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Patent Searching and Data


Title:
RECORDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/141520
Kind Code:
A1
Abstract:
In the conventional technique, image quality defects occur when ink cannot be discharged in the same position for outward and return strokes when ink is discharged to a recording medium by outward and return strokes of a carriage in an inkjet printer. In the conventional technique, a test pattern using offset discharge timings is recorded on a recording medium, and an appropriate timing is input as a correction value. Conventional techniques that automatically read a test pattern are also known, but the precision thereof is poor because the test pattern is recorded without taking into account the state of a head. Therefore, in the present invention, a test pattern having a long period and a test pattern having a short period are recorded, and the density of the test patterns is read by a sensor. A candidate for an extreme value is calculated from the test pattern having a long period, and a rough adjustment is first performed. Then, in a range around the extreme value, an extreme value from the test pattern having a short period is calculated. An extreme value corresponding to a period belonging to both extreme values is used as a correction value. By fixing a discharge timing for the recording head using this correction value, an image can be recorded in which dot offset between outward and return strokes is suppressed.

Inventors:
AOI YOSHIHISA (JP)
Application Number:
PCT/JP2013/078653
Publication Date:
September 18, 2014
Filing Date:
October 23, 2013
Export Citation:
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Assignee:
SEIKO I INFOTECH INC (JP)
International Classes:
B41J2/01
Foreign References:
JP2010052438A2010-03-11
JP2012011664A2012-01-19
JPH11286142A1999-10-19
JP2007030254A2007-02-08
JP2005104147A2005-04-21
JP2000241242A2000-09-08
JP2010017872A2010-01-28
JP2012153021A2012-08-16
Other References:
See also references of EP 2933108A4
Attorney, Agent or Firm:
KUHARA, Kentaro et al. (JP)
Kentaro Kuhara (JP)
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