Laser & Optoelectronics Progress, Volume. 59, Issue 11, 1133002(2022)
Research on Optical Color Mixing of Single Lamp Multi Display LED Intelligent Railway Signal
Figures & Tables(10)
Fig. 1. Area diagram of the railway signal light color. (a) Coordinate distribution of various colors of signal lights (b) local enlarged view of moon white light coordinates
Fig. 4. Hardware of PWM dimming simulation system. (a) Dimming plate; (b) remote control circuit
Fig. 5. Desired coordinate plot of moon white light. (a) Moon white light; (b) location of moon white light coordinates
Fig. 6. Shift of moon white light chromaticity coordinates with operating temperature
Table 1. Coordinate values of color boundary intersection of moon white railway signal lights
View tableTable 1. Coordinate values of color boundary intersection of moon white railway signal lights
Coordinate I J J´ K´ K L 0.300 0.440 0.470 0.470 0.440 0.300 0.342 0.432 0.436 0.382 0.382 0.276
Table 2. Photometric parameters of RGB lamp beads
View tableTable 2. Photometric parameters of RGB lamp beads
LED Luminousflux /lm Main wavelength /nm Voltage /V Red 0.701 0.298 196 625 2.35 Green 0.155 0.806 420 530 3.48 Blue 0.153 0.021 100 453 3.00
Table 3. Shift of chromaticity parameters with temperature
View tableTable 3. Shift of chromaticity parameters with temperature
Temperature /℃ DR DG DB x y Relative color temperature /K Chromatic aberration /NBS Whether it exceeds the standard or not？ -40 0.316 0.320 0.041 0.353 0.352 4748 17.18 yes -30 0.312 0.322 0.042 0.349 0.350 4870 15.15 yes -20 0.309 0.323 0.043 0.347 0.350 4948 13.69 yes -10 0.303 0.325 0.043 0.343 0.349 5088 11.10 yes 0 0.296 0.329 0.044 0.339 0.350 5280 7.22 yes 10 0.288 0.332 0.044 0.334 0.350 5465 3.12 yes 20 0.280 0.336 0.045 0.328 0.349 5704 0.69 yes 30 0.270 0.340 0.046 0.322 0.349 5984 4.47 yes 40 0.256 0.346 0.048 0.313 0.348 6385 8.58 yes 50 0.243 0.352 0.049 0.305 0.349 6772 12.08 no 60 0.228 0.359 0.051 0.296 0.348 7254 14.40 no 70 0.215 0.364 0.052 0.287 0.346 7767 16.00 no 80 0.203 0.370 0.054 0.279 0.345 8255 17.41 no
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Qing He, Yuefei Du, Kangxiao Zhao. Research on Optical Color Mixing of Single Lamp Multi Display LED Intelligent Railway Signal[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1133002
Paper Information
Category: Vision, Color, and Visual Optics
Received: Jul. 23, 2021
Accepted: Sep. 13, 2021
Published Online: Jun. 9, 2022
The Author Email: Qing He (1900309985@qq.com)
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