Dynamic Visual Performance of LED with Different Color Temperature

Zhao, Jiandong; Ma, Shuo

doi:10.14257/ijsip.2016.9.6.38

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…An optimal spectrum for trichromatic white LED with a combination of wavelengths at 460, 540, and 615 nm provided the best luminous efficacy, 336 lm/W [16]. Jiandong discussed the visual performance by implementing a dynamic experiment in reaction time with high, middle, and low color temperatures, and the results implied that the reaction time decreased with the raising of background brightness and contrast and the high color temperature LED [17]. Gao modified the parameters a and b to avoid no solution or multi-solutions and proposed the Bisection-Newton method for faster convergence in the CIE system of mesopic photometry MES2.…”

Section: Introductionmentioning

confidence: 99%

Spectral Optimization of White LED Based on Mesopic Luminance and Color Gamut Volume for Dim Lighting Conditions

Sun

Huang

et al. 2020

Applied Sciences

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The study aims to propose an approach of white LED spectral optimization based on mesopic luminance and color gamut volume for dim lighting conditions. Three optimal white LED spectra with relatively higher mesopic luminance and color gamut volume, the highest mesopic luminance, and the largest gamut volume are recommended for reducing energy consumption and enhancing color perception and recognition of human eyes. The theoretical simulation shows that the spectra with higher correlated color temperatures (CCT) and S/P-ratio increase the mesopic luminance and also extend the range of color gamut with the decreasing of lighting level. An evaluation model is developed to faster predict mesopic luminance, color gamut volume, and S/P ratio for lighting applications.

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Section: Introductionmentioning

confidence: 99%

Spectral Optimization of White LED Based on Mesopic Luminance and Color Gamut Volume for Dim Lighting Conditions

Sun

Huang

et al. 2020

Applied Sciences

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Lighting Quality Improving Work Thoroughness of Sorting Operators

Anizar

Siregar

Putri

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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This study observes work thoroughness of sorting operators in quality control station at drinking bottle industry. Operators sort the bottles manually using naked eyes to decide whether the bottles have some defects or not. Dirty bottles, cracked, chipped or have water volume that is different from other bottles will be taken by operators. The low light intensity in quality control station causes high numbers of defect bottles to pass the inspection. The standard of Government of Indonesia Health Ministerial Decree No 1405 The Year 2002 that work performed continuously needs 200 lux of lighting. Illuminance level measurement is conducted for five days at 09.00, 11.00, 13.00, and 15.00 o’clock using lux meter on four measurement points using a grid of 1m x 1m. In this study, the average light intensity in quality control station 1 and 2 is 59.30 lux and 52.15 lux. The number of defective products that pass the inspection in a quality control station for 5 days of observation is 2,676 bottles or 55.47% from the total defect products, while the number allowed by the company is only 5%. The correlation between illumination factor in quality control station 1 and defect products that pass the inspection is calculated moment Pearson correlation product and the results are ŷ=292,885-1,317x and r=-0,3147, while in quality control station 2 the results are ŷ=524,077-4,919x and r=-0,6329. The higher illumination level, the lower the number of defective products that pass the inspection, which means operators’ work thoroughness improve.

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Dynamic Visual Performance of LED with Different Color Temperature

Abstract: Abstract

Cited by 2 publications

References 7 publications

Spectral Optimization of White LED Based on Mesopic Luminance and Color Gamut Volume for Dim Lighting Conditions

Spectral Optimization of White LED Based on Mesopic Luminance and Color Gamut Volume for Dim Lighting Conditions

Lighting Quality Improving Work Thoroughness of Sorting Operators

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