Patent ID: 8618863

Claim:
A signal distribution device, comprising a plurality of signal distribution circuits, each of the plurality of signal distribution circuits including: a single input terminal for receiving an input signal; a plurality of switching elements connected to the input terminal, each of the plurality of switching elements being composed of a thin film transistor; supply lines for supplying, to the plurality of switching elements, the input signal fed to the input terminal; and a plurality of distribution lines connected respectively to a plurality of output terminals via the plurality of switching elements, the plurality of signal distribution circuits each distributing the input signal to the plurality of output terminals via the plurality of switching elements respectively, wherein each of the plurality of switching elements includes: a gate electrode; a first electrode connected to the input terminal via a corresponding one of the supply lines; and a second electrode connected to a corresponding one of the plurality of output terminals via a corresponding one of the plurality of distribution lines, the plurality of signal distribution circuits are each provided with a plurality of control lines respectively connected to, or functioning as, the gate electrodes of the plurality of switching elements, each of the plurality of control lines being for receiving a selection signal for switching on/off a corresponding one of the plurality of switching elements, the corresponding one of the supply lines and at least one of the plurality of distribution lines each have an extension section which extends in an extending direction of a corresponding one of the plurality of control lines, the extension sections are each formed at positions which do not overlap edge portions of the corresponding one of the plurality of control lines in the extending direction thereof, the plurality of switching elements are provided on one of the plurality of control lines in an extending direction of the one of the plurality of control lines, the adjacent switching elements arranged in the extending direction have a gap section therebetween, the one of the plurality of control lines has, at least in the gap section, a slit or slits which extend in the extending direction and a grating section which extends in the extending direction and is grated by the slit or slits, and the extension sections are each formed at positions which do not overlap edge portions of the grating section in an extending direction of the grating section.