Abstract

We propose a new electrode structure for the fringe-field switching mode, which not only has a smaller color shift but also transmits more light than the chevron-type structure. While the chevron-type electrode structure mainly uses the different directions of the electric field, the proposed structure makes use of position-dependent strengths as well as different directions of the electric field. Position-dependent electric field strengths bring about rotation of LCs different from position to position in a pixel, which further reduce the color shift by using the multi-domain effect.

© 2007 Optical Society of America

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References

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  1. S. H. Lee, S. L. Lee, and H. Y. Kim, "Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching," App. Phys. Lett. 73, 2881-2883 (1998).
    [CrossRef]
  2. M. Oh-e and K. Kondo, "Electro-optical characteristics and switching behaviour of the in-plane switching mode," Appl. Phys. Lett. 67, 3895-3897 (1995).
    [CrossRef]
  3. R. A. Soref, "Field effects in nematic liquid crystals obtained with interdigital electrodes," J. Appl. Phys. 45, 5466-5468 (1974).
    [CrossRef]
  4. S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
    [CrossRef]
  5. H. H. H. Klausmann, S. Aratani, and K. Kondo, "Optical characterization of the in-plane switching effect utilizing multidomain structures," J. Appl. Phys. 83, 1854-1862 (1998).
    [CrossRef]
  6. H. Y. Kim, G. R. Jeon, D.-S. Seo, M.-H. Lee, and S. S. Lee, "Dual domain effects on a homogeneously aligned nematic liquid crystal cell driven by a fringe-field," Jpn. J. Appl. Phys. 41, 2944-2948 (2002).
    [CrossRef]
  7. P. G. de Gennes and J. Prost, "Static distortions in a nematic single crystal: Electric field effects in an insulating nematic," in The Physics of Liquid Crystals (Clarendon, Oxford, 1993), pp. 133-135.
  8. R. Lu, Q. Hong, Z. Ge, and S.-T. Wu, "Color shift reduction of a multi-domain IPS-LCD using RGB-LED backlight," Opt. Express 14, 6243-6252 (2006).
    [CrossRef] [PubMed]

2006 (1)

2002 (1)

H. Y. Kim, G. R. Jeon, D.-S. Seo, M.-H. Lee, and S. S. Lee, "Dual domain effects on a homogeneously aligned nematic liquid crystal cell driven by a fringe-field," Jpn. J. Appl. Phys. 41, 2944-2948 (2002).
[CrossRef]

1998 (2)

S. H. Lee, S. L. Lee, and H. Y. Kim, "Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching," App. Phys. Lett. 73, 2881-2883 (1998).
[CrossRef]

H. H. H. Klausmann, S. Aratani, and K. Kondo, "Optical characterization of the in-plane switching effect utilizing multidomain structures," J. Appl. Phys. 83, 1854-1862 (1998).
[CrossRef]

1997 (1)

S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
[CrossRef]

1995 (1)

M. Oh-e and K. Kondo, "Electro-optical characteristics and switching behaviour of the in-plane switching mode," Appl. Phys. Lett. 67, 3895-3897 (1995).
[CrossRef]

1974 (1)

R. A. Soref, "Field effects in nematic liquid crystals obtained with interdigital electrodes," J. Appl. Phys. 45, 5466-5468 (1974).
[CrossRef]

Aratani, S.

H. H. H. Klausmann, S. Aratani, and K. Kondo, "Optical characterization of the in-plane switching effect utilizing multidomain structures," J. Appl. Phys. 83, 1854-1862 (1998).
[CrossRef]

S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
[CrossRef]

Ashizawa, K.

S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
[CrossRef]

Ge, Z.

Hong, Q.

Jeon, G. R.

H. Y. Kim, G. R. Jeon, D.-S. Seo, M.-H. Lee, and S. S. Lee, "Dual domain effects on a homogeneously aligned nematic liquid crystal cell driven by a fringe-field," Jpn. J. Appl. Phys. 41, 2944-2948 (2002).
[CrossRef]

Kim, H. Y.

H. Y. Kim, G. R. Jeon, D.-S. Seo, M.-H. Lee, and S. S. Lee, "Dual domain effects on a homogeneously aligned nematic liquid crystal cell driven by a fringe-field," Jpn. J. Appl. Phys. 41, 2944-2948 (2002).
[CrossRef]

S. H. Lee, S. L. Lee, and H. Y. Kim, "Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching," App. Phys. Lett. 73, 2881-2883 (1998).
[CrossRef]

Klausmann, H.

S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
[CrossRef]

Klausmann, H. H. H.

H. H. H. Klausmann, S. Aratani, and K. Kondo, "Optical characterization of the in-plane switching effect utilizing multidomain structures," J. Appl. Phys. 83, 1854-1862 (1998).
[CrossRef]

Kondo, K.

H. H. H. Klausmann, S. Aratani, and K. Kondo, "Optical characterization of the in-plane switching effect utilizing multidomain structures," J. Appl. Phys. 83, 1854-1862 (1998).
[CrossRef]

S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
[CrossRef]

M. Oh-e and K. Kondo, "Electro-optical characteristics and switching behaviour of the in-plane switching mode," Appl. Phys. Lett. 67, 3895-3897 (1995).
[CrossRef]

Lee, M.-H.

