Color signal converter, display unit, color signal conversion program, computer-readable storage medium storing color signal conversion program, and color signal conversion method

A color signal converter that converts a three-primary-color signal to an n-color signal (n≧4),

• the color signal converter comprising:
• a first color signal generation module for generating, by subjecting the three-primary-color signal to isochromatic conversion, an m-color signal made up of m color components (m≧n) including respective color components that are equivalent in terms of color to color components of the n-color signal;
• a second color signal generation module for generating the color components of the n-color signal, by performing linear combination of the color components of the m-color signal;
• and
• a coefficient change module for changing coefficients of the linear combination performed by the second color signal generation module,
• in a case where a hue value of a k-color component (1≦k≦m) of the m-color signal is different from an expected value, the coefficient change module adding, to a hue value of an i-color component different from the k-color component, an adjusted value worked out by multiplying the hue value of the k-color component by a predetermined coefficient and subtracting, from a hue value of a j-color component different from the k-color component and the i-color component, the adjusted value worked out by multiplying the hue value of the k-color component by the predetermined coefficient.