Photoelectric Solar Studs
used in tunnels need to be placed for a long time, and the service life of Solar Studs
should be more than five years. What factors affect the brightness attenuation of electro-optic Solar Studs
? There are three main factors: the quality of chips inside LED Solar Studs and the quality of LED Solar Studs
. Operating current and heat dissipation of LED Solar Studs.
(1) Effect of LED Solar Studs
chip quality on brightness attenuation
The lifespan of LED Solar Studs mainly depends on the quality of the chip. Like other light sources, the brightness of LED Solar Studs
will gradually decay with the increase of working time, especially in the field of white LEDs. In the current LED Solar Studs market, there are also targeted Depending on the direction of application, different LEDs are manufactured, and the quality is uneven, and the price varies greatly. Therefore, it is very important to determine the quality of LED Solar Studs
for the manufacture of transportation products.
The advantage of high-quality LED Solar Studs is that the service life is very long, and the service life can reach 100,000 hours. If calculated on a 24-hour basis, an electro-optic sign with a high-quality white LED light source can be used for more than 10 years, and the light will shine after 10 years of work. The brightness can still reach 45% of the original.
When choosing a supplier of LED Solar Studs
, you should be very cautious. After a long period of performance testing, you must determine a supplier with high brightness, low light decay, stability, and consistency in each parameter in the batch.
(2) The influence of the driving circuit on the brightness attenuation of LED Solar Studs
LEDs must work under constant current conditions in order to ensure the long life of LED Solar Studs
and the consistency of brightness and chromaticity. 1. LED is a semiconductor device with sensitive characteristics. If the current flowing through the LED exceeds its rated current, the brightness and color of the LED will change immediately, and its life will rapidly decay or even burn out.
2. Obtain the expected brightness requirements and ensure the consistency of brightness and chromaticity of each LED Solar Studs
. 3. It can effectively avoid lightning strikes, power grid surges, over-current, and over-voltage protection.
To ensure long life and high efficiency of LED, the requirements for its driving power are almost strict. Unlike ordinary incandescent bulbs, LED Solar Studs
can be directly connected to 220V AC mains. LED is driven by a low voltage of 2 to 3 volts, and a conversion circuit must be designed. LED products for different purposes must be equipped with different power adapters. In the international market, foreign customers have very high requirements on the efficiency conversion, effective power, constant current accuracy, power supply life, and electromagnetic compatibility of LED drive power supplies. To design a good power supply, these factors must be considered comprehensively, because the power supply in the entire LED Solar The role in Studs products is as important as the human heart.
(3) The working temperature has a great influence on the life of LED, and if it is not handled properly, it will affect the life of LED Solar Studs
The heat dissipation of LED is very important, and the luminous efficiency of LED Solar Studs
decreases with the increase of LED temperature. Although the electro-optical signs use low-power LEDs, the heat generated by multiple LEDs can not be ignored if they are combined to work for a long time. When designing and manufacturing electro-optic signs, fully combine the electrical and physical characteristics of LEDs, and rationally design the structure of the product. The LED array is evenly distributed on both sides of the light guide plate, and the frame is made of aluminum alloy I-shaped grooves, which can not only effectively dissipate heat for LED Solar Studs
, but also enhance the mechanical strength of the signboard, and provide support for fixing the signboard. The casing of the drive power supply is also made of aluminum alloy, which can be placed on the sign board or fixed on the wall. These are good heat treatment measures.