Patent ID: 7199776

Claim:
An image display method comprising: irradiating light from a light source to a light-receiving display device to display an image; providing a correlation between adjustment of luminance of the display device and adjustment of luminance of the light source in accordance with entered display data; determining a characteristic-determining amount from the display data; providing luminance transformation of luminance taken out of the display data, thereby providing a luminance-transformed luminance; and adjusting the luminance of the display device in accordance with the luminance-transformed luminance, wherein the luminance transformation has transformation characteristics in which different slope averages in the vicinity of the characteristic-determining amount are exhibited in an area defined by a horizontal axis showing luminance “I” taken out of the display data and a vertical axis showing luminance-transformed luminance “I#”, and wherein in the transformation characteristics, a region having luminance smaller than the characteristic-determining amount is set to have an average slope greater than an average slope of a region having luminance greater than the characteristic-determining amount.