Pixel-isolation liquid crystals formed by polarization-selective UV-curing of a prepolymer containing cinnamate oligomer

doi:10.1364/OE.18.011737

Pixel-isolation liquid crystals formed by polarization-selective UV-curing of a prepolymer containing cinnamate oligomer

Shi-Joon Sung, Eun Ae Jung, Dae-Hwan Kim, Dae-Ho Son, Jin-Kyu Kang, and Kuk Young Cho »View Author Affiliations

Optics Express, Vol. 18, Issue 11, pp. 11737-11745 (2010)
http://dx.doi.org/10.1364/OE.18.011737

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Abstract
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Abstract

A pixel isolated liquid crystal display was fabricated by polarization-selective anisotropic photoreaction of a prepolymer containing a cinnamate oligomer. The cinnamate oligomer was mainly distributed on the surface region of a UV-cured polymer wall. Anisotropic photo-dimerization of cinnamate moiety was achieved by polarized UV exposure. It was found that the polymer walls containing cinnamate dimers formed by polarized UV exposure showed ordered orientation of LC molecules at the boundary of the polymer walls resulting in electro-optic performance improvement.

OCIS Codes
(160.3710) Materials : Liquid crystals
(230.3720) Optical devices : Liquid-crystal devices
(240.6670) Optics at surfaces : Surface photochemistry

ToC Category:
Optical Devices

History
Original Manuscript: January 20, 2010
Revised Manuscript: May 3, 2010
Manuscript Accepted: May 13, 2010
Published: May 19, 2010

Citation
Shi-Joon Sung, Eun Ae Jung, Dae-Hwan Kim, Dae-Ho Son, Jin-Kyu Kang, and Kuk Young Cho, "Pixel-isolation liquid crystals formed by polarization-selective UV-curing of a prepolymer containing cinnamate oligomer," Opt. Express 18, 11737-11745 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-11-11737

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References

J. Jang, “Displays develop a new flexibility,” Mater. Today 9(4), 46–52 (2006). [CrossRef]
G. P. Crawford, “Encapsulated liquid crystal materials for flexible display applications,” in Flexible Flat Panel Displays (Wiley, New York, 2005), pp. 313–330.
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V. Vorflusev and S. Kumar, “Phase-separated composite films for liquid crystal displays,” Science 283(5409), 1903–1905 (1999). [CrossRef] [PubMed]
Y. Kim, J. Francl, B. Taheri, and J. L. West, “A method for the formation of polymer walls in liquid crystal/polymer mixtures,” Appl. Phys. Lett. 72(18), 2253–2255 (1998). [CrossRef]
J. W. Jung, S. K. Park, S. B. Kwon, and J. H. Kim, “Pixel-Isolated Liquid Crystal Mode for Flexible Display Applications,” Jpn. J. Appl. Phys. 43(No. 7A), 4269–4272 (2004). [CrossRef]
T. Murashige, H. Fujikake, H. Sato, H. Kikuchi, T. Kurita, and F. Sato, “Polymer Wall Formation Using Liquid-Crystal/Polymer Phase Separation Induced on Patterned Polyimide Films,” Jpn. J. Appl. Phys. 43(No. 12B), L1578–L1580 (2004). [CrossRef]
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K. Ichimura, “Photoalignment of Liquid-Crystal Systems,” Chem. Rev. 100(5), 1847–1874 (2000). [CrossRef]
X. T. Li, D. H. Pei, S. Kobayashi, and Y. Iimura, “Measurement of Azimuthal Anchoring Energy at Liquid Crystal/Photopolymer Interface,” Jpn. J. Appl. Phys. 36(Part 2, No. 4A), L432–L434 (1997). [CrossRef]
S. R. Lee, J. H. Shin, J. I. Baek, M. C. Oh, T. H. Yoon, and J. C. Kim, “Initially π−twisted nematic liquid crystal cell stabilized by a fluorinated polymer wall,” Appl. Phys. Lett. 90(16), 163513 (2007). [CrossRef]
F. Roussel and B. M. Fung, “Anchoring behavior, orientational order, and reorientation dynamics of nematic liquid crystal droplets dispersed in cross-linked polymer networks,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 67(4), 041709 (2003). [CrossRef] [PubMed]

Baek, J. I.
Campi, J.
Francl, J.
Fujikake, H.
Fung, B. M.
Greening, B. K.
Gundlach, D. J.
Hammond, M. S.
Hill, I. G.
Huang, J. R.
Ichimura, K.
Iimura, Y.
Jackson, T. N.
Jang, J.
Jung, J. W.
Kane, M. G.
Kikuchi, H.
Kim, J. C.
Kim, J. H.
Kim, Y.
Kobayashi, S.
Kumar, S.
Kurita, T.
Kwon, S. B.
Lee, S. R.
Li, X. T.
Murashige, T.
Oh, M. C.
Park, S. K.
Pei, D. H.
Roussel, F.
Sato, F.
Sato, H.
Sheraw, C. D.
Shin, J. H.
Taheri, B.
Vorflusev, V.
West, J.
West, J. L.
Yoon, T. H.
Zhou, L.

