Patent ID: 8451260

Claim:
A display apparatus comprising: a display panel including, a plurality of video signal lines, a plurality of scanning signal lines intersecting the video signal lines, and a thin-film transistor which is formed near each intersection of the scanning signal lines and the video signal lines, where a pixel region is defined in a region surrounded by a pair of adjacent scanning signal lines and a pair of adjacent video signal lines; and a scanning signal line driver circuit which is formed on the same board as the display panel so as to sequentially apply a select signal to the scanning signal lines, wherein the scanning signal line driver circuit is connected to a plurality of shift registers that outputs an output signal, which is obtained by shifting a start pulse, as a start pulse of a next stage, each of the shift registers including, a first element controlled by a first potential node to supply a first driving voltage to an output terminal, a second element controlled by a second potential node to supply a second driving voltage lower than the first driving voltage to the output terminal, and a third element for controlling the first potential node and the second potential node so as to have opposite potential levels, and wherein when it is assumed that a voltage applied to a gate terminal of the third element is A, a voltage applied to a first terminal thereof is B, a voltage applied to a second terminal thereof is C, voltages are applied to the third element so that a state of A>B and A>C and a state of A<B and A<C, or a state of A>B and A<C and a state of A<B and A>C, or a state of A<B and A>C and a state of A>B and A<C are switched alternately.