LED封装公司和LED照明灯具生产厂家都会遇到LED死灯景象,作为LED工程师怎样剖析及处理这些问题？
LED packaging companies and LED lighting manufacturers will encounter LED dead lights scene, as LED engineers how to analyze and deal with these problems?
LED死灯因素主要有以下两点：
LED dead light factors are mainly the following two points:
1)LED的漏电流过大形成PN结失效，使LED灯点不亮，这种状况通常不会影响其它的LED灯的作业
1 LED leakage current through the formation of the PN junction failure, so that the LED lamp is not lit, this condition usually does not affect the work of other LED lights
2)LED灯的内部衔接引线断开，形成LED无电流经过而产存亡灯，这种状况会影响其它的LED灯的正常作业，
2) the internal connection of the LED lamp is disconnected, and the LED is formed without the current, which can affect the normal operation of other LED lamps,
怎样避免LED死灯？
How to avoid LED dead light?
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静电对LED灯来说是一种危害极大的魔鬼，全世界由于静电损坏的电子元器件不可胜数，形成数千万美元的经济损失。所以避免静电损坏电子元器件，是电子职业一项很主要的作业，LED封装、运用的公司千万不要掉以轻心。任何一个环节出疑问，都将形成对LED的危害，使LED功能变坏乃至失效。咱们知道人体(ESD)静电能够到达三千伏左右，足能够将LED芯片击穿损坏，在LED封装生产线，各类设备的接地电阻是不是符合请求，这也是很主要的，通常请求接地电阻为4欧姆，有些请求高的场合其接地电阻乃至要到达≤2欧姆。
Static electricity is a great harm to the devil LED lamp, all over the world due to electrostatic damage to electronic components countless, formation of tens of millions of dollars in economic losses. So to avoid static damage to electronic components, is a very important job of electronic occupation, LED packaging, the use of the company must not be taken lightly. Any part of the doubt, will form a LED hazard, so that LED function deterioration and failure. We know that the human body electrostatic (ESD) can reach about three thousand volts, enough to breakdown the LED chip, LED packaging production line, all kinds of equipment grounding resistance is not accord with the request, this is very important, usually request the grounding resistance of 4 ohms, some request high grounding resistance and even to the occasion at less than 2 ohms.
人体静电对LED的危害也是很大的，作业时应穿防静电服装，配带静电环，静电环应接地杰出，有一种不需要接地的静电环防静电的效果欠好，建议不运用配带该种商品，如果作业人员违背操作规程，则应承受相应的警示教学，一起也起到告示别人的效果。人体带静电的多少，与人穿的不同布料衣服、及各人的体质有关，秋冬季黑夜咱们脱衣服就很简单看见衣服之间的放电景象，这种静电放电的电压就有三千伏。
Body static electricity on LED is great, work should wear anti-static clothing, anti-static ring with electrostatic ring should be grounded, outstanding, there is a need of electrostatic grounding ring antistatic effect is not good, recommended not to use with the goods, if the operator violate the rules, it should be bear the corresponding warning teaching together, also plays the effect of others notice. How many different body with static electricity, cloth clothes, and wear and his physique, autumn and winter clothes on the night we saw the scene is very simple discharge between the clothes, the voltage is three thousand volts electrostatic discharge.
有些公司选用手工焊接，运用40瓦一般烙铁，焊接温度无法控制，烙铁温度在300-400℃以上，过高的焊接温度也会形成死灯，LED引线在高温下膨胀系数比在150℃左右的膨胀系数高好几倍，内部的金丝焊点会由于过大的热胀冷缩将焊接点摆开，形成死灯景象。
Some companies use manual welding, using 40 Watt general iron, welding temperature control, iron temperature at 300-400 Deg. C, high temperature welding will be the formation of dead lights, LED lead coefficient ratio at about 150 DEG C. the expansion coefficient of several times higher in high temperature, gold wire solder joints will be due to excessive thermal expansion will point out the welding, forming die sight lamp.
对于上述景象,LED封装厂家和LED照明灯具运用厂家应拟定严格的LED规范运用手册，在生产过程中根绝上线景象的发作。
For the scene, LED packaging manufacturers and LED lighting manufacturers should use made LED standard strictly use manual, in the production process according to attack scene on the line.

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