Prices and materials differ. It’s the same thing, so I won’t get into the details.

This question was probably not put forward by the poster. Today we will discuss the core luminous source and power supply components of LED lights.

Let’s talk about lamp beads first

If you’d like a more thorough explanation, is a solid statesemiconductor that converts electrical power into light.

The chip is made up of two parts that are P-type, one and the other with an N-type. If current is passing through the wafer electrons of the N type semiconductor will move onto the P-type silicon.

The principle of LED light is that, when the N-type and P-type electrons of semiconductors collide the energy is released by the form of photons.

The material that makes up the P-N junction is responsible for determining the wavelength of light.

The LED light source is made up of a chip or crystal that emits LED lights.

After the chip is manufactured by epitaxy, grinding, evaporation, and other processes for manufacturing, the amount of P-N electrons that are in the chip, the scratches on the P-N electrode, and so on.

The brightness of the chip will be affected by the rate of conversion from electricity to lighting. Certain models have higher conversion rates and are more bright. others have lower conversion rates, that is known as bare crystal brightness.

Each chip has an attenuation level, which measures the efficiency at which electrical energy can be converted into light in a short period of time.

The more stable the chip is the more stable it is, the better. The chips’ effective life could theoretically be as long as 100,000 hours.

The purpose of the packaging is to safeguard the LED chip, while allowing it to transmit light to its maximum and dispersing heat produced by light emission.

There are currently process that are pin-type positive and flip-chip COB-type centralized packaging power-type packaging.

Based on the process of packaging The final price of LED will vary based on the packaging process.

A second, similar packaging design will come with distinct final control of heat dissipation and stability as well as price.

Let’s talk about power supply

The LED power supply, sometimes called driving power supply, performs only one purpose, which is to provide stable voltage and constant power supply to LED lamp beads.

The LED will begin to fade if the current is too excessive or unstable.

LED is a highly energy-efficient product that consumes very little power.

Typically, the voltage of operation is usually a few volts. Some that go up to hundreds of volts are special lamps.

The power used is very low, and is usually measured in milliamps. The lamps we see each day, The wiring is directly connect to the 220V household mains power.

It first passes through the power supply for driving after which the voltage is rectified and stabilized before being sent to the LED lamp.

There are two kinds: isolation and non-isolate. After decreasing the voltage, the non-isolated power supply will connect directly to the LED light.

Isolated power supply is when the output and input are separated by an appropriate transformer.

There is a process that involves changing magnetic to electrical, followed by electrical conversion. It’s safer than non-isolated supply.

Power supply is expensive and that is why the cost.

Furthermore, whether or not the LED drive power supply comes with functional guarantees like short-circuit protection, surge protection, leakage protection, power-off protection etc. is also a core factor that determines the final cost of the lamp.