Spectral Optimization of White LED with Brightness Adjustable Based on Mesopic Vision

Rongbo Li; Zhifeng Wang; Yang Xu; Changjun Li

doi:10.3788/LOP202259.1133001

Journals >Laser & Optoelectronics Progress >Volume 59 >Issue 11 >Page 1133001 > Article

Laser & Optoelectronics Progress
Vol. 59, Issue 11, 1133001 (2022)

Spectral Optimization of White LED with Brightness Adjustable Based on Mesopic Vision

Rongbo Li, Zhifeng Wang^*, Yang Xu^**, and Changjun Li

Author Affiliations

College of Computer and Software Engineering, University of Science and Technology Liaoning, Anshan 114051, Liaoning , China

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DOI: 10.3788/LOP202259.1133001 Cite this Article Set citation alerts

Rongbo Li, Zhifeng Wang, Yang Xu, Changjun Li. Spectral Optimization of White LED with Brightness Adjustable Based on Mesopic Vision[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1133001 Copy Citation Text

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Fig. 1. Mesopic luminous efficiency functions for 4 luminance levels

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Fig. 2. Variation curve of mesopic limit luminous efficiency with mesopic brightness

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Fig. 3. Variation curve of

φ_{a b}

with

L_{m e s}

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Fig. 4. Variation curve of CCT with

L_{m e s}

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Fig. 5. Optimal spectral relative power of 4 mesopic visual brightness when Q=70

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Fig. 6. Optimal spectral relative power of 4 mesopic visual brightness when Q=80

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Fig. 7. Optimal spectral relative power of 4 mesopic visual brightness when Q=90

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$L_{m e s} / (c d \cdot m^{- 2})$	0.50	0.80	1.25	1.75
$C C T / K$	5216	4572	3945	3720
$D_{u v}$	5.40 $\times$ 10^-3	5.40 $\times$ 10^-3	5.40 $\times$ 10^-3	5.40 $\times$ 10^-3
$φ_{b}$	1.29 $\times$ 10^-5	1.79 $\times$ 10^-5	2.33 $\times$ 10^-5	2.97 $\times$ 10^-5
$φ_{g}$	3.77 $\times$ 10^-6	6.88 $\times$ 10^-6	1.04 $\times$ 10^-5	1.49 $\times$ 10^-5
$φ_{o r}$	7.61 $\times$ 10^-6	1.29 $\times$ 10^-5	2.29 $\times$ 10^-5	3.32 $\times$ 10^-5
$λ_{b} / n m$	468.6586	466.9254	468.3579	467.9766
$λ_{g} / n m$	522.9684	529.3205	528.3368	530.3253
$λ_{o r} / n m$	589.5937	593.0800	594.7150	596.1191
$Δ λ_{b} / n m$	25	25	25	25
$Δ λ_{g} / n m$	70	70	70	70
$Δ λ_{o r} / n m$	70	70	70	70
$R_{f}$	71.8523	71.8877	71.5228	71.1791
$R_{a}$	70.0002	70.3140	70.0001	70.0002
$B / (W \cdot s r^{- 1} \cdot m^{- 2})$	1.39 $\times$ 10^-3	2.31 $\times$ 10^-3	3.69 $\times$ 10^-3	5.25 $\times$ 10^-3
$E_{m e s} / (l m \cdot W^{- 1})$	360.5220	347.0699	338.7914	333.5772

Table 1. Spectral optimization results of pc-WLED when Q=70

$L_{m e s} / (c d \cdot m^{- 2})$	0.50	0.80	1.25	1.75
$C C T / K$	5585	4749	4127	3861
$D_{u v}$	5.40 $\times$ 10^-3	5.40 $\times$ 10^-3	5.40 $\times$ 10^-3	5.40 $\times$ 10^-3
$φ_{b}$	1.20 $\times$ 10^-5	1.63 $\times$ 10^-5	2.21 $\times$ 10^-5	2.83 $\times$ 10^-5
$φ_{g}$	5.23 $\times$ 10^-6	8.75 $\times$ 10^-6	1.36 $\times$ 10^-5	1.91 $\times$ 10^-5
$φ_{o r}$	6.80 $\times$ 10^-6	1.25 $\times$ 10^-5	2.14 $\times$ 10^-5	3.17 $\times$ 10^-5
$λ_{b} / n m$	464.0256	465.5570644	465.0608	465.355
$λ_{g} / n m$	523.463	521.3666092	527.0071	528.2519
$λ_{o r} / n m$	596.773	599.1442283	601.1349	602.2257
$Δ λ_{b} / n m$	25	25	25.0013	25
$Δ λ_{g} / n m$	70	70	70.0004	70
$Δ λ_{o r} / n m$	70	70	70.0001	70
$R_{f}$	81.5266	81.7754	81.0385	81.1049
$R_{a}$	80.0004	79.9999	80.0000	80.0001
$B / (W \cdot s r^{- 1} \cdot m^{- 2})$	1.43 $\times$ 10^-3	2.39 $\times$ 10^-3	3.83 $\times$ 10^-3	5.46 $\times$ 10^-3
$E_{m e s} / (l m \cdot W^{- 1})$	350.3037	335.1380	326.4837	320.6321

Table 2. Spectral optimization results of pc-WLED when Q=80

$L_{m e s} / (c d \cdot m^{- 2})$	0.50	0.80	1.25	1.75
$C C T / K$	5928	5293	4429	4165
$D_{u v}$	5.40 $\times$ 10^-3	5.40 $\times$ 10^-3	5.40 $\times$ 10^-3	5.40 $\times$ 10^-3
$φ_{b}$	1.10 $\times$ 10^-5	1.67 $\times$ 10^-5	2.17 $\times$ 10^-5	2.80 $\times$ 10^-5
$φ_{g}$	6.40 $\times$ 10^-6	1.05 $\times$ 10^-5	1.65 $\times$ 10^-5	2.33 $\times$ 10^-5
$φ_{o r}$	6.41 $\times$ 10^-6	1.13 $\times$ 10^-5	2.02 $\times$ 10^-5	2.99 $\times$ 10^-5
$λ_{b} / n m$	456.9384	458.0459	459.3153	459.0125
$λ_{g} / n m$	521.5658	523.7809	526.4029	527.1908
$λ_{o r} / n m$	603.0222	605.0161	607.8438	608.4379
$Δ λ_{b} / n m$	25.0002	25.0006	25.0000	25.0000
$Δ λ_{g} / n m$	70.0002	70.0004	70.0000	70.0000
$Δ λ_{o r} / n m$	70.0000	70.0002	70.0000	70.0000
$R_{f}$	90.0000	90.0002	90.0038	90.0000
$R_{a}$	90.00007	90.0001	90.0002	90.0000
$B / (W \cdot s r^{- 1} \cdot m^{- 2})$	1.48 $\times$ 10^-3	2.48 $\times$ 10^-3	4.01 $\times$ 10^-3	5.73 $\times$ 10^-3
$E_{m e s} / (l m \cdot W^{- 1})$	337.1321	322.9773	311.8117	305.4343

Table 3. Spectral optimization results of pc-WLED when Q=90

Rongbo Li, Zhifeng Wang, Yang Xu, Changjun Li. Spectral Optimization of White LED with Brightness Adjustable Based on Mesopic Vision[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1133001

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