Chinese Optics Letters, Volume. 13, Issue 3, 032302(2015)
Design of a backlight module with a freeform surface by applying the Taguchi method
Figures & Tables(9)
Fig. 1. Direct type LED backlight module (a) traditional structure; (b) new structure with a freeform surface.
Fig. 3. S/N ratios of (a) uniformity and (b) luminance at different levels.
Fig. 4. Relationship between the luminance and the thickness of the cavity.
Fig. 5. Luminance map of the backlight module with optimized parameters.
Table 1. Control Factors and Levels for Backlight Module Quality
View tableView in ArticleTable 1. Control Factors and Levels for Backlight Module Quality
Symbol Parameter Description Number of Levels Level 1 Level 2 Level 3 A Microstructure 3 no Cone Cylinder B Light mixing distance 3 38 30 25 C Arrangement of LEDs 3 Triangle Square Hexagon D Mounting angle of LEDs 3 0° 50° 90°
Table 2. Experiments Designed with a L9(34) Orthogonal Array
View tableView in ArticleTable 2. Experiments Designed with a L9(34) Orthogonal Array
Experiment Number A B C D Uniformity Luminance (nits) S/N of Uniformity S/N of Luminance 1 1 1 1 1 55.64 6890.07 34.91 76.76 2 1 2 2 2 66.86 7181.67 36.50 77.12 3 1 3 3 3 68.50 7322.62 36.71 77.29 4 2 1 2 3 61.96 6881.79 35.84 76.75 5 2 2 3 1 67.94 7536.03 36.64 77.54 6 2 3 1 2 63.59 7204.62 36.07 77.15 7 3 1 3 2 65.93 7127.34 36.38 77.06 8 3 2 1 3 64.00 7139.51 36.12 77.07 9 3 3 2 1 66.44 7522.38 36.45 77.53
Table 3. ANOVA Results of Uniformity and Luminance
View tableView in ArticleTable 3. ANOVA Results of Uniformity and Luminance
Factor A B C D Uniformity 0.11 1.00 1.19 0.16 Contribution (%) 4.65 40.46 48.36 6.53 Luminance 0.04 0.37 0.14 0.09 Contribution (%) 5.98 58.53 21.46 14.03
Table 4. Luminance of the Backlight Module with Optimized Parameters in a Nine-Point Test
View tableView in ArticleTable 4. Luminance of the Backlight Module with Optimized Parameters in a Nine-Point Test
0 165 223 7318.554 7388.185 7229.667 0 8062.3365 8655.6785 8142.987 7299.869 7460.407 7502.769
Tools
Get Citation
Copy Citation Text
Yingcong Chen, Shangsheng Wen, Pengcheng Song, "Design of a backlight module with a freeform surface by applying the Taguchi method," Chin. Opt. Lett. 13, 032302 (2015)
Paper Information
Category: Optical devices
Received: Oct. 14, 2014
Accepted: Dec. 22, 2014
Published Online: Sep. 25, 2018
The Author Email: Shangsheng Wen (shshwen@scut.edu.cn)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20