Patent ID: 8159643

Claim:
An electric field driving device in which a plurality of pixels, each of which is formed of two or more sub-pixels that respectively correspond to different colors from one another, are arranged in a matrix in a pixel region on a substrate, comprising: a plurality of pixel electrodes, each of which is formed in correspondence with each of the two or more sub-pixels on the substrate; a common electrode that is formed above the plurality of pixel electrodes on the substrate so that at least part of the common electrode overlaps each of the plurality of pixel electrodes in plan view; an insulating layer that is formed on the substrate between the plurality of pixel electrodes and the common electrode; and a material that is driven by an electric field that is generated on the basis of a difference in electric potential between each of the plurality of pixel electrodes and the common electrode, the common electrode including a plurality of strip portions, a plurality of connecting portions, each of which connects adjacent strip portions of the plurality of strip portions, and a plurality of slits, each of which is surrounded by the plurality of strip portions and the plurality of connecting portions, at least a portion of the plurality of slits overlapping the plurality of pixel electrodes in plan view, the two or more sub-pixels in a pixel of the plurality of pixels being adjacent to each other without a connecting portion therebetween in plan view, same color ones of the two or more sub-pixels of different ones of the plurality of pixels including same numbers of the connecting portions, and a number of the connecting portions included in each of the plurality of pixels being smaller than (p−1)×(q+1), where the number of the plurality of strip portions included in the pixel is p and the number of the two or more sub-pixels included in the pixel is q.