Patent ID: 8050600

Claim:
An image formation device, comprising: a developer holding body having a developer holding surface which is parallel with a main scanning direction and which holds thereon developer including a number of minute particles; a developer supplying unit configured to carry charged developer to the developer holding body along a developer carrying path, wherein the developer supplying unit comprises: a plurality of first carrying electrodes arranged along the developer carrying path, the plurality of first carrying electrodes serving to carry the developer in a developer carrying direction intersecting with the main scanning direction when a first carrying voltage formed in a traveling waveform is applied to the plurality of first carrying electrodes; a plurality of second carrying electrodes which are arranged along the developer carrying path to face the plurality of first carrying electrodes while sandwiching the developer carrying path between the plurality of first and second carrying electrodes, the plurality of second carrying electrodes serving to carry the developer in the developer carrying direction when a second carrying voltage formed in a traveling waveform is applied to the plurality of second carrying electrodes; a first carrying voltage applying unit configured to apply the first carrying voltage having a first frequency to the plurality of first carrying electrodes; and a second carrying voltage applying unit configured to apply, to the plurality of second carrying electrodes, the second carrying voltage having a second frequency different from the first frequency of the first carrying voltage.