Patent ID: 8300072

Claim:
An electrophoretic display comprising: a display panel including first, second and third pixel areas arranged in a first direction, each of the first, second and third pixel areas having a main area and a sub area adjacent to the main area, each sub area displaying a white color, the display panel comprising a plurality of electrophoretic particles that has a color and a polarity and is arranged in the first, second and third pixel areas, the display panel receiving gray-scale voltages of the main and sub areas to display an image; and a gray-scale generator receiving an image signal to generate a gray-scale value corresponding to the main area of each of the first, second and third pixel areas, generating a gray-scale value corresponding to the sub area of each of the first, second and third pixel areas by using the gray-scale value corresponding to the main area of each of the first, second and third pixel areas, and outputting the gray-scale voltages according to generated gray-scale values, wherein the gray-scale generator generates a first gray-scale value corresponding to the white color based on a brightness ratio between the main areas of the first to third pixel areas and the gray-scale values of the main areas, and at least one of the sub areas has the first gray-scale value, wherein the first gray-scale value is obtained by adding a first value obtained by multiplying a first brightness ratio constant by the gray-scale value of the main area of the first pixel area, a second value obtained by multiplying a second brightness ratio constant by the gray-scale value of the main area of the second pixel area, and a third value obtained by multiplying a third brightness ratio by the gray-scale value of the main area of the third pixel area, and wherein the first, second and third brightness ratio constants are obtained from a brightness ratio between the main areas of the first to third pixel areas when the main areas of the first, second and third pixel areas have a same gray-scale value; and wherein the gray-scale generator multiplies a smallest gray-scale value among the gray-scale values of the main areas of the first to third pixel areas by a white ratio constant to calculate a second gray-scale value corresponding to the white color, a remaining sub area not including the at least one sub area has the second gray-scale value, and the white ratio constant is used to adjust a white color ratio with respect to a color generated by mixing colors displayed in the first to third pixel areas and has a value of about 0 to about 1.