Correction data setting apparatus and inkjet head

Patent metadata

Field	Value
Publication number	US-10065415-B2
Application number	US-201815877448-A
Country	US
Kind code	B2
Filing date	Jan 23, 2018
Priority date	Jan 15, 2016
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A first output section outputs a first parameter calculated for each nozzle in a group obtained by dividing the nozzles into groups for each certain number so that density unevenness of ink ejected from each nozzle in the group is corrected. A second output section outputs a second parameter calculated for each group so that change rate of the density unevenness between groups is corrected. A first register circuit divides first parameters for each nozzle in the group and stores the first parameters. A second register circuit divides second parameters for each group and stores the second parameters. A multiplication section sequentially multiplies the first parameters by the second parameters. A conversion section converts a multiplication value to correction data of each nozzle. A setting section sets the correction data in a memory.

First claim

What is claimed is:

1. A printer comprising:
an inkjet head comprising an ejection section comprising a plurality of nozzles for ejecting ink, and a plurality of drive signal generation sections configured to generate drive pulse signals applied to a plurality of actuators;
a memory storing correction data of each nozzle; and
a controller adjusting the drive pulse signal according to the correction data;
wherein
the correction data is calculated depending on a multiplication value of a first parameter which is calculated for correcting a density unevenness of the ink ejected from each nozzle in a group and a second parameter which is calculated for correcting differences in a change rate of the density unevenness between the groups for each group.

2. The printer according to claim 1 , further comprising:
a correction data setting section, which comprises a first parameter setting section configured to set the first parameter and a second parameter setting section configured to set the second parameter, configured to calculate an adjusted value of the drive pulse signal and supply the adjusted value to a correction data input section of the drive signal generation section, wherein
each of a plurality of the drive signal generation sections comprises a correction data input section for receiving the adjusted value of the drive pulse signal, respectively.

3. The printer according to claim 1 , wherein the actuators comprise piezoelectric members.

4. A printer comprising:
an inkjet head comprising an ejection section comprising a plurality of nozzles for ejecting ink, and a plurality of drive signal generation sections configured to generate drive pulse signals applied to a plurality of actuators;
a memory storing correction data of each nozzle; and
a controller adjusting the drive pulse signal according to the correction data;
wherein
the correction data is calculated depending on an added value of a third parameter calculated for compensating an increase or a decrease in an ink density occurring between groups of nozzles and a multiplication value calculated according to a first parameter which is calculated for compensating a density unevenness of the ink ejected from each nozzle in a group and a second parameter which is calculated for compensating a difference in a change rate of the density unevenness between the groups for each group.

5. The printer according to claim 4 , wherein the actuators comprise piezoelectric members.

Assignees

• Toshiba Tec Kk

Inventors

• Nitta Noboru
• Hiyoshi Teruyuki
• Ono Shunichi

Classifications

• B41J2/04541

  Specific driving circuit · CPC title

• B41J2/04545

  Dynamic block driving · CPC title

• B41J2/04591

  Width of the driving signal being adjusted · CPC title

• B41J2/04535

  involving calculation of drop size, weight or volume · CPC title

• B41J2/04508 Primary

  aiming at correcting other parameters · CPC title