It is not unclear to think about the most critical parts of an LED lighting product. Popularly speaking, it is light distribution, structure, and electronics. The terms of light distribution, structure, and electronics are expressed as: optical performance, thermal performance, and electrical performance. At the same time, the light distribution is particularly important. If you don't understand the light distribution, you can't do LED lighting to determine which LED package structure to use. Next, consider how to adapt to these package forms. There are not many opportunities for us to choose. The optical structure is Built on top of these packages; many of our ideas don't work very well. Thermal performance (structure) The LED luminous 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 practicality, that is, to stand by the designer. From the perspective of the user, we must consider the product from the perspective of the user... 1. The shortest heat is transmitted to the path to reduce the heat conduction resistance; 2. Increase the mutual conduction area and increase the heat transfer rate; 3. Reasonable calculation of the design heat dissipation area; 4. Effective use of heat capacity effects. 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 Single Led,Monochrome Led Display,Small Single Led Light,Single Led Light ShenZhen Megagem Tech Co.,Ltd , https://www.megleddisplay.com
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 that must be studied in every aspect 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.