The luminous principle of the COB lamp strip is that when the voltage at both ends of the LED chip is greater than its threshold, the LED chip will be on and emit photons outward, that is, produce visible light. The luminous principle of LED chip mainly involves the knowledge of quantum mechanics, energy band theory and thermodynamics.

Specifically, when the semiconductor material in the LED chip is excited by the outside world, it produces free electrons and hole pairs, which move and compound in the band structure, and when the electrons and holes are combined, energy is released and accompanied by the emission of light. The wavelength (color) of light is related to the semiconductor material, and different materials correspond to different wavelengths.

In addition, the luminescence of the LED chip is also affected by factors such as current and temperature. When the current added to both ends of the LED chip is larger, the brightness of the LED chip will also increase. At the same time, when the LED chip works at high temperatures, its performance and life will be affected, so heat dissipation measures need to be taken to reduce the temperature of the LED chip.

Finally, the luminous principle of the LED strip needs to take into account the impact of packaging technology. COB light belt uses COB technology to integrate multiple LED chips on a substrate, and forms a whole after packaging. This packaging method can improve the LED brightness, color reproduction and light uniformity and other performance indicators.