中功率LED為照明應(yīng)用提供了更便宜的替代方案

　　在這十年之初，一個(gè)完整的產(chǎn)品和制造基礎(chǔ)設(shè)施被建立起來(lái)，以滿足電視機(jī)制造商對(duì)LED背光的需求。電視制造商受到消費(fèi)者的巨大價(jià)格壓力，要求LED制造商推出廉價(jià)的背光解決方案。（見(jiàn)高新區(qū)的文章“LED背光液晶電視畫(huà)面質(zhì)量的提高。”）來(lái)支持新的LED電視領(lǐng)域，LED制造商增加了一倍以上的制造能力和增加了一個(gè)類似的塑料包裝用于安裝背光LED的支持水平。

　　事實(shí)證明，LED電視生產(chǎn)商并不需要像預(yù)期的那樣大量生產(chǎn)廉價(jià)LED，從而導(dǎo)致重大的工業(yè)產(chǎn)能過(guò)剩。面對(duì)大量的產(chǎn)品，LED制造商將“中功率”塑料封裝LED推向照明制造商。這些公司辯稱，他們的中電套件提供給設(shè)計(jì)師的是一般照明所需的高端設(shè)備，而不是傳統(tǒng)照明所需的高端設(shè)備。

　　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.