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US 6,145,960 AGranted
Ink jet recording apparatus and ink jet recording method
AssigneeCanon Kabushiki Kaisha
InventorsHidehiko Kanda, Toshiharu Inui, Daigoro Kanematsu
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AssigneeCanon Kabushiki Kaisha
InventorsHidehiko Kanda, Toshiharu Inui, Daigoro Kanematsu
Estimating the term…
An ink jet recording apparatus which carries out, in a decimated multipass print mode, paper transfer by an extra amount (2.5 .mu.m) beyond a standard paper transfer amount corresponding to a quarter of the total number of nozzles in the nozzle arrangement of a recording head. This can displace dots formed in subsequent scannings from dots formed in previous scannings by amounts of 2.5 .mu.m, 5 .mu.m, 7.5 .mu.m and 10 .mu.m, and reduce the overlap of the dots at boundary regions in the decimated multipass print mode. In a one pass print mode, the paper transfer amount per scanning is set less than the sum total of the four paper transfer amounts of the decimated multipass print mode so that dot overlaps take place as countermeasures against paper transfer errors. This makes it possible to achieve high quality image recording by preventing both the white bandings at the boundary regions in the one pass print mode that prints one unit area by one scanning, and black bandings at boundary regions in the decimated multipass print mode that prints the one unit area by a plurality of scannings, thereby achieving high quality recording.
An ink jet recording apparatus which carries out recording using a recording head with a plurality of ink discharge orifices provided at predetermined intervals for recording on a recording medium, said ink jet recording apparatus comprising:
An ink jet recording method that records data on a unit area on a recording medium based on recording data by driving a recording head, during the time in which said recording head is being driven in the main scanning direction, said unit area on said recording medium corresponding to a plurality of ink discharge orifices provided at predetermined intervals in said recording head, said recording method comprising the steps of:
An ink jet recording method which carries out recording using a recording head with a plurality of ink discharge orifices provided at predetermined intervals for recording on a recording medium, said method comprising the steps of:
Dependencies are inferred from the claim text.