Abstract

A viewing angle switching (VAS) panel used for the conversion of wide and narrow viewing angle has been demonstrated. Unlike the previous VAS panels, this one features a pair of same-handed circular polarizers and it is capable of switching the viewing angle omni-directionally from wide to narrow or vice versa by electrically controlling the birefringence effect of the LC layer which is sandwiched in between. To explain how it works, the design principle as well as the optimization of both wide and narrow viewing modes will be elaborated hereinafter.

© 2007 Optical Society of America

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  1. T. Ishinabe, T. Miyashita and T. Uchida, "Improvement of viewing angle properties of IPS-mode LCD by using super-wide-viewing-angle polarizer," Mol. Cryst. Liq. Cryst. 410, 381-390 (2004).
    [CrossRef]
  2. C.-H. Lin, "Extraordinarily wide-view and high-transmittance vertically aligned liquid crystal displays," Appl. Phys. Lett. 90,151112 (2007).
    [CrossRef]
  3. M. C. Tsai, C. M. Chang, P. L. Chen, and K. Y. Lin, "Viewing-angle switchable LCD," Int. Display Manufacturing Conf., 805-806 (2005).
  4. S.-H. Oh and M.-H. Lee, "Liquid crystal display device having variable viewing angle," US patent 7068336 (2006).
  5. E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
    [CrossRef]
  6. J.-I. Baek, Y.-H. Kwon, J.C. Kim and T.-H. Yoon, "Dual-mode switching of a liquid crystal panel for viewing angle control," Appl. Phys. Lett. 90,101104 (2007).
    [CrossRef]
  7. C. P. Chen, C. G. Jhun, T.-H. Yoon and J. C. Kim, "Viewing angle switching of tristate liquid crystal display," Jpn. J. Appl. Phys. 46, L676-L678 (2007).
    [CrossRef]
  8. W. Sautter, T. Kallfass, G. Bader and E. Lueder, "A backlight system providing variable viewing angles for transmissive LCDs," Soc. Inf. Disp. Tech. Digest 29, 235-238 (1998).
    [CrossRef]
  9. Y. Hisatake, Y. Kawata and A. Murayama, "Viewing angle controllable LCD using variable optical compensator and variable diffuser," Soc. Inf. Disp. Tech. Digest 36, 1218-1221 (2005).
    [CrossRef]
  10. H.-S. Jang and H.-S. Jin, "LCD device for switching between wide viewing angle display mode and narrow viewing angle display mode and method for fabricating the same," US patent 20070002220 (2007).
  11. H.-S. Jang and H.-S. Jin, "Liquid crystal display device for switching display mode between wide viewing angle and narrow viewing angle and method for fabricating the same," US patent 20070002230 (2007).
  12. K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
    [CrossRef]
  13. M. Adachi, and M. Shimura, "Controllable viewing-angle displays using a hybrid aligned nematic liquid crystal cell," Soc. Inf. Disp. Tech. Digest 37, 705-708 (2006).
    [CrossRef]
  14. K. Hiyama, R. Ogawa, T. Ishinabe and T. Uchida, "Design of high performance viewing-angle-controllable LC panel," Intl. Disp. Workshop, 217-218 (2006).
  15. K.-W. Chien, Y.-J. Hsu and H.-M. Chen, "Dual light source for backlight systems for smart viewing-adjustable LCDs," Soc. Inf. Disp. Tech. Digest 37, 1425-1427 (2006).
    [CrossRef]
  16. Y. Iwamoto and Y. Iimura, "Transmittance enhancement for randomly aligned liquid crystal displays with circular polarizers," Jpn. J. Appl. Phys. 41, L1383-L1385 (2002).
    [CrossRef]
  17. Q. Hong, T. X. Wu, X. Zhu, R. Lu and S.-T. Wu, "Designs of wide-view and broadband circular polarizers," Opt. Express 13, 8318-8331 (2005), http://www.opticsinfobase.org/abstract.cfm?URI=oe-13-20-8318.
    [CrossRef] [PubMed]
  18. H. S. Kwok, "Parameter space representation of liquid crystal display operating modes," J. Appl. Phys. 80, 3687-3693 (1996).
    [CrossRef]
  19. P. Yeh and C. Gu, Optics of liquid crystal displays, (Wiley, New York, 1999), Chap. 3.
  20. A. Uchiyama and T. Yatabe, "Control of wavelength dispersion of birefringence for oriented copolycarbonate films containing positive and negative birefringent units," Jpn. J. Appl. Phys. 42, 6941-6945 (2003).
    [CrossRef]
  21. X. Zhu, Z. Ge and S.-T. Wu, "Analytical solutions for uniaxial-film-compensated wide-view liquid crystal displays," J. Disp. Technol. 2, 2-20 (2006).
    [CrossRef]

