Optimal spectrum modeling calculation with light emitting diodes set based on relative quantum efficiency

Niangoran, Urbain; Canale, Laurent; Tian, Fengqing; Haba, T. Cisse; Zissis, Georges

doi:10.17660/actahortic.2019.1242.121

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…On the other hand, it is interesting to reduce the number of different LED types in an industrial setting. Even if this increases the deviation of the simulated curve compared to the target one, it induces only a slight loss in energy efficiency (about 5 % [47]). However, the benefits are numerous: reduction in production cost, simpler driver electronics, increased reliability, and reduced maintenance cost [47,48].…”

Section: Twmentioning

confidence: 98%

“…Even if this increases the deviation of the simulated curve compared to the target one, it induces only a slight loss in energy efficiency (about 5 % [47]). However, the benefits are numerous: reduction in production cost, simpler driver electronics, increased reliability, and reduced maintenance cost [47,48]. This is why we lowered the number of LED types to 5 different colored LEDs while maintaining the same overall electrical power injected into the LEDs.…”

Section: Twmentioning

confidence: 98%

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An Approach for Designing Mixed Light-Emitting Diodes to Match Greenhouse Plant Absorption Spectra

et al. 2021

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We report a methodological approach for simulating luminary output radiation, which is achieved by mixing light-emitting diodes (LEDs) in order to match any plant absorption spectrum. Various recorded narrow-band LED spectra of different colors were first characterized and then fitted with a multi-Gaussian model. An optimizing procedure computed the optimal weighting of the relevant parameters so as to minimize the discrepancy between the combined spectrum and the reference target curve. The particle swarm optimization (PSO) method was applied because it is the most suitable technique for mono-objective situations. Within the useful spectral interval, the worst relative standard deviation between the optimized curve and recorded LED spectral power distribution (SPD) was 3.4%. When combining different LED types, the simulated light output showed that we could limit ourselves to selecting only five colored sources. This work will help us to design an optimized 200W laboratory luminaire with a pulse-width switched-mode power supply.

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Section: Twmentioning

confidence: 98%

Section: Twmentioning

confidence: 98%

An Approach for Designing Mixed Light-Emitting Diodes to Match Greenhouse Plant Absorption Spectra

et al. 2021

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“…LED light sources have been employed to simulate desired lighting spectra owing to their remarkable advantages, such as spectral design flexibility [6][7][8][9] and high energy efficiency. The principle of spectral superposition enables effective spectral mixing to achieve target spectra using multiple monochromatic and phosphor-converted (PC) LEDs [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Spectral Design Method to Simulate Tunable Spectra of Various Light Sources Based on Multi-Channel LEDs

Tao,

Zhao,

et al. 2024

IEEE Photonics J.

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Using a single light source to simulate tunable spectra of various light sources, such as International Commission on Illumination (CIE) standard illuminants, has attracted great interest. This can be realized through the spectral mixing of multi-channel LEDs. However, there is currently a lack of a general and comprehensive spectral-mixing method that can effectively achieve the target spectra with a minimized number of LED channels. In this work, we propose such a method. It begins by determining the desired wavelength range according to an eyesensitivity threshold based on the V(λ) function. Subsequently, a strategy for LED component selection is introduced. Lastly, detailed spectral mixing strategies are presented: (i) when using a large number of LED channels, spectral mixing optimization for direct spectral-shape matching ensures favorable outcomes; while (ii) with a limited number of LED channels, solely relying on the effort of matching the spectral shape may lead to a significant deviation in correlated color temperature (CCT). To solve this problem, an additional step of color mixing is applied. Our proposed method demonstrates significant improvements over prior methods in terms of spectral and CCT matching quality, as well as using a reduced number of LED channels.

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Regulation of chloroplast ultrastructure, adventitious bud anatomy and clonal fidelity of in vitro Zingiber officinale var. rubrum Theilade plantlets in response to LED spectral quality

Gnasekaran

Rahman

Chew

et al. 2022

Industrial Crops and Products

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Optimal spectrum modeling calculation with light emitting diodes set based on relative quantum efficiency

Cited by 6 publications

References 11 publications

An Approach for Designing Mixed Light-Emitting Diodes to Match Greenhouse Plant Absorption Spectra

An Approach for Designing Mixed Light-Emitting Diodes to Match Greenhouse Plant Absorption Spectra

Spectral Design Method to Simulate Tunable Spectra of Various Light Sources Based on Multi-Channel LEDs

Regulation of chloroplast ultrastructure, adventitious bud anatomy and clonal fidelity of in vitro Zingiber officinale var. rubrum Theilade plantlets in response to LED spectral quality

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