Fig. 1. Color space decomposition on CIE 1976 UCS diagram

Fig. 2. Relative WPE of RGBO LED

Fig. 3. Weighting process of different three-primary-color groups

Fig. 4. Workflow of RGBO processing scheme

Fig. 5. LED panel. (a) Fabricated circuit; (b) color distribution

Fig. 6. Colors selected on CIE 1976 UCS diagram

Fig. 7. Experimental results of D65 white

Fig. 8. Weighting factors as a function of luminance

Fig. 9. Experiment results of RGGB LED and RGBO LED at brightness of 300 cd/m². (a) PSR; (b) chromatic aberration

Fig. 10. PSR and chromatic aberration of RGGB LED and RGBO LED solutions at different brightnesses. (a) (b) Brightness of 500 cd/m2; (c) (d) brightness of 600 cd/m2; (e) (f) brightness of 1000 cd/m2

Fig. 11. Color consistency of RGBO LED to RGB LED

Fig. 12. Distribution of natural image pixels in color gamut. (a) Partitioning color gamut on CIE 1976 UCS; (b) distribution of database images in 14 partitions