Causes of LED light decay-EEWORLD

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LED light attenuation is the signal attenuation during transmission.
1310 optical fiber generally attenuates by 0.4db/km

There are two main factors for LED light decay:

1. Quality issues of LED products themselves:

1. The chip used is not good and the brightness decays quickly.

2. There are defects in the production process. The chip heat dissipation cannot be well derived from the PIN pin, resulting in excessively high chip temperature and increased chip attenuation.

2. Conditions of use:

1. LED is driven by constant current, and some LEDs are driven by voltage, which causes the LED to attenuate.

2. The driving current is greater than the rated driving condition.

In fact, there are many reasons that lead to LED light decay, the most critical one is the "heat" problem. Here are some of my opinions.

Thermal resistance of the chip itself

The influence of silver glue

Heat dissipation effect of substrate

Including colloids and gold wires, etc. are somewhat affected

Keywords：LED Reference address：Causes of LED light decay

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