Abstract

Liquid crystal displays are playing a crucial role in current information era. Many of them are edgelit, where light is produced by a light source at the edge of the display and is spread out to illuminate the entire display through a light waveguide plate (LWGP). We developed a novel polarizing LWGP from polymer stabilized nematic liquid crystal, which can convert the unploarized light produced by the edgelight into linearly polarized light. This LWGP selectively scatters light depending on the polarization. When a light propagates through the LWGP, it will be scattered out of the plate if its polarization is parallel to the direction of the liquid crystal but will not be scattered if its polarization is perpendicular to the liquid crystal. This polarizing LWGP can greatly improve the light efficiency of edgelight liquid crystal displays.

© 2015 Optical Society of America

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References

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  1. E. Lueder, Liquid Crystal Displays, 2nd edition (John Wiley and Sons, Ltd., 2010).
  2. D.-K. Yang and S.-T. Wu, Fundamentals of Liquid Crystal Devices, 2nd edition (Malaysia, 2015).
  3. S. Kobayashi, S. Mikoshiba, and S. Lim, LCD Backlights (John Wiley and Sons, 2009).
  4. K. Käläntär, S. Matsumoto, T. Onishi, and K. Takizawa, “Optical micro deflector based functional light-guide plate for backlight unit,” SID Tech. Digest 31(1), 1029–1031 (2000).
    [Crossref]
  5. C.-J. Li, Y.-C. Fang, W.-T. Chu, and M.-C. Cheng, “Design of a prism light-guide plate for an LCD backlight module,” Journal of the SID 16, 545–550 (2008).
  6. H. J. B. Jagt, H. J. Cornelissen, D. J. Broer, and C. W. M. Bastiaansen, “Micro-structured polymeric linearly, polarized light emitting lightguide for LCD Illumination,” Dig. Tech. Pap. 33(1), 1236 (2002).
    [Crossref]
  7. Z. Luo and S. T. Wu, “Polarization-preserving light guide plate for a linearly polarized backlight,” J. Display Tech. 10(3), 208–214 (2014).
    [Crossref]
  8. J. Kimmel, “Diffractive backlight technologies for mobile applications,” J. Soc. Inf. Disp. 20(5), 245 (2012).
    [Crossref]
  9. H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).
  10. S. M. P. Blom, H. P. M. Huck, H. J. Cornelissen, and H. Greiner, “Towards a polarized light-emitting backlight: micro-structured anisotropic layers,” Journal of the SID 10, 209–213 (2002).
  11. D. J. Broer, R. G. Gossink, and R. A. M. Hikmet, “Die Angewandte,” Makromol. Chem. 183(1), 45–66 (1990).
    [Crossref]
  12. R. A. M. Hikmet, Liquid Crystals in Complex Geometries, G. P. Crawford and S. Zumer, eds. (Taylor & Francis, 1996) Chapter 3, pp. 53–82.
  13. D. J. Broer, Liquid Crystals in Complex Geometries, G. P. Crawford and S. Zumer, eds. (Taylor & Francis, 1996), Chapter 4, 239–255.
  14. D.-K. Yang, L.-C. Chien, and Y. K. Fung, Liquid Crystals in Complex Geometries, G.P. Crawford and S. Zumer, eds. (Taylor & Francis, 1996), Chapter 5, pp. 103–143.
  15. R. A. M. Hikmet, “Anisotropic gels and plasticized networks formed by liquid crystal molecules,” Liq. Cryst 9(3), 405–416 (1991).
    [Crossref]
  16. R. A. M. Hikmet and H. M. J. Boots, “Domain structure and switching behavior of anisotropic gels,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 51(6), 5824–5831 (1995).
    [Crossref] [PubMed]
  17. D.-K. Yang, “Polymer stabilized liquid crystal displays,” Progress in Liquid Crystal Science and Technology, H-S. Kwok, S. Naemura and H. L. Ong, eds. (World Scientific, 2012).
  18. D.-K. Yang, Y. Cui, H. Nemati, X.-C. Zhou, and A. Moheghi, “Modeling aligning effect of polymer network in polymer stabilized nematic liquid crystals,” J. Appl. Phys. 114(24), 243515 (2013).
    [Crossref]
  19. R. Q. Ma and D.-K. Yang, “Freedericksz transition in polymer-stabilized nematic liquid crystals,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 61(2), 1567–1573 (2000).
    [Crossref] [PubMed]

