Title: Color Breakup Reduction by 180 Hz Stencil-FSC Method in Large-Sized Color Filter-Less LCDs
Authors: Lin, Fang-Cheng
Huang, Yi-Pai
Shieh, Han-Ping David
Department of Photonics
Institute of Display
Keywords: Color breakup (CBU);color filter-less;field-sequential-color (FSC);high-dynamic-range;stencil-FSC
Issue Date: 1-Mar-2010
Abstract: 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 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.
URI: http://dx.doi.org/10.1109/JDT.2009.2027034
ISSN: 1551-319X
DOI: 10.1109/JDT.2009.2027034
Volume: 6
Issue: 3
Begin Page: 107
End Page: 112
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