Abstract

The luminance uniformity of the backlight module (BLM) importantly depends on the microstructure distribution on the bottom surface of the light guide plate (LGP). Based on the small-size integrated LGP (ILGP) proposed, we put forward a distribution expression of micro-prisms on the bottom surface of the ILGP, and present the relational expressions between the coefficients of the analytical expression and the structural parameters of the ILGP, such as the light guide length L, width of the ILGP W, thickness of the ILGP H, and space between light emitting diodes (LEDs) d. Then, the research results above are applied to the design of the small-size ILGPs. Not only can the micro-structure distributions on the bottom surface of the ILGPs be directly given, but also the simulation results show that the luminance uniformities of the integrated BLMs are higher than 85%. The research indicates that the expressions proposed in this paper are correct and effective, and have important guiding significances and referential value.

© 2015 Optical Society of America

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References

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  1. K. S. Ha, “Backlight of a liquid crystal display device,” United States Patent, US6443583B1 (2002).
  2. C. J. Li, Y. C. Fang, W. T. Chu, and M. C. Cheng, “Optimization of light guide plate with microstructures for extra light modern backlight module,” Jpn. J. Appl. Phys. 47(8), 6683–6687 (2008).
    [Crossref]
  3. C. J. Li, Y. C. Fang, and M. C. Cheng, “Study of optimization of an LCD light guide plate with neural network and genetic algorithm,” Opt. Express 17(12), 10177–10188 (2009).
    [Crossref] [PubMed]
  4. H. Zhao and S. P. Fang, “Generation of dot patterns for light guides using ANFIS,” Infrared Laser Eng. 38, 125–129 (2009). (in Chinese)
  5. J. C. Yu and P. K. Hsu, “Integration of stamper fabrication and design optimization of LCD Light guides using silicon-based microfeatures,” Microsyst. Technol. 16(7), 1193–1200 (2010).
    [Crossref]
  6. P. Xu, Y. Y. Huang, Z. Su, and X. L. Zhang, “Algorithm research on microstructure distribution on the bottom surface of an integrated micro-optical light guide plate,” Appl. Opt. 53(7), 1322–1327 (2014).
    [PubMed]
  7. J. Z. Luo, Z. Chen, Y. L. Zhang, F. L. Li, and C. Cai, “Design and simulation analysis of scattering netted dots on edge-lighting flat light guide plate,” Chin. J. Liq. Cryst. Disp. 21(3), 206–213 (2006). (in Chinese)
  8. Y. C. Kim, T. S. Oh, and Y. M. Lee, “Optimized pattern design of light-guide plate (LGP),” Optica Applicata 41(4), 863–872 (2011).
  9. J. J. Zhi, M. Q. Liang, E. Z. Chen, Y. C. Che, and Q. R. Zhuang, “Dot-pattern design of LED light guide plate with single edge lighting,” China Illumin. Eng. J. 23(6), 60–63 (2012). (in Chinese)
  10. Y. C. Kim, “Optimize pattern design for the thin LGP,” Optik (Stuttg.) 124(15), 2171–2173 (2013).
    [Crossref]
  11. P. Xu, Y. Y. Huang, X. L. Zhang, J. F. Huang, B. B. Li, E. Ye, S. F. Duan, and Z. J. Su, “Integrated micro-optical light guide plate,” Opt. Express 21(17), 20159–20170 (2013).
    [Crossref] [PubMed]
  12. H. X. Huang, S. C. Ruan, T. Yang, and P. Xu, “Novel even beam splitters based on subwavelength binary simple periodic rectangular structure,” Nano-Micro Lett. 7(25) 1–6 (2015).

2015 (1)

H. X. Huang, S. C. Ruan, T. Yang, and P. Xu, “Novel even beam splitters based on subwavelength binary simple periodic rectangular structure,” Nano-Micro Lett. 7(25) 1–6 (2015).

2014 (1)

2013 (2)

2012 (1)

J. J. Zhi, M. Q. Liang, E. Z. Chen, Y. C. Che, and Q. R. Zhuang, “Dot-pattern design of LED light guide plate with single edge lighting,” China Illumin. Eng. J. 23(6), 60–63 (2012). (in Chinese)

2011 (1)

Y. C. Kim, T. S. Oh, and Y. M. Lee, “Optimized pattern design of light-guide plate (LGP),” Optica Applicata 41(4), 863–872 (2011).