2014 (1)

Z. Luo and S. T. Wu, “Polarization-preserving light guide plate for a linearly polarized backlight,” J. Display Tech. 10(3), 208–214 (2014).
[Crossref]

2013 (1)

D.-K. Yang, Y. Cui, H. Nemati, X.-C. Zhou, and A. Moheghi, “Modeling aligning effect of polymer network in polymer stabilized nematic liquid crystals,” J. Appl. Phys. 114(24), 243515 (2013).
[Crossref]

2012 (1)

J. Kimmel, “Diffractive backlight technologies for mobile applications,” J. Soc. Inf. Disp. 20(5), 245 (2012).
[Crossref]

2008 (1)

C.-J. Li, Y.-C. Fang, W.-T. Chu, and M.-C. Cheng, “Design of a prism light-guide plate for an LCD backlight module,” Journal of the SID 16, 545–550 (2008).

2004 (1)

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

2002 (2)

S. M. P. Blom, H. P. M. Huck, H. J. Cornelissen, and H. Greiner, “Towards a polarized light-emitting backlight: micro-structured anisotropic layers,” Journal of the SID 10, 209–213 (2002).

H. J. B. Jagt, H. J. Cornelissen, D. J. Broer, and C. W. M. Bastiaansen, “Micro-structured polymeric linearly, polarized light emitting lightguide for LCD Illumination,” Dig. Tech. Pap. 33(1), 1236 (2002).
[Crossref]

2000 (2)

K. Käläntär, S. Matsumoto, T. Onishi, and K. Takizawa, “Optical micro deflector based functional light-guide plate for backlight unit,” SID Tech. Digest 31(1), 1029–1031 (2000).
[Crossref]

R. Q. Ma and D.-K. Yang, “Freedericksz transition in polymer-stabilized nematic liquid crystals,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 61(2), 1567–1573 (2000).
[Crossref] [PubMed]

1995 (1)

R. A. M. Hikmet and H. M. J. Boots, “Domain structure and switching behavior of anisotropic gels,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 51(6), 5824–5831 (1995).
[Crossref] [PubMed]

1991 (1)

R. A. M. Hikmet, “Anisotropic gels and plasticized networks formed by liquid crystal molecules,” Liq. Cryst 9(3), 405–416 (1991).
[Crossref]

1990 (1)

D. J. Broer, R. G. Gossink, and R. A. M. Hikmet, “Die Angewandte,” Makromol. Chem. 183(1), 45–66 (1990).
[Crossref]

Bastiaansen, C. W. M.

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

H. J. B. Jagt, H. J. Cornelissen, D. J. Broer, and C. W. M. Bastiaansen, “Micro-structured polymeric linearly, polarized light emitting lightguide for LCD Illumination,” Dig. Tech. Pap. 33(1), 1236 (2002).
[Crossref]

Blom, S. M. P.

S. M. P. Blom, H. P. M. Huck, H. J. Cornelissen, and H. Greiner, “Towards a polarized light-emitting backlight: micro-structured anisotropic layers,” Journal of the SID 10, 209–213 (2002).

Boots, H. M. J.

R. A. M. Hikmet and H. M. J. Boots, “Domain structure and switching behavior of anisotropic gels,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 51(6), 5824–5831 (1995).
[Crossref] [PubMed]

Broer, D. J.

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

H. J. B. Jagt, H. J. Cornelissen, D. J. Broer, and C. W. M. Bastiaansen, “Micro-structured polymeric linearly, polarized light emitting lightguide for LCD Illumination,” Dig. Tech. Pap. 33(1), 1236 (2002).
[Crossref]

D. J. Broer, R. G. Gossink, and R. A. M. Hikmet, “Die Angewandte,” Makromol. Chem. 183(1), 45–66 (1990).
[Crossref]

Cheng, M.-C.

