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.