Appl. Phys. Lett.

C. D. Sheraw, L. Zhou, J. R. Huang, D. J. Gundlach, T. N. Jackson, M. G. Kane, I. G. Hill, M. S. Hammond, J. Campi, B. K. Greening, J. Francl, and J. West, “Organic thin-film transistor-driven polymer-dispersed liquid crystal displays on flexible polymeric substrates,” Appl. Phys. Lett. 80(6), 1088–1090 (2002). [CrossRef]
Y. Kim, J. Francl, B. Taheri, and J. L. West, “A method for the formation of polymer walls in liquid crystal/polymer mixtures,” Appl. Phys. Lett. 72(18), 2253–2255 (1998). [CrossRef]
J. I. Baek, J. H. Shin, M. C. Oh, J. C. Kim, and T. H. Yoon, “Pixel-isolation walls of liquid crystal display formed by fluorinated UV-curable polymers,” Appl. Phys. Lett. 88(16), 161104 (2006). [CrossRef]
S. R. Lee, J. H. Shin, J. I. Baek, M. C. Oh, T. H. Yoon, and J. C. Kim, “Initially π−twisted nematic liquid crystal cell stabilized by a fluorinated polymer wall,” Appl. Phys. Lett. 90(16), 163513 (2007). [CrossRef]

Chem. Rev.

K. Ichimura, “Photoalignment of Liquid-Crystal Systems,” Chem. Rev. 100(5), 1847–1874 (2000). [CrossRef]

Jpn. J. Appl. Phys.

X. T. Li, D. H. Pei, S. Kobayashi, and Y. Iimura, “Measurement of Azimuthal Anchoring Energy at Liquid Crystal/Photopolymer Interface,” Jpn. J. Appl. Phys. 36(Part 2, No. 4A), L432–L434 (1997). [CrossRef]
J. W. Jung, S. K. Park, S. B. Kwon, and J. H. Kim, “Pixel-Isolated Liquid Crystal Mode for Flexible Display Applications,” Jpn. J. Appl. Phys. 43(No. 7A), 4269–4272 (2004). [CrossRef]
T. Murashige, H. Fujikake, H. Sato, H. Kikuchi, T. Kurita, and F. Sato, “Polymer Wall Formation Using Liquid-Crystal/Polymer Phase Separation Induced on Patterned Polyimide Films,” Jpn. J. Appl. Phys. 43(No. 12B), L1578–L1580 (2004). [CrossRef]

Mater. Today

J. Jang, “Displays develop a new flexibility,” Mater. Today 9(4), 46–52 (2006). [CrossRef]

Phys. Rev. E Stat. Nonlin. Soft Matter Phys.

F. Roussel and B. M. Fung, “Anchoring behavior, orientational order, and reorientation dynamics of nematic liquid crystal droplets dispersed in cross-linked polymer networks,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 67(4), 041709 (2003). [CrossRef] [PubMed]

Science

V. Vorflusev and S. Kumar, “Phase-separated composite films for liquid crystal displays,” Science 283(5409), 1903–1905 (1999). [CrossRef] [PubMed]

Other

G. P. Crawford, “Encapsulated liquid crystal materials for flexible display applications,” in Flexible Flat Panel Displays (Wiley, New York, 2005), pp. 313–330.

2007, Lee, Appl. Phys. Lett.
2006, Jang, Mater. Today
2006, Baek, Appl. Phys. Lett.
2004, Jung, Jpn. J. Appl. Phys.
2004, Murashige, Jpn. J. Appl. Phys.
2003, Roussel, Phys. Rev. E Stat. Nonlin. Soft Matter Phys.
2002, Sheraw, Appl. Phys. Lett.
2000, Ichimura, Chem. Rev.
1999, Vorflusev, Science
1998, Kim, Appl. Phys. Lett.
1997, Li, Jpn. J. Appl. Phys.

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