2007

C.-H. Lin, "Extraordinarily wide-view and high-transmittance vertically aligned liquid crystal displays," Appl. Phys. Lett. 90,151112 (2007).
[CrossRef]

E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
[CrossRef]

J.-I. Baek, Y.-H. Kwon, J.C. Kim and T.-H. Yoon, "Dual-mode switching of a liquid crystal panel for viewing angle control," Appl. Phys. Lett. 90,101104 (2007).
[CrossRef]

C. P. Chen, C. G. Jhun, T.-H. Yoon and J. C. Kim, "Viewing angle switching of tristate liquid crystal display," Jpn. J. Appl. Phys. 46, L676-L678 (2007).
[CrossRef]

2006

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

M. Adachi, and M. Shimura, "Controllable viewing-angle displays using a hybrid aligned nematic liquid crystal cell," Soc. Inf. Disp. Tech. Digest 37, 705-708 (2006).
[CrossRef]

K.-W. Chien, Y.-J. Hsu and H.-M. Chen, "Dual light source for backlight systems for smart viewing-adjustable LCDs," Soc. Inf. Disp. Tech. Digest 37, 1425-1427 (2006).
[CrossRef]

X. Zhu, Z. Ge and S.-T. Wu, "Analytical solutions for uniaxial-film-compensated wide-view liquid crystal displays," J. Disp. Technol. 2, 2-20 (2006).
[CrossRef]

2005

Q. Hong, T. X. Wu, X. Zhu, R. Lu and S.-T. Wu, "Designs of wide-view and broadband circular polarizers," Opt. Express 13, 8318-8331 (2005), http://www.opticsinfobase.org/abstract.cfm?URI=oe-13-20-8318.
[CrossRef] [PubMed]

Y. Hisatake, Y. Kawata and A. Murayama, "Viewing angle controllable LCD using variable optical compensator and variable diffuser," Soc. Inf. Disp. Tech. Digest 36, 1218-1221 (2005).
[CrossRef]

2004

T. Ishinabe, T. Miyashita and T. Uchida, "Improvement of viewing angle properties of IPS-mode LCD by using super-wide-viewing-angle polarizer," Mol. Cryst. Liq. Cryst. 410, 381-390 (2004).
[CrossRef]

2003

A. Uchiyama and T. Yatabe, "Control of wavelength dispersion of birefringence for oriented copolycarbonate films containing positive and negative birefringent units," Jpn. J. Appl. Phys. 42, 6941-6945 (2003).
[CrossRef]

2002

Y. Iwamoto and Y. Iimura, "Transmittance enhancement for randomly aligned liquid crystal displays with circular polarizers," Jpn. J. Appl. Phys. 41, L1383-L1385 (2002).
[CrossRef]

1998

W. Sautter, T. Kallfass, G. Bader and E. Lueder, "A backlight system providing variable viewing angles for transmissive LCDs," Soc. Inf. Disp. Tech. Digest 29, 235-238 (1998).
[CrossRef]

1996

H. S. Kwok, "Parameter space representation of liquid crystal display operating modes," J. Appl. Phys. 80, 3687-3693 (1996).
[CrossRef]

Adachi, M.

M. Adachi, and M. Shimura, "Controllable viewing-angle displays using a hybrid aligned nematic liquid crystal cell," Soc. Inf. Disp. Tech. Digest 37, 705-708 (2006).
[CrossRef]

Bader, G.

W. Sautter, T. Kallfass, G. Bader and E. Lueder, "A backlight system providing variable viewing angles for transmissive LCDs," Soc. Inf. Disp. Tech. Digest 29, 235-238 (1998).
[CrossRef]

Baek, J.-I.

J.-I. Baek, Y.-H. Kwon, J.C. Kim and T.-H. Yoon, "Dual-mode switching of a liquid crystal panel for viewing angle control," Appl. Phys. Lett. 90,101104 (2007).
[CrossRef]

Chen, C. P.

C. P. Chen, C. G. Jhun, T.-H. Yoon and J. C. Kim, "Viewing angle switching of tristate liquid crystal display," Jpn. J. Appl. Phys. 46, L676-L678 (2007).
[CrossRef]

Chen, H.-M.

K.-W. Chien, Y.-J. Hsu and H.-M. Chen, "Dual light source for backlight systems for smart viewing-adjustable LCDs," Soc. Inf. Disp. Tech. Digest 37, 1425-1427 (2006).
[CrossRef]

Chien, K.-W.

