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A Few Key Technologies for Making High Quality LED Lighting Products


Want to do a few key parts of a led lighting product can not be ignored, popular is said to be light distribution, structure, electronics, and light distribution, structure, electronic terminology expressed as: optical properties, thermal properties, electrical properties. At the same time, the light distribution is particularly important. If you don't understand the light distribution, you can't do LED lighting.

Optical performance (light distribution): The optical performance of LEDs mainly involves performance requirements in terms of spectrum, luminosity and chromaticity. According to the newly established industry standard "Semiconductor LED Test Method", there are mainly illuminating peak wavelength, spectral radiance bandwidth, axial illuminance intensity angle, luminous flux, radiant flux, luminous efficiency, chromaticity coordinates, correlated color temperature, color purity and main Wavelength, color rendering index and other parameters. LEDs for display are mainly visual and visual effects, so there is no requirement for the relevant color rendering index. For white LEDs for illumination, color temperature, color rendering index and illuminance are particularly important, and it is an important indicator of lighting atmosphere and effect. Color purity and dominant wavelength are generally not required.

At present, the mainstream practice in the global LED industry is to distribute the light when the LED chip is formed into a light source or a light source module, and then the light is distributed when the light is made, so that the conventional light source is used because the conventional light source is 360° light. . 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.

Now the most advanced scientific method is to do the light distribution on the chip package, and to derive the light of the chip at a time to maintain the maximum light output, so that the light loss rate is only 5%-10%. As the 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. You know, 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. Therefore, the data in the previous period must be accurate and the simulation of the back end can be correct.

Thermal performance (structure): The LED luminous efficiency and power supply for lighting is one of the key factors in the LED industry. At the same time, the PN junction temperature of the LED and the heat dissipation problem 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, that is, to stand by the designer. From the perspective of thinking, we must consider the product from the perspective of the user.

At present, upstream dragon companies, such as CREE, can achieve a chip light efficiency of 130-150 lm / W. However, the LED junction temperature directly affects the LED light extraction efficiency, device lifetime, reliability, and emission wavelength. Keeping the LED junction temperature within the allowable range is a key factor in the research of high-power LED chip fabrication, device packaging and device applications, especially the core issues that must be addressed in LED device packaging and device application design.

Nowadays, the mainstream application technology materials are packaged with aluminum substrates, but the chip heat dissipation and light conversion efficiency of the aluminum substrate package have technical core bottlenecks, which cannot effectively control the junction temperature and 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 increases 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 amount of photons. The output, its minimum requirements 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 description, 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, Mao 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.

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 driver is also important. 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 LED driver power supply (electronic design) is the basis for supporting the development of LED. LED driver power supply is more energy-saving, efficient, and has a longer life than traditional lamps, so that LED can truly save energy and reduce consumption and promote industrial development. The heat dissipation (structural design) of LEDs is the key to determining the maintenance of light flux, the safety of components and equipment. LED light distribution (optical design) is a symbol of the technical level of the industry. Mastering the above 3 technologies, LED lighting is simple.

Yiwu Fuwei e-commerce firm (IACS Co., Limited) is a very professional Led manufacturer who produces high quality outdoor led light. Our popular products are solar led lights, UFO lights, underwater lights and so on. If you have any question about the led product, please feel free to contact us.