Patent ID: 8537147

Claim:
A display device, comprising: a display panel including a display portion having a plurality of pixels arranged in a matrix of rows and columns and a plurality of signal lines extending along the column; a flexible substrate electrically connected to the display panel through a connection portion; a driving circuit to drive the signal lines including a first edge opposing to an input side end of the flexible substrate, a second edge opposing to an output side end of the flexible substrate, and a plurality of output terminals arranged along the first and second edges; and an output wiring formed on the flexible substrate and extending in a region between the connection portion and the driving circuit; wherein the output terminals are set so that the output terminals are classified into two groups of valid output terminals to supply a signal to the signal line and invalid output terminals not used to output a signal to the signal line, the valid output terminals are arranged along the second edge of the source driver so as to be sandwiched by the invalid output terminals, the driving circuit includes a selection circuit to select the valid output terminals from the output terminals of the driving circuit by an output number change signal for changing over the number of the valid output terminals, the selection circuit includes a plurality of shift registers connected in series, the shift registers include a first shift register group to output a signal for selecting the valid output terminal group having a plurality of valid output terminals, and a plurality of second shift register groups to output a signal for selecting the invalid output terminal group having a plurality of invalid output terminals, the first shift register group is arranged between the second shift register groups, a first operating circuit is arranged in a preceding stage of the second shift register group to receive the output terminal number change signal and a start pulse, a second operating circuit is arranged in a preceding stage of the first shift register group to receive the output terminal number change signal, the start pulse and the output signal of the second shift register group arranged in the preceding stage of the first shift register group, and in case the number of the output signals of the driving circuit is changed over to the number of the valid output terminals, the first operating circuit outputs a signal to set the invalid output terminal group in a non-selecting state to the second shift register group, and the second operating circuit outputs a signal to select the valid output terminal group to the first shift register group.