中功率LED为照明应用提供了更便宜的替代方案

　　中功率LED为照明应用提供了更便宜的替代方案

　　在这十年之初，一个完整的产品和制造基础设施被建立起来，以满足电视机制造商对LED背光的需求。电视制造商受到消费者的巨大价格压力，要求LED制造商推出廉价的背光解决方案。（见高新区的文章“LED背光液晶电视画面质量的提高。”）来支持新的LED电视领域，LED制造商增加了一倍以上的制造能力和增加了一个类似的塑料包装用于安装背光LED的支持水平。

　　事实证明，LED电视生产商并不需要像预期的那样大量生产廉价LED，从而导致重大的工业产能过剩。面对大量的产品，LED制造商将“中功率”塑料封装LED推向照明制造商。这些公司辩称，他们的中电套件提供给设计师的是一般照明所需的高端设备，而不是传统照明所需的高端设备。

　　However， like with most electronics components， there was something of a trade-off between price and durability. At the high temperatures typically experienced by LEDs used for lighting， the very plastic packaging that reduced the cost of the device was also a source of degradation. This degradation could result in poor lumen maintenance， leading to shorter LED life and chromaticity shift. To counter the problems a major manufacturer is now introducing mid-power LEDs based on ceramic substrates.

　　This article provides an overview of the mid-power LED sector with examples of plastic- and ceramic-packaged devices from leading LED vendors.