Acta Optica Sinica, Volume. 42, Issue 22, 2233001(2022)
Color Calculation Accuracy of LED Display Based on CIE1931 Color Matching Functions
Figures & Tables(11)
Fig. 2. Color gamut enclosed by the eight primary sets in the CIE1931 u'v' chromaticity diagram
Fig. 4. Distribution of visual color difference from 40 sample pairs for FOVs of 8.6° and 2.9°
Fig. 5. Visual color difference scattering dot distribution and linear fitting of 40 pair samples for FOVs of 8.6° and 2.9°
Table 1. Summary of the primary sets
View tableTable 1. Summary of the primary sets
Primary sets Shifted primaries
Correlated color temperature Color gamut area CIE1931 xy CIE1976 u'v' （CIE 1931 2°） chromaticity diagram chromaticity diagram L1 （R1-G2-B1） - 5002 0.1889 0.1087 L2 （R2-G2-B1） R2 4996 0.1969 0.1204 L3 （R1-G1-B1） G1 5003 0.1813 0.1109 L4 （R1-G2-B2） B2 4997 0.1773 0.0789 L5 （R1-G1-B2） G1 and B2 5003 0.1648 0.0780 L6 （R2-G2-B2） R2 and B2 4994 0.1849 0.0874 L7 （R2-G1-B1） R2 and G1 5001 0.1874 0.1218 L8 （R2-G1-B2） R2， G1， and B2 5006 0.1705 0.0857
Table 2. Scoring rules for visual color-difference evaluation experiments
View tableTable 2. Scoring rules for visual color-difference evaluation experiments
Color perception Category Visual color difference No difference 0 0-1 Just perceptible difference 1 1-2 Weak difference， which is ensured to exist 2 2-3 A little obvious difference， which is acceptable 3 3-4 Obvious difference， which is not acceptable 4 4-5
Table 3. Intra-observer and inter-observer variations in color difference evaluation experiments
View tableTable 3. Intra-observer and inter-observer variations in color difference evaluation experiments
Parameter Intra-observer Inter-observer FOV /（°） 8.6 2.9 8.6 2.9 Minimum 9.5 12.2 12.6 18.7 Maximum 24.2 34.6 51.2 59.6 Mean 16.3 22.6 28.3 36.9
Table 4. F test of influences of different primary sets on visual color difference
View tableTable 4. F test of influences of different primary sets on visual color difference
FOV /（°） L2 L3 L4 L5 L6 L7 L8 8.6 2.86 17.08 15.26 266.13 30.95 27.66 234.70 2.9 1.34 4.87 11.85 116.95 34.48 15.83 273.64
Table 5. Visual color difference for five colors in experiment
View tableTable 5. Visual color difference for five colors in experiment
FOV /（°） Gray Red Yellow Green Blue Mean 8.6 3.7 3.5 3.4 2.7 3.3 3.3 2.9 2.9 2.7 3.0 2.6 2.8 2.8
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Xinyuan Gao, Min Huang, Yu Wang, Yu Li, Xiu Li, Zimo Yan, Yanfang Xu, Yu Liu. Color Calculation Accuracy of LED Display Based on CIE1931 Color Matching Functions[J]. Acta Optica Sinica, 2022, 42(22): 2233001
Paper Information
Category: Vision, Color, and Visual Optics
Received: Apr. 11, 2022
Accepted: May. 23, 2022
Published Online: Nov. 7, 2022
The Author Email: Huang Min (huangmin@bigc.edu.cn)
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