Many people think that high -power LEDs have no calories, but high -power LEDs are calorie. During the process of using a large amount of heat. Many people who have just used high -power LEDs do not understand the problem of heat. How to effectively solve it, making product reliability the main problem. Then talk about related issues below.

Under the front voltage, the electrons obtain energy from the power supply. Driven by the electric field, the electrical field that overcome the PN knot is overcome from the N area to the P area. Because the free electron that drifts to the P area has energy higher than the Pedicated electron electronics, the electrons return to the low energy state during composite, and the excess energy is released in the form of photons. The wavelength of the photon is related to EG. It can be seen that the luminous area is mainly near the PN knot, and the light is due to the result of the composite of the electron and the cave. In a semiconductor diode, electrons will encounter resistance during all journeys entering the semiconductor area to leaving the semiconductor area.

In principle, the physical structure of the semiconductor diode is simply in principle. In principle, the electrons emitted by the physical structure of the semiconductor diode are equal to the electrons that return to the positive electrode. Ordinary diode, the compound of the electron -ground point is that due to the factors of the energy -level difference EG, the released photon spectrum is not within the visible light range.

Electronics consumes power due to the existence of resistance inside the diode. The consumed power conforms to the basic law of electronic science: P = I2 R = I2 (RN ++ RP) + IVTH formula: RN is the opening voltage of the PN junction. For: Q = PT type: T is the time for diode to power.

In essence, LED is still a semiconductor diode. Therefore, when LED is working, its work process is in line with the above narrative. The electricity it consumes is: P LED = U LED × I LED: U LED is the positive voltage at both ends of the LED light source. I LED is the electric power that flows over the LED. LED × T type: T is the power -on time.

In fact, the energy released when the electron is compounded in the P Zone and the cave is not directly provided by the external power supply, but because when the electron is in the N area, when there is no external electric field, its energy level is more than the P area P area. Electronic energy level is higher than EG. When it reaches area P and compounds with acupoints to become a price electron in area P, it will release so many energy. The size of the EG is determined by the material itself, which has nothing to do with the external electric field. The effect of external power on electrons is to promote the directional movement and overcome the PN knot.

The heat production of LED has nothing to do with the light efficiency; there is no electrical power generation of a few percent, and the remaining a few percent of the electrical power generates heat. Through the understanding of the concept of high -power LED heat, the concept of thermal resistance, the concept of temperature, and the derivation of the theoretical formula, and the heat resistance measurement, we can study the actual packaging design, evaluation and product application of high -power LEDs. It should be noted that heat management is a key issue at the present stage where the luminous efficiency of LED products is not high. It is fundamentally improved to reduce the production of thermal energy from the bottom of the kettle.It is necessary to make technologies for chip manufacturing, LED packaging and application product development.