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US 6,719,391 B2Granted
Ink jet recording apparatus and ink jet recording method
AssigneeFuji Xerox Co., Ltd.
InventorRyuichi Kojima
Life of this patent
Estimating the term…
Abstract
Of a band border portion which is an area where a black stripe might occur, in an area near a band border portion adjacent to an unrecorded area, recording density is reduced only when the recording density is high. Since recording density in any unnecessary area is not reduced, no white stripe is produced, either. It is therefore possible to obtain an image having no banding.
Claims22
An ink jet recording apparatus comprising:
- a recording head having a plurality of recording elements arrayed for ejecting ink drops including color materials to record recording pixels;
- a recording element control unit for controlling the ejection of the ink drops from the recording elements;
- a main-scanning unit for making the recording head relatively main-scan a recording medium in a first direction while the recording head faces to the recording medium;
- a sub-scanning unit for making the recording head relatively sub-scan the recording medium in a second direction while the recording head faces to the recording medium;
- and
- a scanning control unit for controlling the main-scanning unit and the sub-scanning unit;
- wherein the first and second directions are different from each other;
- wherein the recording elements are actuated with the main-scanning to record bands in which a longitudinal direction thereof is a main-scanning direction;
- and
- wherein an image is recorded by repeating the main-scanning and the sub-scanning;
- and
- wherein the recording element control unit has a recording density control unit for reducing recording density only in an area near a border portion of the bands adjacent to an unrecorded area as long as the recording density is high.
9 more elements
An ink jet recording method comprising the steps of:
- ejecting ink drops including color materials to record recording pixels;
- lining up bands in which a longitudinal direction thereof is a main-scanning direction to form an image while performing main-scanning and sub-scanning in different directions relative to a recording medium;
- and
- reducing recording density only in an area near border portions of the bands adjacent to unrecorded areas of border portions of the bands as long as the recording density is high.
1 more element
Dependencies are inferred from the claim text.