Patent ID: 9321282
Filing Date: 2016-04-26
CPC Classification: B41J

Claim Text:
1. A drying device comprising: a laser element that irradiates an irradiation region with a laser, the irradiation region including a plurality of droplets on a recording medium which are ejected by an ejection unit, ejecting droplets according to an image, along a transport direction of the recording medium and a direction crossing the transport direction; a plurality of laser element groups that are arranged in the transport direction of the recording medium, each laser element group including a plurality of the laser elements; and a driving unit that drives the laser element group for each laser element group, wherein the drying device dries water-based ink droplets being the plurality of droplets, the driving unit sets an irradiation intensity of a laser emitted from the laser element group for each laser element group by determining a magnitude relation between a front face printing rate and a back face printing rate of the recording medium which is included in the irradiation region corresponding to each of the laser elements of the laser element group, the front face printing rate is a printing rate of the recording medium on a laser irradiation surface included in the irradiation region corresponding to each of the laser elements of the laser element group, and the back face printing rate is a printing rate of the recording medium on a back face of the laser irradiation surface included in the irradiation region corresponding to each of the laser elements of the laser element group.