19 January 2009 Sub-pixel-based MVA LCTV characterization and color modeling
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Abstract
Nowadays, multi-domain vertical alignment (MVA) LCD technology is becoming the mainstream approach for LCTV industry due to its high contrast ratio and wide viewing angle property. However, like many other types of LCD devices, MVA still has the problem of color shift, namely color washout, between normal and oblique viewing angle. In particular, MVA shows an evident gamma curve distortion at large oblique viewing angle. This paper formulates the MVA LCTV color performance in two stages. First, an in-depth LCD characterization was performed on an MVA LCTV with consideration of spectral characteristic, backlight leakage, sub-pixel crosstalk, primary shift. Also, micrograph based sub-pixel analysis was employed and suggested that the off-axis color shift problem of MVA can be improved by using dual sub-pixel technology. Next, a generic LCD color model was proposed to relate the RGB input with the output tristimulus value in XYZ. Sub-pixel based image rendering was performed and the results show the feasibility of LCD color prediction with high colorimetric accuracy both at on-axis and off-axis viewing condition by using the proposed generic color model.
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Jiaying Wu, Xiaofan Feng, Scott J. Daly, "Sub-pixel-based MVA LCTV characterization and color modeling", Proc. SPIE 7241, Color Imaging XIV: Displaying, Processing, Hardcopy, and Applications, 72410C (19 January 2009); doi: 10.1117/12.813809; https://doi.org/10.1117/12.813809
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