In one embodiment, a driving method for a liquid crystal display device having a backlight is provided. The phase change material in the set state may have a highly nonlinear current-voltage response in a subthreshold voltage region. The controller can perform the shifting process while allowing sufficient margin for division multiplexing and minimal dispersion. Next, image projection by the image projecting section 11-2, at which projection had been stopped until then, is started, and a new image for adjustment projected on the image display section 12 is picked-up by the pick-up section 13 for correction. Once the zip code would be keyed, mail would be accepted, postaged, barcoded, and dropped into a bin inside the machine, where it would remain until retrieved by a postal employee.