C.-J. Li, Y.-C. Fang, W.-T. Chu, and M.-C. Cheng, “Design of a prism light-guide plate for an LCD backlight module,” Journal of the SID 16, 545–550 (2008).

Chu, W.-T.

C.-J. Li, Y.-C. Fang, W.-T. Chu, and M.-C. Cheng, “Design of a prism light-guide plate for an LCD backlight module,” Journal of the SID 16, 545–550 (2008).

Cornelissen, H. J.

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

H. J. B. Jagt, H. J. Cornelissen, D. J. Broer, and C. W. M. Bastiaansen, “Micro-structured polymeric linearly, polarized light emitting lightguide for LCD Illumination,” Dig. Tech. Pap. 33(1), 1236 (2002).
[Crossref]

S. M. P. Blom, H. P. M. Huck, H. J. Cornelissen, and H. Greiner, “Towards a polarized light-emitting backlight: micro-structured anisotropic layers,” Journal of the SID 10, 209–213 (2002).

Cui, Y.

D.-K. Yang, Y. Cui, H. Nemati, X.-C. Zhou, and A. Moheghi, “Modeling aligning effect of polymer network in polymer stabilized nematic liquid crystals,” J. Appl. Phys. 114(24), 243515 (2013).
[Crossref]

Erdhuisen, E.

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

Fang, Y.-C.

C.-J. Li, Y.-C. Fang, W.-T. Chu, and M.-C. Cheng, “Design of a prism light-guide plate for an LCD backlight module,” Journal of the SID 16, 545–550 (2008).

Gossink, R. G.

D. J. Broer, R. G. Gossink, and R. A. M. Hikmet, “Die Angewandte,” Makromol. Chem. 183(1), 45–66 (1990).
[Crossref]

Greiner, H.

S. M. P. Blom, H. P. M. Huck, H. J. Cornelissen, and H. Greiner, “Towards a polarized light-emitting backlight: micro-structured anisotropic layers,” Journal of the SID 10, 209–213 (2002).

Hikmet, R. A. M.

R. A. M. Hikmet and H. M. J. Boots, “Domain structure and switching behavior of anisotropic gels,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 51(6), 5824–5831 (1995).
[Crossref] [PubMed]

R. A. M. Hikmet, “Anisotropic gels and plasticized networks formed by liquid crystal molecules,” Liq. Cryst 9(3), 405–416 (1991).
[Crossref]

D. J. Broer, R. G. Gossink, and R. A. M. Hikmet, “Die Angewandte,” Makromol. Chem. 183(1), 45–66 (1990).
[Crossref]

Huck, H. P. M.

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

S. M. P. Blom, H. P. M. Huck, H. J. Cornelissen, and H. Greiner, “Towards a polarized light-emitting backlight: micro-structured anisotropic layers,” Journal of the SID 10, 209–213 (2002).

Jagt, H. J. B.

H. J. B. Jagt, H. J. Cornelissen, D. J. Broer, and C. W. M. Bastiaansen, “Micro-structured polymeric linearly, polarized light emitting lightguide for LCD Illumination,” Dig. Tech. Pap. 33(1), 1236 (2002).
[Crossref]

Käläntär, K.

K. Käläntär, S. Matsumoto, T. Onishi, and K. Takizawa, “Optical micro deflector based functional light-guide plate for backlight unit,” SID Tech. Digest 31(1), 1029–1031 (2000).
[Crossref]

Kimmel, J.

J. Kimmel, “Diffractive backlight technologies for mobile applications,” J. Soc. Inf. Disp. 20(5), 245 (2012).
[Crossref]

Li, C.-J.

C.-J. Li, Y.-C. Fang, W.-T. Chu, and M.-C. Cheng, “Design of a prism light-guide plate for an LCD backlight module,” Journal of the SID 16, 545–550 (2008).

