The Cause of LED Lamp Bead Welding Process Dead Lamp

During the production process, some lamp beads are encountered in the phenomenon that there is a phenomenon that there is a phenomenon of one, a string, and several string of lamp beads when testing. The welding method can be divided into electric iron welding, heating platform welding and reflux welding, etc.: A, the most common electric iron welding, such as samples and maintenance. Because most existing manufacturers are for saving costs, most of the purchased electric iron soldiers are mostly. Unqualified products are mostly poorly grounded, and there are leakage. This is equivalent to forming a loop formed by the leakage soldering iron tip-welding LED-human body-the earth, which means dozens of times- Hundreds of times the voltage that the lamp beaded was added to the LED lamp bead, and it instantly burned it out. Note: The situation of the static electric band will be more serious, because when the human body is connected to the electrostatic belt, the resistance to the ground is smaller, and the current from the human body to the lamp beads will be larger. There are still so many lamp beads damaged problems. B, the dead lamp caused by the heating platform welded. Due to the continuous lamp sample list, most companies in order to meet the needs of small batch and sample lists, due to the low cost of equipment, simple structure and operation, the heating platform has become the best production tool However, due to the use environment (for example: there is a problem that the temperature in the place with a fan) and the degree of practice and the control of welding operators and the control of welding speeds have become a major problem of dead lamps. In addition, heating Platform equipment grounding situation. C, reflux welding, generally this welding method is the most reliable production method, suitable for large quantities of production and processing. If the operation is improper, it will cause more severe dead lights, such as unreasonable temperature adjustment, poor machine grounding, etc. 2. Improper storage causes dead lamps: This kind of problem is the most common. Since the problem of moisture preventing the moisture -proof after the package is opened, the seal of the lamp beads mostly uses silicone materials. According to a certain water absorption characteristics, the lamp bead paste after the moisture is posted by the moisture bead paste. After the board, the silicone of the silicone after the high -temperature welding process will be hot and contracted. The golden thread, chip, and brackets will be deformed and the golden thread will be broken. The lighting point will be generated. In the environment, the storage temperature is -40 C- 100 C, and the relative humidity is below 85%; it is better to use LED within 3 months under its original packaging conditions to avoid rust of the bracket; when the LED packaging bag is opened, the packaging bag is opened. After, use it as soon as possible. At this time, the storage temperature is 5 -30 , and the relative humidity is below 60%. 3. Chemical cleaning: Do not use unknown chemical liquid to clean the LED, because that may damage the surface of the LED colloid and even cause collagen cracks. If necessary, please use alcohol -cotton swabs in room temperature and ventilation environment. Time is best controlled in one Windy wind is complete. 4, deformation causes dead lamps: Due to the deformation of some lamp plates, the operator will be plastic. Due to the deformation of the board, the lamp beads on it will also deform at the same time. There is this type of board for plastic surgery before production. Long -term production assembly and movement may also cause the phenomenon. There is also a stacking. In order to facilitate the convenience of the production process, the lamp board is stacked at will. Due to gravity, the lower lamp beads will be changed to the golden thread. 5. The heat dissipation structure, the power supply and the light board do not match: Due to the unreasonable power design or the selection of the power supply, the power supply exceeds the maximum limit (ultra -current, instant impact); Early light decline 6, factory grounding: must check whether the total ground line of the factory is good. 7, static electricity: static electricity can cause LED function to fail. It is recommended to prevent ESD from damaging LED. A, LED detection and assembly must bring anti -static bracelets and anti -static gloves. B. Welding equipment and testing equipment, working tables, storage racks, etc. must be well grounded. C. Use ion fan to eliminate static electricity generated by friction during storage and assembly during storage and assembly. D. The ingredient box with LED uses anti -static ingredients, and the packaging bag uses a static electric bag. E. Don't have a fluke, touch the LED. The abnormal phenomenon that will occur by the LED damaged by ESD is: A. Inverse leakage, the light will cause the brightness. B. The voltage value becomes smaller. LED cannot shine when low -current drivers. 8. Poor welding causes the lights to not light up.