Patent ID: 7859499

Claim:
A display apparatus for displaying an image with the use of a plurality of pixels arranged in a matrix, each of the pixels including four color picture elements including a red picture element, a green picture element, a blue picture element, and a white picture element, the display apparatus comprising: a luminance compressing section arranged to generate and output compressed color signals which are obtained by respectively compressing luminances of incoming three color signals, red, green, and blue, in accordance with a luminance of a preceding frame; a luminance extending section arranged to (i) generate luminance extended color signals by respectively extending luminances of the compressed color signals at a luminance extending rate S obtained on the basis of a function F(t) having a ratio t (0≦t≦1) as a variable, where the ratio t is a ratio of a minimum luminance value to a maximum luminance value in the compressed color signals, and (ii) output luminance extended and converted color signals of the three colors, the luminance extended and converted color signals each being obtained by subtracting, from each of the luminance extended color signals, a corrected minimum luminance value obtained by multiplying the minimum luminance value by a coefficient k; and a white calculating section arranged to output the minimum luminance value as a white color signal for the white picture element; wherein the coefficient k is set so that a luminance of the white color signal is equal to or less than a minimum luminance of the luminance extended and converted color signals of the three colors.