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$\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
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