Patent ID: 9272530
Filing Date: 2016-03-01
CPC Classification: B41J

Claim Text:
1. A droplet discharging apparatus comprising: a first head and a second head which form dots by discharging droplets onto a medium; a scanning moving unit which moves the first head and the second head in ±X directions on the medium; a medium moving unit which moves the medium in a Y direction intersecting the X direction; and a control unit which performs control of driving of the scanning moving unit and the medium moving unit and control discharging of the droplets from the first head and the second head, wherein the control unit alternately repeats a droplet discharging operation of discharging the droplets onto the medium by using the first head and the second head that are moved by the scanning moving unit in the X direction or in the −X direction and a medium moving operation of moving the medium by the medium moving unit in the Y direction intersecting the X direction to form the dots on a first region by using the first head, to form the dots on a second region which is positioned in a −Y direction from the first region to be connected to the first region by using the first head and the second head so that, when a ratio of the number of dots formed by using the second head to the sum of the number of dots formed by using the first head and the number of dots formed by using the second head is referred to as a second head use ratio in rows of the dots which are lined up in the X direction, the second head use ratio is increased from a value less than a first set value to a value greater than a second set value greater than the first set value in the −Y direction in a plurality of rows of the dots lined up in the X direction, and to form the dots on a third region which is positioned in the −Y direction from the second region to be connected to the second region by using the first head and the second head so as to cause the second head use ratio to be constant, and wherein a length in the Y direction of the first region is shorter than a length in the Y direction of the third region.