翻訳と辞書 Words near each other ・ List of Lebanese people in the Caribbean ・ List of Lebanese people in the Netherlands ・ List of Lebanese people in the United Arab Emirates ・ List of Lebanese people in the United Kingdom ・ List of Lebanese people in Uruguay ・ List of Lebanese people in Venezuela ・ List of Lebanese records in athletics ・ List of Lebanese records in swimming ・ List of Lebanese rocket attacks on Israel ・ List of Lebanese submissions for the Academy Award for Best Foreign Language Film ・ List of Lebanese syndicates and orders ・ List of Lebanese television series ・ List of Lebanese women writers ・ List of Lecanora species ・ List of Leccinum species ・ List of LED failure modes ・ List of Led Zeppelin songs written or inspired by others ・ List of Lee High School Mascots ・ List of leeches of the Czech Republic ・ List of Leeds Rhinos head coaches ・ List of Leeds Rhinos international players ・ List of Leeds Rhinos players with honours ・ List of Leeds United F.C. managers ・ List of Leeds United F.C. players ・ List of Leeds United F.C. records and statistics ・ List of Leeds United F.C. seasons ・ List of Leeward Islands first-class cricketers ・ List of left and far left parties in Europe ・ List of Left Behind characters ・ List of Left communist organizations by country Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク List of LED failure modes ： ウィキペディア英語版 List of LED failure modes (詳細はLEDs (and diode lasers) to fail is the gradual lowering of light output and loss of efficiency. Sudden failures, however rare, can occur as well. Early red LEDs were notable for their short lifetime. ==Packaging-related== *Epoxy degradation: Some materials of the plastic package tend to yellow when subjected to heat, causing partial absorption (and therefore loss of efficiency) of the affected wavelengths. * Thermal stress: Sudden failures are most often caused by thermal stresses. When the epoxy resin package reaches its glass transition temperature, it starts rapidly expanding, causing mechanical stresses on the semiconductor and the bonded contact, weakening it or even tearing it off. Conversely, very low temperatures can cause cracking of the packaging. * Differentiated phosphor degeneration: The different phosphors used in white LEDs tend to degrade with heat and age, but at different rates causing changes in the produced light color, for example, purple and pink LEDs often use an organic phosphor formulation which may degrade after just a few hours of operation causing a major shift in output color.〔(【引用サイトリンク】 Candlepower Pink LED Reviews )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of LED failure modes」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.