Printing apparatus, printing method, and computer program
AssigneeSeiko Epson Corporation
InventorHirohisa OZAWA
Life of this patent
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Abstract
A printing apparatus includes a first nozzle which ejects first ink containing a black coloring material, a second nozzle which ejects second ink with a low content rate of the coloring material compared to the first ink, and a control unit which controls ejecting of the ink from the first and second nozzles, in which, in a case of printing a darkest point, the control unit causes the second ink to be ejected after causing the first ink to be ejected, and causes the second ink to be ejected from the second nozzle so that a use rate of the second ink becomes 1% or more and 15% or less, when causing the second ink to be ejected.
Claims5
A printing apparatus which prints an image on a printing medium based on image data comprising:
- a first nozzle which ejects first ink containing a black coloring material;
- a second nozzle which ejects second ink with a low content rate of the coloring material compared to the first ink;
- and
- a control unit which controls ejecting of the first ink from the first nozzle, and ejecting of the second ink from the second nozzle,
- wherein, in a case of printing a darkest point, the control unit causes
- the second ink to be ejected from the second nozzle after causing the first ink to be ejected from the first nozzle, and causes
- the second ink to be ejected from the second nozzle so that a use rate of ink which is a ratio of ejected weight of the second ink ejected per unit area to a total weight of the second ink in a case in which the second ink is ejected to all of pixels included in the unit area of the printing medium becomes 1% or more and 15% or less.
A printing method of printing an image on a printing medium based on image data using a printing apparatus which includes a first nozzle which ejects first ink containing a black coloring material, and a second nozzle which ejects second ink with a low content rate of the coloring material compared to the first ink, the method comprising:
- ejecting ink in which the second ink is ejected from the second nozzle after the first ink is ejected from the first nozzle, in a case of printing a darkest point,
- wherein the ejecting ink includes ejecting the second ink from the second nozzle so that a use rate of ink which is a ratio of ejected weight of the second ink ejected per unit area to a total weight of the second ink in a case in which the second ink is ejected to all of pixels included in the unit area of the printing medium becomes 1% or more and 15% or less.
A computer program for printing an image on a printing medium based on image data using a printing apparatus which includes a first nozzle which ejects first ink containing a black coloring material, and a second nozzle which ejects second ink with a low content rate of the coloring material compared to the first ink, the program causes a computer to execute:
- a function of controlling ejecting of ink in which the second ink is ejected from the second nozzle after the first ink is ejected from the first nozzle, in a case of printing a darkest point,
- wherein the function of controlling ejecting of ink includes a function of causing the second ink to be ejected from the second nozzle so that a use rate of ink which is a ratio of ejected weight of the second ink ejected per unit area to a total weight of the second ink in a case in which the second ink is ejected to all of pixels included in the unit area of the printing medium becomes 1% or more and 15% or less.
Dependencies are inferred from the claim text.