Patent attributes
A display device enabling a superimpose display in which an image is superimposed on a background image with low power consumption is provided. By providing a switch at an input terminal of each stage of a scanning circuit which has a plurality of stages for outputting a sampling pulse or a row selection pulse, and by selecting whether or not to permit an input of a start pulse or each output pulse of a prior stage by the switch, it becomes possible to input a start pulse to an arbitrary mid-stage and output a sampling pulse or a row selection pulse from the stage. Accordingly, the pulse is outputted only to a region where a video signal needs to be updated in a display screen, and a row and a column are selected, thus a new video signal is written thereto.
