Detailed explanation of LED panel light components and technology
With the development of the LED lighting industry, LED panel lights, derived from LED backlights, have uniform light, no glare, and exquisite structure, which have been loved by many people and are a new trend in modern and fashionable indoor lighting. Next, Xinjie lighting LED panel light manufacturer will introduce the 8 major components of LED panel light.
8 major components of LED panel light
1) LED panel light aluminum frame
It is the main channel for LED heat dissipation, with a simple and elegant appearance. ZY0907 can be used. The cost of mold opening and processing is low. The IP level of the die-cast aluminum frame can be higher, the surface texture is good, and the overall appearance is beautiful, but the cost of the mold is invested in the early stage. higher.
2) LED panel light source
Usually LED panel lamp beads use 3528, and some people use 3014 and 5050. The cost of 3014 and 5050 is low, and the light efficiency is slightly worse. The key is the difficulty of designing light guide points. 3528 has high luminous efficiency and good dot versatility.
3) LED panel light guide plate
The side LED light is refracted through the dots so that the light is evenly exported from the front, and the light guide plate is the key point of the quality control of the LED panel light. If the dot design is not good, the overall light effect seen will be very poor. Generally, there will be a bright middle and dark sides on both sides, or there will be a bright light band at the incoming light, or a local dark area may be visible, or there will be inconsistent brightness at different angles. To improve the light efficiency of the LED panel light guide plate mainly depends on the design of the mesh point, followed by the quality of the LED panel light plate, but there is no need to superstitute the first-line famous brand plate, the light transmittance between qualified plates is usually almost the same. The general small LED panel light factory directly buys the public light guide plate for use, so there is no need to re-proof the design. The public version used by many LED panel light manufacturers is usually of qualified quality.
4) LED panel light diffuser
The light of the light guide plate is evenly exported, and it can also play the role of blurring the dots. The LED panel light diffuser generally uses acrylic 2.0 sheet or PC material, which is almost PS material. The cost of acrylic is lower and the light transmittance is slightly higher than that of PC. Acrylic is brittle and has weak anti-aging performance. The price of PC is slightly expensive, but Strong anti-aging performance. After the diffuser is installed, the dots cannot be seen, and the light transmittance should be about 90%. The light transmittance of acrylic is 92%, PC is 88%, and PS is about 80%. You can choose the diffuser material according to the needs of LED panel lights. At present, most LED panel light manufacturers use acrylic materials.
5) LED panel light reflective paper
Reflect the residual light on the back of the light guide plate of the LED panel light to improve the light efficiency, generally RW250.
6) LED panel light rear cover
The main function is to seal the LED panel light. Generally, 1060 aluminum is used, which can also play a role in heat dissipation.
7) LED panel light drive power supply
At present, there are 2 kinds of LED driving power supply for LED panel lights. One is to use constant current power supply, which has high efficiency, PF value as high as 0.95, and high cost performance; the other is to use constant voltage and constant current power supply, with stable performance, but low efficiency and high cost , Generally, the LED panel lights that use this power supply are mainly exported, and the other party requires certification requirements, and a power supply with safety regulations must be used.
In fact, it is very safe to use the constant current power supply of LED panel lights at home, because it is difficult for users to access the power supply, and the lamp body itself uses safe low-voltage power.
8) LED panel light installation pendant
Suspension wires, mounting brackets, etc. are used to install fixed accessories for LED panel lights.
From the perspective of quality control, it is most effective to spend additional money on LED light sources and LED light guide plates to improve the lighting effect of LED panels. From the perspective of market sales, it is most effective to spend additional money on aluminum frame cover pendants And so on can improve the product grade.
Three key technologies of LED panel lights
1. Optical performance (light distribution):
The optical performance of LED panel lights mainly involves the performance requirements of luminosity, spectrum and chromaticity. For white LEDs commonly used in LED panel lights, color temperature, color rendering index and illuminance are particularly important. They are important indicators of lighting atmosphere and effects, while color purity and dominant wavelength are generally not required.
The mainstream practice in the LED industry is to perform light distribution when making LED panel light fixtures after packaging LED chips to form a light source or a light source module. glow. If you want to guide the light to the application side, Philips' traditional lamps are the best, and the light loss also reaches 40%. However, the optical parameters of lamps applied by many downstream manufacturers of LED panel lights in China are actually the optical parameters of chips or light sources, not the optical parameters of the overall LED panel lights.
How to better improve the performance of LED panel lighting, the latest technology in the world is to do light distribution on the chip package, export the light of the chip at one time, and maintain the maximum light output, so that the LED panel light loss rate is only 5%-10%.
