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浅谈LED灯具的光衰问题

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浅谈LED灯具的光衰问题

发布日期:2017-11-16 11:50 来源:http://syfe668.com 点击:

LED灯具光衰虽然比白炽灯和荧光灯都有所改良,但是也不能完全克服光衰问题。针对LED 的光衰主要有以下因素:LED 产品本身品质问题,采用的LED芯片品质不好,亮度衰减较快。还有,如果散热不好,同样导致光衰加大,led灯珠寿命大大缩短。灯具要用好的铝材才能保证散热。目前,市场上大量塑胶、玻璃led灯管,散热严重不足,寿命短,本末倒置,得不偿失。生产工艺存在缺陷,LED芯片散热不能良好的从PIN脚导出,导致 LED 芯片温度过高使芯片衰减加剧。使用条件问题,LED为恒流驱动,有部分LED灯采用电压驱动原因,使LED衰减过快。 驱动电流大于额定驱动条件。其实导致 LED 产品光衰的原因很多,但最关键的还是散热问题。散热性能越好,LED工作温度越低,光衰越小,LED寿命就越长。


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