Performance Characterization and Theoretical Modeling of Emitted Optical Power for High-Power White-LED Devices
In this paper, optical power of high-power white-light-emitting diode (LED) devices is evaluated and characterized. A theoretical model for optical power is proposed. The measurements reveal that optical power decreases exponentially with junction temperature and increases linearly with current. The...
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| Veröffentlicht in: | IEEE transactions on electron devices 2015-05, Vol.62 (5), p.1511-1515 |
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| creator | Tao, Xuehui |
| description | In this paper, optical power of high-power white-light-emitting diode (LED) devices is evaluated and characterized. A theoretical model for optical power is proposed. The measurements reveal that optical power decreases exponentially with junction temperature and increases linearly with current. The model considers conjunct effect of current and junction temperature on emitted optical power. The proposed theoretical model of optical power will facilitate the optical and thermal performance evaluation of LED devices and will be helpful to device design. With the presented optical power model, heat power can be estimated, because they are complementary to each other. Then, junction temperature of LED device can be predicted with known heat power. In addition, the optical power model can be applied to eliminate chromaticity shift phenomenon of trichromatic-based white-LED devices, simply by monitoring junction temperature and injection current of each chip. Validity of the optical power model has been verified by experimental measurements on two types of commercial LED devices. |
| doi_str_mv | 10.1109/TED.2015.2410032 |
| format | Article |
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A theoretical model for optical power is proposed. The measurements reveal that optical power decreases exponentially with junction temperature and increases linearly with current. The model considers conjunct effect of current and junction temperature on emitted optical power. The proposed theoretical model of optical power will facilitate the optical and thermal performance evaluation of LED devices and will be helpful to device design. With the presented optical power model, heat power can be estimated, because they are complementary to each other. Then, junction temperature of LED device can be predicted with known heat power. In addition, the optical power model can be applied to eliminate chromaticity shift phenomenon of trichromatic-based white-LED devices, simply by monitoring junction temperature and injection current of each chip. Validity of the optical power model has been verified by experimental measurements on two types of commercial LED devices.</description><identifier>ISSN: 0018-9383</identifier><identifier>EISSN: 1557-9646</identifier><identifier>DOI: 10.1109/TED.2015.2410032</identifier><identifier>CODEN: IETDAI</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Devices ; Diodes ; Emittance ; Fiber optic communications ; Fiber optic networks ; Injection current ; junction temperature ; Junctions ; Light emitting diodes ; light-emitting diode (LED) ; Mathematical model ; Mathematical models ; Monitoring ; Optical devices ; optical power ; Optical variables measurement ; Performance evaluation ; Stimulated emission ; Temperature measurement</subject><ispartof>IEEE transactions on electron devices, 2015-05, Vol.62 (5), p.1511-1515</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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A theoretical model for optical power is proposed. The measurements reveal that optical power decreases exponentially with junction temperature and increases linearly with current. The model considers conjunct effect of current and junction temperature on emitted optical power. The proposed theoretical model of optical power will facilitate the optical and thermal performance evaluation of LED devices and will be helpful to device design. With the presented optical power model, heat power can be estimated, because they are complementary to each other. Then, junction temperature of LED device can be predicted with known heat power. In addition, the optical power model can be applied to eliminate chromaticity shift phenomenon of trichromatic-based white-LED devices, simply by monitoring junction temperature and injection current of each chip. Validity of the optical power model has been verified by experimental measurements on two types of commercial LED devices.</description><subject>Devices</subject><subject>Diodes</subject><subject>Emittance</subject><subject>Fiber optic communications</subject><subject>Fiber optic networks</subject><subject>Injection current</subject><subject>junction temperature</subject><subject>Junctions</subject><subject>Light emitting diodes</subject><subject>light-emitting diode (LED)</subject><subject>Mathematical model</subject><subject>Mathematical models</subject><subject>Monitoring</subject><subject>Optical devices</subject><subject>optical power</subject><subject>Optical variables measurement</subject><subject>Performance evaluation</subject><subject>Stimulated emission</subject><subject>Temperature measurement</subject><issn>0018-9383</issn><issn>1557-9646</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpdkc1P20AQxVdVkUiBO1IvK_XSi9P99vpYJS4gBcEhiKM1rMfJRo433XWoyl_PglEPPY2e5veeRvMIueRszjmrfqzr5VwwrudCccak-ERmXOuyqIwyn8mMMW6LSlp5Sr6ktMvSKCVmJNxj7ELcw-CQLrYQwY0Y_QuMPgwUhpautxgijt5BT29Di70fNjR0tN77ccSW3h2m3X34g5HmLHrtN9tiko9bP2Kxqpd0ic_eYTonJx30CS8-5hl5-FWvF9fF6u7qZvFzVThl1FhY7QyzEson05VQlSBNZVtQLdeK67a1yIRGBkwAIAjOuqpStlNWYNsZV8oz8n3KPcTw-4hpbPY-Oex7GDAcU8ON1Vbmh8mMfvsP3YVjHPJ175SwlWI6U2yiXAwpReyaQ_R7iH8bzpq3BprcQPPWQPPRQLZ8nSweEf_hJTMyJ8pXh46BQQ</recordid><startdate>20150501</startdate><enddate>20150501</enddate><creator>Tao, Xuehui</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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A theoretical model for optical power is proposed. The measurements reveal that optical power decreases exponentially with junction temperature and increases linearly with current. The model considers conjunct effect of current and junction temperature on emitted optical power. The proposed theoretical model of optical power will facilitate the optical and thermal performance evaluation of LED devices and will be helpful to device design. With the presented optical power model, heat power can be estimated, because they are complementary to each other. Then, junction temperature of LED device can be predicted with known heat power. In addition, the optical power model can be applied to eliminate chromaticity shift phenomenon of trichromatic-based white-LED devices, simply by monitoring junction temperature and injection current of each chip. 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| source | IEEE Electronic Library (IEL) |
| subjects | Devices Diodes Emittance Fiber optic communications Fiber optic networks Injection current junction temperature Junctions Light emitting diodes light-emitting diode (LED) Mathematical model Mathematical models Monitoring Optical devices optical power Optical variables measurement Performance evaluation Stimulated emission Temperature measurement |
| title | Performance Characterization and Theoretical Modeling of Emitted Optical Power for High-Power White-LED Devices |
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