Minimization of color shift generated in RGBW quad structure.

Hong Chul Kim; Jae Kyeong Yun; Heume-Il Baek; Ki Duk Kim; Eui Yeol Oh; In Jae Chung

doi:10.1117/12.587451

18 March 2005 Minimization of color shift generated in RGBW quad structure.

Hong Chul Kim, Jae Kyeong Yun, Heume-Il Baek, Ki Duk Kim, Eui Yeol Oh, In Jae Chung

Proceedings Volume 5666, Human Vision and Electronic Imaging X; (2005) https://doi.org/10.1117/12.587451
Event: Electronic Imaging 2005, 2005, San Jose, California, United States

Abstract

The purpose of RGBW Quad Structure Technology is to realize higher brightness than that of normal panel (RGB stripe structure) by adding white sub-pixel to existing RGB stripe structure. However, there is side effect called 'color shift' resulted from increasing brightness. This side effect degrades general color characteristics due to change of 'Hue', 'Brightness' and 'Saturation' as compared with existing RGB stripe structure. Especially, skin-tone colors show a tendency to get darker in contrast to normal panel. We’ve tried to minimize 'color shift' through use of LUT (Look Up Table) for linear arithmetic processing of input data, data bit expansion to 12-bit for minimizing arithmetic tolerance and brightness weight of white sub-pixel on each R, G, B pixel. The objective of this study is to minimize and keep Δu'v' value (we commonly use to represent a color difference), quantitative basis of color difference between RGB stripe structure and RGBW quad structure, below 0.01 level (existing 0.02 or higher) using Macbeth colorchecker that is general reference of color characteristics.

Citation Download Citation

Hong Chul Kim, Jae Kyeong Yun, Heume-Il Baek, Ki Duk Kim, Eui Yeol Oh, and In Jae Chung "Minimization of color shift generated in RGBW quad structure.", Proc. SPIE 5666, Human Vision and Electronic Imaging X, (18 March 2005); https://doi.org/10.1117/12.587451

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