Chinese Journal of Liquid Crystals and Displays, Volume. 40, Issue 3, 431(2025)
Influence of optical film on the color change of LED backlight
Fig. 1. （a） Blue LED board spectrum； （b） White LED board spectrum； （c） Full spectrum LED board spectrum.
Fig. 4. Spectra of white LED light board passing through DP and optical films
Fig. 5. （a） Composite film DOP； （b） Composite film MOP； （c） Composite film DPP； （d） Composite film POP.
Table 1. Luminous flux and color coordinate changes of white LED backlight
View tableView in ArticleTable 1. Luminous flux and color coordinate changes of white LED backlight
白光LED背光 ΔΦ/% ΔΦe/% Δx Δy DP/2000N40 -10.3 -12.6 0.005 5 0.007 7 DP/2000N40+DOP -18.6 -21.6 0.007 9 0.011 3 DP/2000N40+MOP -19.8 -23.2 0.009 0 0.013 1 DP/2000N40+DPP -21.9 -25.9 0.010 5 0.015 4 DP/2000N40+POP -21.2 -24.8 0.009 7 0.014 1
Table 2. Luminous flux and color coordinate changes of Mini LED light board+QD film backlight
View tableView in ArticleTable 2. Luminous flux and color coordinate changes of Mini LED light board+QD film backlight
COB蓝光Mini LED灯板+量子膜背光 ΔΦ/% ΔΦe/% Δx Δy DP/2000N40+EQ300E16+DOP 9.8 -14.7 0.027 4 0.051 6 DP/2000N40+EQ300E16+MOP 8.2 -18.5 0.033 0 0.059 8 DP/2000N40+EQ300E16+DPP 11.9 -22.7 0.049 2 0.084 7 DP/2000N40+EQ300E16+POP 12.5 -20.6 0.045 0 0.078 3
Table 3. Brightness and color coordinate changes of white LED backlight
View tableView in ArticleTable 3. Brightness and color coordinate changes of white LED backlight
白光LED背光 与灯板差距 与扩散板差距 Δx Δy ΔL/% Δx Δy DP/2000N40+DOP 0.007 1 0.013 6 55.8 0.000 8 0.001 6 DP/2000N40+MOP 0.008 8 0.015 6 73.5 0.002 5 0.003 5 DP/2000N40+DPP 0.010 0 0.018 7 91.1 0.003 7 0.006 6 DP/2000N40+POP 0.009 0 0.016 6 99.7 0.002 7 0.004 6
Table 4. Brightness and color coordinate changes of Mini LED light board+QD film backlight
View tableView in ArticleTable 4. Brightness and color coordinate changes of Mini LED light board+QD film backlight
COB蓝光Mini LED灯板+量子膜背光 ΔL/% Δx Δy DP/2000N40+EQ300E16 0.0 0 0 DP/2000N40+EQ300E16+DOP 112.9 0.039 0 0.081 6 DP/2000N40+EQ300E16+MOP 141.2 0.049 2 0.099 4 DP/2000N40+EQ300E16+DPP 187.9 0.069 7 0.132 0 DP/2000N40+EQ300E16+POP 196.9 0.063 9 0.121 2
Table 5. Solid angle and light output angle of LED backlight
View tableView in ArticleTable 5. Solid angle and light output angle of LED backlight
白光LED背光 计算立体角/sr 反推角度/（°） DP/1500N50 2.80 56 DP/2000N40 2.92 58 DP/2000N40+DOP 1.70 43 DP/2000N40+MOP 1.50 40 DP/2000N40+DPP 1.33 38 DP/2000N40+POP 1.28 37
Table 6. Optical changes of quantum films at different placement positions
View tableView in ArticleTable 6. Optical changes of quantum films at different placement positions
量子膜位置变更 L/（cd·m-2） x y DP/2000N40+DPP+EQ300E16 2 972 0.203 0 0.131 5 DP/2000N40+EQ300E16+DPP 4 225 0.258 3 0.227 7
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Wenkui ZHONG, Weihan LIN, Meihui YANG, Wendang HU, Peichuan XIE. Influence of optical film on the color change of LED backlight[J]. Chinese Journal of Liquid Crystals and Displays, 2025, 40(3): 431
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Received: Sep. 6, 2024
Accepted: --
Published Online: Apr. 27, 2025
The Author Email: Weihan LIN (linweihan@konka.com), Meihui YANG (ymhuifei@163.com)
