Patent ID: 7812914

Claim:
A display device comprising: a counter board; and an element board, the element board including, a plurality of data signal lines for transmitting a plurality of data signals; a plurality of pixel formation portions disposed in a matrix form, the pixel formation portions being provided in a vicinity of their respective intersections between the plurality of data signal lines and a plurality of scanning signal lines crossing the data signal lines, and each pixel formation portion includes at least one component; and a plurality of dummy pixel portions, each being disposed adjacent to an outermost one of the pixel formation portions, the counter board being provided so as to be opposed to the element board such that electro-optical elements for effecting a display are located between the counter board and the element board, wherein each dummy pixel portion includes at least one component equivalent to any one of a plurality of light blocking effect components for forming a circuit included in the pixel formation portions, and an area of the component included in the dummy pixel portion is smaller than an area of each of the components included in the pixel formation portions, wherein the at least one component included in each pixel formation portion includes at least one of a repair portion to change wiring in the circuit, a memory circuit, and a sensor circuit, and wherein the dummy pixel portions do not include the repair portion, the memory circuit, and the sensor circuit.