Color breakup reduction by 180 Hz stencil-FSC method in large-sized color filter-Less LCDs

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

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.

Original languageEnglish
Article number5419283
Pages (from-to)107-112
Number of pages6
JournalIEEE/OSA Journal of Display Technology
Volume6
Issue number3
DOIs
StatePublished - 1 Mar 2010

Keywords

  • Color breakup (CBU)
  • Color filter-less
  • Field-sequential-color (FSC)
  • High-dynamic-range
  • Stencil-FSC

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