Patent ID: 8125607

Claim:
An electro optical device comprising: a first substrate; a plurality of pixel electrodes arranged in a pixel area at a predetermined pixel pitch over the first substrate; an interlayer insulation film disposed below the pixel electrodes; scanning lines disposed below the interlayer insulation film; data lines disposed below the interlayer insulation film, each of the data lines intersecting the scanning lines, the data lines being divided into data line blocks for each N (herein, N is an integer not less than 2) data lines; electronic components disposed below the interlayer insulation film in the pixel area and electrically connected to the pixel electrodes, at least one of the data lines and electronic components including conducting films; a second substrate oppositely disposed to the first substrate; a sealing material for bonding the first substrate and the second substrate together in a seal area along a periphery of the pixel area; video signal terminals disposed along a side of the first substrate; video signal lines provided in a one-to-one correspondence with the data line blocks, the video signal lines passing under the sealing material and electrically connecting to the video signal terminals respectively; a selection circuit including a plurality of switches corresponding to corresponding ones of the plurality of data lines, the selection circuit using the switches to select one data line of the corresponding data line block at a time and outputting the video signal supplied from the video signal line that corresponds to the block to the selected one data line; a constant potential line for supplying a constant potential being included on the first substrate, the constant potential line including a portion which is arranged along an outside edge of the seal area; and dummy wirings arranged along the periphery of the pixel area, the dummy wirings being formed by the same film as the conducting films of the at least one of the data lines and the electronic components, the dummy wirings being disposed between two adjacent video signal lines where the two adjacent video signal lines pass under the sealing material, each of the dummy wirings having a portion overlapping the seal area and being electrically connected to the portion of the constant potential line, each of the dummy wirings protruding from the portion of the constant potential line toward the seal area and not protruding from the portion of the constant potential line toward the video signal terminals in plan view.