Ink-jet recording method and ink-jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHidehiko Kanda, Jiro Moriyama
Life of this patent
Estimating the term…
Abstract
An ink-jet recording method includes the steps of recording black circles of a black ink ejected by black ink nozzles at the positions corresponding to a resolution of, for example, 600 dpi, and recording black dots of the black ink formed by selectively mixing cyan, magenta, and yellow inks at the positions offset by a distance corresponding to a resolution of 1200 dpi, thereby forming a black image having high resolutions, whereby the black image can be recorded at a high speed and with high resolutions.
Claims16
An ink-jet recording apparatus for performing recording by ejecting ink onto a recording medium while moving a recording head relative to the recording medium in a scanning direction, comprising:
- a first nozzle unit including a plurality of nozzles for ejecting black ink disposed in line in a direction different from the scanning direction;
- a second nozzle unit including a plurality of nozzles for ejecting colored inks disposed in line in a direction different from the scanning direction and at a density higher than a density of the nozzles included in the first nozzle unit, the plurality of nozzles for ejecting colored inks being capable of forming black ink by mixing colored inks;
- and
- means for recording a black image with black dots of the black ink ejected by the first nozzle unit and a mixture of dots of the color inks ejected by the second nozzle unit, the black dots being formed with a predetermined resolution in a secondary scanning direction different from the scanning direction and the mixture dots being formed in a region between the black dots formed with a predetermined resolution in the secondary scanning direction, such that the black image is recorded with a resolution higher than a resolution of the black image when recorded only by the first nozzle unit.
An ink-jet recording apparatus for performing recording by ejecting ink onto a recording medium while moving a recording head relative to the recording medium in a scanning direction, comprising:
- a first nozzle unit including a plurality of nozzles for ejecting black ink disposed in line in a direction different from the scanning direction;
- a second nozzle unit including a plurality of nozzles for ejecting colored inks disposed in line in a direction different from the scanning direction and at a density higher than a density of the nozzles included in the first nozzle unit, the plurality of nozzles for ejecting colored inks being capable of forming black ink by mixing colored inks;
- and
- means for selectively recording in one of a first recording mode, in which a black image is recorded with black dots of the black ink ejected by the first nozzle unit, and a second recording mode, in which the first nozzle unit records the black image and the second nozzle unit records with a mixture of dots of the color inks ejected by the second nozzle unit, the black dots being formed with a predetermined resolution in a secondary scanning direction different from the scanning direction and the mixture dots being formed in a region between the black dots formed with a predetermined resolution in the secondary scanning direction, such that the black image is recorded with a resolution higher than a resolution of the black image when recorded only by the first nozzle unit.
An ink-jet recording apparatus for performing recording by ejecting ink onto a recording medium while moving a recording head relative to the recording medium in a scanning direction, comprising:
- a first nozzle including a plurality of nozzles for ejecting black ink disposed in line in a direction different from the scanning direction;
- a second nozzle unit including a plurality of nozzles for ejecting colored inks disposed in line in a direction different from the scanning direction and at a density higher than a density of the nozzles included in the first nozzle unit, the plurality of nozzles for ejecting colored inks-being capable of forming black ink by mixing colored inks;
- and
- means for recording a black image with black dots of the black ink ejected by the first nozzle unit and a mixture of dots of the color inks ejected by the second nozzle unit, the black dots being formed with a predetermined resolution in a secondary scanning direction different from the scanning direction and the mixture dots being formed in a region between the black dots formed with a predetermined resolution in the secondary scanning direction, such that the black image is recorded with a resolution higher than a resolution of the black image when recorded only by the first nozzle unit.
An ink-jet recording apparatus for performing recording by ejecting ink onto a recording medium while moving a recording head relative to the recording medium in a scanning direction, comprising:
- a first nozzle unit including a plurality of nozzles for ejecting black ink disposed in line in a direction different from the scanning direction;
- a second nozzle unit including a plurality of nozzles for ejecting colored inks disposed in line in a direction different from the scanning direction and at a density higher than a density of the nozzles included in the first nozzle unit, the plurality of nozzles for ejecting colored inks being capable of forming black ink by mixing colored inks;
- and
- means for selectively recording in one of a first recording mode in which a black image is recorded with black dots of the black ink ejected by the first nozzle unit and a second recording mode in which the first nozzle units records the black image and the second nozzle unit records with a mixture of dots of the color inks ejected by the second nozzle unit, the black dots being formed with a predetermined resolution in a secondary scanning direction different from the scanning direction and the mixture dots being formed in a region between the black dots formed with a predetermined resolution in the secondary scanning direction, such that the black image is recorded with a resolution higher than a resolution of the black image when recorded only by the first nozzle unit.
An ink-jet recording method for performing recording by ejecting ink onto a recording medium while moving a recording head relative to the recording medium in a scanning direction, using a first nozzle unit including a plurality of nozzles for ejecting black ink disposed in line in a direction different from the scanning direction, and a second nozzle unit including a plurality of nozzles for ejecting colored inks disposed in line in a direction different from the scanning direction and at a density higher than a density of the nozzles included in the first nozzle unit, the plurality of nozzles for ejecting colored inks being capable of forming black ink by mixing colored inks, said method comprising the step of:
- recording a black image with black dots of the black ink ejected by the first nozzle unit and a mixture of dots of the color inks ejected by the second nozzle unit, the black dots being formed with a predetermined resolution in a secondary scanning direction different from the scanning direction and the mixture dots being formed in a region between the black dots formed with a predetermined resolution in the secondary scanning direction, such that the black image is recorded with a resolution higher than a resolution of the black image when recorded only by the first nozzle unit.
Dependencies are inferred from the claim text.