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Journal of Display Technology

Journal of Display Technology


  • Vol. 6, Iss. 3 — Mar. 1, 2010
  • pp: 107–112

Color Breakup Reduction by 180 Hz Stencil-FSC Method in Large-Sized Color Filter-Less LCDs

Fang-Cheng Lin, Yi-Pai Huang, and Han-Ping David Shieh

Journal of Display Technology, Vol. 6, Issue 3, pp. 107-112 (2010)

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Field-sequential color (FSC) is a high optical throughput technique for future green liquid crystal displays (LCDs). However, the FSC-LCD faces a lethal issue, color breakup (CBU) which degrades image clarity and prevents high level LCD-TV productions. We proposed the “180 Hz Stencil Field-Sequential-Color” method to redistribute intensities of the three primary color field-images to suppress CBU. By applying local color-backlight-dimming technology to FSC-LCDs, a low resolution colorful backlight panel combined with a high resolution color filter-less LC panel generated a “green-based multi-color” field-image which showed the most image luminance in the first field. Therefore, residual red and blue field-image intensities were reduced and effectively suppressed CBU when compared to field-rate increasing methods. In addition, to further implement hardware, the number of backlight divisions of 32$\times$24 and a proper Gaussian point spread function profile were optimized via simulations while considering CBU reduction and image fidelity. Using optimized hardware parameters, the CBU phenomenon was suppressed by 50% of traditional RGB driving in simulation and was demonstrated on a 120 Hz 46-inch MVA LCD-TV.

© 2010 IEEE

Fang-Cheng Lin, Yi-Pai Huang, and Han-Ping David Shieh, "Color Breakup Reduction by 180 Hz Stencil-FSC Method in Large-Sized Color Filter-Less LCDs," J. Display Technol. 6, 107-112 (2010)

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