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Noncontact and instant detection of phosphor temperature in phosphor-converted white LEDs

hal.structure.identifierInstitute of Lighting and Display Science
hal.structure.identifierOptical Sciences Center
dc.contributor.authorYANG, Tsung-Hsun
hal.structure.identifierInstitute of Lighting and Display Science
dc.contributor.authorHUANG, Hsu-Yi
hal.structure.identifierInstitute of Lighting and Display Science
hal.structure.identifierOptical Sciences Center
dc.contributor.authorSUN, Ching-Cherng
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGLORIEUX, Benoit
hal.structure.identifierInstitute of Lighting and Display Science
hal.structure.identifierOptical Sciences Center
dc.contributor.authorLEE, Xuan-Hao
hal.structure.identifierOptical Sciences Center
dc.contributor.authorYU, Yeh-Wei
hal.structure.identifierInstitute of Lighting and Display Science
dc.contributor.authorCHUNG, Te-Yuan
dc.date.issued2018
dc.identifier.issn2045-2322
dc.description.abstractEnPhosphor-converted white light-emitting diodes (pc-WLEDs) have become a major light source in general lighting. To stabilize the photometric characteristics of pc-WLEDs, much effort has been made to manage the heat dissipation of the LED dies. The thermal problems of the phosphor parts, a critical reliability concern for pc-WLEDs, have recently attracted academic interest. This study proposed a practical approach for measuring phosphor temperature in an operating pc-WLED using a noncontact, instant detection method to remotely monitor the emission spectrum. Conventionally, an infrared camera or thermocouples have been used to measure temperature. An IR camera requires good calibration on the emissivity and is usually blocked by the lens or other components covered on the phosphors. Moreover, a thermocouple requires time to reach the thermal equivalence between the detector and the sample under testing, and this approach is destructive when used for inner detection. Our approach has advantages over the conventional methods because it is noninvasive, noncontact, and instant, and inner detection. The approach is also independent of the peak wavelength of pumping lights, the concentration and thickness of phosphor, and correlated color temperatures.
dc.language.isoen
dc.publisherNature Publishing Group
dc.title.enNoncontact and instant detection of phosphor temperature in phosphor-converted white LEDs
dc.typeArticle de revue
dc.identifier.doi10.1038/s41598-017-18686-z
dc.subject.halChimie/Matériaux
dc.subject.halSciences de l'ingénieur [physics]/Optique / photonique
bordeaux.journalScientific Reports
bordeaux.page296
bordeaux.volume8
bordeaux.peerReviewedoui
hal.identifierhal-01688859
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01688859v1
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