The structure of LED lamp is mainly divided into four parts: the structure of light distribution system, the structure of heat dissipation system, driving circuit and mechanical / protective mechanism. The light distribution system is composed of LED lamp board (light source) / heat conduction board, light equalizing cover / lamp shell and other structures. The heat dissipation system is composed of heat conduction plate (column), internal and external radiators and other structures; The driving power supply is composed of high-frequency constant current source and linear constant current source, and the input is AC. The mechanical / protective structure is composed of radiator / shell, lamp cap / insulating sleeve, homogenizer / lamp shell, etc.

Compared with electric light sources, LED lamps have great differences in luminous characteristics and structure. Led mainly has the following structural features:

1. Innovative light distribution design. By reasonably controlling the light distribution, the light spot is rectangular. According to different light distribution designs, the effective luminous angle is roughly divided into less than 180 degrees, between 180 degrees and 300 degrees and greater than 300 degrees, so as to ensure the ideal road brightness and uniform brightness, eliminate the glare of LED, give full play to the light energy utilization, and have no light pollution.

2. Integrated design of lens and lampshade. The lens array has the functions of focusing and protection at the same time, which avoids the repeated waste of light, reduces the light loss and simplifies the structure.

3. Integrated design of radiator and lamp housing. It fully ensures the heat dissipation effect and service life of LED, and fundamentally meets the needs of LED lamp structure and arbitrary design.

4. Modular integrated design. It can be arbitrarily combined into products with different power and brightness. Each module is an independent light source and can be switched. Local faults will not affect the whole, making maintenance simple.

5. Compact appearance. It effectively reduces the weight and increases the safety.

In addition to the above structural characteristics, LED lamps also have the following functional advantages: intelligent control of detection current, no bad glare, no light pollution, no high voltage, not easy to absorb dust, no time delay, no stroboscopic, withstand voltage impulse, strong seismic capacity, no infrared and ultraviolet radiation, high color rendering index, adjustable color temperature, energy conservation and environmental protection The average service life is more than 50000 hours, the input voltage is universal all over the world, has no pollution to the power grid, can be used in combination with solar cells, and has high luminous efficiency. However, at present, LED lamps still have many shortcomings, such as difficult heat dissipation and high price.