Abstract

We propose a light shutter device using dichroic-dye-doped liquid crystals (LCs) whose Bragg reflection wavelength is set to be infrared by controlling the pitch of cholesteric liquid crystals (ChLCs). A dye-doped long-pitch ChLC cell is switchable between the dark planar state and the transparent homeotropic state. It has the advantages of high transmittance, low operation voltage, and an easy fabrication process relative to previous LC light shutter devices. The proposed light shutter device is expected to achieve high visibility for transparent organic light-emitting diode displays and emerging smart windows, which can be used in airplanes, cars, and other similar applications.

© 2013 Optical Society of America

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    [CrossRef]
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    [CrossRef]
  3. J. W. Doane, N. A. Vaz, B. G. Wu, and S. Žumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett.48(4), 269–271 (1986).
    [CrossRef]
  4. R. A. M. Hikmet, “Electrically induced light scattering from anisotropic gels,” J. Appl. Phys.68(9), 4406–4412 (1990).
    [CrossRef]
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    [CrossRef]
  6. C. P. Chen, K.-H. Kim, T.-H. Yoon, and J. C. Kim, “A viewing angle switching panel using guest–host liquid crystal,” Jpn. J. Appl. Phys.48(6), 062401 (2009).
    [CrossRef]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]

2011 (4)

2010 (2)

2009 (2)

2008 (1)

1996 (1)

G. Gu, V. Bulović, P. E. Burrows, S. R. Forrest, and M. E. Thompson, “Transparent organic light emitting devices,” Appl. Phys. Lett.68(19), 2606–2608 (1996).
[CrossRef]

1994 (1)

D.-K. Yang, J. L. West, L.-C. Chien, and J. W. Doane, “Control of reflectivity and bistability in displays using cholesteric liquid crystals,” J. Appl. Phys.76(2), 1331–1333 (1994).
[CrossRef]

1990 (1)

R. A. M. Hikmet, “Electrically induced light scattering from anisotropic gels,” J. Appl. Phys.68(9), 4406–4412 (1990).
[CrossRef]

1987 (1)

C. W. Tang and S. A. VanSlyke, “Organic electroluminescent diodes,” Appl. Phys. Lett.51(12), 913–915 (1987).
[CrossRef]

1986 (1)

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Žumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett.48(4), 269–271 (1986).
[CrossRef]

Bulovic, V.

G. Gu, V. Bulović, P. E. Burrows, S. R. Forrest, and M. E. Thompson, “Transparent organic light emitting devices,” Appl. Phys. Lett.68(19), 2606–2608 (1996).
[CrossRef]

Burrows, P. E.

G. Gu, V. Bulović, P. E. Burrows, S. R. Forrest, and M. E. Thompson, “Transparent organic light emitting devices,” Appl. Phys. Lett.68(19), 2606–2608 (1996).
[CrossRef]

Chen, C. P.

C. P. Chen, K.-H. Kim, T.-H. Yoon, and J. C. Kim, “A viewing angle switching panel using guest–host liquid crystal,” Jpn. J. Appl. Phys.48(6), 062401 (2009).
[CrossRef]

Chen, C.-C.

Chen, H.-S.

Cheng, K.-T.

Cheong, B.-H.

Chiang, T.-H.

Chien, L.-C.

D.-K. Yang, J. L. West, L.-C. Chien, and J. W. Doane, “Control of reflectivity and bistability in displays using cholesteric liquid crystals,” J. Appl. Phys.76(2), 1331–1333 (1994).
[CrossRef]

Choi, H.-Y.

Doane, J. W.

D.-K. Yang, J. L. West, L.-C. Chien, and J. W. Doane, “Control of reflectivity and bistability in displays using cholesteric liquid crystals,” J. Appl. Phys.76(2), 1331–1333 (1994).
[CrossRef]

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Žumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett.48(4), 269–271 (1986).
[CrossRef]

Forrest, S. R.

G. Gu, V. Bulović, P. E. Burrows, S. R. Forrest, and M. E. Thompson, “Transparent organic light emitting devices,” Appl. Phys. Lett.68(19), 2606–2608 (1996).
[CrossRef]

Fuh, A. Y.-G.

Gu, G.

G. Gu, V. Bulović, P. E. Burrows, S. R. Forrest, and M. E. Thompson, “Transparent organic light emitting devices,” Appl. Phys. Lett.68(19), 2606–2608 (1996).
[CrossRef]

Hikmet, R. A. M.

