Abstract

An optically partitioned backlight system consisting of tandem wedge-shaped light-guides (LGs) with micro-line-prism arrays was developed for scanning field-sequential-color (FSC) liquid crystal display (LCD) in large size. The unit of wedge-shaped LG combined with a light-emitting diode (LED) light-bar was designed and fabricated to collimate the extraction light within a narrow angular extent. Based on the edge lighting approach, the volume of backlight system can be reduced down to 25 mm without sacrifice of the optical behavior. As a result, 2750 nits average luminance subject to 50% duty cycle and 83% uniformity can be achieved. The leakages into the consecutive adjacent blocks were well suppressed to 11.86%.

© 2008 IEEE

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  1. T. Uchida, "A liquid crystal multicolor display using color filters," Proc Eurodisplay (1981) pp. 39-42.
  2. T. Uchida, "Multicolored liquid crystal displays," Opt. Eng 23, 247-252 (1984).
  3. T. Uchida, S. Yamamoto, Y. Shibata, "A full-color matrix liquid-crystal display with color layers on the electrodes," IDRC Conf. Rec. (1982) pp. 166-170.
  4. K. Sekiya, K. Wako, S. Nakano, T. Ishinabe, T. Miyashita, T. Uchida, "Overdrive for compensating color-shift on field sequential color TFT-LCDs," SID Symp. Dig. Tech. Papers (2004) pp. 408-411.
  5. T. Uchida, K. Saitoh, T. Miyashita, M. Suzuki, "Field sequential full color LCD without color filter for AM-LCD," IDRC Conf. Rec. (1997) pp. 37-40.
  6. F. Yamada, H. Nakamura, Y. Sakaguchi, and Y. Taira, Y. Taira, "Color sequential LCD based on OCB with an LED backlight," SID Symp. Dig. Tech. Papers (2000) pp. 1180-1183.
  7. N. Koma, T. Miyashita, T. Uchida, N. Mitani, "Color field sequential LCD using an OCB-TFT-LCD," SID Symp. Dig. Tech. Papers (2000) pp. 632-635.
  8. J. Yoo, "Side light type field sequential color LCD using divided light guide plates," IDRC Conf. Rec. (2003) pp. 180-183.
  9. W. C. Tai, S. J. Chiou, C. N. Mo, C. L. Liu, "Field sequential color LCD-TV using multi-area control algorithm," Proc IDMC (2007) pp. 439-442.
  10. K. Käläntär, T. Kishimoto, K. Sekiya, T. Miyashita, T. Uchida, "Spatial-temporal scanning backlight for color-field sequential optically compensated bend liquid-crystal display," SID Symp. Dig.Tech. Papers (2005) pp. 1316-1319.
  11. K. Sekiya, T. Kishimoto, K. Wako, S. Nakano, H. Ishigami, K. Kaelaentaer, K. Shimabukuro, D. Kunioka, T. Miyashita, T. Uchida, "Spatial-temporal scanning LED backlight for large size field sequential color LCD," Proc Asia Display/IDW '05 (2005) pp. 1261-1264.
  12. K. Käläntär, T. Kishimoto, K. Sekiya, T. Miyashita, T. Uchida, "Spatial-temporal scanning backlight mode for field-sequential-color optically-compensated-bend liquid-crystal display," J. Soc. Inf. Display (SID) 14/2, 151-159 (2006).
  13. M. C. Chien, C. H. Tien, C. C. Chen, Y. H. Lu, "Reion-partitioned LED backlight design for field sequential color LCD," SID Symp. Dig. Tech. Papers (2007) pp. 441-444.
  14. C. C. Chen, Y. F. Chen, T. T. Liu, C. H. Chen, M. T. Ho, K. H. Chen, H. P. Shieh, "Spatial-temporal division in field sequential color techinuqe for color filterless LCD," SID Symp. Dig. Tech. Papers (2007) pp. 1806-1809.
  15. Everlight Electronic Co., Ltd. “High power LED,” (2007) http://www.everlight.com.
  16. Y. K. Cheng, S. H. Chung, J. L. Chern, "Analysis and reduction of dark zone in ultra-thin wedge-plate displays," J. Soc. Inf. Display (SID) 14/9, 813-818 (2006).
  17. CONOSCOPE, ErgoScope“Autronic-Melchers GmbH: Visual performance measurement solutions,” (2007) http://www.autronic-melchers.com/index.php?product=29.
  18. T. Uchida, S. Yamamoto, Y. Shibata, "A full-color matrix liquid-crystal display with color layers on the electrodes," IEEE Trans. Electron Devices ED-30, 503-507 (1983).

