Patent ID: 8704762

Claim:
A display device comprising: a coordinate input device including a transparent substrate having detection electrodes disposed in a detection region corresponding to a contact position, the transparent substrate having a first signal interconnect disposed in a region outside the detection region, the first signal interconnect having one end connected to the detection electrodes and being formed with a first electrode terminal at the other end thereof, and a flexible interconnect substrate connected to the first electrode terminal, the flexible interconnect substrate used for supplying a driving signal to the detection electrodes by way of the first signal interconnect and extracting a detection signal from the detection electrodes; and a display panel for image display based on a video signal from an external system, the coordinate input device being disposed on the display panel at the side of a display screen; wherein the coordinate inputting device has a second signal interconnect disposed outside the first signal interconnect but near the peripheral edge of the transparent substrate, the second signal interconnect surrounding the area where the detection region is included and the first signal interconnect is formed, the second signal interconnect being opened at opposite ends thereof and being connected to respective electrode terminals for inspection at the open ends, wherein the second signal interconnect is formed of a thin conductive film disposed along the peripheral edge portion of the transparent substrate; and wherein the second signal interconnect is disposed along the peripheral edge of three sides of the transparent substrate.