R. A. M. Hikmet, “Electrically induced light scattering from anisotropic gels,” J. Appl. Phys.68(9), 4406–4412 (1990).
[CrossRef]

Hsu, H.-K.

Hwang, K. Y.

Jang, J. E.

Jeng, S.-C.

Jin, H.

H.-J. Jin, K.-H. Kim, H. Jin, J. C. Kim, and T.-H. Yoon, “Dye-doped liquid crystal device switchable between reflective and transmissive modes,” J. Inf. Disp.12(1), 17–21 (2011).
[CrossRef]

Jin, H.-J.

Jin, Y. W.

Jung, J. E.

Kim, J. C.

H.-J. Jin, K.-H. Kim, H. Jin, J. C. Kim, and T.-H. Yoon, “Dye-doped liquid crystal device switchable between reflective and transmissive modes,” J. Inf. Disp.12(1), 17–21 (2011).
[CrossRef]

K.-H. Kim, H.-J. Jin, D. H. Song, B.-H. Cheong, H.-Y. Choi, S. T. Shin, J. C. Kim, and T.-H. Yoon, “Switching of liquid-crystal devices between reflective and transmissive modes using long-pitch cholesteric liquid crystals,” Opt. Lett.35(20), 3504–3506 (2010).
[CrossRef] [PubMed]

K.-H. Kim, H.-J. Jin, K.-H. Park, J.-H. Lee, J. C. Kim, and T.-H. Yoon, “Long-pitch cholesteric liquid crystal cell for switchable achromatic reflection,” Opt. Express18(16), 16745–16750 (2010).
[CrossRef] [PubMed]

C. P. Chen, K.-H. Kim, T.-H. Yoon, and J. C. Kim, “A viewing angle switching panel using guest–host liquid crystal,” Jpn. J. Appl. Phys.48(6), 062401 (2009).
[CrossRef]

Kim, K.-H.

H.-J. Jin, K.-H. Kim, H. Jin, J. C. Kim, and T.-H. Yoon, “Dye-doped liquid crystal device switchable between reflective and transmissive modes,” J. Inf. Disp.12(1), 17–21 (2011).
[CrossRef]

K.-H. Kim, H.-J. Jin, D. H. Song, B.-H. Cheong, H.-Y. Choi, S. T. Shin, J. C. Kim, and T.-H. Yoon, “Switching of liquid-crystal devices between reflective and transmissive modes using long-pitch cholesteric liquid crystals,” Opt. Lett.35(20), 3504–3506 (2010).
[CrossRef] [PubMed]

K.-H. Kim, H.-J. Jin, K.-H. Park, J.-H. Lee, J. C. Kim, and T.-H. Yoon, “Long-pitch cholesteric liquid crystal cell for switchable achromatic reflection,” Opt. Express18(16), 16745–16750 (2010).
[CrossRef] [PubMed]

C. P. Chen, K.-H. Kim, T.-H. Yoon, and J. C. Kim, “A viewing angle switching panel using guest–host liquid crystal,” Jpn. J. Appl. Phys.48(6), 062401 (2009).
[CrossRef]

Lee, G. H.

Lee, J.-H.

Lee, S. Y.

Liao, C.-C.

Lin, T.-H.

Lin, Y.-H.

Lin, Y.-R.

Liu, C.-K.

Park, K.-H.

Shin, S. T.

Song, D. H.

Tang, C. W.

C. W. Tang and S. A. VanSlyke, “Organic electroluminescent diodes,” Appl. Phys. Lett.51(12), 913–915 (1987).
[CrossRef]

Thompson, M. E.

G. Gu, V. Bulović, P. E. Burrows, S. R. Forrest, and M. E. Thompson, “Transparent organic light emitting devices,” Appl. Phys. Lett.68(19), 2606–2608 (1996).
[CrossRef]

VanSlyke, S. A.

C. W. Tang and S. A. VanSlyke, “Organic electroluminescent diodes,” Appl. Phys. Lett.51(12), 913–915 (1987).
[CrossRef]

Vaz, N. A.

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Žumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett.48(4), 269–271 (1986).
[CrossRef]

Wang, C.-T.

West, J. L.

D.-K. Yang, J. L. West, L.-C. Chien, and J. W. Doane, “Control of reflectivity and bistability in displays using cholesteric liquid crystals,” J. Appl. Phys.76(2), 1331–1333 (1994).
[CrossRef]

Wu, B. G.

