The P-N festival of semiconductor is the basic structure of LED lamp beads! Expand the experimental research on LED, and finally summarizes: When LED flows through the LED under normal work, the temperature of the PN section will gradually rise, so the phenomenon of evil will be called the knot temperature of LED lamp beads! The chip size of LED lamp beads is very small, so we can also call the chip temperature as knot temperature! There are several LED lamp beads that have a temperature knot temperature in the following light -emitting diodes:

Reason one:

There are many resistors in the motor structure of LED lamp beads. When the resistance is overlapped, it will form a series resistance of LED lamp beads! When the current flows over the PN section, at the same time, these resistance will also flow, resulting in scorched ear heat, and the chip knot temperature rises.

Reason two:

The PN section cannot be perfect, and the injection efficiency of LED lamp beads will not reach 100 %! This effect indicates that when LED lamp beads are working, the P and N areas will inject the charge to the other party. Under normal circumstances, the injecting of the latter type of charge will not produce the photoelectric effect, and it will consume it in the form of heat dissipation! Even if part of the charge is injected, all of them will become a light source. Some parts will be combined with the intercepted impurities or defects, and the heat will eventually form!

Reason three:

It has been proven by experiments that the limit of light efficiency is the main factor that leads to the formation of high -knitting temperature for LED lamp beads. At present, there are already advanced LED materials growth and electronic component manufacturing process. Instead of photovoltaic energy.

Because the material of the chip in the LED lamp beads has a high number of refraction coefficients compared to the surrounding price, most of the photons (90 % of the 90 %) inside the lamp beads cannot smoothly overflow the interface, but in The chip and ring interface generate the launch phenomenon. After multiple internal launch, it was eventually absorbed by the chip material or the bottom of the ingenuity, and the heat was vibrated with a lattice, which promoted the gradually increased temperature!

Finally, the heat dissipation ability of LED lamp beads is a key condition that determines its own temperature height! If the heat dissipation effect is good, the knot temperature will naturally decrease. If the heat dissipation ability is checked, the knot temperature will rise! Because ring glue is a low -thermal guide material, the possibility that the heat generated by the PN junction is almost zero through transparent epoxy to the environment.