2010 (1)

J. C. Yu and P. K. Hsu, “Integration of stamper fabrication and design optimization of LCD Light guides using silicon-based microfeatures,” Microsyst. Technol. 16(7), 1193–1200 (2010).
[Crossref]

2009 (2)

H. Zhao and S. P. Fang, “Generation of dot patterns for light guides using ANFIS,” Infrared Laser Eng. 38, 125–129 (2009). (in Chinese)

C. J. Li, Y. C. Fang, and M. C. Cheng, “Study of optimization of an LCD light guide plate with neural network and genetic algorithm,” Opt. Express 17(12), 10177–10188 (2009).
[Crossref] [PubMed]

2008 (1)

C. J. Li, Y. C. Fang, W. T. Chu, and M. C. Cheng, “Optimization of light guide plate with microstructures for extra light modern backlight module,” Jpn. J. Appl. Phys. 47(8), 6683–6687 (2008).
[Crossref]

2006 (1)

J. Z. Luo, Z. Chen, Y. L. Zhang, F. L. Li, and C. Cai, “Design and simulation analysis of scattering netted dots on edge-lighting flat light guide plate,” Chin. J. Liq. Cryst. Disp. 21(3), 206–213 (2006). (in Chinese)

Cai, C.

J. Z. Luo, Z. Chen, Y. L. Zhang, F. L. Li, and C. Cai, “Design and simulation analysis of scattering netted dots on edge-lighting flat light guide plate,” Chin. J. Liq. Cryst. Disp. 21(3), 206–213 (2006). (in Chinese)

Che, Y. C.

J. J. Zhi, M. Q. Liang, E. Z. Chen, Y. C. Che, and Q. R. Zhuang, “Dot-pattern design of LED light guide plate with single edge lighting,” China Illumin. Eng. J. 23(6), 60–63 (2012). (in Chinese)

Chen, E. Z.

J. J. Zhi, M. Q. Liang, E. Z. Chen, Y. C. Che, and Q. R. Zhuang, “Dot-pattern design of LED light guide plate with single edge lighting,” China Illumin. Eng. J. 23(6), 60–63 (2012). (in Chinese)

Chen, Z.

J. Z. Luo, Z. Chen, Y. L. Zhang, F. L. Li, and C. Cai, “Design and simulation analysis of scattering netted dots on edge-lighting flat light guide plate,” Chin. J. Liq. Cryst. Disp. 21(3), 206–213 (2006). (in Chinese)

Cheng, M. C.

C. J. Li, Y. C. Fang, and M. C. Cheng, “Study of optimization of an LCD light guide plate with neural network and genetic algorithm,” Opt. Express 17(12), 10177–10188 (2009).
[Crossref] [PubMed]

C. J. Li, Y. C. Fang, W. T. Chu, and M. C. Cheng, “Optimization of light guide plate with microstructures for extra light modern backlight module,” Jpn. J. Appl. Phys. 47(8), 6683–6687 (2008).
[Crossref]

Chu, W. T.

C. J. Li, Y. C. Fang, W. T. Chu, and M. C. Cheng, “Optimization of light guide plate with microstructures for extra light modern backlight module,” Jpn. J. Appl. Phys. 47(8), 6683–6687 (2008).
[Crossref]

Duan, S. F.

Fang, S. P.

H. Zhao and S. P. Fang, “Generation of dot patterns for light guides using ANFIS,” Infrared Laser Eng. 38, 125–129 (2009). (in Chinese)

Fang, Y. C.

C. J. Li, Y. C. Fang, and M. C. Cheng, “Study of optimization of an LCD light guide plate with neural network and genetic algorithm,” Opt. Express 17(12), 10177–10188 (2009).
[Crossref] [PubMed]

C. J. Li, Y. C. Fang, W. T. Chu, and M. C. Cheng, “Optimization of light guide plate with microstructures for extra light modern backlight module,” Jpn. J. Appl. Phys. 47(8), 6683–6687 (2008).
[Crossref]

Hsu, P. K.

J. C. Yu and P. K. Hsu, “Integration of stamper fabrication and design optimization of LCD Light guides using silicon-based microfeatures,” Microsyst. Technol. 16(7), 1193–1200 (2010).
[Crossref]

Huang, H. X.

H. X. Huang, S. C. Ruan, T. Yang, and P. Xu, “Novel even beam splitters based on subwavelength binary simple periodic rectangular structure,” Nano-Micro Lett. 7(25) 1–6 (2015).

Huang, J. F.

Huang, Y. Y.

Kim, Y. C.

Y. C. Kim, “Optimize pattern design for the thin LGP,” Optik (Stuttg.) 124(15), 2171–2173 (2013).
[Crossref]

Y. C. Kim, T. S. Oh, and Y. M. Lee, “Optimized pattern design of light-guide plate (LGP),” Optica Applicata 41(4), 863–872 (2011).

