There is provided a filling method which is capable of suppressing uneven distribution of particle diameter and suppressing property decrease of the particulate water-absorbing agent. An analog signal AOUT is outputted from an analog signal generating section 3 in which an adjustment signal AD is inputted. The first substrate has a plurality of pixel unit each including a data line, a scan line, a switch element, a first pixel electrode, a second pixel electrode, a first aligning electrode and a second aligning electrode.