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LED aging acceleration – an analysis from measuring and aging data of 14,000 hours LED degradation

Wagner, Max ; Herzog, Alexander G. ; Ganev, Hristo ; Khanh, Tran Quoc
China Solid State Lighting Alliance (CSA) (ed.) :

LED aging acceleration – an analysis from measuring and aging data of 14,000 hours LED degradation.
China Solid State Lighting Alliance (CSA) (.) In: China International Forum on Solid State Lighting (SSLChina), 2.-4. November 2015, Shenzhen.
[Konferenz- oder Workshop-Beitrag], (2015)

Kurzbeschreibung (Abstract)

In the LM 80 testing standard method the lumen maintenance [1] of light sources is measured during their lifetime. As long as the spectral behavior is not changing over time, there is no doubt in that method. Since the integral value of the luminous flux is weighted with the V(l)-function, degradation in the red and blue parts of the spectrum are represented less than changes in green and yellow spectral ranges. For this purpose spectral bands and their ratio over lifetime are analyzed and compared to each other. Data of 14,000 hours are presented in this study. Aging curves of the luminous flux und optical power are compared and analyzed by the described methods. Extrapolation and accelerated lifetime tests are used to predict spectral changes and their characteristics.

Typ des Eintrags: Konferenz- oder Workshop-Beitrag (Keine Angabe)
Erschienen: 2015
Autor(en): Wagner, Max ; Herzog, Alexander G. ; Ganev, Hristo ; Khanh, Tran Quoc
Titel: LED aging acceleration – an analysis from measuring and aging data of 14,000 hours LED degradation
Sprache: Englisch
Kurzbeschreibung (Abstract):

In the LM 80 testing standard method the lumen maintenance [1] of light sources is measured during their lifetime. As long as the spectral behavior is not changing over time, there is no doubt in that method. Since the integral value of the luminous flux is weighted with the V(l)-function, degradation in the red and blue parts of the spectrum are represented less than changes in green and yellow spectral ranges. For this purpose spectral bands and their ratio over lifetime are analyzed and compared to each other. Data of 14,000 hours are presented in this study. Aging curves of the luminous flux und optical power are compared and analyzed by the described methods. Extrapolation and accelerated lifetime tests are used to predict spectral changes and their characteristics.

Fachbereich(e)/-gebiet(e): 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Elektromechanische Konstruktionen > Lichttechnik
18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Elektromechanische Konstruktionen
18 Fachbereich Elektrotechnik und Informationstechnik
Veranstaltungstitel: China International Forum on Solid State Lighting (SSLChina)
Veranstaltungsort: Shenzhen
Veranstaltungsdatum: 2.-4. November 2015
Hinterlegungsdatum: 03 Mai 2016 16:36
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