Driving circuit and display device using same

A display device comprising (i) pixel arrays including a plurality of effective pixels for displaying an image, (ii) a data signal line driving circuit for supplying a video signal to the pixel arrays, and (iii) a scanning signal line driving circuit for controlling writing of the video signal into the pixels, the data signal line driving circuit, wherein:

• the data signal line driving circuit includes a driving circuit for driving a plurality of signal lines comprising a shift register circuit for shifting a start pulse in two directions in accordance with two clock signals having different phases and an analog switch circuit, which is provided for each signal line, for sampling a video signal by respectively using output signals supplied from output stages of the shift register circuit;
• the driving circuit includes a signal line switching circuit section;
• the signal line switching circuit section includes a switching circuit for associating each signal line with two adjacent ones of the output stages, one of which follows the other, receiving the output signals supplied from the two adjacent ones of the output stages and a control signal indicative of the shifting direction, and being switchable so that the signal lines are driven either by the following output stages or by the followed output stages;
• the number of the output stages of the shift register circuit is n+m, and the number of the switching circuits in the signal line switching circuit section is n+m+1, so as to deal with the number of the signal lines associated with a dummy pixel column provided next to a group of effective pixel columns, where n is a positive even number representing the number of the signal lines, which corresponds to the number of the effective pixel columns, and m is a positive odd number;
• the signal lines connected to the effective pixel columns are alternatively driven by the output signals supplied from the inmost two output stages among the (m+1)/2 number of outmost output stages of the shift register circuit;
• and
• the two outmost switching circuits among the n+m+1 number of the switching circuits respectively receive dummy signals, which are OFF-level signals that do not turn ON the analog switch circuits, as well as the output signals supplied from the outmost output stages of the shift register circuit connected thereto.

A display device comprising (i) pixel arrays including a plurality of effective pixels for displaying an image, (ii) a data signal line driving circuit for supplying a video signal to the pixel arrays, and (iii) a scanning signal line driving circuit for controlling writing of the video signal into the pixels, wherein:

• at least one of the data signal line driving circuit and the scanning signal line driving circuit includes:
• a driving circuit comprising (a) a shift register circuit for shifting a start pulse in two directions in accordance with two clock signals having different phases and (b) a plurality of signal lines that are respectively driven by output signals supplied from respective output stages of the shift register circuit,
• the driving circuit including:
• a group of switching circuits for switching over as to which signal line is driven by which output stage of the shift register circuit.