What is the principle of LED lighting?
If you are looking to comprehend the principle of LED light-emitting, then you must first understand LED and the structure of LED lights.
Only then can you understand how LED emits light. Take a look at the video below.
What exactly is LED?
LED is an abbreviationof English light emitting diode. This is the term used to describe dime with light emission in Chinese. It is composed of compounds containing gallium (Ga) as well as arsenic (As), (P), phosphorus (P) and nitrogen (N) and so on.
2.Structure of LED lights
The heart of the light-emitting device is made up of p-type semiconductor and n-type. There is a layer of transition between the p type semiconductor and the n type semiconductor, referred to as a p-n junction. As you can see in the photo below, it is made up of five parts comprising bracket, silver glue chip, gold wire, and epoxy resin.
LED lighting principle
The holes and electrons of the P-type and N type semiconductors violently collide within the light emitting layer which results in photons. These photons are then released to emit energy as photons.
4. Colorful LED lighting principle
If you’re interested in understanding the fundamentals of bright LED light-emitting then first we need familiar with the three principal colors of red (R), green (G) and blue (B).
These three colors can be blended to create other colors. If the green light and red light are on at the same time the same wavelength, they combine to create yellow.
If two LEDs are light, the lamp can produce three colors: cyan, purple, and yellow.
A circuit that produces seven distinct colors can be made by an electronic circuit that can light up red, green and blue LEDs together and three main LEDs simultaneously.
This phenomenon can produce different colors depending on the different ratios of their superposition.
What is the difference between high-end LED lights as well as low-cost LED lights?
The LED light can be classified into two broad categories.
One is the type of light source that includes spotlights, downlights, street lights, etc. They are utilized to light up the area.
Another type of lantern is the one called lanterns, which include chandeliers, special-shaped lamps such as floor lamps, etc., which serve as decoration and lighting.
For lamps that are finished or decorative, the difference between cheap and expensive lamps is a breeze to grasp.
These are all chandeliers. One is a K9 crystal chandelier and the other is a standard chandelier. Also, there is glass, rubber etc.
The materials used are different and the prices are different. It’s the exact same, so I won’t discuss the specifics.
This question was probably not put forward by the poster. We’ll discuss the LED light’s primary lighting sources and power source this morning.
Let’s talk about lamp beads first.
If you’d like a more in-depth explanation, is a solid statesemiconductor that can convert electrical power into light.
One end of the chip is a semiconductor of the P type, while the other side is an N-type semiconductor. The electrons that are from the N-type will be transferred to the P type as current is passed through the wafer.
When the semiconductor electrons of type N meet the P-type semiconductor electrons, energy will be released by photons. This is the basis of LED lights.
The substance that forms the P-N junction determines the wavelength of light.
The core of the LED light sourceis the chip/crystal that emits light from LEDs.
After the chip has been manufactur-ed through epitaxy, grinding, evaporation and other processes for manufacturing, the number of P-N electrons inside the chip, scratches on the electrode of P-N, etc.
The brightness of the chip will be dependent on the speed of conversion from lighting to electricity. Certain models have higher conversion rates and are brighter, whereas others have lower conversion rates which we call bare crystal brightness.
Every chip also has a degree of attenuation, which is a measure of the efficacy with which electrical energy is converted to light over a span of time.
The more stable it is, the better. The chip’s lifespan can theoretically last for 100,000 hours.
After the chip production has been completed, the chip is packaging, that is the LED chip is made into lamp beads which all will see in their daily LED lamps.
The function of packaging is protecting the LED chip, while allowing it to transmit light at the highest level and dissipating the heat energy that is generated by light emission.
There are currently pin-type positiveprocess, flip-chip type centralized packaging (power-type packaging) and many more.
The final price of LEDs will depend on the packaging.
Second, a similar packaging structure will have distinct final control of heat dissipation, stability, and cost.
Let’s talk about power supply
The LED power supply, sometimes referred to as driving power supply has only one job, providing stable voltage and constant current supply of power to LED lamp beads.
The LED will age quickly if the current level is too excessive or unstable.
LED is a highly energy-efficient product with low power consumption.
The typical working voltage is minimally a few hundred volts. Special-purpose lamps can be able to reach temperatures of up to tens.
The current used is also quite low, usually calculated in milliamps. The lights we see every day, the wiring directly connected to 220V mains power for the household.
It is first pass through the supply of power for driving after which the voltage is stabilized and rectified prior to being transferred to the LED lamp bead.
There are two kinds: isolation and non-isolate. The non-isolate power source is directly connect to the LED lamp after the voltage is reduce.
Isolated power supply refers to the fact that output and input are separated by an appropriate transformer.
There is a procedure of electrical conversion to magnetic and then conversion to electrical. It’s safer than a non-isolated supply.
Power supply is expensive and so is the cost.
Additionally, whether the LED drive power supply offers functional guarantees like surge protection, short-circuit protection leakage protection, power-off protection etc. is also a core factor that determines the final cost of the lamp.