JP2008044275A5

JP2008044275A5 -

Info

Publication number: JP2008044275A5
Application number: JP2006223439A
Authority: JP
Filing date: 2006-08-18
Publication date: 2009-09-03

Claims

(A) printing a test pattern having a plurality of regions having different densities based on a plurality of command gradation values;
(B) measuring a concentration for each of the plurality of regions to obtain a measured value of the concentration;
(C) setting a target density for each of the intermediate density area and the highest density area;
(D) In order to set the correction value for the command gradation value corresponding to the intermediate density, the measurement to be referred to according to the magnitude relationship between the measured value corresponding to the intermediate density region and the target density Identifying value pairs,
(E) In order to set the correction value for the command gradation value corresponding to the highest density, the measurement to be referred to regardless of the magnitude relationship between the measured value corresponding to the highest density region and the target density Identifying value pairs,
(F) With reference to the specified set of measurement values, the correction value for the command gradation value corresponding to the intermediate density and the correction value for the command gradation value corresponding to the highest density are set. thing,
The (G) had a row,
In printing the test pattern,
The operation of ejecting ink toward the medium while moving the print head in the movement direction and the operation of conveying the medium in the conveyance direction intersecting with the movement direction are repeatedly performed.
In obtaining the concentration measurement value,
A correction value setting for measuring the density of the test pattern for each of a plurality of row regions arranged in the transport direction, and acquiring the measured value of the density corresponding to both the plurality of regions and the row regions. Method.

The correction value setting method according to claim 1,
In specifying the set of measurement values to be referred to in order to set a correction value for a command gradation value corresponding to the intermediate density,
When the measured value corresponding to the intermediate density region is larger than the target density, the set of measured values to be referred to is lower than the measured value corresponding to the intermediate density region and the intermediate density A set of the measurement values corresponding to the concentration area,
When the measured value corresponding to the intermediate density region is smaller than the target density, the set of measured values to be referred to is higher than the measured value corresponding to the intermediate density region and the intermediate density A correction value setting method in which a set of measurement values corresponding to a density region is used.

A correction value setting method according to claim 1 or 2 , wherein
In specifying the set of measurement values to be referred to in order to set the correction value for the command gradation value corresponding to the highest density,
A correction value setting method, wherein a set of the measurement values to be referred to is a set of the measurement value corresponding to the region of the highest density and the measurement value corresponding to a region of the density lower than the highest density.

A correction value setting method according to any one of claims 1 to 3 ,
In the setting of the correction value for the command gradation value corresponding to the intermediate density and the correction value for the command gradation value corresponding to the highest density,
A command tone value corresponding to the target density is obtained by referring to the specified set of measurement values and the corresponding command tone value, and the intermediate density is handled using the obtained command tone value. A correction value setting method for setting a correction value for a command gradation value to be performed and a correction value for the command gradation value corresponding to the highest density.

A correction value setting method according to any one of claims 1 to 4 ,
In setting the target density,
A correction value setting method of referring to the measurement values for a plurality of the row regions belonging to the region having the same density, and setting an average value of each of the referenced measurement values as the target density.

A correction value setting method according to any one of claims 1 to 5 ,
In printing the test pattern,
A print head having a nozzle group composed of a plurality of nozzles that eject the same type of ink, and having a plurality of print heads according to the type of ink that can eject the nozzle group while moving in the moving direction Causing the nozzle to eject ink toward the medium ;
Printing a test pattern in which a plurality of sub-patterns printed by different nozzle groups are arranged in the moving direction;
The sub-pattern is
An intermediate density area printed in the intermediate density and long in the transport direction, a maximum density area printed in the maximum density and long in the transport direction, and a minimum density area long in the transport direction printed in the minimum density; How to set the correction value.

(A) A scanner that measures the density of a test pattern printed on a printing apparatus that is a correction value setting target,
(A1) measuring the density for each of a plurality of regions having different densities based on a plurality of command gradation values included in the test pattern;
A scanner to do
(B) a controller,
(B1) obtaining a measured value of the density from the scanner;
(B2) setting a target density for each of the intermediate density area and the highest density area;
(B3) In order to set a correction value for the command gradation value corresponding to the intermediate density, the measured value to be referred to according to the magnitude relationship between the measured value corresponding to the intermediate density region and the target density Identifying a set of
(B4) In order to set a correction value for the command gradation value corresponding to the highest density, reference is made regardless of the magnitude relationship between the measured value corresponding to the area printed at the highest density and the target density. Identifying the set of said measurement values
(B5) Referring to the specified set of measurement values, a correction value for the command gradation value corresponding to the intermediate density and a correction value for the command gradation value corresponding to the highest density are set. thing,
A controller to perform
A correction value setting system having (C).