Mar. 10, 2020
The LED full-color screen is easy to control. It can display any content that needs to be played anytime and anywhere. Many users choose it. The LED full-color screen is also a very frequently used electronic tool. If the maintenance is not in place, there will be many problems. Today, Outdoor Sport LED Screen Supplier analyzes the cause of the fault for the partial display of the LED full color screen.
1. Carbonization:
Based on experience, the material defects of the six raw materials of outdoor LED full-color screen light sources (chips, brackets, die-bonding adhesives, bonding wires, phosphors, and encapsulants) and three major packaging processes (solid-crystal, wire bonding, and potting) All of the process defects may cause the light source to generate extremely high temperatures, causing the light source to be partially or entirely black, and the light source to be carbonized. LED lamp beads have an unreasonable heat dissipation design, a low thermal conductivity of the heat dissipation material, an unreasonable power supply design, and too many defects in reflow soldering. Therefore, when the cause of the initial diagnosis of the blackening of the light source is carbonization, customers are advised to follow the failure analysis route of LED full-color screen light sources or lamp beads, dissect the light source / lamp beads, and find out the source of the defect or high thermal resistance.
2.Vulcanization, chlorination, bromination:
The silver-plated layer on the LED full-color screen bracket will produce silver sulfide when it comes into contact with sulfur-containing gas, and it will produce light-sensitive silver halide when it comes into contact with acidic nitrogen-containing chlorine and bromine gas, which will cause the light source to become black and fail. Light source sulfur / chlorine / bromide may occur in every link of production, storage, aging, and use of LED full-color screen light sources and lamp beads. After the blackening of the light source is diagnosed as sulfur / chlorine / bromination, the customer should choose a specific sulfur removal scheme according to the link where sulfur / chlorine / bromination occurs.
Full Color LED Display
3. Chemical incompatibility:
Blackening of outdoor Full Color LED Display light sources may also be caused by chemical pollution. This blackening phenomenon often occurs in sealed lamp beads with little or no air flow. When it is diagnosed that the blackening of the light source is caused by a chemical compatibility problem, the customer will be advised to perform a chemical incompatibility check on the materials used in the lamp beads to find out materials that are incompatible with the light source. Frequently encountered problems. However, the blackening of the light source is only an appearance. Reasons such as sulfurization, chlorination, bromination, oxidation, carbonization, and chemical incompatibility will cause the phenomenon of blackening of the LED full-color screen light source.
4. Oxidation:
Under the environment of high temperature and high humidity, the LED full-color screen bead silver wire will easily react with oxygen to generate black silver oxide. The customer will be advised to further check the air-tightness of the LED full-color screen light source or lamp beads to eliminate moisture penetration way.
The above is the reason why the LED full color screen is not bright introduced by Indoor LED Screen Supplier. I hope it can help everyone.
