Active matrix liquid crystal display having a spatial coordinates input function

Claim 1

An active matrix liquid crystal display, comprising: a substrate on an active element side including a first insulating substrate, switching elements, pixel electrodes, and scan lines and data lines for writing data in the pixels, the switching elements, the pixel electrodes, and the scan and data lines being formed on the first insulating substrate; a second insulating substrate on an opposing electrode side, said second insulating substrate including a transparent conductive layer; a liquid crystal layer enclosed between the substrate on the active element side and the second insulating substrate on the opposing electrode side; a plurality of first and second electrodes, said first and second electrodes being vertical to each other on the second insulating substrate on the opposing electrode side; an insulating layer inserted between the first and second electrodes; means for externally controlling the potential of each of the first and second electrodes in an independent manner; means for sensing electric charge generated by the first and second electrodes; and a transparent conductive layer formed under the first and second electrodes, wherein the first and second electrodes are formed with a conductive substance having a light interrupting characteristic; and wherein the first and second electrodes are arranged in locations opposing areas occupied by gaps between the pixel electrodes and the switching elements on the first substrate on the active element side.