Research on LED Temperature Spectral Compensation Based on Visual and Non-Visual Effects

Xiangyan Zhou; Jianfei Li; Xiaoming Zhou

doi:10.3788/AOS202141.1933001

Acta Optica Sinica, Volume. 41, Issue 19, 1933001(2021)

Research on LED Temperature Spectral Compensation Based on Visual and Non-Visual Effects

Xiangyan Zhou, Jianfei Li, and Xiaoming Zhou^*

State Key Laboratory of Subtropical Building Science, School of Physics, South China University of Technology, Guangzhou, Guangdong 510641, China

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Figures & Tables(10)

Fig. 1. Drive system block diagram of RGBY LED

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Fig. 2. Schematic diagram of experimental test platform

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Fig. 3. SPD curves of four-color LED light source at 30 ℃，80 ℃，and 120 ℃

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Fig. 4. Measured SPD curves and model SPD curves of LED at 30 ℃，80 ℃，and 120 ℃. (a) D50 light source; (b) D65 light source

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Fig. 5. Temperatures-parameters change of D50 and D65 light source. (a) CCT and E; (b) C_AF

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Fig. 6. Spectral power distributions of light source before and after compensation. (a) D50 light source; (b) D65 light source

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Fig. 7. Parameters absolute difference ratio of light source before and after compensation. (a) D50 light source; (b) D65 light source

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Table 1. ${\bar{R}}^{2}$ value of Gaussian model, Gaussian-Lorentz model, and S-Gaussian model of four-color LED
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Table 1. ${\bar{R}}^{2}$ value of Gaussian model, Gaussian-Lorentz model, and S-Gaussian model of four-color LED
Model rLED gLED bLED yLED
Gaussian model 0.986 0.982 0.983 0.796
Gaussian-Lorentz model 0.968 0.991 0.987 0.747
S-Gaussian model 0.962 0.970 0.965 0.992

Table 2. Comparison of model and experimental values of D50 and D65 light source parameters
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Table 2. Comparison of model and experimental values of D50 and D65 light source parameters
Multi-LED CCT /% E /% R_a /% Δu′v′ C_AF /%
D50 3.75(60 ℃) 3.05(120 ℃) 4.70(50 ℃) 0.0107(110 ℃) 5.58(110 ℃)
D65 4.55(120 ℃) 4.43(120 ℃) 6.15(50 ℃) 0.0119(110 ℃) 6.08(110 ℃)

Table 3. Compensated duty cycle calculation results of D50 and D65 light sources based on DE algorithm

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Table 3. Compensated duty cycle calculation results of D50 and D65 light sources based on DE algorithm

LED	Duty cycle	30 ℃	50 ℃	70 ℃	90 ℃	110 ℃
D50	d_r	0.372	0.433	0.486	0.531	0.569
	d_g	0.393	0.358	0.291	0.204	0.111
	d_b	0.386	0.422	0.466	0.515	0.565
	d_y	0.572	0.631	0.714	0.818	0.936
D65	d_r	0.371	0.442	0.510	0.572	0.626
	d_g	0.564	0.546	0.491	0.410	0.316
	d_b	0.571	0.615	0.670	0.732	0.798
	d_y	0.582	0.632	0.708	0.808	0.927

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Xiangyan Zhou, Jianfei Li, Xiaoming Zhou. Research on LED Temperature Spectral Compensation Based on Visual and Non-Visual Effects[J]. Acta Optica Sinica, 2021, 41(19): 1933001

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Paper Information

Category: Vision, Color, and Visual Optics

Received: Feb. 22, 2021

Accepted: Apr. 16, 2021

Published Online: Oct. 29, 2021

The Author Email: Zhou Xiaoming (zhouxm@scut.edu.cn)

DOI:10.3788/AOS202141.1933001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. R¯2 value of Gaussian model, Gaussian-Lorentz model, and S-Gaussian model of four-color LED

Table 1. R¯2 value of Gaussian model, Gaussian-Lorentz model, and S-Gaussian model of four-color LED

Table 2. Comparison of model and experimental values of D50 and D65 light source parameters

Table 2. Comparison of model and experimental values of D50 and D65 light source parameters

Table 3. Compensated duty cycle calculation results of D50 and D65 light sources based on DE algorithm

Table 3. Compensated duty cycle calculation results of D50 and D65 light sources based on DE algorithm

Table 1. ${\bar{R}}^{2}$ value of Gaussian model, Gaussian-Lorentz model, and S-Gaussian model of four-color LED

Table 1. ${\bar{R}}^{2}$ value of Gaussian model, Gaussian-Lorentz model, and S-Gaussian model of four-color LED