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Žumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett.48(4), 269–271 (1986).
[CrossRef]

Wu, C.-H.

Yang, D.-K.

D.-K. Yang, J. L. West, L.-C. Chien, and J. W. Doane, “Control of reflectivity and bistability in displays using cholesteric liquid crystals,” J. Appl. Phys.76(2), 1331–1333 (1994).
[CrossRef]

Yang, J.-M.

Yoon, T.-H.

H.-J. Jin, K.-H. Kim, H. Jin, J. C. Kim, and T.-H. Yoon, “Dye-doped liquid crystal device switchable between reflective and transmissive modes,” J. Inf. Disp.12(1), 17–21 (2011).
[CrossRef]

K.-H. Kim, H.-J. Jin, D. H. Song, B.-H. Cheong, H.-Y. Choi, S. T. Shin, J. C. Kim, and T.-H. Yoon, “Switching of liquid-crystal devices between reflective and transmissive modes using long-pitch cholesteric liquid crystals,” Opt. Lett.35(20), 3504–3506 (2010).
[CrossRef] [PubMed]

K.-H. Kim, H.-J. Jin, K.-H. Park, J.-H. Lee, J. C. Kim, and T.-H. Yoon, “Long-pitch cholesteric liquid crystal cell for switchable achromatic reflection,” Opt. Express18(16), 16745–16750 (2010).
[CrossRef] [PubMed]

C. P. Chen, K.-H. Kim, T.-H. Yoon, and J. C. Kim, “A viewing angle switching panel using guest–host liquid crystal,” Jpn. J. Appl. Phys.48(6), 062401 (2009).
[CrossRef]

┼Żumer, S.

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Žumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett.48(4), 269–271 (1986).
[CrossRef]

Appl. Phys. Lett. (3)

C. W. Tang and S. A. VanSlyke, “Organic electroluminescent diodes,” Appl. Phys. Lett.51(12), 913–915 (1987).
[CrossRef]

G. Gu, V. Bulović, P. E. Burrows, S. R. Forrest, and M. E. Thompson, “Transparent organic light emitting devices,” Appl. Phys. Lett.68(19), 2606–2608 (1996).
[CrossRef]

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Žumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett.48(4), 269–271 (1986).
[CrossRef]

J. Appl. Phys. (2)

R. A. M. Hikmet, “Electrically induced light scattering from anisotropic gels,” J. Appl. Phys.68(9), 4406–4412 (1990).
[CrossRef]

D.-K. Yang, J. L. West, L.-C. Chien, and J. W. Doane, “Control of reflectivity and bistability in displays using cholesteric liquid crystals,” J. Appl. Phys.76(2), 1331–1333 (1994).
[CrossRef]

J. Inf. Disp. (1)

H.-J. Jin, K.-H. Kim, H. Jin, J. C. Kim, and T.-H. Yoon, “Dye-doped liquid crystal device switchable between reflective and transmissive modes,” J. Inf. Disp.12(1), 17–21 (2011).
[CrossRef]

Jpn. J. Appl. Phys. (1)

C. P. Chen, K.-H. Kim, T.-H. Yoon, and J. C. Kim, “A viewing angle switching panel using guest–host liquid crystal,” Jpn. J. Appl. Phys.48(6), 062401 (2009).
[CrossRef]

Opt. Express (4)

Opt. Lett. (2)

Opt. Mater. Express (1)

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Figures (6)

Fig. 1
Fig. 1

Configuration of a dye-doped long-pitch ChLC cell, of which the textures are in (a) the planar (dark) and (b) the homeotropic (transparent) state.

Fig. 2
Fig. 2

The measured transmission spectra of dye-doped long-pitch ChLC cells.

Fig. 3
Fig. 3

The measured transmittance versus the number of pitches of dye-doped long-pitch ChLC cells.

Fig. 4
Fig. 4

The measured and calculated transmittances in the planar state vs. the number of pitches.

Fig. 5
Fig. 5

The transmittance of a dye-doped long-pitch ChLC cell measured by using a linearly polarized light source.

Fig. 6
Fig. 6

Photographs of a dye-doped long-pitch ChLC cell, of which the textures are in (a) the planar (dark) and (b) the homeotropic (transparent) state.

Tables (1)

Tables Icon

Table 1 The measured electro-optic characteristics of dye-doped LC cells.

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