Abstract

Hand-held liquid crystal displays are usually edgelit, where light is produced by a light source installed at the edge of the display and is spread out to illuminate the entire display through a light waveguide plate (LWGP). We developed a stable polarizing light waveguide plate which converts unpolarized incident light from edgelight into linearly polarized light. It selectively scatters light depending on the polarization. Its structure is stabilized by polymer network. Its scattering property is permanent without applied voltage. This polarizing LWGP can significantly increase the light efficiency of edgelit liquid crystal displays.

© 2016 Optical Society of America

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References

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  1. E. Lueder, Liquid Crystal Displays (John Wiley and Sons, Ltd, 2010).
  2. D.-K. Yang and S.-T. Wu, Fundamentals of Liquid Crystal Devices (John Wiley and Sons, Ltd, 2015).
  3. J.-H. Lee, D. N. Liu, and S.-T. Wu, Introduction to Flat Panel Displays (John Wiley and Sons, Ltd, 2008).
  4. A. Bhowmik, Z. Li, and P. J. Bos, Mobile Displays (John Wiley & Sons, Ltd, 2008).
  5. S. Kobayashi, S. Mikoshiba, and S. Lim, LCD Backlights (John Wiley and Sons, 2009).
  6. 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]
  7. 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,” SID Dig. Tech. 33(1), 1236–1239 (2002).
    [Crossref]
  8. Z. Luo and S. T. Wu, “Polarization-preserving light guide plate for a linearly polarized backlight,” J. Dis. Tech. 10(3), 208–214 (2014).
    [Crossref]
  9. J. Kimmel, “Diffractive backlight technologies for mobile applications,” J. Soc. Inf. Disp. 20(5), 245–258 (2012).
    [Crossref]
  10. A. Moheghi, H. Nemati, and D.-K. Yang, “Polarizing light waveguide plate from polymer stabilized liquid crystals,” Opt. Mater. Express 5(5), 1217–1223 (2015).
    [Crossref]
  11. G. P. Crawford and S. Zumer, Liquid Crystals in Complex Geometries (Taylor & Francis, London, 53–82, 1996). chap. 3.
  12. G. P. Crawford and S. Zumer, Liquid Crystals in Complex Geometries (Taylor & Francis, London, 1996). Chap. 4.
  13. 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]
  14. H.-S. Kwok, S. Naemura, and H. L. Ong, Progress in Liquid Crystal Science and Technology (World Scientific, 2012).chap.25.
  15. 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]

2015 (1)

2014 (1)

Z. Luo and S. T. Wu, “Polarization-preserving light guide plate for a linearly polarized backlight,” J. Dis. 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), 245–258 (2012).
[Crossref]

2002 (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,” SID Dig. Tech. 33(1), 1236–1239 (2002).
[Crossref]

2000 (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]

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]

Bastiaansen, C. W. M.

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,” SID Dig. Tech. 33(1), 1236–1239 (2002).
[Crossref]

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. B. Jagt, H. J. Cornelissen, D. J. Broer, and C. W. M. Bastiaansen, “Micro-structured polymeric linearly, polarized light emitting lightguide for LCD Illumination,” SID Dig. Tech. 33(1), 1236–1239 (2002).
[Crossref]

Cornelissen, H. J.

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,” SID Dig. Tech. 33(1), 1236–1239 (2002).
[Crossref]

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]

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]

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,” SID Dig. Tech. 33(1), 1236–1239 (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), 245–258 (2012).
[Crossref]

Luo, Z.

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

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.

A. Moheghi, H. Nemati, and D.-K. Yang, “Polarizing light waveguide plate from polymer stabilized liquid crystals,” Opt. Mater. Express 5(5), 1217–1223 (2015).
[Crossref]

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.

A. Moheghi, H. Nemati, and D.-K. Yang, “Polarizing light waveguide plate from polymer stabilized liquid crystals,” Opt. Mater. Express 5(5), 1217–1223 (2015).
[Crossref]

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]

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]

Wu, S. T.

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

Yang, D.-K.

A. Moheghi, H. Nemati, and D.-K. Yang, “Polarizing light waveguide plate from polymer stabilized liquid crystals,” Opt. Mater. Express 5(5), 1217–1223 (2015).
[Crossref]

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]

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]

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. Dis. Tech. (1)

Z. Luo and S. T. Wu, “Polarization-preserving light guide plate for a linearly polarized backlight,” J. Dis. 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), 245–258 (2012).
[Crossref]

Opt. Mater. Express (1)

Phys. Rev. E Stat. Phys. Plasmas Fluids Relat. Interdiscip. Topics (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]

SID Dig. Tech. (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,” SID Dig. Tech. 33(1), 1236–1239 (2002).
[Crossref]

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 (8)

H.-S. Kwok, S. Naemura, and H. L. Ong, Progress in Liquid Crystal Science and Technology (World Scientific, 2012).chap.25.

G. P. Crawford and S. Zumer, Liquid Crystals in Complex Geometries (Taylor & Francis, London, 53–82, 1996). chap. 3.

G. P. Crawford and S. Zumer, Liquid Crystals in Complex Geometries (Taylor & Francis, London, 1996). Chap. 4.

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

D.-K. Yang and S.-T. Wu, Fundamentals of Liquid Crystal Devices (John Wiley and Sons, Ltd, 2015).

J.-H. Lee, D. N. Liu, and S.-T. Wu, Introduction to Flat Panel Displays (John Wiley and Sons, Ltd, 2008).

A. Bhowmik, Z. Li, and P. J. Bos, Mobile Displays (John Wiley & Sons, Ltd, 2008).

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

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Figures (5)

Fig. 1
Fig. 1 Schematic diagrams showing stable polarizing light waveguide plate was made. (a) homogeneous state before polymerization, (b) first step of polymerization without applied voltage, (c) second step of polymerization with applied voltage, (d) multi-domain state after polymerization.
Fig. 2
Fig. 2 Transmission vs. polarizer angle of the polarizing LWGP for normal incident light.
Fig. 3
Fig. 3 Scattered light intensity as a function of the polarizer angle of the polarizing LWGP when edgelit.
Fig. 4
Fig. 4 Scattered light intensity as a function of the distance from the edgelight. //: polarizer parallel to rubbing, : polarizer perpendicular to rubbing.
Fig. 5
Fig. 5 Photographs of the passive LWGP. (a) edgelight off and polarizer perpendicular to the rubbing. (b) edgelight off and polarizer parallel to the rubbing. (c) edgelight on and polarizer perpendicular to the rubbing. (d) edgelight on and polarizer parallel to the rubbing.

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