Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2008-06-20
2011-11-01
Sajous, Wesner (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S591000, C345S590000, C345S606000, C348S182000, C348S251000, C348S649000, C348S671000, C382S167000, C382S254000, C382S274000
Reexamination Certificate
active
08049765
ABSTRACT:
A color gamut mapping method, which is capable of minimizing a color difference perceived by a person, preventing brightness and contrast from deteriorating, and improving color reproducibility, and a liquid crystal display device using the same are disclosed. The color gamut mapping method includes converting image data having an original gamut into lightness, chroma and hue data, adjusting a primary hue angle of the original gamut according to a reproduction gamut and adjusting the hue data according to the adjustment amount of the primary hue angle, changing the lightness of an original gamut boundary in consideration of a reproduction gamut boundary and changing the brightness data by the change amount of the lightness of the original gamut boundary, deciding a focal point, which is a reference point of color gamut mapping, according to the size, the shape and the position of the original/reproduction gamut in lightness and chroma coordinates, deciding a mapping slope according to the decided focal point FP and a mapping area in which the lightness and chroma data are located and mapping the original gamut to the reproduction gamut according to the decided mapping slope, and converting the lightness, chroma and hue data mapped to the reproduction gamut into image data.
REFERENCES:
patent: 6778185 (2004-08-01), Moroney
patent: 2002/0163669 (2002-11-01), Yamazaki et al.
patent: 2005/0276473 (2005-12-01), Um et al.
patent: 2007/0086028 (2007-04-01), Cho et al.
Ahn Ji Young
Chen Qiao Song
Kang Dong Woo
Kim Choon Woo
Kim Yu Hoon
LG Display Co. Ltd.
Morgan & Lewis & Bockius, LLP
Sajous Wesner
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