Optical and thermal simulation chain for LED package

Tapaninen, Olli; Myöhänen, P; Majanen, Mikko; Sitomaniemi, Aila; Olkkonen, Juuso; Hildenbrand, V. D.; Gielen, A.W.J.; Mackenzie, Fidel Valega; Barink, M.; Šmilauer, Vít; Patzák, B.

doi:10.1109/eurosime.2016.7463349

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…Applying Mie theory [14][15][16][17], the scattering coefficient μsca(λ), anisotropy factor g(λ), and reduced scattering coefficient δsca(λ) can be computed by the below expressions:…”

Section: Methodsmentioning

confidence: 99%

“…Csca is the scattering cross sections (mm 2 ), p(θ,λ,r) is the phase function, λ is the light wavelength (nm), r is the radius of diffusional particles (µm), θ is the scattering angle (°), and f(r)) is the size distribution function of the diffuser in the phosphorous layer. Furthermore, the relationship between luminous output and the red phosphor concentration can be formulated according to Mie-scattering theory and the Beer-Lambert law [14][15][16][17] as the following (4) Where I is the transmitted light power, I0 is the incident light power, µext = N.Cext is the extinction coefficient, L is the path length, and N is the number of particles per cubic millimeter.…”

Section: Methodsmentioning

confidence: 99%

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Improving CQS, CRI and LO of the 5600K RP-WLEDs by Red-emitting Conversion Phosphor

Tin

Le²,

Nhân³

et al. 2018

AUSMT

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In the few last decades, Light-emitting diodes (LEDs) is considered the newest solid-state lighting technique advancement in both industry and civil lighting. In this paper, we improve the Color rendering index (CRI), Color quality scale (CQS) and lumen output (LO) of the 5600 K remote-packaging white LEDs (RP-WLEDs) by the red-emitting conversion Sr2Si5N8:Eu 2+ phosphor. The influence of the red phosphor concentration on the CQS, CRI, and LO are proposed and demonstrated by using Mie Theory with Mat Lab and Light Tools software. The results draw that CRI, CQS, and LO are significantly affected by the red phosphor concentration, which can provide a potential practical recommendation for manufacturing RP-WLEDs.

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“…Applying Mie theory [14][15][16][17], the scattering coefficient μsca(λ), anisotropy factor g(λ), and reduced scattering coefficient δsca(λ) can be computed by the below expressions:…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Improving CQS, CRI and LO of the 5600K RP-WLEDs by Red-emitting Conversion Phosphor

Tin

Le²,

Nhân³

et al. 2018

AUSMT

View full text Add to dashboard Cite

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“…Yuan, [19]) behavior in the optical system as the package degrades. Tapaninen et al [13] presented a test case for coupling two physical aspects of an LED, optical and thermal, using specific simulation models coupled through an open source platform for distributed multi-physics modeling. They showed how to connect a Mie theory based scattering calculator with ray tracing.…”

Section: Simulations For Lighting Applicationsmentioning

confidence: 99%

“…It is used for incident detection and failure analysis by monitoring environmental conditions that influence the luminaire life time. The module consists of (see also Figs 13…”

mentioning

confidence: 99%

Health Monitoring for Lighting Applications

Driel

Middelburg

Mansouri

et al. 2019

Sensor Systems Simulations

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The history of reliability as we know it now goes back to the 1950s, when electronics played a major role for the first time [1,2]. Now, 70 decades later, the electronic industry is facing a continuous increase of early and wear-out failures with accompanying consequences. Figure 13.1 depicts the struggle for the different high-tech industries, ranging from harsh environment suitability to long lifetime and warranty coverage. Nowadays, products with high failure rates are logged on the web leading to bad reputation for a company. In many ways, reliability is part of everyday life and part of consumer expectations. The word reliability is extensively used by the general public and the technical community, as illustrated by the following: there are over 3000 published books whose title or keywords contain the word reliability; the web of science lists some 10,000 technical papers with "reliability" as a keyword (since 1973); and the popular search engine Google lists over 12 million occurrences of "reliability" on the world wide web.Solid state lighting applications are now at the doorstep of massive market entry [3,4]. The penetration will grow most rapidly in the street and roadway and general service submarkets in terms of the percentage of total lumen-hour sales [5][6][7]. Scenarios estimate the expected future adoption of LEDs based on historical data

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