H. Y. Kim, G. R. Jeon, D.-S. Seo, M.-H. Lee, and S. S. Lee, "Dual domain effects on a homogeneously aligned nematic liquid crystal cell driven by a fringe-field," Jpn. J. Appl. Phys. 41, 2944-2948 (2002).
[CrossRef]

Lee, S. H.

S. H. Lee, S. L. Lee, and H. Y. Kim, "Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching," App. Phys. Lett. 73, 2881-2883 (1998).
[CrossRef]

Lee, S. L.

S. H. Lee, S. L. Lee, and H. Y. Kim, "Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching," App. Phys. Lett. 73, 2881-2883 (1998).
[CrossRef]

Lee, S. S.

H. Y. Kim, G. R. Jeon, D.-S. Seo, M.-H. Lee, and S. S. Lee, "Dual domain effects on a homogeneously aligned nematic liquid crystal cell driven by a fringe-field," Jpn. J. Appl. Phys. 41, 2944-2948 (2002).
[CrossRef]

Lu, R.

Oh-e, M.

S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
[CrossRef]

M. Oh-e and K. Kondo, "Electro-optical characteristics and switching behaviour of the in-plane switching mode," Appl. Phys. Lett. 67, 3895-3897 (1995).
[CrossRef]

Ohta, M.

S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
[CrossRef]

Seo, D.-S.

H. Y. Kim, G. R. Jeon, D.-S. Seo, M.-H. Lee, and S. S. Lee, "Dual domain effects on a homogeneously aligned nematic liquid crystal cell driven by a fringe-field," Jpn. J. Appl. Phys. 41, 2944-2948 (2002).
[CrossRef]

Soref, R. A.

R. A. Soref, "Field effects in nematic liquid crystals obtained with interdigital electrodes," J. Appl. Phys. 45, 5466-5468 (1974).
[CrossRef]

Wu, S.-T.

Yanagawa, K.

S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
[CrossRef]

App. Phys. Lett. (1)

S. H. Lee, S. L. Lee, and H. Y. Kim, "Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching," App. Phys. Lett. 73, 2881-2883 (1998).
[CrossRef]

Appl. Phys. Lett. (1)

M. Oh-e and K. Kondo, "Electro-optical characteristics and switching behaviour of the in-plane switching mode," Appl. Phys. Lett. 67, 3895-3897 (1995).
[CrossRef]

J. Appl. Phys. (2)

R. A. Soref, "Field effects in nematic liquid crystals obtained with interdigital electrodes," J. Appl. Phys. 45, 5466-5468 (1974).
[CrossRef]

H. H. H. Klausmann, S. Aratani, and K. Kondo, "Optical characterization of the in-plane switching effect utilizing multidomain structures," J. Appl. Phys. 83, 1854-1862 (1998).
[CrossRef]

Jpn. J. Appl. Phys. (2)

H. Y. Kim, G. R. Jeon, D.-S. Seo, M.-H. Lee, and S. S. Lee, "Dual domain effects on a homogeneously aligned nematic liquid crystal cell driven by a fringe-field," Jpn. J. Appl. Phys. 41, 2944-2948 (2002).
[CrossRef]

S. Aratani, H. Klausmann, M. Oh-e, M. Ohta, K. Ashizawa, K. Yanagawa, and K. Kondo, "Complete suppression of color shift in in-plane switching mode liquid crystal displays with a multidomain structure obtained by unidirectional rubbing," Jpn. J. Appl. Phys. 36, L27-L29 (1997).
[CrossRef]

Opt. Express (1)

Other (1)

P. G. de Gennes and J. Prost, "Static distortions in a nematic single crystal: Electric field effects in an insulating nematic," in The Physics of Liquid Crystals (Clarendon, Oxford, 1993), pp. 133-135.

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Figures (12)

Fig. 1.
Fig. 1.

Color shift at the on state.

Fig. 2.
Fig. 2.

Color shift compensation in the chevron-type electrode structure.

Fig. 3.
Fig. 3.

Diaper-type electrode structure and the motion of LCs with the applied electric field.

Fig. 4.
Fig. 4.

Twist angle distribution of LCs at the same distance from an electrode.

Fig. 5.
Fig. 5.

Principle of color shift compensation in the diaper-type electrode structure.

Fig. 6.
Fig. 6.

Dependence of color shift on viewing directions.

Fig. 7.
Fig. 7.

Intensities of lateral electric fields.

Fig. 8.
Fig. 8.

Twist deformation of LCs at the bright state.

Fig. 9.
Fig. 9.

Light transmission at the bright state for the two structures.

Fig. 10.
Fig. 10.

Voltage-dependent light transmission of the FFS mode.

Fig. 11.
Fig. 11.

Iso-contrast contours of Chevron-type and diaper-type FFS modes.

Fig. 12.
Fig. 12.

Structural dependence of the color shift and transmission characteristics

Equations (3)

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T / T 0 = sin 2 ( 2 Ψ ) sin 2 ( π d Δ n ( θ , φ ) λ ) ,
M = D × E = ε 0 Δ ε ( n ̂ E ) n ̂ × E = 1 2 ε 0 Δ ε E 0 2 sin 2 φ ,
Δ u Δ v = ( Δ u ) 2 + ( Δ v ) 2 ,

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