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Ink-jet printing method

A technology of inkjet printing and test printing, applied in printing, copying/marking methods, printing devices, etc., can solve the problems of deceleration and ink flying speed, etc., and achieve the effect of high-precision printing

Active Publication Date: 2018-08-14
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The prior art does not consider the deceleration of the flying speed of the ink when the thickness of the printing object changes

Method used

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  • Ink-jet printing method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0065] In inkjet printing, a position shift occurs in which the landing position of the ink landed on the printing target deviates from the position of the target. This positional shift is corrected in the following steps. That is, correction is performed through a distance measurement step, a flying speed angle measurement step, a test printing step, and an actual printing step. use figure 1 side view for illustration.

[0066] It should be noted that the "step" in the following description may also be provided in the inkjet device as a predetermined control chip. Alternatively, the "process" may be a program executed by a processor and a memory included in the inkjet device. Alternatively, the "process" may be a program executed by another computer that controls the inkjet device. Therefore, a "step" may also be expressed as a "part".

[0067]

[0068] In the distance measuring step, the thickness of the actual printing object 105 as a product is measured by the thick...

no. 2 approach

[0157] (angle measurement)

[0158] Figure 4 A side view at the time of inkjet ejection related to the second embodiment is shown.

[0159] As described in the first embodiment, there is a method of calculating the flying angle of the ink by capturing the flying image of the ink with the camera. However, this method requires time for measuring a large number of nozzles 102 , and it is necessary to install a camera and lighting in the printing press for capturing images of flying ink. In contrast, the flying angle of the ink is calculated from the measurement of the landing position. Thereby, reduction of equipment cost and improvement of production rhythm are realized. It will be explained below.

[0160] Using a movable table or a printing object having a different thickness, the distance from the surface of the nozzle 102 of the inkjet head 101 to the printing object is changed, and the spraying is performed with the stage stopped. By substituting the obtained landing ...

no. 3 approach

[0170] (speed measurement)

[0171] Figure 6 A side view at the time of inkjet discharge related to the third embodiment is shown.

[0172] As described in the first embodiment, there is a method of calculating the flying angle of the ink by capturing the flying image of the ink with the camera. However, this method requires time for measuring many nozzles 102, and it is necessary to install a camera and lighting in the printing press for capturing images of flying ink. On the other hand, the flying velocity of the ink is calculated from the measurement of the landing position. Thereby, reduction of equipment cost and improvement of production rhythm are realized. It will be explained below.

[0173] In the printing object 301 at a low speed v s1 In the case of movement, the ink jet lands on the ink jet landing position 305 . Position offset Δx 1 is the distance between the ink landing position 305 when the printing object is at a low speed and the ink landing position...

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Abstract

A high precision printing method taking into consideration the variance in the thickness of a printing target. An ink-jet printing method comprises the steps: measuring a distance between a printing target and at least one nozzle; measuring a flying speed and a flying angle of ink discharged from the at least one nozzle; printing a test substrate with ink to identify a location on which ink is spotted, and calculating a thickness-related displacement that is a displacement from the location on which the ink is spotted, based on a thickness difference between the printing target and the test substrate from results, and the flying speed and the flying angle of the ink; and discharging ink from the at least one nozzle to achieve actual printing of the printing target with the ink while correcting the thickness-related displacement.

Description

technical field [0001] The present invention relates to inkjet printing methods. Background technique [0002] A drop-on-demand type inkjet head (hereinafter sometimes referred to as a "head") is capable of applying a required amount of ink when necessary in accordance with an input signal. The technology of inkjet is also expected as a manufacturing technology of electronic devices such as organic EL displays and liquid crystal panels (for example, Patent Document 1). [0003] In the inkjet device, the deviation of the landing position of the ink during printing has a great influence on the printing quality. The deviation of the landing position is due to the position deviation of the printing object, the position deviation of the nozzle, the deviation of the flying speed of ink for each nozzle, the ejection angle of each nozzle, and the position deviation of the head during reciprocating printing. , The distance between the printing object and the head changes. [0004]...

Claims

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Application Information

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IPC IPC(8): B41M5/00B41J2/07
CPCB41J2/07B41M5/00B41J2/04503B41J2/04556B41J2/04586B41J2/2135B41J11/0035B41J11/0095B41J19/145B41J2/04526B41J2202/01B41J2/135B41J29/393
Inventor 熊泽谦太郎中谷修平南云孝夫井上隆史大塚巨
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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