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US 12,565,036 B2Granted
Liquid ejecting apparatus and liquid ejection method
AssigneeSeiko Epson Corporation
InventorShunsuke Watanabe
Life of this patent
Estimating the term…
Abstract
a controller controls ejection operations such that the number of ejection operations of the first nozzle is larger than the number of ejection operations of the second nozzle and the number of ejection operations of the fourth nozzle is larger than the number of ejection operations of the third nozzle.
Claims7
A liquid ejecting apparatus comprising:
- a head unit including
- a first nozzle column including a plurality of nozzles aligned in a first direction, and
- a second nozzle column including a plurality of nozzles aligned in the first direction, the second nozzle column being located at a position away from the first nozzle column in a second direction intersecting the first direction, each nozzle of the first nozzle column being located at the same position in the first direction as the corresponding one of the nozzles of the second nozzle column;
- and
- a controller configured to control printing operations of the head unit, wherein
- when a nozzle included in the first nozzle column is defined as a first nozzle,
- the nozzle included in the second nozzle column and located at the same position in the first direction as the first nozzle is defined as a second nozzle,
- a nozzle included in the first nozzle column and located at a position different in the first direction from the position of the first nozzle is defined as a third nozzle, and
- the nozzle included in the second nozzle column and located at the same position in the first direction as the third nozzle is defined as a fourth nozzle,
- the controller is configured to control each printing operation based on a distance between the head unit and a print medium such that:
- (i) when the distance between the head unit and the print medium is a first distance, the number of ejection operations of the first nozzle and the number of ejection operations of the second nozzle are substantially equal and the number of ejection operations of the third nozzle and the number of ejection operations of the fourth nozzle are substantially equal, and
- (ii) when the distance between the head unit and the print medium is a second distance larger than the first distance, the number of ejection operations of the first nozzle is larger than the number of ejection operations of the second nozzle and the number of ejection operations of the fourth nozzle is larger than the number of ejection operations of the third nozzle.
9 more elements
A liquid ejection method for a liquid ejecting apparatus including
- a head unit including
- a first nozzle column including a plurality of nozzles aligned in a first direction, and
- a second nozzle column including a plurality of nozzles aligned in the first direction, the second nozzle column being located at a position away from the first nozzle column in a second direction intersecting the first direction, each nozzle of the first nozzle column being located at the same position in the first direction as the corresponding one of the nozzles of the second nozzle column, wherein
- when a nozzle included in the first nozzle column is defined as a first nozzle,
- the nozzle included in the second nozzle column and located at the same position in the first direction as the first nozzle is defined as a second nozzle,
- a nozzle included in the first nozzle column and located at a position different in the first direction from the position of the first nozzle is defined as a third nozzle, and
- the nozzle included in the second nozzle column and located at the same position in the first direction as the third nozzle is defined as a fourth nozzle,
- the liquid ejection method comprises:
- controlling each printing operation of the head unit based on a distance between the head unit and a print medium such that:
- (i) when the distance between the head unit and the print medium is a first distance, the number of ejection operations of the first nozzle and the number of ejection operations of the second nozzle are substantially equal and the number of ejection operations of the third nozzle and the number of ejection operations of the fourth nozzle are substantially equal, and
- (ii) when the distance between the head unit and the print medium is a second distance larger than the first distance, the number of ejection operations of the first nozzle is larger than the number of ejection operations of the second nozzle and the number of ejection operations of the fourth nozzle is larger than the number of ejection operations of the third nozzle.
8 more elements
Dependencies are inferred from the claim text.