Patent ID: 7379080

Claim:
A color display device wherein a unit pixel is constituted by a plurality of subpixels including a first subpixel and a second subpixel which is provided with a color filter, and a medium changing an optical property depending on an applied voltage is disposed at each of the subpixels; the color display device comprising: means for applying, to the first subpixel, a voltage modulating the optical property of the medium disposed at the first subpixel in a range in which a brightness of light passing through the medium is changed and in a range in which the light passing through the medium assumes a chromatic color and a hue of the chromatic color is changed, and means for applying, to the second subpixel, a voltage modulating the optical property of the medium disposed at the second subpixel in a range in which a brightness of light passing through the medium is changed; wherein the color display device further comprises means calculating, when display of the color display device is switched, a correction voltage of the second subpixel from a voltage applied to the first subpixel before the display is switched and a voltage applied to the first subpixel after the display is switched, and means applying, as a voltage applied to the second subpixel, a voltage obtained by superposing the correction voltage on a voltage determined by the display at the second subpixel in a predetermined period after the voltage applied to the first subpixel is switched; and wherein the correction voltage is a voltage which modifies a color of the second subpixel so as to produce an achromatic color by mixing a chromatic color, transitionally appearing at the first subpixel when the display is switched, with the color of the second subpixel.