1. Influence of temperature on product life
Any products in the service life of the period and only under the condition of appropriate work failure rate is low, the LED display as an integration of electronic products, it is mainly composed of even have electronic components and other components of the control panel, switching power supply, light-emitting devices, and the life of the all these all have close relationship with temperature. If the actual working temperature exceeds the scope of the product, it will not only shorten the life, but also the product itself will be seriously damaged.
2. The effect of dust on product life
To maximize the average life of LED displays, the threat of dust cannot be ignored. Dust in the larger environment, work, because the PCB adsorption dust, the dust deposition will affect the heat dissipation of electronic components, the temperature rise will lead to a component, and thermal stability decline and even produce leakage, serious when lead to burn out. In addition, dust also absorbs moisture, corrodes electronic circuits and causes short circuit faults. The dust volume is small, but the harm to the product is not underestimated. Therefore, regular cleaning is necessary to reduce the probability of failure. When cleaning the inner dust of the display screen, be sure to disconnect the power and operate carefully.
3. The influence of moisture on product life
While almost all LED displays can work in 95% humidity, humidity is an important factor affecting product life. Wet gas will be through the encapsulation materials and components of the joint surface to the interior of the IC devices, oxidation corrosion caused by internal circuit breakers, and into the group of the high temperature in the process of welding within the IC wet gas heat expansion pressure, make plastic separation from inside the box on the chip or pin (layer), line stringing damage, chip damage, internal cracks and extends to the crack on the surface of the element, element to bulge and even burst, also known as "popcorn", this will lead to assembly parts repair even scrapped. What is more important is that the invisible and latent defects are incorporated into the product, causing problems in the reliability of the product. The reliability improvement method of wet environment includes the use of moisture-proof material, dehumidifier, protective coating cover and so on.
4. The effect of corrosive gases on product life
Humidity and salt air environment can cause the degradation of system performance, because they will intensify the corrosion effect of metal parts, also beneficial to the primary element, especially when no similar metal contact. Another harmful effect of moisture vapor and saline air is the formation of membranes that cause the insulation and dielectric properties of these materials on the surface of nonmetal parts to form a leak pathway. The absorption of moisture by insulating materials can also increase the volume conductivity and dissipation coefficient of the material. The reliability improvement methods for humid and salty air environments include air-tight seal, moisture-proof material, dehumidifier, protective coating/cover, and reduced use of non-homogeneous metals.
5. Effects of electromagnetic radiation on product life
The interference of rf radiation to electronic systems generally comes from two sources. One way is the electrical noise interference of the radiation field directly into the system. Experiments show that the strong on the spot to 5 v/m when system is bound to go wrong, the value of electromagnetic interference is enough to change the CPU program counter (PC), the microcomputer wrongly "jump out" are executable program, especially for small signal circuit. The storage device can not function properly when the field intensity is 15V/m. Another way of radiofrequency is through power supply. The external transmission line is equivalent to receiving the antenna, introducing the system, which can burn the power of the system itself when the interference is serious.