With the continuous improvement of LED panel light technology, the light loss rate will be lower and lower, and the light efficiency of the light source will be higher and higher. Also equipped with such a light source LED panel light does not need to do light distribution, the relative efficiency of the lamp will be greatly improved, making it more widely used in functional lighting, forming a market channel of considerable scale.
Therefore, a good LED panel light supplier is a top priority. We don't need to spend a lot of money to study how our LED panel lights are distributed, and we don't need to spend a lot of time and experience for LED panel light engineers to use software simulation. , the easiest way is to let LED white light suppliers cooperate. You must know that if our LED panel light engineers use software to simulate, the necessary actions are input and output. The input is the import of data in the early stage, and the output is the result of the simulation, so the data in the early stage must be accurate and the back-end simulation can be correct.
2. Thermal performance (structure) of LED panel light:
The luminous efficiency and power supply of LEDs for lighting are one of the keys to the LED industry. At the same time, the PN junction temperature of LEDs and the heat dissipation of the housing are particularly important. The greater the difference between the PN junction temperature and the body temperature of the LED panel light, the greater the thermal resistance of the LED panel light, and then the light energy is converted into heat energy and consumed in vain, and the LED is damaged in severe cases. A good LED panel light structural engineer should not only consider the structure of the lamp and the thermal resistance of the LED, but also whether the shape of the LED panel light is reasonable, fashionable and novel, and of course reliability, maintainability and practicability. It is necessary to think from the perspective of the designer, and to consider the product from the perspective of the user of the LED panel light.
Today's common technology is to use aluminum substrates to package LED panel lights. There are technical core bottlenecks in chip heat dissipation and light conversion efficiency of aluminum substrate packaging, and the junction temperature cannot be effectively controlled to stably maintain high-power light output, and the application will be due to chip light. The higher the efficiency, the larger the area of the aluminum substrate required, which will increase the cost and application volume, which is extremely inconvenient.
So how to get out of this misunderstanding and find a new way is the core feature of the new technology. On the premise of maintaining low cost and passive heat dissipation, the use of high thermal conductivity medium, through the new overall structure of the device/lamp, reduces thermal resistance, lowers the PN junction temperature, makes the PN junction work within the allowable operating temperature, and maintains the maximum number of photons Output, the minimum requirements are as follows:
(1) Ultra-low thermal resistance material, rapid heat dissipation overall structure technology;
(2) High thermal conductivity and anti-UV packaging technology;
(3) Application of low environmental stress structural technology;
(4) Overall thermal resistance <20K/W, junction temperature <80 degrees;
(5) The working temperature of the LED light source lighting module is controlled below 65°C.
3. LED panel light electrical properties (electronics):
If a lighting LED panel light is compared to a girl, then light distribution is her connotation, structure is her appearance, and electronics are her heart. A person has no life without a heart, and an LED panel light cannot be a power source without electronics. A good driving power supply can also determine the life of an LED panel light.
The electronic standards and parameters are often much more complicated than the structure, and the R&D energy investment in the early stage is also relatively large. The current technological trends and updates are changing with each passing day, and LED panel light engineers have to spend a lot of energy to learn, absorb, decompose and apply new technologies.
The pre-planning of the electronic design of LED panel lights, the implementation in the mid-term, and the formation of documents and data in the later molding process are also the most tedious things in the design. For example: a preliminary plan for the design of an LED panel light power supply, product introduction, standard specification basis, safety specification basis, electrical performance expectations, process requirements, raw material evaluation, test methods, etc. must be formed into system documents.
Powerful LED drive power
As the core component of the LED panel light, the LED power supply is like the heart of the LED. The quality of the LED drive power directly determines the quality of the LED panel light.
First of all, in terms of structural design, the outdoor LED driving power must have strict waterproof function, otherwise, it cannot withstand the harsh environment of the outside world.
Secondly, the lightning protection function of LED drive power is also very important. It is inevitable to encounter thunderstorms when working outside. If the driving power supply has no lightning protection function, it will directly affect the life of LED lamps and increase the maintenance cost of lamps.
Finally, in the selection of raw materials, its reliability must meet its life requirements, and its functional characteristics must be good enough.
At present, the theoretical life of LED chips is about 100,000 hours. If the life of components in the industry is to be matched with it, the selection of key components must be verified and managed by perfect DMT and DVT to ensure long life and product reliability requirements. Otherwise, If the life of the power supply is not enough, the life of the lamp will not be realized.
The above is the whole content of LED panel lights brought to you by Xinjielighting, I hope the above content will be helpful to you, if you need to buy LED panel lights, LED tubes and other products, please contact us, we are a professional LED lighting manufacturer , The product quality is guaranteed and the price is reasonable.
For more information on LED panel lights, please refer to the following:
How does LED panel light work?
Five advantages of LED panel light!
