Image forming apparatus and method for correction image density non-uniformity by reading a test pattern recorded by the apparatus

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United States of America Patent

PATENT NO 5189521
SERIAL NO

07711648

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Abstract

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There is disclosed an image forming apparatus for recording an original image read by a reading unit on a recording medium uses a recording head having an array of a plurality of recording elements. The apparatus includes pattern forming unit for forming, on the recording medium, a test pattern having an area larger than an array range of the plurality of recording elements using the recording head in accordance with a predetermined operation, a detection unit for causing the reading unit to read the test pattern formed on the recording medium by the pattern forming unit in accordance with a predetermined operation, and detecting a density distribution within the array range of the plurality of recording elements, a generation unit for generating correction data of a drive condition for uniforming a density during image formation on the basis of the density distribution detected by the detection unit in correspondence with the plurality of recording elements, and a guide unit for display the predetermined operations on a display unit.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHA A CORPORATION OF JAPAN30-2 3-CHOME SHIMOMARUKO OHTA-KU TOKYO

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ohtsubo, Toshihiko Yokohama, JP 8 111
Shouno, Seita Warabi, JP 1 49
Sugishima, Kiyohisa Yokohama, JP 26 544
Suzuki, Akio Yokohama, JP 254 3301
Takada, Yoshihiro Kawasaki, JP 99 2368
Takagi, Eiichi Yokohama, JP 18 378

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