LED Beam Moving Head Light
Analysis of the reasons affecting the light decay of LED stage light
Jan 11 , 2021

LED is known as the fourth-generation lighting source or green light source. It has the characteristics of energy saving, environmental protection, long life, small size, etc., and is increasingly pursued by all walks of life. It is widely used in various advertising media, stadiums, stage backgrounds, municipal engineering and other fields

一.What is the LED light

LED is the abbreviation of light emitting diode (light emitting diode). Its basic structure is a chip of electroluminescent semiconductor material. Because it is very firm and not easy to fall off, the LED light has good shock resistance

二.working principle

LED (Light Emitting Diode) is a light-emitting diode, a solid-state semiconductor device that can convert electrical energy into visible light. The characteristics of LED are very obvious such as long life, high light efficiency, low radiation and low power consumption.

三.LED light decay problem

The problem of LED light decay is a problem that LED lights have to face. If you observe carefully, you will find that sometimes the LED will have continuous light decay, and the light decay seriously affects the use of LED lamps. What causes the light decay of LED?

(1)There are two main factors of LED light decay:

1 .The quality of LED products themselves:

2 .The LED chip used is not of good physical condition, and the brightness decays quickly, causing more serious quality light decay problems.

3.There are defects in the production process, and the heat dissipation of the LED chip cannot be well derived from the PIN pin, which causes the high temperature of the LED chip to increase the chip attenuation.

(2)LED light decay caused by quality problems is irreversible

1. Use conditions:

2. The LED is driven by constant current, and some LEDs are driven by voltage, which makes the LED excessive attenuation.

3. The driving current is more than the rated driving conditions.

In fact, there are many reasons for the light decay of LED products, but the most critical one is the problem of heat dissipation

The higher the temperature, the light decay of the LED chip is also significantly increased. The picture shows the light decay curve of Cree company's LED light source. It can be seen from the figure that the light decay of the LED is closely related to its junction temperature. The so-called junction temperature is the temperature of the semiconductor PN junction. The higher the junction temperature, the earlier the light decay of the LED light source, that is, the shorter the lifetime.

四.Main factors affecting light decay

First of all, what kind of LED white light to choose.This is very important. The quality of LED white light can be said to be a very important factor.

Secondly, the working environment temperature of LED lamp beads.

Thirdly, the working electrical parameter design of LED lamp beads.

In summary, the conditions that affect the life of LED lights: heat dissipation, operating temperature, drive power and drive circuit.

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