Temperature Spectrum Optimization of Mixed White LED Cluster Comprising Red/Green/Blue/Warm White LED

Huijuan Tian; Xinhua Zhang; Jin Zhang

doi:10.3788/AOS221760

Acta Optica Sinica, Volume. 43, Issue 9, 0930001(2023)

Temperature Spectrum Optimization of Mixed White LED Cluster Comprising Red/Green/Blue/Warm White LED

Huijuan Tian^1,2、*, Xinhua Zhang^1,2, and Jin Zhang^1,2

¹Tianjin Key Laboratory of Optoelectronic Detection Technology and System, School of Electronics and Information Engineering, Tiangong University, Tianjin 300387, China

²Engineering Research Center of Ministry of Education on High Power Solid State Lighting Application System, Tianjin 300387, China

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Figures & Tables(9)

Fig. 1. Schematic diagram of light source and experimental setup. (a) Light source; (b) experimental setup

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Fig. 2. Spectral power distribution of R/G/B/WW LED light source at different temperatures

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Fig. 3. Color rendering index of mixed white light at different correlated color temperatures. (a) 3000 K; (b) 5000 K; (c) 6500 K

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Fig. 4. Comparison between measured and model calculated results under different correlated color temperatures. (a) 3000 K; (b) 5000 K; (c) 6500 K

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Fig. 5. Measured parameter of light source under correlated color temperatures of 3000 K, 5000 K and 6500 K. (a) T_C and E_V; (b) C_AF and $η_{B}$

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Fig. 6. Comparison between measured and compensation model spectra under different correlated color temperatures. (a) 3000 K; (b) 5000 K; (c) 6500 K

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Table 1. Fitting coefficients of three models of R/G/B/WW four-color LED light source
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Table 1. Fitting coefficients of three models of R/G/B/WW four-color LED light source
Model R G B Part I in WW Part II in WW
Gaussian model 0.985 0.994 0.992 0.988 0.991
Gauss-Lorentz model 0.970 0.988 0.984 0.972 0.986
$B i g a u s s i a n$ model 0.972 0.991 0.989 0.992 0.996

Table 2. Comparison errors between experimental and model light source parameter values under correlated color temperatures of 3000 K, 5000 K and 6500 K

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Table 2. Comparison errors between experimental and model light source parameter values under correlated color temperatures of 3000 K, 5000 K and 6500 K

Correlated color temperature /K	Error in T_C /%	Error in E_V /%	Error in Ra /%	Error in C_AF /%	$E r r o r i n η_{B}$ /%
3000	3.79（70 ℃）	1.45（20 ℃）	3.25（30 ℃）	2.92（30 ℃）	2.94（80 ℃）
5000	2.67（70 ℃）	1.38（40 ℃）	2.10（20 ℃）	2.77（90 ℃）	3.66（90 ℃）
6500	1.56（90 ℃）	1.14（40 ℃）	2.66（80 ℃）	3.34（70 ℃）	2.52（90 ℃）

Table 3. Relative errors between measured values and set values at different correlated color temperatures and temperatures after compensation

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Table 3. Relative errors between measured values and set values at different correlated color temperatures and temperatures after compensation

Correlated color temperature /K	Set T /℃	Measured T_C /K	Relative error of T_C /%	Measured E_V /lx	Relative error of E_V /%	Measured C_AF	Relative error of C_AF /%	Measured $η_{B}$	Relative error of $η_{B}$ /%
3000	30	3109	0.98	83.99	0.51	0.4101	1.74	0.1001	1.62
	40	3119	0.66	83.55	1.03	0.4102	1.76	0.1002	1.73
	50	3131	0.26	83.51	1.07	0.4101	1.74	0.1003	1.83
	60	3140	0.12	83.18	1.47	0.4104	1.81	0.1001	1.62
	70	3164	0.79	82.91	1.79	0.4103	1.79	0.1002	1.73
	80	3175	1.12	82.74	1.99	0.4102	1.76	0.1002	1.73
	90	3199	1.91	82.43	2.35	0.4105	1.84	0.1003	1.83
5000	30	5098	0.42	92.90	0.13	0.7422	0.63	0.2169	1.40
	40	5112	0.09	92.70	0.40	0.7449	0.28	0.2173	1.59
	50	5128	0.22	92.00	1.07	0.7478	0.12	0.2178	1.82
	60	5145	0.41	92.70	0.38	0.7502	0.44	0.2184	2.10
	70	5154	0.69	92.10	1.06	0.7531	0.83	0.2187	2.24
	80	5169	1.09	92.50	0.53	0.7546	1.03	0.2192	2.47
	90	5189	1.48	92.90	0.06	0.7563	1.26	0.2195	2.62
6500	30	6517	0.99	99.70	1.36	0.9315	1.31	0.2718	0.80
	40	6526	0.85	99.30	0.98	0.9316	1.30	0.2724	0.58
	50	6554	0.43	98.60	0.30	0.9314	1.32	0.2729	0.40
	60	6571	0.18	97.60	0.75	0.9337	1.08	0.2734	0.22
	70	6596	0.21	98.80	0.42	0.9345	0.99	0.2737	0.11
	80	6627	0.68	97.50	0.85	0.9367	0.76	0.2741	0.04
	90	6653	1.07	97.00	1.34	0.9386	0.56	0.2746	0.22

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Huijuan Tian, Xinhua Zhang, Jin Zhang. Temperature Spectrum Optimization of Mixed White LED Cluster Comprising Red/Green/Blue/Warm White LED[J]. Acta Optica Sinica, 2023, 43(9): 0930001

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Paper Information

Category: Spectroscopy

Received: Sep. 27, 2022

Accepted: Nov. 25, 2022

Published Online: Apr. 25, 2023

The Author Email: Tian Huijuan (tianhjgx@126.com)

DOI:10.3788/AOS221760

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Fitting coefficients of three models of R/G/B/WW four-color LED light source

Table 1. Fitting coefficients of three models of R/G/B/WW four-color LED light source

Table 2. Comparison errors between experimental and model light source parameter values under correlated color temperatures of 3000 K, 5000 K and 6500 K

Table 2. Comparison errors between experimental and model light source parameter values under correlated color temperatures of 3000 K, 5000 K and 6500 K

Table 3. Relative errors between measured values and set values at different correlated color temperatures and temperatures after compensation

Table 3. Relative errors between measured values and set values at different correlated color temperatures and temperatures after compensation