Influence of LED Primary Colors on Color Matching Accuracy

Chunli Guo; Min Huang; Yonghui Xi; Jie Pan

doi:10.3788/AOS202040.1633001

Acta Optica Sinica, Volume. 40, Issue 16, 1633001(2020)

Influence of LED Primary Colors on Color Matching Accuracy

Chunli Guo, Min Huang^*, Yonghui Xi, and Jie Pan

Author Affiliations

School of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China

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Figures & Tables(13)

Fig. 1. Normalized spectral power distributions of the primary colors of the target and matched devices. (a) R channel; (b) G channel; (c) B channel

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Fig. 2. Color gamuts of the target and matched devices

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Fig. 3. Experimental related diagram. (a) Experimental setup; (b) LED-Panel and the controllers; (c) interface of software adjustment

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Fig. 4. Comparisons of the matched colors with different CMFs in different RGB combinations. (a) L1; (b) L2; (c) L3; (d) L4

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Fig. 5. Histograms of the Δ(u', v') values calculated by different color matching functions

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Fig. 6. Observer variability ellipses from different LED-RGB primary color combinations. (a) 5 colors; (b) white

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Fig. 7. Results from Ref. [15] with different primary-sets by CIE1964

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Table 1. Primary colors and colorimetric information of the target and matched devices

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Table 1. Primary colors and colorimetric information of the target and matched devices

Device	Primary	λ-measured /nm	FWHM /nm	x₁₀	y₁₀	u'₁₀	v'₁₀
Target device	NEC-R	652	90	0.64	0.33	0.45	0.52
	NEC-G	520	32	0.26	0.68	0.10	0.58
	NEC-B	444	21	0.15	0.10	0.16	0.23
Matched device	LED-R1	636	18	0.69	0.31	0.52	0.52
	LED-R2	672	20	0.71	0.29	0.57	0.51
	LED-G1	508	27	0.12	0.70	0.04	0.56
	LED-G2	524	31	0.24	0.72	0.08	0.58
	LED-B1	452	19	0.15	0.07	0.16	0.18
	LED-B2	472	22	0.11	0.18	0.09	0.33

Table 2. Colorimetric parameters of the target colors

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Table 2. Colorimetric parameters of the target colors

Colors	CIE recommended value			Measured value					Δ ${E_{ab}}^{*}$
Colors	$L_{10}^{*}$	$a_{10}^{*}$	$b_{10}^{*}$	$L_{10}^{*}$	$a_{10}^{*}$	$b_{10}^{*}$	u'₁₀	v'₁₀	Δ ${E_{ab}}^{*}$
White	-	-	-	-	-	-	0.21	0.49	-
Gray	62	0	0	62.42	0.11	-0.41	0.21	0.49	0.60
Red	44	37	23	43.91	36.49	22.95	0.32	0.51	0.52
Yellow	87	-7	47	87.25	-6.91	46.85	0.22	0.53	0.30
Green	56	-32	0	56.25	-32.16	-0.33	0.15	0.50	0.44
Blue	36	5	-31	36.49	4.56	-30.65	0.19	0.41	0.74

Table 3. Observer variations in the experiments

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Table 3. Observer variations in the experiments

LED-conbination	L1	L2	L3	L4
Intra-observer	R1-G2-B1	R2-G2-B1	R1-G1-B1	R1-G2-B2
Min	0.0017	0.0011	0.0018	0.0012
Max	0.0032	0.0032	0.0069	0.0032
Mean	0.0024	0.0024	0.0038	0.0024
Inter-observer	R1-G2-B1	R2-G2-B1	R1-G1-B1	R1-G2-B2
Min	0.0002	0.0002	0.0002	0.0005
Max	0.0188	0.0209	0.0241	0.0221
Mean	0.0039	0.0053	0.0069	0.0059

Table 4. Δ(u', v') values of each color from different LED-RGB combinations

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Table 4. Δ(u', v') values of each color from different LED-RGB combinations

Colors	L1	L2	L3	L4	Mean
White	0.0065	0.0075	0.0075	0.0085	0.0075
Gray	0.0054	0.0057	0.0063	0.0084	0.0065
Red	0.0070	0.0096	0.0080	0.0068	0.0079
Yellow	0.0050	0.0052	0.0073	0.0045	0.0055
Green	0.0057	0.0054	0.0083	0.0081	0.0069
Blue	0.0075	0.0068	0.0079	0.0138	0.0090
Mean	0.0062	0.0067	0.0076	0.0084	0.0072

Table 5. Parameters of the observer variability ellipses from different LED-RGB primary color combinations

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Table 5. Parameters of the observer variability ellipses from different LED-RGB primary color combinations

Color	Size					θ
Color	L1	L2	L3	L4	Mean	L1	L2	L3	L4
White	0.0039	0.0079	0.0085	0.0082	0.0071	68.35	51.42	127.00	139.41
Gray	0.0042	0.0060	0.0078	0.0090	0.0067	76.46	40.88	142.17	138.45
Red	0.0076	0.0085	0.0119	0.0075	0.0089	11.27	14.79	7.09	17.26
Yellow	0.0035	0.0069	0.0093	0.0052	0.0062	35.38	163.89	151.91	172.54
Green	0.0062	0.0076	0.0087	0.0077	0.0075	95.27	74.97	134.39	132.13
Blue	0.0075	0.0066	0.0099	0.0118	0.0089	71.58	84.23	99.53	139.03
Mean	0.0055	0.0072	0.0094	0.0082		-	-	-	-

Table 6. Comparison of the peak wavelength of the target and matched devices with different combinations
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Table 6. Comparison of the peak wavelength of the target and matched devices with different combinations
Combination ΔR /nm ΔG /nm ΔB /nm
L1 -16 4 8
L2 20 4 8
L3 -16 -12 8
L4 -16 4 28

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Chunli Guo, Min Huang, Yonghui Xi, Jie Pan. Influence of LED Primary Colors on Color Matching Accuracy[J]. Acta Optica Sinica, 2020, 40(16): 1633001

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Paper Information

Category: Vision, Color, and Visual Optics

Received: Mar. 9, 2020

Accepted: May. 14, 2020

Published Online: Aug. 7, 2020

The Author Email: Huang Min (huangmin@bigc.edu.cn)

DOI:10.3788/AOS202040.1633001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Primary colors and colorimetric information of the target and matched devices

Table 1. Primary colors and colorimetric information of the target and matched devices

Table 2. Colorimetric parameters of the target colors

Table 2. Colorimetric parameters of the target colors

Table 3. Observer variations in the experiments

Table 3. Observer variations in the experiments

Table 4. Δ(u', v') values of each color from different LED-RGB combinations

Table 4. Δ(u', v') values of each color from different LED-RGB combinations

Table 5. Parameters of the observer variability ellipses from different LED-RGB primary color combinations

Table 5. Parameters of the observer variability ellipses from different LED-RGB primary color combinations

Table 6. Comparison of the peak wavelength of the target and matched devices with different combinations

Table 6. Comparison of the peak wavelength of the target and matched devices with different combinations