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Factors that cause the LED Light source to turn black
2. Oxidation
In a high temperature and high humidity environment, silver will easily react with oxygen and produce black silver oxide. After Xinqin Lighting confirms that the blackening of the light source is caused by the oxidation of the silver plating layer, it will advise customers to further check the air tightness of the light source and lamps to eliminate the path of moisture penetration Illumination LED.
3. Carbonization
In terms of experience, the material shortcomings of the six raw materials (chips, brackets, die-bonding glue, bonding wires, phosphors, packaging glue) of the LED light bar light source and the three major packaging processes (die-fixing, wire bonding, and potting) Disadvantages of the process may cause the light source to generate extremely high temperature, resulting in partial or overall blackening of the light source and carbonization of the light source Light Emitting Diode Lamp Beads. Unreasonable heat dissipation planning of LED lamps, low thermal conductivity of heat dissipation materials, unreasonable Power Supply planning, and too many defects in reflow soldering will also cause carbonization of the light source. Therefore, when Xinqin Lighting starts to determine that the cause of the blackening of the light source is carbonization, it will advise customers to follow the path of the failure analysis of the LED light source or lamp, and analyze the light source/lamp to find out the defect or the origin of high thermal resistance.