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

Xiangyan Zhou; Jianfei Li; Xiaoming Zhou

doi:10.3788/AOS202141.1933001

Journals >Acta Optica Sinica >Volume 41 >Issue 19 >Page 1933001 > Article

Acta Optica Sinica
Vol. 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^*

Author Affiliations

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

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DOI: 10.3788/AOS202141.1933001 Cite this Article Set citation alerts

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 Copy Citation Text

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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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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 1.

{\bar{R}}^{2}

value of Gaussian model, Gaussian-Lorentz model, and S-Gaussian model of four-color LED

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

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

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

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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