Patent ID: 7436387

Claim:
An electrooptical device comprising: a plurality of pixel elements, each of the pixel elements including an electrooptical layer disposed between electrodes, the electrooptical layer of each pixel element including a first cell and a second cell each containing a dispersion medium, and electropheretic particles suspended in the dispersion medium, with a multicolor display being provided by driving the first cell and the second cell within each of the pixel elements, the electropheretic particles in the first cell being colored a first color so as to reflect the first color to reach a viewer and the electropheretic particles in the second cell being colored a second color so as to reflect the second color to reach the viewer, the first color being different from a second color, each of the electropheretic particles being colored only one color, the dispersion medium included in the first cell being colored so as to absorb the first color and the dispersion medium in the second cell being colored so as to absorb the second color, and the first cell displaying the first color in a brightness that corresponds with electrophoretic migration of the electrophoretic particles in the dispersion medium of the first cell, and the second cell displaying the second color in a brightness that corresponds with electrophoretic migration of the electrophoretic particles in the dispersion medium of the second cell.