Inkjet recording device, inkjet head driving method, and driving waveform design method
A technology for inkjet recording and driving waveforms, which is applied in the direction of inking devices, printing, etc., and can solve the problems of undisclosed robustness and other issues
Active Publication Date: 2020-05-29
KONICA MINOLTA INC
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Problems solved by technology
[0019] In addition, although Patent Document 3 discloses aligning the phases of the pressure wave vibrations generated in each segment of the driving waveform, it does not disclose a multi-point method that is robust to the AL value in discharging fine droplets of 20 μm or less. driving waveform
Method used
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Embodiment Construction
[0090] Embodiments of the present invention will be described below using the drawings.
[0091] (Inkjet recording device)
[0092] figure 1 It is a schematic configuration diagram showing an embodiment of the inkjet recording device according to the present invention.
[0093] In the inkjet recording device 1, the conveying mechanism 2 clamps the recording medium 7 made of paper, plastic sheet, cloth, etc. by the conveying roller pair 22, and moves to the Y direction in the figure by the rotation of the conveying roller 21 utilizing the conveying motor 23. (sub-scanning direction) for conveyance. An inkjet head (hereinafter, simply referred to as a head) 3 is provided between the conveying roller 21 and the conveying roller pair 22 . The head 3 is attached to the carriage 5 so that the nozzle surface side faces the recording surface 71 of the recording medium 7 , and is electrically connected to the drive control unit 8 via the flexible cable 6 .
[0094] In the present ...
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The object of the present invention is to be able to drive the head in a multi-dot method with a drive waveform that is relatively robust to the AL value and to form a high-quality image. Multiple driving pulses, the driving pulse used to discharge the first droplet changes the volume of the pressure chamber to excite more than two overlapping pressure waves in the pressure chamber, and when the first droplet is discharged, the pressure in the pressure chamber The excited pressure wave vibration has a phase shift of -0.6AL or more and 0.6AL or less from the pressure wave vibration excited in the pressure chamber by its previous action, and the driving pulse for subsequent discharge of the second droplet changes the volume of the pressure chamber. Two or more overlapping pressure waves are excited in the pressure chamber, and the pressure wave vibration excited in the pressure chamber at the time of discharge of the second droplet is the same as the pressure wave vibration excited in the pressure chamber by its previous action and due to the first droplet The synthetic vibration of the reverberant pressure wave vibration remaining in the pressure chamber after the first droplet is discharged has a phase shift in the opposite direction to the phase shift when the first droplet is discharged.
Description
technical field [0001] The present invention relates to an inkjet recording device, a method for driving an inkjet head, and a method for designing a driving waveform. Specifically, it relates to an inkjet head capable of driving an inkjet head in a multi-dot manner with a driving waveform that is relatively robust to an AL value. An inkjet recording apparatus for forming high-quality images, a method of driving an inkjet head, and a method of designing a driving waveform. Background technique [0002] In recent years, in order to form an inkjet image with excellent gradation, it is increasingly necessary to dispense multiple dots of liquid droplets of different liquid volumes from one inkjet head. [0003] As a method of separating droplets of different liquid amounts from the same nozzle, it is known to continuously discharge a plurality of droplets from the same nozzle by repeatedly applying the same drive pulse within one pixel period, and make the droplets land on the r...
Claims
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IPC IPC(8): B41J2/015B41J2/045B41J2/14B41J2/205
CPCB41J2/205B41J2/04581B41J2/04588B41J2/04593B41J2/04595B41J2202/10B41J2202/06
Inventor 下村章人小林谅平木泽亚纪子
Owner KONICA MINOLTA INC