Patent ID: 7768585

Claim:
A display device comprising: a substrate having a display area and a non-display area; a plurality of pixel electrodes arrayed in a matrix within the display area on the substrate; a plurality of switching thin-film transistors connected respectively to the pixel electrodes; and a plurality of scanning lines to supply a scanning signal to the switching thin-film transistors; wherein the non-display area of the substrate includes a driver mounting area in which a driver for driving the scanning lines is mounted; wherein a static-electricity protecting circuit for controlling discharge of static electricity applied to the scanning lines and connection terminals for electrically connecting the driver to the scanning lines are provided in the driver mounting area; wherein the static-electricity protecting circuit includes a diode-connected thin film transistor, which comprises a gate electrode and a drain electrode which are formed of different layers and which are electrically connected to one of the connection terminals; wherein the static-electricity protecting circuit includes a static-electricity protecting line, and the diode-connected thin film transistor is connected between the static-electricity protecting line and said one of the connection terminals; wherein the static-electricity protecting circuit includes a thin film transistor of a floating gate type; and wherein the diode-connected thin film transistor and the thin film transistor of a floating gate type are connected in parallel to each other between the static-electricity protecting line and said one of the connection terminals.