First, the main components of the LED panel light
1. Panel light aluminum frame:
It is the main channel for LED heat dissipation. It has simple and elegant appearance. It can use ZY0907. It has low cost for mold stamping and low processing cost. The IP grade of die-cast aluminum frame can be higher, the surface texture is good, and the overall appearance is beautiful. Higher.
2. LED light source:
Usually, the LED lamp bead uses 3528, and some people use 3014 and 5050. The 3014 and 5050 have low cost and the light effect is slightly worse. The key is that the design of the light guiding dot is difficult. 3528 high efficiency and good versatility.
3. LED light guide:
The side LED light is refracted through the dots to evenly lead the light from the front side. The light guide plate is the key point for the quality control of the LED panel light. The design of the dot is not good, and the overall light effect seen is very poor. Generally, there will be darkness on both sides of the middle light, or there may be a bright band at the entrance light, or a partial dark area may be visible, or the brightness may be inconsistent at different angles. To improve the light effect of the light guide plate mainly depends on the design of the mesh point, followed by the quality of the plate, but there is no need to superstitiously the first-line brand plate, the light transmittance between the qualified plates is usually almost the same. The general small LED lamp factory is directly used to buy a common light guide plate, so there is no need to re-sample the design, and the public version used by many manufacturers is usually qualified.
4. LED diffuser:
The light of the light guide plate is evenly extracted, and the function of the fuzzy dot can also be played. The diffuser board generally uses Acrylic 2.0 sheet or PC material, which is almost PS material. Acrylic has lower cost and light transmittance higher than PC. Acrylic brittle anti-aging performance is weak, PC price is slightly expensive, but anti-aging performance Strong. The diffuser plate cannot see the dots after being mounted, and the light transmittance is about 90%. The acrylic transmittance is 92%, the PC is 88%, and the PS is about 80%. You can choose the diffuser material according to your needs. At present, most manufacturers use acrylic materials.
5. Reflective paper:
Reflecting the residual light on the back of the light guide to improve the light efficiency, generally RW250.
6. Rear cover:
The main function is to seal the LED panel light, generally using 1060 aluminum, which can also play a role in heat dissipation.
7. Drive power:
At present, there are two kinds of LED driving power sources. One is to use constant current power supply. This mode has high efficiency, PF value is up to 0.95, and cost-effective. Secondly, constant voltage with constant current power supply is used, and the performance is stable, but the efficiency is low and the cost is high. This kind of power supply is mainly for export, the other party requires certification requirements, and a safe power supply is required. In fact, it is safe to use a constant current power supply in the home because it is difficult for the user to access the power supply, and the lamp body itself uses a safe low voltage power supply.
8. Install the pendant:
Suspension wires, mounting brackets, etc. are used to mount fixed accessories.
From the perspective of quality control, it is most effective to increase the light efficiency in the LED light source and the LED light guide plate. From the perspective of market sales, the additional money is spent on the aluminum frame cover pendant. Can improve product quality.
Second, the three key technologies of LED panel lights
Optical performance (light distribution): The optical performance of LED panel lamps mainly involves performance requirements in terms of luminosity, spectrum and chromaticity. According to the latest industry standard "Semiconductor LED Test Method", there are mainly illuminating peak wavelength, spectral radiance bandwidth, axial illuminating intensity angle, luminous flux, radiant flux, luminous efficiency, chromaticity coordinates, correlated color temperature, color purity and dominant wavelength, Color rendering index and other parameters. LED panel lamps commonly used white LEDs, color temperature, color rendering index and illuminance are particularly important, it is an important indicator of lighting atmosphere and effect, and color purity and dominant wavelength are generally not required.
The mainstream practice in the LED industry is to distribute the light when the LED chip is formed into a light source or a light source module, and then use the original light source because the conventional light source is 360°. If you want to direct light to the application, Philips' traditional lamps are the best, and the light loss is 40%. The optical parameters of the lamps used by many domestic LED downstream manufacturers are actually the optical parameters of the chip or the light source, not the optical index parameters of the overall luminaire.
How to better improve the performance of light, the world's latest technology is to do light distribution on the chip package, once the light of the chip is derived to maintain the maximum light output, so the light loss rate is only 5% -10%. As technology continues to improve, the light loss rate will be lower and lower, and the light efficiency of the light source will become higher and higher. The same light source luminaires do not need to be equipped with light distribution, and the relative luminaire efficiency will be greatly improved, making it more widely used in functional lighting, forming a considerable market channel. Therefore, a good LED supplier is our top priority. We don't have to spend a lot of money to study how our LEDs go to light distribution. It doesn't take a lot of time and experience to let engineers use software to simulate. The easiest way is to Let LED white light suppliers cooperate. Be aware that if our engineers use software to simulate, the necessary actions are input and output. Input is the data import in the previous period, and the output is the result of the simulation. Then the data in the previous period must be accurate and the simulation of the back end can be correct.
