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Proceedings Paper

Minimization of color shift generated in RGBW quad structure.
Author(s): Hong Chul Kim; Jae Kyeong Yun; Heume-Il Baek; Ki Duk Kim; Eui Yeol Oh; In Jae Chung
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Paper 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.

Paper Details

Date Published: 18 March 2005
PDF: 8 pages
Proc. SPIE 5666, Human Vision and Electronic Imaging X, (18 March 2005); doi: 10.1117/12.587451
Show Author Affiliations
Hong Chul Kim, LG. Philips LCD Co., Ltd. (South Korea)
Jae Kyeong Yun, LG. Philips LCD Co., Ltd. (South Korea)
Heume-Il Baek, LG. Philips LCD Co., Ltd. (South Korea)
Ki Duk Kim, LG. Philips LCD Co., Ltd. (South Korea)
Eui Yeol Oh, LG. Philips LCD Co., Ltd. (South Korea)
In Jae Chung, LG. Philips LCD Co., Ltd. (South Korea)

Published in SPIE Proceedings Vol. 5666:
Human Vision and Electronic Imaging X
Bernice E. Rogowitz; Thrasyvoulos N. Pappas; Scott J. Daly, Editor(s)

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