We often come across the led 1w is not lit, packaging companies, application companies, and the use of units and individuals are likely to encounter, and this is the dead lights in the industry said. The reason is nothing more than two situations: First, the LED leakage current caused by the failure of the PN junction, the LED lit the lamp is not lit, this situation will not affect the work of other LED lights; Second, the LED light internal connection lead disconnected, causing the LED is no current through the arising dead lights, this will affect the other LED lights work properly because of low operating voltage of the LED lights (red, yellow, orange LED Operating voltage 1.8V-2.2V blue, green and white led power 10w working voltage 2.8-3.2V) are generally required to use strings, parallel join, to adapt to different working voltage series LED lights are more affected, as long as there is an LED light internal wiring open circuit , will result in the series circuit of a whole string of LED lights are not bright, visible circumstances of this case than the first more serious. LED dead lights affect product quality, reliability of the key, how to reduce and eliminate the dead lights, and improve product quality and reliability, is packaged applications enterprises need to address the key issues. The following are some analysts explore some of the reasons causing the dead lights,
electrostatic damage the led 10w chip, LED chips of the PN junction failure, leakage current increases, become a resistance of static electricity is a crime against the great devil, the world countless electrostatic damage to electronic components, resulting in tens of millions of dollars in economic losses. So to prevent electrostatic damage to electronic components, is a very important task of the electronics industry, LED packaging, application of the enterprise do not take it lightly. Any link problems, will result in damage to the LED, the LED performance deterioration and even failure. We know that the human body static electricity (ESD) can reach about three kV, enough for the High Power LED 50W chip to breakdown damage in the led power 50w packaging production line, the grounding resistance of various types of equipment to meet the requirements, it is also important, general requirements for the grounding resistance of 4 Ohm, some of the occasions the grounding resistance even to achieve ≤ 2 ohms. These requirements are for the electronics industry, people familiar with the key is in the actual implementation is in place, whether there is record.