Patent ID: 7633469

Claim:
An electro-optical device substrate that has substrate devices, each composed of at least a portion of an electro-optical device having an image display region, on a surface thereof, and that is divided into the substrate devices along boundaries between regions where the substrate devices are formed, comprising: a plurality of data line groups each of which is composed of n (where n is a natural number equal to or greater than 2) data lines, and which are formed in the image display region of each substrate device forming region; a plurality of image signal terminals which are formed in a peripheral region of the image display region of each substrate device forming region to correspond to the plurality of data line groups, respectively, and which are respectively supplied with multiplex signals of the data line groups obtained by multiplexing n types of image signals along a time axis; a demultiplexer which is formed in the peripheral region of the image display region in each substrate device forming region, and which demultiplexes the multiplex signals input through the plurality of image signal terminals according to selection signals to generate and output the n types of image signals to the n data lines, respectively; driving signal terminals which are formed in the peripheral region of the image display region in each substrate device forming region, and which are supplied with driving signals including the selection signals; and testing wiring lines which are provided in regions other than the substrate device forming regions on the substrate, and which are respectively supplied with testing signals for the substrate devices, two or more image signal terminals being electrically connected to each testing wiring line.