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Brief introduction to the failure analysis of LED linear lamp manufacturers

2021-08-23


  The LED linear light is controlled by the built-in microchip. In small engineering applications, it can be used without a controller. It can achieve dynamic effects such as gradation, jump, color flashing, random flashing, and gradual alternation. It can also be achieved through DMX control. Chase, scan and other effects.

    The failure mode of LED linear lamp products has the following aspects in current observations: open circuit failure, light loss and degradation failure. The former is caused by a break in the circuit leading to the complete failure of the LED linear lamp product, and the latter is caused by the passive recombination of the LED linear lamp product, resulting in a decrease in light conversion efficiency and a reduction in luminous flux. As for the deterioration failure, the product fails due to the aging of the product during long-term use.


   LED failure analysis is the process of analyzing failed LEDs. In order to understand the cause of the equipment failure, it is necessary to conduct a comprehensive study on each component of the LED outdoor line lamp of the LED line lamp brand. First of all, the failure time of LED linear lights should be analyzed. For components that are close to the design life, decommissioning will not be analyzed. Other components will consider whether to perform photoelectric parameter test, and then perform appearance test in case of open circuit failure. If the open circuit fails, an optical microscope, metallurgical microscope, etc. will be used for visual inspection to analyze possible defects. If the pin and bond fail, the electron probe microscope will be used to analyze the cause of the pin failure. Perform infrared testing on components to find internal defects. A fixed-point analysis test is performed on the defective part to determine the cause of the failure.

    In the failure analysis process of LED linear lights, it is necessary to pay attention to the interconnection between various failure modes. In the analysis process, it is necessary to identify, combine the failure time and application environment, and find an appropriate distinguishing method.

    The LED linear lights produced by LED linear light manufacturers will generate a certain amount of heat during work. Different materials have different thermal expansion coefficients. After long-term use, gaps will be created at the joints of different materials and air intake; when used in an environment with relatively high humidity When the temperature inside and outside the lampshade is different, the heated gas inside the lampshade will be cold in the lampshade. If the gas contains more water vapor at this time, water mist and water droplets will be generated. After the lamp continues to be lit for a period of time, this The phenomenon will disappear. Therefore, the humid environment is also a factor that affects the life of the LED linear lamp.