Color Matching and Real-Time Color Temperature Control in Laser Display

Fig. 1. Influence of three primary color light (R 638 nm, G 520 nm, B 450 nm) power variating 10% on the parameters of mixed white light (D65). (a) Influence on color temperature and luminous flux; (b) influence on chromaticity coordinates

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Fig. 2. Influence of three primary color light (R 638 nm, G 520 nm, B 450 nm) center wavelength variating ±5 nm on the parameters of mixed white light (D65). (a) Influence on color temperature and luminous flux; (b) influence on chromaticity coordinates

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Fig. 3. Influence of three primary color light (R 638 nm, G 520 nm, B 450 nm) spectrum width changing from 1 nm to 10 nm on the parameters of mixed white light (D65). (a) Influence on color temperature and luminous flux; (b) influence on chromaticity coordinates

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Fig. 4. Schematic of real-time color temperature control experiment

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Fig. 5. Real-time color temperature control experiment. (a) Luminace and error between measurement and target values of color temperature; (b) error between measurement and target values of color coordinates

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Fig. 6. Simulated real-time color temperature control in the process of reducing the green laser power from 100% to 80%. (a) Color temperature and luminace; (b) color coordinates

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Fig. 7. Real-time color temperature control in the process of temperature ranging from 15 ℃ to 35 ℃. (a) Color temperature and luminance; (b) color coordinates

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Table 1. Tristimulus values of RGB laser (CIE 1931 2°, CIE 1964 10°)

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Table 1. Tristimulus values of RGB laser (CIE 1931 2°, CIE 1964 10°)

Central wavelength	Tristimulus values (CIE 1931 2°)			Tristimulus values (CIE 1964 10°)
Central wavelength	$\begin{matrix} {\bar{x}}_{2} \end{matrix}$	$\begin{matrix} {\bar{y}}_{2} \end{matrix}$	$\begin{matrix} {\bar{z}}_{2} \end{matrix}$	$\begin{matrix} {\bar{x}}_{10} \end{matrix}$	$\begin{matrix} {\bar{y}}_{10} \end{matrix}$	$\begin{matrix} {\bar{z}}_{10} \end{matrix}$
R(638 nm)	0.48474	0.19116	0.00002	0.47108	0.19807	0.00000
G(532 nm)	0.18914	0.88496	0.03694	0.26297	0.89537	0.02586
G(520 nm)	0.06327	0.71000	0.07825	0.11775	0.76176	0.06071
B(450 nm)	0.33620	0.03800	1.77211	0.37070	0.08946	1.99480

Table 2. Color proportion of RGB laser in CIE 1931 XYZ standard

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Table 2. Color proportion of RGB laser in CIE 1931 XYZ standard

Central wavelength	Chromaticity coordinate	r_R	r_G	r_B	K_W /(lm·W^-1)
R(638 nm)	D55 (0.3324,0.3474)	0.511	0.328	0.161	230.1
G(520 nm)	D65 (0.3127,0.3290)	0.479	0.331	0.190	227.8
B(450 nm)	D75 (0.2990,0.3149)	0.455	0.331	0.214	225.5
R(638 nm)	D55 (0.3324,0.3474)	0.495	0.314	0.191	259.5
G(532 nm)	D65 (0.3127,0.3290)	0.459	0.316	0.225	257.1
B(450 nm)	D75 (0.2990,0.3149)	0.432	0.317	0.251	254.5

Table 3. Color proportion of RGB laser in CIE 1964 XYZ standard

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Table 3. Color proportion of RGB laser in CIE 1964 XYZ standard

Central wavelength	Chromaticity coordinate	r_R	r_G	r_B	K_W /(lm·W^-1)
R(638 nm)	D55 (0.3341,0.3488)	0.530	0.316	0.154	245.4
G(520 nm)	D65 (0.3138,0.3310)	0.497	0.320	0.183	244.8
B(450 nm)	D75 (0.2997,0.3174)	0.473	0.321	0.206	243.7
R(638 nm)	D55 (0.3341,0.3488)	0.506	0.319	0.175	270.0
G(532 nm)	D65 (0.3138,0.3310)	0.469	0.324	0.207	269.7
B(450 nm)	D75 (0.2997,0.3174)	0.441	0.326	0.233	268.6

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Sun Minyuan, Zhu Jianying, Bi Yong, Yuan Yuan, Zhang Shuo, Zhang Wenping. Color Matching and Real-Time Color Temperature Control in Laser Display[J]. Chinese Journal of Lasers, 2020, 47(7): 704001

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Paper Information

Category: Measurement and metrology

Received: Nov. 6, 2019

Accepted: --

Published Online: Jul. 10, 2020

The Author Email: Yong Bi (biyong@mail.ipc.ac.cn)

DOI:10.3788/CJL202047.0704001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology