What is the basis of the LED lighting?
If you wish to grasp the principle of LED light-emitting, you must first be aware of LED and the structure of LED lights.
Only then will you be able to understand how LED emits light. Take a look below!
1.What is LED?
LED is an abbreviationof English Light Emitting Diode. It is a light-emitting diode Chinese. It is a ma-de compound which contain gallium (Ga), arsenic (As) and Phosphorus (P) and nitrogen (N) and so on.
LED Lights’ Structure
The main component of the light emitting diode is an n-type wafer that is composed of p-type semiconductor and n type semiconductor. A pn junction is the layer of transition that is between pn semiconductor and semiconductor. As illustrated in the image below, it is made up of five components that are: bracket, silver glue, chip, gold wire, and epoxy resin.
The principle of LED lighting
When a current flows through the chip electrons of the N-type semiconductor and the holes in the P-type semiconductor violently collide and recombine in the light-emitting layer. This causes them to create photons that emit energy in the form of photons (that is, the light that we see).
The principle of LED color lighting
To comprehend the basic principle behind the vibrant LED light-emitting let’s first get to be aware of three primary colors which are: Red (R), Green (G) and Blue (B).
Different colors can be made by mixing different combinations of the three colors. For instance, when both green and red light are both lit at the same time both green and red lights will be mixed to produce yellow.
The basic principle behind the color-changing lamp is that when two LEDs are lit in turn, through three primary color LEDs it can emit yellow purple, and Cyan (such as red ). If the red, green and blue LEDs glow simultaneously they produce white light.
A circuit that emits seven colours can be constructed by a circuit which can light up green, red and blue LEDs together and three main LEDs at the same time.
This phenomenon produces different colors depending on the various ratios of their superposition.
What is the difference between high-end LED lights versus cheap LED lights?
The LED light can be classified into two main categories.
One is the light source, which mainly includes spotlights, downlights and street lights and so on. They are utilized for lighting purposes.
Lanterns are a second type of decoration and lighting. They can be found in special-shaped lamps such as chandeliers, floor lamps, and more.
Lights that are finished or decorative. The distinction between cheap and expensive lamps is easily understood.
All chandeliers are. One chandelier is the K9 crystal chandelier while the other is a standard chandelier. Also, there is other chandeliers like rubber, glass etc.
The materials are different and the price is different. It’s the same, so I won’t get into the details.
The poster may not have wanted to ask this. Today we will discuss the core luminous source and power supply parts of LED lights;
First, let’s talk about the lamp beads.
If you’d like a more specific explanation, is a solid statesemiconductor that can convert electrical power into light.
One end of the chip is a semiconductor of the P type, and the other end is an N-type semiconductor. As the current moves through the wafer, the electrons of the N-type semiconductor will be push to the P-type semiconductor.
When electrons of the N-type semiconductor meet the P-type semiconductor electrons, Energy is released by photons, which is the fundamental principle behind LED lights.
The material that creates the P-N junction determines the wavelength of light.
The light source LED is composed of a chip or crystal that emits LED lights.
After the chip is manufactured through epitaxy and grinding, evaporation and other manufacturing processes, the number of P-N electrons inside the chip, scratches on the electrodes of the P-N, etc.
This will cause a variation in the brightness of the rate of conversion of the chip from electricity to light. Certain chips have a higher conversion rate, and therefore are brighter than others, while some have a lower conversion rate, also known as bare crystal brightness.
Every chip also has a level of attenuation which is a measure of the effectiveness with which electrical energy can be converted into light over a certain period of time.
The more reliable it is the more stable it is, the better. The theoretical life of the chip could be as high as 100,000 hours.
The primary function of a packaging is to protect the LED chip from damage while transmitting light to the greatest extent and dispersing the heat energy that is generated by light emission.
There are at present pin-type positiveflip-chip and flip-chip-processes, COB type central packaging (power-type packaging) and more.
The final cost of LEDs will differ based on the package.
A second, similar packaging structure will have an entirely different control over heat dissipation, stability, and cost.
Discussion about power supplies
LED power supply (also called driving power supply) has a single function that is to supply LED lamp beads that are of constant voltage and constant current.
The LED will age quickly if the current level is too excessive or unstable.
LEDs are efficient in energy use and have low power consumption.
Typically, the voltage of operation is minimally a few hundred volts. A few that reach the tens of volts range are called special-purpose lamps.
The power used is rather low, typically calculated in milliamps. The wire is connected directly the mains power of 220V.
The voltage is then stabilized and rectified before being transmitted to the LED light bead.
It is divided into non-isolate and isolate. The non-isolate power supply will directly connect to the LED lamp after the voltage is decreased.
Isolated power supply is when the output and input are separated through the use of a transformer.
The process involves switching magnetic energy into electrical, and then back again. It’s a lot safer than an isolated power supply.
The energy supply is expensive and costs are more expensive.
Also, verify if the power supply for LED drives provide functional warranties, including protection against short circuits or surge protection, as well as power-off protection. is a major factor which affects the final price of the lamp.