Structural analysis of commercial LED lamps. Do you know all the functions of each component?

Today, seeposh will "dissect" the commercial LED lamps with you to understand what functions each component has? What are the advantages and disadvantages of common optical devices.
Today, seeposh will "dissect" the commercial LED lamps with you to understand what functions each component has? What are the advantages and disadvantages of common optical devices.

1. LED chip and power drive
The light source of LED lamp is chip, which is a solid state semiconductor device, also known as LED light-emitting chip, and is the core component of LED lamp. With the rapid development of LED technology and the gradual improvement of LED luminous efficiency, the application of LED will be more and more extensive. Whether it is high-power LED chips for key lighting and overall lighting, or low-power LED chips for decorative lighting and some simple auxiliary lighting, the luminous efficiency of LED has achieved a great breakthrough.

The price and quality of LED chips of different brands vary greatly. Then why should seeposh commercial lamps choose the right chip?
This determines whether a commercial lamp can have the advantages of high luminous efficiency, high color rendering index and low heat. A good light usually depends on the chip. Poor quality chips will inevitably affect the life of lamps.


2. Drive power

LED driving power supply is a power converter that converts power supply into specific voltage and current to drive LED light. Generally, the input of LED driving power supply includes high-voltage power frequency AC (i.e. 220V mains power), low-voltage DC, high-voltage DC, low-voltage high-frequency AC (such as the output of electronic voltage converter), etc.
The driving power supply is also the key factor that dominates the life of commercial lamps. Many stores' lamps seem to have "no reason" in their own lamps after being scrapped, but the problem may be the driving power supply. The electrolyte inside the low-quality drive power supply will continuously volatilize in large quantities as time goes on and is affected by heat energy, leading to premature aging or even damage of lamps.
At present, the mainstream LED lighting driving power supply on the market has broken this barrier very well. It uses an external power supply, which is separated from the lamp body, and is resistant to high temperature. It can electrolyze at 105 ℃ (it can work continuously at 105 ℃ for 8000 hours). Its service life is 4 times that of the ordinary power supply. With such a reliable driving power supply, you really don't have to worry about the lamps that you buy will break down quickly.

Optical structure lens, reflector cup and heat dissipation structure

3. Lens

LED lens is divided into primary lens and secondary lens. By default, the term "lens" refers to secondary lens, which is closely combined with LED lamp beads, COB and other light sources. According to different requirements, different lenses can be used to achieve the desired optical effect.
At present, the main material of LED lens on the market is PMMA, which has good plasticity and high light transmittance (up to 93%), but its disadvantage is low temperature resistance, only about 90 degrees. The main secondary lens on the market is generally of internal total reflection design (TIR for short). The lens is designed with penetrating focusing in the front, and the conical surface can collect and reflect all the side lights. The overlapping of these two kinds of lights can achieve perfect light utilization and beautiful spot effect. The efficiency of TIR lens can reach more than 90%, and it is mainly used in small angle lamps (beam angle<60 °), such as spotlights and ceiling lamps.

▲ Lens light type


4. Reflector cup
Generally, the luminous angle of LED light source is about 120 °. In order to achieve the desired optical effect, the lamp sometimes uses a reflector to control the light distance, light area, and spot effect.
The computer modeling is used to simulate the luminous angle of the light source of the reflector cup and the spatial structure of the LED reflector, track the refraction track of the light, and adjust the technical parameters of the curvature of the light cup to achieve the best light intensity distribution of the flashlight reflector and the functional requirements of the lamp cup for various beam angles, which greatly improves the light efficiency of the LED reflector cup and reduces the possibility of astigmatism and glare.

 Reflector cup material
Metal reflector cup: It needs to be punched and polished, and has deformation memory. It has the advantages of low cost, temperature resistance, and is commonly used for lamps with low-grade lighting requirements.
Plastic reflector cup: It can be demoulded at one time, with high optical accuracy, invisible variable memory and moderate cost. It is commonly used for lamps with medium and high grade lighting requirements with low temperature.

▲ Light type of reflector cup


5. Radiator:
In the process of continuous opening of commercial lamps, a large amount of heat will be generated. If it is not discharged in time, the heat energy accumulated in the lamp body will damage LED chips and even various parts, causing light failure and shortening the service life. This is the task that the radiator needs to solve - timely heat removal.

At present, the radiators with ideal heat dissipation effect on the market are mainly "die-casting" (i.e., radiators pressed by molds) and cold forging integrated radiators (made of aluminum cold pressing with higher pressure, which is a new generation of high-quality heat dissipation technology).
In terms of heat dissipation performance, it is 30% higher than the traditional split radiator (seamless connection between the aluminum substrate and the radiator, and greatly improved thermal conductivity), which can ensure a longer life of LED lamps.

▲ LED radiator
Secondly, under certain environmental conditions, the heat dissipation resistance mainly depends on the heat dissipation area of the radiator and the radiation coefficient of the radiator surface material. The larger the heat dissipation area, the higher the radiation coefficient, the smaller the heat dissipation resistance, and the better the heat dissipation effect.

 If you have any questions about commercial lighting , please consult seeposh.

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