K.-W. Chien, Y.-J. Hsu and H.-M. Chen, "Dual light source for backlight systems for smart viewing-adjustable LCDs," Soc. Inf. Disp. Tech. Digest 37, 1425-1427 (2006).
[CrossRef]

Choi, H. C.

E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
[CrossRef]

Ge, Z.

X. Zhu, Z. Ge and S.-T. Wu, "Analytical solutions for uniaxial-film-compensated wide-view liquid crystal displays," J. Disp. Technol. 2, 2-20 (2006).
[CrossRef]

Hirama, N.

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

Hisatake, Y.

Y. Hisatake, Y. Kawata and A. Murayama, "Viewing angle controllable LCD using variable optical compensator and variable diffuser," Soc. Inf. Disp. Tech. Digest 36, 1218-1221 (2005).
[CrossRef]

Hong, Q.

Hsu, Y.-J.

K.-W. Chien, Y.-J. Hsu and H.-M. Chen, "Dual light source for backlight systems for smart viewing-adjustable LCDs," Soc. Inf. Disp. Tech. Digest 37, 1425-1427 (2006).
[CrossRef]

Iimura, Y.

Y. Iwamoto and Y. Iimura, "Transmittance enhancement for randomly aligned liquid crystal displays with circular polarizers," Jpn. J. Appl. Phys. 41, L1383-L1385 (2002).
[CrossRef]

Ishinabe, T.

T. Ishinabe, T. Miyashita and T. Uchida, "Improvement of viewing angle properties of IPS-mode LCD by using super-wide-viewing-angle polarizer," Mol. Cryst. Liq. Cryst. 410, 381-390 (2004).
[CrossRef]

Iwamoto, Y.

Y. Iwamoto and Y. Iimura, "Transmittance enhancement for randomly aligned liquid crystal displays with circular polarizers," Jpn. J. Appl. Phys. 41, L1383-L1385 (2002).
[CrossRef]

Jeong, E.

E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
[CrossRef]

Jhun, C. G.

C. P. Chen, C. G. Jhun, T.-H. Yoon and J. C. Kim, "Viewing angle switching of tristate liquid crystal display," Jpn. J. Appl. Phys. 46, L676-L678 (2007).
[CrossRef]

Kallfass, T.

W. Sautter, T. Kallfass, G. Bader and E. Lueder, "A backlight system providing variable viewing angles for transmissive LCDs," Soc. Inf. Disp. Tech. Digest 29, 235-238 (1998).
[CrossRef]

Kanetsuna, T.

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

Kawata, Y.

Y. Hisatake, Y. Kawata and A. Murayama, "Viewing angle controllable LCD using variable optical compensator and variable diffuser," Soc. Inf. Disp. Tech. Digest 36, 1218-1221 (2005).
[CrossRef]

Kim, J. C.

C. P. Chen, C. G. Jhun, T.-H. Yoon and J. C. Kim, "Viewing angle switching of tristate liquid crystal display," Jpn. J. Appl. Phys. 46, L676-L678 (2007).
[CrossRef]

Kim, J.C.

J.-I. Baek, Y.-H. Kwon, J.C. Kim and T.-H. Yoon, "Dual-mode switching of a liquid crystal panel for viewing angle control," Appl. Phys. Lett. 90,101104 (2007).
[CrossRef]

Kimura, S.

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

Kobayashi, S.

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

Kurogi, S.

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

Kwok, H. S.

H. S. Kwok, "Parameter space representation of liquid crystal display operating modes," J. Appl. Phys. 80, 3687-3693 (1996).
[CrossRef]

Kwon, Y.-H.

J.-I. Baek, Y.-H. Kwon, J.C. Kim and T.-H. Yoon, "Dual-mode switching of a liquid crystal panel for viewing angle control," Appl. Phys. Lett. 90,101104 (2007).
[CrossRef]

Lee, G.-D.

E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
[CrossRef]

Lee, S. H.

E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
[CrossRef]

Lim, Y. J.

E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
[CrossRef]

Lin, C.-H.

C.-H. Lin, "Extraordinarily wide-view and high-transmittance vertically aligned liquid crystal displays," Appl. Phys. Lett. 90,151112 (2007).
[CrossRef]

Lu, R.

Lueder, E.

W. Sautter, T. Kallfass, G. Bader and E. Lueder, "A backlight system providing variable viewing angles for transmissive LCDs," Soc. Inf. Disp. Tech. Digest 29, 235-238 (1998).
[CrossRef]

Miyashita, T.

