Ink Jet printer and printing method
AssigneeFuji Xerox Co., Ltd.
InventorTohru Shimizu
Life of this patent
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Abstract
On the basis of name of a printing medium, which is supplied from a printing medium specifying section, a recording pattern producing section determines whether the printing medium to be printed is a medium in which an ink easily penetrates or that in which an ink hardly penetrates, determines hue changing degree due to bidirectional printing for each pixel from position information of CMYK image data and a scanning pattern, and changes the densities of CMY so that the output density of a hue having a larger hue changing degree in the input image data is lowered, and that of a hue having a smaller hue changing degree is raised. As a result, a total amount of inks ejected from a head of an ink recording section is controlled with respect to the color which is early impacted and that which is lately impacted.
Claims22
An ink jet printer comprising:
- a print head having a nozzle array extending in a sub scanning direction wherein the nozzle array is arranged in a main scanning direction for each color and the print head reciprocally moves in the main scanning direction to print on a recording medium in both forward and reverse directions;
- detection means for detecting a moving direction of the print head in the main scanning direction;
- and
- first control means for increasing an amount of an ink of a lately ejected color in comparison with an amount of an ink of a early ejected color irrespective of the moving direction of the print head detected by the detection means, when printing an image on the recording medium using a mixed color.
An ink jet printer comprising:
- a print head having a nozzle array extending in a sub scanning direction wherein the nozzle array is arranged in a main scanning direction for each color and the print head reciprocally moves in the main scanning direction to print on a recording medium in both forward and reverse directions;
- hue changing degree storage means for storing hue of each color in the forward and reverse directions at a time of printing an image on a recording medium with a mixed color;
- a recording medium specifying section for determining a kind of the recording medium;
- a scanning pattern section for determining a scanning pattern in the main scanning direction of the print head based on a recording mode inputted from external;
- a hue changing degree determining section for referring the hue changing degree storage means to determine the hue changing degree of each color based on the determined kind of the recording medium and the determined scanning pattern;
- a data conversion section for converting image data to be printed based on the determined hue changing degree.
A printing method using a print head having a nozzle array extending in a sub scanning direction wherein the nozzle array is arranged in a main scanning direction for each color and the print head reciprocally moves in the main scanning direction to print on a recording medium in both forward and reverse directions, the printing method comprising the steps of:
- detecting a moving direction of the print head in the main scanning direction;
- and
- increasing an amount of an ink of a lately ejected color in comparison with an amount of an ink of a early ejected color irrespective of the detected moving direction of the print head, when printing an image on the recording medium using a mixed color.
A printing method using a print head having a nozzle array extending in a sub scanning direction wherein the nozzle array is arranged in a main scanning direction for each color and the print head reciprocally moves in the main scanning direction to print on a recording medium in both forward and reverse directions, the method comprising the steps of:
- determining a kind of the recording medium;
- determining a scanning pattern in the main scanning direction of the print head based on a recording mode inputted from external;
- referring hue changing degree storage means for storing hue of each color in the forward and reverse directions at a time of printing an image on a recording medium with a mixed color, to determine the hue changing degree of each color based on the determined kind of the recording medium and the determined scanning pattern;
- converting image data to be printed based on the determined hue changing degree.
Dependencies are inferred from the claim text.