Patent ID: 7710389

Claim:
A display device comprising: at least a first display layer and a second display layer over the first display layer, each display layer comprising one or more cells each containing a fluid and a set of colored particles dispersed in the fluid; and one or more dot field applicators associated with each of the one or more cells in each display layer, wherein for every display layer of the display device the colored particles in a same display layer all exhibit a same color, wherein the colored particles in each different display layer exhibit a different color, wherein the one or more dot field applicators comprise circular dot electrodes, wherein each display layer comprises a multiplicity of cells, and widthwise edges of each of the multiplicity of cells in the second display layer is in vertical alignment with widthwise edges of a corresponding one of the multiplicity of cells in the first display layer, and wherein in corresponding vertically aligned cells of the second display layer and the first display layer, the one or dot field applicators in the aligned cell of the second display layer are offset from the one or more circular dot electrodes in the aligned cell in the first display layer.