When electrical energy is converted into light energy, part of the electrical energy will be converted into heat to generate heat for the LED injection molding module. This heat will shorten the life of the LED injection molding module, which will increase our cost. Today we will further explain this phenomenon. .

Specifically, the junction temperature of the LED lens lamp is caused by two factors:

The internal quantum efficiency of the LED lens lamp is not high, that is, when the electrons and holes are recombined, 100% of photons cannot be generated, which is usually referred to as "current leakage", which reduces the recombination rate of carriers in the PN region. The leakage current multiplied by the voltage is the power of this part, which is converted into heat energy, but this part does not account for the main component, because the internal photon efficiency is now close to 90%.

The photons generated inside the LED lens lamp cannot all be emitted to the outside of the chip and finally converted into heat. This part is the main part, because the current called external quantum efficiency is only about 30%, and most of it is converted into heat.

As mentioned above, although the light efficiency of incandescent lamps is very low, only about 151m/W, but it converts almost all the electrical energy into light energy and radiates it out, because most of the radiant energy is infrared, so the light efficiency is very low. , but avoids the problem of heat dissipation. This is the difference between LED lens lamps and incandescent lamps.