Abstract

A full-color image on field sequential color (FSC) displays is composed of color fields in temporal sequence. With the FSC mechanism, color filters of liquid crystal displays (LCDs) can be removed to heighten the light efficiency and lower the material cost. Color breakup (CBU), however, has appeared intrinsically to degrade visual qualities. A novel gray level determination of liquid crystal and backlight (LC/BL) was proposed to suppress the CBU artifact on FSC-LCDs. Based on the image content in each frame, a dominated color-mixed field was found to minimize the color difference between the CBU and original image. Additionally, the feedback algorithm for the adaptive LC/BL signals was developed and implemented on a 32-inch optically compensated bend (OCB) mode LC panel. According to the evaluation of experiments and observations, the proposed method has been demonstrated to greatly suppress CBU in LCD applications.

© 2008 IEEE

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References

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  1. P. J. Bos, "The pi-cell: A fast liquid-crystal optical-switching device," Molecular Crystals and Liq. Crystals 113, 329-339 (1984).
  2. Y. Yamaguchi, "Wide-viewing-angle display mode for the active-matrix LCD using bend-alignment liquid-crystal cell," SID Symp. Dig. Tech. Papers (1993) pp. 277-280.
  3. F. Yamada, "Color sequential LCD based on OCB with an LED backlight," SID Symp. Dig. Tech. Papers (2000) pp. 1180-1183.
  4. T. Fukami, "New driving method for field sequential color LCDs using OCB mode," IDW'06 (2006) pp. 1617-1620.
  5. O. Wasa, "Analysis of color breakup in field sequential color projection system for large area display," IDW'99 (1999) pp. 993-996O. Wasa, "Analysis of color breakup in field sequential color projection system for large area display," IDW'99 993-996 (1999).
  6. T. Kurita, "Evaluation and improvement of picture quality for moving images on field sequential color displays," IDW'00 (2000) pp. 69-72.
  7. J. Lee, "Noble measurement method for color breakup artifact in FPDs," IMID/IDMC'06 (2006) pp. 92-97.
  8. Y. T. Hsu, "Drive and control circuitry of OCB field-sequential color LCD with high data rate," IDMC'07 (2007) pp. 435-438.
  9. S. P. Yan, "A visual model of color break-up for design field-sequential LCDs," SID Symp. Dig. Tech. Papers (2007) pp. 338-341.
  10. S. C. Chen, "A human visual model for color break-up artifact in design field sequential color LCDs," IDMC'07 (2007) pp. 872-875.
  11. Y. F. Chen, "Mixed color sequential technique for high contrast LCD with optimum power consumption," SID Symp. Dig. Tech. Papers (2007) pp. 134-137.
  12. C. C. Chen, "Spatial-temporal division in field sequential color technique for color filterless LCD," SID Symp. Dig. Tech. Papers (2007) pp. 1806-1809.
  13. J. B. Eichenlaub, "Develop and preliminary evaluation of field sequential LCD free of color breakup," SID Symp. Dig. Tech. Papers (1994) pp. 293-296.
  14. K. Sekiya, "A simple and practical way to cope with color breakup on field sequential color LCDs," SID Symp. Dig. Tech. Papers (2006) pp. 1661-1664.
  15. M. Mori, "Mechanism of color breakup on field sequential color projectors," SID Symp. Dig. Tech. Papers (1999) pp. 350-353.

1999 (1)

O. Wasa, "Analysis of color breakup in field sequential color projection system for large area display," IDW'99 (1999) pp. 993-996O. Wasa, "Analysis of color breakup in field sequential color projection system for large area display," IDW'99 993-996 (1999).

1984 (1)

P. J. Bos, "The pi-cell: A fast liquid-crystal optical-switching device," Molecular Crystals and Liq. Crystals 113, 329-339 (1984).

IDW'99 (1)

O. Wasa, "Analysis of color breakup in field sequential color projection system for large area display," IDW'99 (1999) pp. 993-996O. Wasa, "Analysis of color breakup in field sequential color projection system for large area display," IDW'99 993-996 (1999).

Molecular Crystals and Liq. Crystals (1)

P. J. Bos, "The pi-cell: A fast liquid-crystal optical-switching device," Molecular Crystals and Liq. Crystals 113, 329-339 (1984).

Other (13)

Y. Yamaguchi, "Wide-viewing-angle display mode for the active-matrix LCD using bend-alignment liquid-crystal cell," SID Symp. Dig. Tech. Papers (1993) pp. 277-280.

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

T. Fukami, "New driving method for field sequential color LCDs using OCB mode," IDW'06 (2006) pp. 1617-1620.

T. Kurita, "Evaluation and improvement of picture quality for moving images on field sequential color displays," IDW'00 (2000) pp. 69-72.

J. Lee, "Noble measurement method for color breakup artifact in FPDs," IMID/IDMC'06 (2006) pp. 92-97.

Y. T. Hsu, "Drive and control circuitry of OCB field-sequential color LCD with high data rate," IDMC'07 (2007) pp. 435-438.

S. P. Yan, "A visual model of color break-up for design field-sequential LCDs," SID Symp. Dig. Tech. Papers (2007) pp. 338-341.

S. C. Chen, "A human visual model for color break-up artifact in design field sequential color LCDs," IDMC'07 (2007) pp. 872-875.

Y. F. Chen, "Mixed color sequential technique for high contrast LCD with optimum power consumption," SID Symp. Dig. Tech. Papers (2007) pp. 134-137.

C. C. Chen, "Spatial-temporal division in field sequential color technique for color filterless LCD," SID Symp. Dig. Tech. Papers (2007) pp. 1806-1809.

J. B. Eichenlaub, "Develop and preliminary evaluation of field sequential LCD free of color breakup," SID Symp. Dig. Tech. Papers (1994) pp. 293-296.

K. Sekiya, "A simple and practical way to cope with color breakup on field sequential color LCDs," SID Symp. Dig. Tech. Papers (2006) pp. 1661-1664.

M. Mori, "Mechanism of color breakup on field sequential color projectors," SID Symp. Dig. Tech. Papers (1999) pp. 350-353.

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