Pattern formation device, liquid ejection device, and electrical fault detection method
AssigneeFUJIFILM Corporation
InventorTadashi Kyoso
Life of this patent
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Abstract
A pattern formation device, a liquid ejection device, and an electrical fault detection method capable of detecting electrical fault of a liquid ejection head on the basis of an analysis result of an electrical fault detection pattern are provided. An electrical fault detection pattern having an arrangement of dot arrays satisfying an arrangement condition with an arrangement of a plurality of ejection elements in a liquid ejection head is formed by ejecting liquid from a liquid ejection head in which M rows of ejection element groups in which a plurality of ejection elements are arranged in a first direction are arranged in a second direction intersecting the first direction, and M is an integer equal to or greater than 2.
Claims25
A pattern formation device that forms, in a medium, an electrical fault detection pattern that is used when electrical fault of a liquid ejection head is detected, by ejecting liquid from the liquid ejection head in which M rows of ejection element groups in which a plurality of ejection elements are arranged in a first direction are arranged in a second direction intersecting the first direction, M being an integer equal to or greater than 2, the pattern formation device comprising:
- an ejection data acquisition unit that acquires ejection data of the electrical fault detection pattern when the electrical fault detection pattern is formed on a medium;
- and
- a driving voltage supply unit that supplies a driving voltage to each of the plurality of ejection elements on the basis of the ejection data acquired using the ejection data acquisition unit,
- wherein the ejection data acquisition unit acquires ejection data of the electrical fault detection pattern including a first dot set in which a plurality of first dot arrays each including one or more dots formed by ejecting liquid from a plurality of respective ejection elements belonging to an ejection element group of a j-th row are arranged along a first dot set first axis, and a second dot set in which a plurality of second dot arrays each including one or more dots formed by ejecting liquid from a plurality of respective ejection elements belonging to an ejection element group of an i-th row are arranged along a second dot set first axis, i being an integer equal to greater than 2 and equal to or smaller than M and j being an integer smaller than i, equal to greater than 1 and equal to or smaller than M−1, an approximate straight line indicating an arrangement direction of the plurality of first dot arrays being the first dot set first axis, an axis orthogonal to the first dot set first axis being a first dot set second axis, a direction from the first dot set to the second dot set being a positive direction of the first dot set second axis, and a maximum value of a coordinate value of the first dot set second axis of the plurality of first dot arrays being a value smaller than a minimum value of the coordinate value of the first dot set second axis of the plurality of second dot arrays.
A liquid ejection device, comprising:
- a liquid ejection head in which M rows of ejection element groups in which a plurality of ejection elements are arranged in a first direction are arranged in a second direction intersecting the first direction, M being an integer equal to or greater than 2;
- a relative conveyance unit that relatively conveys the liquid ejection head and a medium in a relative conveyance direction;
- an ejection data acquisition unit that acquires ejection data of an electrical fault detection pattern when liquid is ejected from the plurality of ejection elements and the electrical fault detection pattern for detecting electrical fault of the liquid ejection head is formed on a medium;
- and
- a driving voltage supply unit that supplies a driving voltage to each of the plurality of ejection elements on the basis of the ejection data acquired using the ejection data acquisition unit,
- wherein the ejection data acquisition unit acquires ejection data of the electrical fault detection pattern including a first dot set in which a plurality of first dot arrays each including one or more dots formed by ejecting liquid from a plurality of respective ejection elements belonging to an ejection element group of a j-th row are arranged along a first dot set first axis, and a second dot set in which a plurality of second dot arrays each including one or more dots formed by ejecting liquid from a plurality of respective ejection elements belonging to an ejection element group of an i-th row are arranged along a second dot set first axis, i being an integer equal to greater than 2 and equal to or smaller than M and j being an integer smaller than i, equal to greater than 1 and equal to or smaller than M−1, an approximate straight line indicating an arrangement direction of the plurality of first dot arrays being the first dot set first axis, an axis orthogonal to the first dot set first axis being a first dot set second axis, a direction from the first dot set to the second dot set being a positive direction of the first dot set second axis, and a maximum value of a coordinate value of the first dot set second axis of the plurality of first dot arrays being a value smaller than a minimum value of the coordinate value of the first dot set second axis of the plurality of second dot arrays.
An electrical fault detection method of detecting electrical fault of a liquid ejection head in which M rows of ejection element groups in which a plurality of ejection elements are arranged in a first direction are arranged in a second direction intersecting the first direction, M being an integer equal to or greater than 2, the method comprising:
- an ejection data acquisition step of acquiring ejection data of an electrical fault detection pattern when the electrical fault detection pattern that is used when electrical fault of the liquid ejection head is detected is formed on a medium;
- a driving voltage supply step of supplying a driving voltage to each of the plurality of ejection elements on the basis of the ejection data acquired in the ejection data acquisition step;
- and
- a determination step of analyzing the electrical fault detection pattern formed on the medium and determining whether or not there is electrical fault of the liquid ejection head,
- wherein the ejection data acquisition step includes acquiring ejection data of the electrical fault detection pattern including a first dot set in which a plurality of first dot arrays each including one or more dots formed by ejecting liquid from a plurality of respective ejection elements belonging to an ejection element group of a j-th row are arranged along a first dot set first axis, and a second dot set in which a plurality of second dot arrays each including one or more dots formed by ejecting liquid from a plurality of respective ejection elements belonging to an ejection element group of an i-th row are arranged along a second dot set first axis, i being an integer equal to greater than 2 and equal to or smaller than M and j being an integer smaller than i, equal to greater than 1 and equal to or smaller than M−1, an arrangement direction of the plurality of first dot arrays being the first dot set first axis, an axis orthogonal to the first dot set first axis being a first dot set second axis, a direction from the first dot set to the second dot set being a positive direction of the first dot set second axis, and a maximum value of a coordinate value of the first dot set second axis of the plurality of first dot arrays being a value smaller than a minimum value of the coordinate value of the first dot set second axis of dots constituting the plurality of second dot arrays.
Dependencies are inferred from the claim text.