T. Ishinabe, T. Miyashita and T. Uchida, "Improvement of viewing angle properties of IPS-mode LCD by using super-wide-viewing-angle polarizer," Mol. Cryst. Liq. Cryst. 410, 381-390 (2004).
[CrossRef]

Murayama, A.

Y. Hisatake, Y. Kawata and A. Murayama, "Viewing angle controllable LCD using variable optical compensator and variable diffuser," Soc. Inf. Disp. Tech. Digest 36, 1218-1221 (2005).
[CrossRef]

Okada, N.

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

Park, K. H.

E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
[CrossRef]

Rhee, J. M.

E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
[CrossRef]

Sautter, W.

W. Sautter, T. Kallfass, G. Bader and E. Lueder, "A backlight system providing variable viewing angles for transmissive LCDs," Soc. Inf. Disp. Tech. Digest 29, 235-238 (1998).
[CrossRef]

Sekiguchi, S.

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

Shimura, M.

M. Adachi, and M. Shimura, "Controllable viewing-angle displays using a hybrid aligned nematic liquid crystal cell," Soc. Inf. Disp. Tech. Digest 37, 705-708 (2006).
[CrossRef]

Takatoh, K.

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

Uchida, T.

T. Ishinabe, T. Miyashita and T. Uchida, "Improvement of viewing angle properties of IPS-mode LCD by using super-wide-viewing-angle polarizer," Mol. Cryst. Liq. Cryst. 410, 381-390 (2004).
[CrossRef]

Uchiyama, A.

A. Uchiyama and T. Yatabe, "Control of wavelength dispersion of birefringence for oriented copolycarbonate films containing positive and negative birefringent units," Jpn. J. Appl. Phys. 42, 6941-6945 (2003).
[CrossRef]

Uemura, K.

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

Wu, S.-T.

Wu, T. X.

Yatabe, T.

A. Uchiyama and T. Yatabe, "Control of wavelength dispersion of birefringence for oriented copolycarbonate films containing positive and negative birefringent units," Jpn. J. Appl. Phys. 42, 6941-6945 (2003).
[CrossRef]

Yoon, T.-H.

J.-I. Baek, Y.-H. Kwon, J.C. Kim and T.-H. Yoon, "Dual-mode switching of a liquid crystal panel for viewing angle control," Appl. Phys. Lett. 90,101104 (2007).
[CrossRef]

C. P. Chen, C. G. Jhun, T.-H. Yoon and J. C. Kim, "Viewing angle switching of tristate liquid crystal display," Jpn. J. Appl. Phys. 46, L676-L678 (2007).
[CrossRef]

Zhu, X.

Appl. Phys. Lett.

E. Jeong, Y. J. Lim, J. M. Rhee, S. H. Lee, G.-D. Lee, K. H. Park, and H. C. Choi, "Viewing angle switching of vertical alignment liquid crystal displays by controlling birefringence of homogenously aligned liquid crystal layer," Appl. Phys. Lett. 90,051116 (2007).
[CrossRef]

J.-I. Baek, Y.-H. Kwon, J.C. Kim and T.-H. Yoon, "Dual-mode switching of a liquid crystal panel for viewing angle control," Appl. Phys. Lett. 90,101104 (2007).
[CrossRef]

C.-H. Lin, "Extraordinarily wide-view and high-transmittance vertically aligned liquid crystal displays," Appl. Phys. Lett. 90,151112 (2007).
[CrossRef]

J. Appl. Phys.

H. S. Kwok, "Parameter space representation of liquid crystal display operating modes," J. Appl. Phys. 80, 3687-3693 (1996).
[CrossRef]

J. Disp. Technol.

X. Zhu, Z. Ge and S.-T. Wu, "Analytical solutions for uniaxial-film-compensated wide-view liquid crystal displays," J. Disp. Technol. 2, 2-20 (2006).
[CrossRef]

Jpn. J. Appl. Phys.

Y. Iwamoto and Y. Iimura, "Transmittance enhancement for randomly aligned liquid crystal displays with circular polarizers," Jpn. J. Appl. Phys. 41, L1383-L1385 (2002).
[CrossRef]

A. Uchiyama and T. Yatabe, "Control of wavelength dispersion of birefringence for oriented copolycarbonate films containing positive and negative birefringent units," Jpn. J. Appl. Phys. 42, 6941-6945 (2003).
[CrossRef]

C. P. Chen, C. G. Jhun, T.-H. Yoon and J. C. Kim, "Viewing angle switching of tristate liquid crystal display," Jpn. J. Appl. Phys. 46, L676-L678 (2007).
[CrossRef]

Mol. Cryst. Liq. Cryst.

