Title:
PATTERN COLOR TONE CONTROL METHOD AND CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2006/054521
Kind Code:
A1
Abstract:
In the pattern color tone control method and controller of a printer, a target color mixture mesh density is set for every ink supply unit width when a print pattern is divided by the ink supply unit width of ink supply devices (6, 7) in order to perform color tone control using an IRGB densitometer even when printing is carried out at a density exceeding a presumed maximum color space, and actual color mixture mesh density is measured using the IRGB densitometer (1) for every ink supply unit width of a regular print sheet obtained by printing. Each color mixture mesh density is converted into a dot area ratio using well-known extended Neugebauer formula where Yule Nielsen coefficient n is set to a value that makes the relation of dot area ratio with color mixture mesh density substantially linear. It is further converted into a monochromatic mesh density and a solid density deviation corresponding to the deviation between a target monochromatic mesh density and an actual monochromatic mesh density is determined using the Yule Nielsen formula, and then ink supply is regulated for every ink supply unit width depending on the solid density deviation.
Inventors:
OZAKI IKUO (JP)
TAKEMOTO SYUUICHI (JP)
TASAKA NORIFUMI (JP)
TAKEMOTO SYUUICHI (JP)
TASAKA NORIFUMI (JP)
Application Number:
PCT/JP2005/020848
Publication Date:
May 26, 2006
Filing Date:
November 14, 2005
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
OZAKI IKUO (JP)
TAKEMOTO SYUUICHI (JP)
TASAKA NORIFUMI (JP)
OZAKI IKUO (JP)
TAKEMOTO SYUUICHI (JP)
TASAKA NORIFUMI (JP)
International Classes:
B41F31/02; B41F33/00; B41F33/14; G01J3/46
Domestic Patent References:
| WO2003039134A1 | 2003-05-08 |
Foreign References:
| JP2004106523A | 2004-04-08 | |||
| JP2001277473A | 2001-10-09 |
Other References:
THE COLOR SCIENCE ASSOCIATION OF JAPAN: "Shinpen Shikisai Kagaku Handbook, 2nd edition", 10 June 1998, UNIVERSITY OF TOKYO PRESS, pages: 1170, XP002998062
See also references of EP 1815985A4
See also references of EP 1815985A4
Attorney, Agent or Firm:
Sanada, Tamotsu (10-31 Kichijoji-honcho 1-chome, Musashino-sh, Tokyo 04, JP)
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