Luo, Z.

Z. Luo and S. T. Wu, “Polarization-preserving light guide plate for a linearly polarized backlight,” J. Display Tech. 10(3), 208–214 (2014).
[Crossref]

Ma, R. Q.

R. Q. Ma and D.-K. Yang, “Freedericksz transition in polymer-stabilized nematic liquid crystals,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 61(2), 1567–1573 (2000).
[Crossref] [PubMed]

Maaskant, N.

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

Matsumoto, S.

K. Käläntär, S. Matsumoto, T. Onishi, and K. Takizawa, “Optical micro deflector based functional light-guide plate for backlight unit,” SID Tech. Digest 31(1), 1029–1031 (2000).
[Crossref]

Moheghi, A.

D.-K. Yang, Y. Cui, H. Nemati, X.-C. Zhou, and A. Moheghi, “Modeling aligning effect of polymer network in polymer stabilized nematic liquid crystals,” J. Appl. Phys. 114(24), 243515 (2013).
[Crossref]

Nemati, H.

D.-K. Yang, Y. Cui, H. Nemati, X.-C. Zhou, and A. Moheghi, “Modeling aligning effect of polymer network in polymer stabilized nematic liquid crystals,” J. Appl. Phys. 114(24), 243515 (2013).
[Crossref]

Onishi, T.

K. Käläntär, S. Matsumoto, T. Onishi, and K. Takizawa, “Optical micro deflector based functional light-guide plate for backlight unit,” SID Tech. Digest 31(1), 1029–1031 (2000).
[Crossref]

Picken, S. J.

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

Takizawa, K.

K. Käläntär, S. Matsumoto, T. Onishi, and K. Takizawa, “Optical micro deflector based functional light-guide plate for backlight unit,” SID Tech. Digest 31(1), 1029–1031 (2000).
[Crossref]

Tech, S. I. D.

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

Wu, S. T.

Z. Luo and S. T. Wu, “Polarization-preserving light guide plate for a linearly polarized backlight,” J. Display Tech. 10(3), 208–214 (2014).
[Crossref]

Yang, D.-K.

D.-K. Yang, Y. Cui, H. Nemati, X.-C. Zhou, and A. Moheghi, “Modeling aligning effect of polymer network in polymer stabilized nematic liquid crystals,” J. Appl. Phys. 114(24), 243515 (2013).
[Crossref]

R. Q. Ma and D.-K. Yang, “Freedericksz transition in polymer-stabilized nematic liquid crystals,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 61(2), 1567–1573 (2000).
[Crossref] [PubMed]

Zhou, X.-C.

D.-K. Yang, Y. Cui, H. Nemati, X.-C. Zhou, and A. Moheghi, “Modeling aligning effect of polymer network in polymer stabilized nematic liquid crystals,” J. Appl. Phys. 114(24), 243515 (2013).
[Crossref]

Dig. Tech. Pap. (1)

H. J. B. Jagt, H. J. Cornelissen, D. J. Broer, and C. W. M. Bastiaansen, “Micro-structured polymeric linearly, polarized light emitting lightguide for LCD Illumination,” Dig. Tech. Pap. 33(1), 1236 (2002).
[Crossref]

Digest (1)

H. J. Cornelissen, H. P. M. Huck, D. J. Broer, S. J. Picken, C. W. M. Bastiaansen, E. Erdhuisen, N. Maaskant, and S. I. D. Tech, “Polarized light LCD backlight based on liquid crystalline polymer film: a new manufacturing process,” Digest 35, 1178 (2004).