T. Ishinabe, T. Miyashita and T. Uchida, "Improvement of viewing angle properties of IPS-mode LCD by using super-wide-viewing-angle polarizer," Mol. Cryst. Liq. Cryst. 410, 381-390 (2004).
[CrossRef]

Opt. Express

Soc. Inf. Disp. Tech. Digest

K.-W. Chien, Y.-J. Hsu and H.-M. Chen, "Dual light source for backlight systems for smart viewing-adjustable LCDs," Soc. Inf. Disp. Tech. Digest 37, 1425-1427 (2006).
[CrossRef]

W. Sautter, T. Kallfass, G. Bader and E. Lueder, "A backlight system providing variable viewing angles for transmissive LCDs," Soc. Inf. Disp. Tech. Digest 29, 235-238 (1998).
[CrossRef]

Y. Hisatake, Y. Kawata and A. Murayama, "Viewing angle controllable LCD using variable optical compensator and variable diffuser," Soc. Inf. Disp. Tech. Digest 36, 1218-1221 (2005).
[CrossRef]

K. Takatoh, S. Kobayashi, S. Kimura, N. Okada, T. Kanetsuna, N. Hirama, S. Kurogi, S. Sekiguchi and K. Uemura, "New peeping prevention technology to control viewing angle properties of TFT-LCDs, " Soc. Inf. Disp. Tech. Digest 37, 1340-1343 (2006).
[CrossRef]

M. Adachi, and M. Shimura, "Controllable viewing-angle displays using a hybrid aligned nematic liquid crystal cell," Soc. Inf. Disp. Tech. Digest 37, 705-708 (2006).
[CrossRef]

Other

K. Hiyama, R. Ogawa, T. Ishinabe and T. Uchida, "Design of high performance viewing-angle-controllable LC panel," Intl. Disp. Workshop, 217-218 (2006).

M. C. Tsai, C. M. Chang, P. L. Chen, and K. Y. Lin, "Viewing-angle switchable LCD," Int. Display Manufacturing Conf., 805-806 (2005).

S.-H. Oh and M.-H. Lee, "Liquid crystal display device having variable viewing angle," US patent 7068336 (2006).

H.-S. Jang and H.-S. Jin, "LCD device for switching between wide viewing angle display mode and narrow viewing angle display mode and method for fabricating the same," US patent 20070002220 (2007).

H.-S. Jang and H.-S. Jin, "Liquid crystal display device for switching display mode between wide viewing angle and narrow viewing angle and method for fabricating the same," US patent 20070002230 (2007).

P. Yeh and C. Gu, Optics of liquid crystal displays, (Wiley, New York, 1999), Chap. 3.

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Figures (11)

Fig. 1.
Fig. 1.

Optical arrangements of (a) parallel polarizers sandwiching an LC layer, and (b) same-handed circular polarizers an LC layer

Fig. 2.
Fig. 2.

Prototype structure of VAS panel

Fig. 3.
Fig. 3.

Parameter space diagram of VAS panel

Fig. 4.
Fig. 4.

Transmittance calculated with respect to the retardation at variations of twist angle of LC layer

Fig. 5.
Fig. 5.

Viewing angles of various combinations of parameters at WV mode

Fig. 6.
Fig. 6.

Change of polarization on Poincare sphere for WV mode

Fig. 7.
Fig. 7.

Influence of azimuthal angle on the transmittance

Fig. 8.
Fig. 8.

Influence of extraordinary refractive index of QWP on the transmittance

Fig. 9.
Fig. 9.

Transmittance calculated by adjusting the azimuthal angle of input LC director and modified ne of QWP

Fig. 10.
Fig. 10.

Viewing angles of various combinations of parameters at NV mode

Fig. 11.
Fig. 11.

Change of polarization on Poincare sphere for NV mode

Equations (11)

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I out = I in ( 1 + sin 2 ( Γ 2 ) ( cos 2 ( 2 ϕ ) 1 ) ) ,
I out = I in cos 2 ( Γ 2 ) .
M LC = ( A i B C i D C i D A + i B ) ,
A = cos ϕ cos β d + ϕ β d sin ϕ sin β d ,
B = k a β cos ϕ sin β d ,
C = sin ϕ cos β d ϕ β d cos ϕ sin β d ,
D = k a β sin ϕ sin β d .
β d = ( k a 2 d 2 + ϕ 2 ) 1 2 ,
k a = π Δ n λ .
T = 1 2 ( 1 i ) · M LC · 1 2 ( 1 i ) 2 ,
Γ = 2 π λ n o d ( 1 sin 2 θ n e 2 1 sin 2 θ n o 2 ) ,

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