Lee, Y. M.

Y. C. Kim, T. S. Oh, and Y. M. Lee, “Optimized pattern design of light-guide plate (LGP),” Optica Applicata 41(4), 863–872 (2011).

Li, B. B.

Li, C. J.

C. J. Li, Y. C. Fang, and M. C. Cheng, “Study of optimization of an LCD light guide plate with neural network and genetic algorithm,” Opt. Express 17(12), 10177–10188 (2009).
[Crossref] [PubMed]

C. J. Li, Y. C. Fang, W. T. Chu, and M. C. Cheng, “Optimization of light guide plate with microstructures for extra light modern backlight module,” Jpn. J. Appl. Phys. 47(8), 6683–6687 (2008).
[Crossref]

Li, F. L.

J. Z. Luo, Z. Chen, Y. L. Zhang, F. L. Li, and C. Cai, “Design and simulation analysis of scattering netted dots on edge-lighting flat light guide plate,” Chin. J. Liq. Cryst. Disp. 21(3), 206–213 (2006). (in Chinese)

Liang, M. Q.

J. J. Zhi, M. Q. Liang, E. Z. Chen, Y. C. Che, and Q. R. Zhuang, “Dot-pattern design of LED light guide plate with single edge lighting,” China Illumin. Eng. J. 23(6), 60–63 (2012). (in Chinese)

Luo, J. Z.

J. Z. Luo, Z. Chen, Y. L. Zhang, F. L. Li, and C. Cai, “Design and simulation analysis of scattering netted dots on edge-lighting flat light guide plate,” Chin. J. Liq. Cryst. Disp. 21(3), 206–213 (2006). (in Chinese)

Oh, T. S.

Y. C. Kim, T. S. Oh, and Y. M. Lee, “Optimized pattern design of light-guide plate (LGP),” Optica Applicata 41(4), 863–872 (2011).

Ruan, S. C.

H. X. Huang, S. C. Ruan, T. Yang, and P. Xu, “Novel even beam splitters based on subwavelength binary simple periodic rectangular structure,” Nano-Micro Lett. 7(25) 1–6 (2015).

Su, Z.

Su, Z. J.

Xu, P.

Yang, T.

H. X. Huang, S. C. Ruan, T. Yang, and P. Xu, “Novel even beam splitters based on subwavelength binary simple periodic rectangular structure,” Nano-Micro Lett. 7(25) 1–6 (2015).

Ye, E.

Yu, J. C.

J. C. Yu and P. K. Hsu, “Integration of stamper fabrication and design optimization of LCD Light guides using silicon-based microfeatures,” Microsyst. Technol. 16(7), 1193–1200 (2010).
[Crossref]

Zhang, X. L.

Zhang, Y. L.

J. Z. Luo, Z. Chen, Y. L. Zhang, F. L. Li, and C. Cai, “Design and simulation analysis of scattering netted dots on edge-lighting flat light guide plate,” Chin. J. Liq. Cryst. Disp. 21(3), 206–213 (2006). (in Chinese)

Zhao, H.

H. Zhao and S. P. Fang, “Generation of dot patterns for light guides using ANFIS,” Infrared Laser Eng. 38, 125–129 (2009). (in Chinese)

Zhi, J. J.

J. J. Zhi, M. Q. Liang, E. Z. Chen, Y. C. Che, and Q. R. Zhuang, “Dot-pattern design of LED light guide plate with single edge lighting,” China Illumin. Eng. J. 23(6), 60–63 (2012). (in Chinese)

Zhuang, Q. R.

J. J. Zhi, M. Q. Liang, E. Z. Chen, Y. C. Che, and Q. R. Zhuang, “Dot-pattern design of LED light guide plate with single edge lighting,” China Illumin. Eng. J. 23(6), 60–63 (2012). (in Chinese)

Appl. Opt. (1)

Chin. J. Liq. Cryst. Disp. (1)

J. Z. Luo, Z. Chen, Y. L. Zhang, F. L. Li, and C. Cai, “Design and simulation analysis of scattering netted dots on edge-lighting flat light guide plate,” Chin. J. Liq. Cryst. Disp. 21(3), 206–213 (2006). (in Chinese)

China Illumin. Eng. J. (1)

J. J. Zhi, M. Q. Liang, E. Z. Chen, Y. C. Che, and Q. R. Zhuang, “Dot-pattern design of LED light guide plate with single edge lighting,” China Illumin. Eng. J. 23(6), 60–63 (2012). (in Chinese)