J. Appl. Phys. (1)

D.-K. Yang, Y. Cui, H. Nemati, X.-C. Zhou, and A. Moheghi, “Modeling aligning effect of polymer network in polymer stabilized nematic liquid crystals,” J. Appl. Phys. 114(24), 243515 (2013).
[Crossref]

J. Display Tech. (1)

Z. Luo and S. T. Wu, “Polarization-preserving light guide plate for a linearly polarized backlight,” J. Display Tech. 10(3), 208–214 (2014).
[Crossref]

J. Soc. Inf. Disp. (1)

J. Kimmel, “Diffractive backlight technologies for mobile applications,” J. Soc. Inf. Disp. 20(5), 245 (2012).
[Crossref]

Journal of the SID (2)

S. M. P. Blom, H. P. M. Huck, H. J. Cornelissen, and H. Greiner, “Towards a polarized light-emitting backlight: micro-structured anisotropic layers,” Journal of the SID 10, 209–213 (2002).

C.-J. Li, Y.-C. Fang, W.-T. Chu, and M.-C. Cheng, “Design of a prism light-guide plate for an LCD backlight module,” Journal of the SID 16, 545–550 (2008).

Liq. Cryst (1)

R. A. M. Hikmet, “Anisotropic gels and plasticized networks formed by liquid crystal molecules,” Liq. Cryst 9(3), 405–416 (1991).
[Crossref]

Makromol. Chem. (1)

D. J. Broer, R. G. Gossink, and R. A. M. Hikmet, “Die Angewandte,” Makromol. Chem. 183(1), 45–66 (1990).
[Crossref]

Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics (2)

R. A. M. Hikmet and H. M. J. Boots, “Domain structure and switching behavior of anisotropic gels,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 51(6), 5824–5831 (1995).
[Crossref] [PubMed]

R. Q. Ma and D.-K. Yang, “Freedericksz transition in polymer-stabilized nematic liquid crystals,” Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics 61(2), 1567–1573 (2000).
[Crossref] [PubMed]

SID Tech. Digest (1)

K. Käläntär, S. Matsumoto, T. Onishi, and K. Takizawa, “Optical micro deflector based functional light-guide plate for backlight unit,” SID Tech. Digest 31(1), 1029–1031 (2000).
[Crossref]

Other (7)

E. Lueder, Liquid Crystal Displays, 2nd edition (John Wiley and Sons, Ltd., 2010).

D.-K. Yang and S.-T. Wu, Fundamentals of Liquid Crystal Devices, 2nd edition (Malaysia, 2015).

S. Kobayashi, S. Mikoshiba, and S. Lim, LCD Backlights (John Wiley and Sons, 2009).

R. A. M. Hikmet, Liquid Crystals in Complex Geometries, G. P. Crawford and S. Zumer, eds. (Taylor & Francis, 1996) Chapter 3, pp. 53–82.

D. J. Broer, Liquid Crystals in Complex Geometries, G. P. Crawford and S. Zumer, eds. (Taylor & Francis, 1996), Chapter 4, 239–255.

D.-K. Yang, L.-C. Chien, and Y. K. Fung, Liquid Crystals in Complex Geometries, G.P. Crawford and S. Zumer, eds. (Taylor & Francis, 1996), Chapter 5, pp. 103–143.

D.-K. Yang, “Polymer stabilized liquid crystal displays,” Progress in Liquid Crystal Science and Technology, H-S. Kwok, S. Naemura and H. L. Ong, eds. (World Scientific, 2012).

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Figures (4)

Fig. 1
Fig. 1 Schematic diagram of the active polarizing light waveguide plate. (a) voltage off state, (b) voltage on state.
Fig. 2
Fig. 2 Transmission vs. polarizer angle of the active polarizing LWGP. (a) V = 0 V, (b) = 20 V
Fig. 3
Fig. 3 Scattered light intensity as a function of the polarizer angle defined with respect to the alignment layer rubbing direction. (a) edgelight installed on the edge perpendicular to the rubbing direction. (b) edgelight installed on the edge parallel to the rubbing direction.
Fig. 4
Fig. 4 Scattered light intensity as a function of the distance from the edgelight. (a) edgelight installed on the edge perpendicular to the rubbing, (b) edgelight installed on the edge parallel to the rubbing. //: polarizer parallel to the rubbing, : polarizer perpendicular to the rubbing.

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