15.1: Invited Paper: A 46-inch TFT-LCD HDTV Technology with Color Management and Image Quality Enhancement

• Published in: SID International Symposium Digest of technical papers 2004-05, Vol.35 (1), p.750-753
• Main Authors: Liu, C. T., Lin, Yu Chieh, Chen, P. L., Hong, Hong Jye, Kuo, Tai-Yu, Lin, Tung-Tsun, Chiang, M. F., Wu, Yang-En, Tseng, Andrew, Wu, Allen C. K., Hsu, Jerry, Chou, Kelvin, Lee, Kuochih, Lyu, Li-Ru, Wu, Kuan Yi, Li, Huan Hsin, Chu, Ta Hsin, Hsieh, Brian, Li, Shengzen, Wey, Chinder, Wu, Yung-Zhi, Chen, Ya-Fang, Kuo, Po Yu, Yu, H. L., Cheng, Faery, Cheng, K. C., Yang, Jimmy C. K., Lin, Ting Li, Yang, C. C., Chang, WenShou, Lee, Richard C. Y., Fu, Samuel, Weng, Vincent, Chen, Hui Chang, Liao, Shih Hong, Liao, Y. J., Wang, Arex
• Format: Article
• Language: English
• ISSN: 0097-966X; 2168-0159
• DOI: 10.1889/1.1821390

We have developed a 46‐inch TFT‐LCD HDTV (high definition television — 1080p) with digital color management and image enhancement technologies. The panel uses premium MVA (multi‐domain vertical alignment liquid crystals, and is fabricated on generation‐5 glass substrates with ODF process (one drop filled liquid crystal process). It adopts the true wide format of 16:9. The viewing angle at a CR (contrast ratio) of 10:1 is greater than 170° in all directions. In the normal direction, CR is above 800. For conventional color management and image quality enhancement, we optimized the color performance between color‐filters and backlight units as well as the properties of VA LC and polarizers. The outcomes include high color gamut (75% of NTSC) and brightness (> 600 nits). More advanced digital color management techniques include the application of vivid color mapping, and gamma correction by signal processing. For the quality of fast moving pictures, we have developed a new driving approach in conjunction with advanced VA LC's to achieve a response speed of 8 ms in average. The new approach compensates the slow transition between gray levels.