Infrared Laser Eng. (1)

H. Zhao and S. P. Fang, “Generation of dot patterns for light guides using ANFIS,” Infrared Laser Eng. 38, 125–129 (2009). (in Chinese)

Jpn. J. Appl. Phys. (1)

C. J. Li, Y. C. Fang, W. T. Chu, and M. C. Cheng, “Optimization of light guide plate with microstructures for extra light modern backlight module,” Jpn. J. Appl. Phys. 47(8), 6683–6687 (2008).
[Crossref]

Microsyst. Technol. (1)

J. C. Yu and P. K. Hsu, “Integration of stamper fabrication and design optimization of LCD Light guides using silicon-based microfeatures,” Microsyst. Technol. 16(7), 1193–1200 (2010).
[Crossref]

Nano-Micro Lett. (1)

H. X. Huang, S. C. Ruan, T. Yang, and P. Xu, “Novel even beam splitters based on subwavelength binary simple periodic rectangular structure,” Nano-Micro Lett. 7(25) 1–6 (2015).

Opt. Express (2)

Optica Applicata (1)

Y. C. Kim, T. S. Oh, and Y. M. Lee, “Optimized pattern design of light-guide plate (LGP),” Optica Applicata 41(4), 863–872 (2011).

Optik (Stuttg.) (1)

Y. C. Kim, “Optimize pattern design for the thin LGP,” Optik (Stuttg.) 124(15), 2171–2173 (2013).
[Crossref]

Other (1)

K. S. Ha, “Backlight of a liquid crystal display device,” United States Patent, US6443583B1 (2002).

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Figures (8)

Fig. 1
Fig. 1 Diagram of the integrated BLM.
Fig. 2
Fig. 2 Variables relationship diagram of the micro-prism distribution expression of the ILGP.
Fig. 3
Fig. 3 The curve between coefficients and H for high luminance uniformities.
Fig. 4
Fig. 4 The curve between A and H when L = L0.
Fig. 5
Fig. 5 The curve of luminance uniformities with various d/d0.
Fig. 6
Fig. 6 Luminance uniformities of the integrated BLMs with different structural parameters.
Fig. 7
Fig. 7 Efficiencies of light energy utilization of the integrated BLMs with different structural parameters.
Fig. 8
Fig. 8 Diagram of (a) luminance, and (b) angular luminance of the output light in the ILGP with L = 93.6mm, and H = 0.5mm.

Tables (7)

Tables Icon

Table 1 Structural parameters of the integrated BLM

Tables Icon

Table 2 Relationship between coefficients in Eq. (1) and L

Tables Icon

Table 3 Relationship between coefficients in Eq. (1) and W

Tables Icon

Table 4 Relationship between ΔA and ΔH

Equations (14)

Equations on this page are rendered with MathJax. Learn more.

Δx=A+Bx+C x 2 .
A=0.04875+0.01514×L,
B=0.01040.000112727×L+2.23683× 10 7 × L 2 ,
C=5.5× 10 5 .
α( L )= A( L,H )A( L, H 0 ) A( L 0 ,H )A( L 0 , H 0 ) .
α( L )=0.09167+0.01761×L
A( L 0 ,H )=1.564421.72381×H+0.80571× H 2 0.13333× H 3 .
A( L,H )= a 1 + a 2 L+ a 3 H+ a 4 H 2 + a 5 H 3 + a 6 LH+ a 7 L H 2 + a 8 L H 3 .
B( L,H )= b 1 + b 2 L+ b 3 L 2 + b 4 H+ b 5 H 2 + b 6 H 3 + b 7 LH+ b 8 L H 2 + b 9 L H 3 .
C( L,H )={ c 1 + c 2 H+ c 3 H 2 ,61.9mmL126.8mm c 1 + c 2 H+ c 3 H 2 ,126.8mmL155.8mm .
Δx=A+Bx+C x 2 ,
A( L,H )= a 1 + a 2 L+ a 3 H+ a 4 H 2 + a 5 H 3 + a 6 LH+ a 7 L H 2 + a 8 L H 3 ,
B( L,H )= b 1 + b 2 L+ b 3 L 2 + b 4 H+ b 5 H 2 + b 6 H 3 + b 7 LH+ b 8 L H 2 + b 9 L H 3 ,
C( L,H )={ c 1 + c 2 H+ c 3 H 2 ,61.9mmL126.8mm c 1 + c 2 H+ c 3 H 2 ,126.8mmL155.8mm .

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