The Development Of LED In Emergency Lights

We can see emergency lights in many places in our lives, so what is LED light attenuation?

Now let's introduce it to you.

1. What is LED light attenuation?

The optical attenuation of LED products is the weakening of the signal of light in transmission. However, LED products made by manufacturers all over the world have different optical attenuation levels. High-power LED products also have optical attenuation, which is directly related to the temperature, and the key is determined by the chip, fluorescent powder and packaging process.

Now, the white LED on the market its light decay may be one of the main problems in the march towards civilian lighting.

2. Several factors affecting LED light attenuation

1.LED product quality issues:

The LED chip used is of poor quality and has a fast attenuation rate of brightness.

The production process is defective, and the heat dissipation of THE LED chip cannot be well exported from the PIN, resulting in the high temperature of the LED chip, which aggravates the chip loss.

3. Use standards:

LED is driven by constant current. Some LED USES voltage drive to attenuate the LED.

The drive current is higher than the rated drive standard.

In fact, there are many reasons for LED product light decline, the core is heat dissipation, even if many manufacturers do not pay special attention to heat dissipation in secondary products, but those secondary LED products for a long time to use, the degree of light decline will be higher than the importance of heat dissipation LED products.

The thermal resistance of the LED chip itself, the influence of the silver glue, the heat dissipation efficiency of the substrate, as well as its colloids and gold wires are also related to the light attenuation.

One of the major issues facing white leds today is longevity, because white leds tend to be very expensive. To gain a foothold in the lighting market and allow users to save money as well as power, they must be able to make up for the high price of a fixture with long life and reduced electricity costs.

For now, the longevity of white leds makes it impossible to guarantee this.

From the normal use of LED, the key element that endangers the life of LED is heat dissipation.

The sources of heat include the Joule heat formed by the normal resistance of the material in the current, the heat caused by the PN junction, the Joule heat formed by the parasitic resistance generated in the process, and the heat caused by the attraction of light.

The accumulation of heat causes the temperature to rise, and the rise of temperature causes the performance of the chip to decline, decay, aging and denaturation.

The above is what is called LED light decline in emergency lights, fire emergency lights manufacturers right pull technology styles many worthy of your choice, worthy of your expectations.