Thermal performance (structure): LED lighting efficiency and power supply for lighting is one of the keys to the LED industry. At the same time, the PN junction temperature of the LED and the heat dissipation of the housing are particularly important. The greater the difference between the PN junction temperature and the lamp body temperature, the greater the thermal resistance, and the conversion of the light energy into thermal energy is consumed in vain, and the LED is damaged in severe cases. A good structural engineer should not only consider the structure of the luminaire and the thermal resistance of the LED, but also consider whether the shape of the luminaire is reasonable, fashionable, novel, and of course reliability, maintainability and practicability, both standing by the designer. From the perspective of thinking, we must consider the product from the perspective of the user.
The common technology today is to use aluminum substrate for packaging. The chip heat dissipation and light conversion efficiency of the aluminum substrate package have technical core bottlenecks, can not effectively control the junction temperature and stably maintain high power light output, and the application will be because the chip has higher luminous efficiency. The larger the area of ​​the aluminum substrate required, the greater the cost and the application volume, which is extremely inconvenient. So how to get out of this misunderstanding and open up new roads is the core feature of the new technology. Under the premise of maintaining low cost and passive heat dissipation, the high thermal conductivity medium is used to reduce the thermal resistance and reduce the PN junction temperature through the new device/lamp overall structure, so that the PN junction works within the allowable operating temperature and maintain the maximum photon. The minimum requirements for output are as follows: (1) ultra-low thermal resistance material, rapid heat dissipation overall structural technology;
(2) High thermal conductivity and anti-UV packaging technology;
(3) Applying low environmental stress structure technology;
(4) The overall thermal resistance is <20K/W, and the junction temperature is <80 degrees;
(5) The operating temperature of the LED light source lighting module is controlled below 65 °C.
Electrical performance (electronic): If a lighting fixture is likened to a girl, then the light is her connotation, structure is her appearance, electronics is her heart. (It’s always the beauty and fashion of beautiful women who attract people’s attention, as well as products.) If a person has no heart, there is no life. If the lamp has no electrons, it will not be a power source. A good driving power source can also determine the life of a product. Electronic standards and parameters are often much more complicated than structures, and early research and development efforts are also relatively large. The current technology trends and updates are changing with each passing day. Engineers have to spend a lot of energy to learn, absorb, disassemble and apply new technologies. The pre-planning of the electronic design, the mid-term implementation, and the formation of the later process need to form documents and form data. This is also the most cumbersome thing in the design. For example: a pre-plan of a power supply design, product introduction, standard specification basis, safety specification basis, electrical performance expectation value, process requirements, raw material evaluation, test methods, etc. must form a system file.
In the field of LED drive power, the development of Moso Power, which is now the industry leader, is full of legends. Out of the keen sense of the LED industry, Ma Shuo Power's head Gu Yongde led his team to invest in LED power supply in 2006. Today, Moso Power's world-leading technology has led the trend of intelligent driving of LED street lamps, and proposed to provide the most reliable intelligent driving solutions for LED street lamp manufacturers, which is another leading concept.
Third, LED drive power is powerful
As the core component of LED lights, LED power supply is like the heart of LED. The quality of LED drive power directly determines the quality of LED lamps.
First of all, in the structural design, the outdoor LED drive power supply must have strict waterproof function, otherwise, it can not withstand the harsh environment of the outside world.
Secondly, the lightning protection function of the LED drive power is also crucial. When the outside world is working, it is inevitable to encounter thunderstorms. If the driving power supply has no lightning protection function, it will directly affect the life of the LED lamps and increase the maintenance cost of the lamps.
Finally, in the selection of raw materials, its reliability must meet its life expectancy, and the functional characteristics need to be good enough.
At present, the theoretical life of LED chips is about 100,000 hours. If the industry components are matched, the selection of key components must be verified by DMT and DVT to ensure long life and product reliability requirements. Otherwise, The life of the power supply is not enough and the life of the lamp cannot be realized.
Therefore, the reliability of the LED driver power supply (electronic design) is the basis for supporting the development of LED. The LED driver power supply is more energy-saving, efficient, and has a longer life than the traditional lamps, so that the LED can truly save energy and reduce consumption and promote the development of the industry. Master the three major technologies of light performance, electrical performance and thermal performance of LED panel lights. After you purchase LED panel lights, you will be able to avoid the huge advantage. Buying cost-effective LED panel lights is Great possibility.
Edit: Cedar
Dongguan City Yuanyue Electronics Co.Ltd , https://www.yuanyueconnector.com