Patent ID: 7884892

Claim:
An electro-optical device comprising: a counter substrate; an element substrate comprising a protruding region protruding from one side of the counter substrate and being bonded to the counter substrate; a plurality of pixel units that are arranged in a pixel region on the element substrate; a plurality of external circuit connecting terminals which are arranged in the protruding region on the element substrate and to which various signals including image signals and control signals for allowing the plurality of pixel units to display an image are supplied; and a plurality of test terminals that are provided at both ends of an array of the plurality of external circuit connecting terminals in the protruding region and are supplied with test signals, wherein the plurality of test terminals include the same type of terminals as the plurality of external circuit connecting terminals to which signals similar in type to at least one of the various signals supplied to the plurality of external circuit connecting terminals are supplied as the test signals, the same type of terminals are electrically connected, through resistor elements, to the plurality of external circuit connecting terminals to which at least one of the various signals is supplied, and the same type of signals among the test signals are supplied from the same type of terminals through the resistor elements.