Journal ArticleDOI
Estimation of Optical Power and Heat-Dissipation Factor of Low-Power SMD LED as a Function of Injection Current and Ambient Temperature
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TLDR
In this paper, wall-plug efficiency equations of PET theory were extended to estimate heat-dissipation factor and optical power of low-power surface-mounted device (SMD) LED.Abstract:
Optimization of light-emitting diode (LED) design is highly dependent on the relationship between photometric, electric, and thermal parameters of the device. The photoelectrothermal (PET) theory connects all the features of LED device. In this paper, wall-plug efficiency equations of PET theory were extended to estimate heat-dissipation factor and optical power of low-power surface-mounted device (SMD) LED. The wall-plug efficiency as a function of ambient temperature and injection current is used to predict the heat-dissipation factor and the optical power of the SMD LED. The TeraLED and T3ster systems were utilized to provide optical and thermal test reports of the LED parameters at a certain range of injection current and ambient temperature. The presented equations were verified by testing on low-power SMD LED. Results demonstrate that the estimated and measured values were in good agreement for all the considered parameters. This validates the extension of PET theory equations for low-power SMD LED.read more
Citations
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Journal ArticleDOI
Estimation of Luminous Flux and Luminous Efficacy of Low-Power SMD LED as a Function of Injection Current and Ambient Temperature
TL;DR: In this paper, the extension of light output equation was used to estimate luminous flux and efficacy of low-power surface-mounted device LED, and the optimized operating conditions of LED under test were determined.
Journal ArticleDOI
Model Identification and Wall-Plug Efficiency Measurement of White LED Modules
Ahmed Zurfi,Jing Zhang +1 more
TL;DR: In this paper, an experimental method is developed to measure the wall-plug efficiency of white LED modules without using any apparatus or sensors to measure intensity of light, and the proposed method is mainly based on thermal and electrical models of the LED module.
Journal ArticleDOI
Modeling Spectra of Low-Power SMD LEDs as a Function of Ambient Temperature
TL;DR: In this article, an extension of spectrum model was used to estimate the spectral flux of indium gallium aluminum phosphide (InGaAlP)-based low-power surface-mounted device (SMD) LEDs.
Journal ArticleDOI
Ultra-High Light Extraction Efficiency and Ultra-Thin Mini-LED Solution by Freeform Surface Chip Scale Package Array
Che-Hsuan Huang,Chieh-Yu Kang,Shu-Hsiu Chang,Chih Hao Lin,Chun-Yu Lin,Tingzhu Wu,Chin-Wei Sher,Chien-Chung Lin,Po-Tsung Lee,Hao-Chung Kuo +9 more
TL;DR: A novel type of package, freeform-designed chip scale package (FDCSP), which has ultra-high light extraction efficiency and bat-wing light field is presented, which could provide a thinner and low power consumption mini-LED solution with a smaller number of LEDs than CSP and SMD light source array.
Journal ArticleDOI
Experimental study on thermal performance of SMD-LED chips under the effects of electric wire pattern and LED arrangement
TL;DR: In this paper, the thermal performance of SMD-LEDs mounted on plate-fin heat sink (HS) and effects of LED arrangement, HS size, particularly heat spreading effect by electric wire pattern in PCB were investigated.
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