2006 (2)

K. Käläntär, T. Kishimoto, K. Sekiya, T. Miyashita, T. Uchida, "Spatial-temporal scanning backlight mode for field-sequential-color optically-compensated-bend liquid-crystal display," J. Soc. Inf. Display (SID) 14/2, 151-159 (2006).

Y. K. Cheng, S. H. Chung, J. L. Chern, "Analysis and reduction of dark zone in ultra-thin wedge-plate displays," J. Soc. Inf. Display (SID) 14/9, 813-818 (2006).

1984 (1)

T. Uchida, "Multicolored liquid crystal displays," Opt. Eng 23, 247-252 (1984).

1983 (1)

T. Uchida, S. Yamamoto, Y. Shibata, "A full-color matrix liquid-crystal display with color layers on the electrodes," IEEE Trans. Electron Devices ED-30, 503-507 (1983).

IEEE Trans. Electron Devices (1)

T. Uchida, S. Yamamoto, Y. Shibata, "A full-color matrix liquid-crystal display with color layers on the electrodes," IEEE Trans. Electron Devices ED-30, 503-507 (1983).

J. Soc. Inf. Display (SID) (1)

Y. K. Cheng, S. H. Chung, J. L. Chern, "Analysis and reduction of dark zone in ultra-thin wedge-plate displays," J. Soc. Inf. Display (SID) 14/9, 813-818 (2006).

J. Soc. Inf. Display (SID) (1)

K. Käläntär, T. Kishimoto, K. Sekiya, T. Miyashita, T. Uchida, "Spatial-temporal scanning backlight mode for field-sequential-color optically-compensated-bend liquid-crystal display," J. Soc. Inf. Display (SID) 14/2, 151-159 (2006).

Opt. Eng (1)

T. Uchida, "Multicolored liquid crystal displays," Opt. Eng 23, 247-252 (1984).

Other (14)

T. Uchida, S. Yamamoto, Y. Shibata, "A full-color matrix liquid-crystal display with color layers on the electrodes," IDRC Conf. Rec. (1982) pp. 166-170.

K. Sekiya, K. Wako, S. Nakano, T. Ishinabe, T. Miyashita, T. Uchida, "Overdrive for compensating color-shift on field sequential color TFT-LCDs," SID Symp. Dig. Tech. Papers (2004) pp. 408-411.

T. Uchida, K. Saitoh, T. Miyashita, M. Suzuki, "Field sequential full color LCD without color filter for AM-LCD," IDRC Conf. Rec. (1997) pp. 37-40.

F. Yamada, H. Nakamura, Y. Sakaguchi, and Y. Taira, Y. Taira, "Color sequential LCD based on OCB with an LED backlight," SID Symp. Dig. Tech. Papers (2000) pp. 1180-1183.

N. Koma, T. Miyashita, T. Uchida, N. Mitani, "Color field sequential LCD using an OCB-TFT-LCD," SID Symp. Dig. Tech. Papers (2000) pp. 632-635.

J. Yoo, "Side light type field sequential color LCD using divided light guide plates," IDRC Conf. Rec. (2003) pp. 180-183.

W. C. Tai, S. J. Chiou, C. N. Mo, C. L. Liu, "Field sequential color LCD-TV using multi-area control algorithm," Proc IDMC (2007) pp. 439-442.

K. Käläntär, T. Kishimoto, K. Sekiya, T. Miyashita, T. Uchida, "Spatial-temporal scanning backlight for color-field sequential optically compensated bend liquid-crystal display," SID Symp. Dig.Tech. Papers (2005) pp. 1316-1319.

K. Sekiya, T. Kishimoto, K. Wako, S. Nakano, H. Ishigami, K. Kaelaentaer, K. Shimabukuro, D. Kunioka, T. Miyashita, T. Uchida, "Spatial-temporal scanning LED backlight for large size field sequential color LCD," Proc Asia Display/IDW '05 (2005) pp. 1261-1264.

M. C. Chien, C. H. Tien, C. C. Chen, Y. H. Lu, "Reion-partitioned LED backlight design for field sequential color LCD," SID Symp. Dig. Tech. Papers (2007) pp. 441-444.

C. C. Chen, Y. F. Chen, T. T. Liu, C. H. Chen, M. T. Ho, K. H. Chen, H. P. Shieh, "Spatial-temporal division in field sequential color techinuqe for color filterless LCD," SID Symp. Dig. Tech. Papers (2007) pp. 1806-1809.

Everlight Electronic Co., Ltd. “High power LED,” (2007) http://www.everlight.com.

CONOSCOPE, ErgoScope“Autronic-Melchers GmbH: Visual performance measurement solutions,” (2007) http://www.autronic-melchers.com/index.php?product=29.

T. Uchida, "A liquid crystal multicolor display using color filters," Proc Eurodisplay (1981) pp. 39-42.

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