Importance

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Abstract

A display apparatus includes a luminance compressing section, a luminance extending section, and a W calculating section. The luminance compressing section subjects three color signals to luminance compression according to a luminance in a preceding frame, and outputs compressed color signals. The luminance extending section outputs luminance extended and converted color signals of respective three colors. Each of the luminance extended and converted color signals is obtained by subtracting a corrected minimum luminance value from a luminance extended color signal which is obtained by subjecting the compressed color signal to luminance extension at a luminance extending rate S in accordance with a function F(t). The function F(t) has as a variable a ratio t of a minimum luminance value to a maximum luminance value of the compressed color signals. The corrected minimum luminance value is obtained by multiplying the minimum luminance value by a coefficient k. The W calculating section outputs the minimum luminance value as a white signal. The function F(t) has a constant according to light emitting efficiencies of four color picture elements. The coefficient k is set so that a luminance of the W (white) color signal becomes equal to or less than a minimum luminance of the luminance extended and converted color signals of the three colors.

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First Claim