Recording method to determine whether a nozzle performing defective discharge exists in a recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHirokazu Yoshikawa, Hidehiko Kanda
Life of this patent
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Abstract
A pattern forming method that includes forming a pattern for detecting defective discharges of a plurality of ink discharging nozzles and recording a first dot pattern with the plurality of ink discharging nozzles. The pattern forming method also includes recording a second dot pattern to be adjacent to at least one side of the first dot pattern in the predetermined direction.
Claims18
A method for recording with a recording head, wherein the recording head includes a nozzle array having a plurality of nozzles for discharging ink arranged in a predetermined direction and performs reciprocating movement in a scanning direction crossing the predetermined direction, the method comprising:
- performing first recording for recording a first dot pattern on a recording medium by driving a nozzle group including a series of some nozzles, but not all of the nozzles, among the plurality of nozzles and without driving nozzles that are not included in the nozzle group among the plurality of nozzles, to discharge ink onto the recording medium;
- conveying the recording medium in the predetermined direction, after the first recording, for a distance corresponding to a width of the nozzle group;
- performing second recording for recording a second dot pattern on the conveyed recording medium by driving the nozzle group to discharge ink onto the recording medium;
- obtaining, using an optical sensor, a signal value of an image regarding the predetermined direction based on the first dot pattern and the second dot pattern;
- and
- determining, based on the obtained signal value, whether a discharge nozzle performing defective discharge exists among the nozzle group.
A recording apparatus for recording, the recording apparatus comprising:
- a recording head, wherein the recording head includes a nozzle array having a plurality of nozzles for discharging ink arranged in a predetermined direction and is configured to perform reciprocating movement in a scanning direction crossing the predetermined direction;
- a recording unit configured to perform first recording to record a first dot pattern on a recording medium by driving a nozzle group including a series of some nozzles, but not all of the nozzles, among the plurality of nozzles, and without driving nozzles that are not included in the nozzle group among the plurality of nozzles, to discharge ink onto the recording medium;
- a conveying unit configured to convey the recording medium in the predetermined direction, after the first recording, for a distance corresponding to a width of the nozzle group,
- wherein, in response to the conveying unit conveying the recording medium in the predetermined direction, the recording unit performs second recording to record a second dot pattern on the conveyed recording medium by driving the nozzle group to discharge ink onto the recording medium;
- an optical sensor configured to obtain a signal value of an image regarding the predetermined direction based on the first dot pattern and the second dot pattern;
- and
- a determining unit configured to determine, based on the obtained signal value, whether a discharge nozzle performing defective discharge exists among the nozzle group.
A non-transitory computer-readable storage medium storing a program to cause a recording apparatus to perform a method, wherein the recording apparatus performs recording with a recording head and includes a nozzle array having a plurality of nozzles for discharging ink arranged in a predetermined direction and performs reciprocating movement in a scanning direction crossing the predetermined direction, the method comprising:
- performing first recording for recording a first dot pattern on a recording medium by driving a nozzle group including a series of some nozzles, but not all of the nozzles, among the plurality of nozzles and without driving nozzles that are not included in the nozzle group among the plurality of nozzles, to discharge ink onto the recording medium;
- conveying the recording medium in the predetermined direction, after the first recording, for a distance corresponding to a width of the nozzle group;
- performing second recording for recording a second dot pattern on the conveyed recording medium by driving the nozzle group to discharge ink onto the recording medium;
- obtaining, using an optical sensor, a signal value of an image regarding the predetermined direction based on the first dot pattern and the second dot pattern;
- and
- determining, based on the obtained signal value, whether a discharge nozzle performing defective discharge exists among the nozzle group.
Dependencies are inferred from the claim text.