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Inkjet head driving device and inkjet head driving method

A technology of driving device and driving method, applied in the direction of inking device, printing, etc., which can solve the problems of printing speed drop, dot frequency drop, etc.

Active Publication Date: 2019-07-16
TOSHIBA TEC KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, however, since the dot frequency drops, the printing speed also drops

Method used

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  • Inkjet head driving device and inkjet head driving method
  • Inkjet head driving device and inkjet head driving method
  • Inkjet head driving device and inkjet head driving method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0038] figure 1 It is a perspective view of the inkjet head 1 . The inkjet head 1 is used in an inkjet recording device including the inkjet head driving device of this embodiment. The inkjet recording device refers to an inkjet type printer.

[0039] The inkjet head 1 includes nozzles 2 , a head substrate 3 , a drive circuit 4 , and a manifold 5 . The manifold 5 has an ink supply port 6 and an ink discharge port 7 .

[0040] The nozzle 2 is a member that ejects ink. The nozzle 2 is provided on the head substrate 3 . The drive circuit 4 is a drive signal output unit for outputting drive signals for ejecting ink droplets from the nozzles 2 . The drive circuit 4 is, for example, a driver IC. The ink supply port 6 is a supply port for supplying ink to the nozzle 2 . In addition, the ink discharge port 7 is a discharge port of ink. The nozzle 2 ejects ink droplets supplied from the ink supply port 6 in accordance with a drive signal given from the drive circuit 4 . Ink no...

Embodiment approach 2

[0081] In Embodiment 1, the pulse width dp of each discharge pulse of the second discharge pulse group G2 is the same as the pulse width (=AL) of the discharge pulse of the first discharge pulse group G1. However, the pulse width dp does not have to be the same as the pulse width AL. Next, an inkjet recording device according to Embodiment 2 will be described. It should be noted that since the mechanical structure of the inkjet recording apparatus is the same as that of Embodiment 1, description thereof will be omitted.

[0082] Figure 10 (a) to (c) are drive waveform examples of drive signals that change the pulse width of each discharge pulse of the second discharge pulse group G2 according to the number of continuously discharged droplets. Figure 10 (a) is the drive waveform 52-7 when seven droplets are continuously discharged. Figure 10 (b) is the driving waveform 52-4 when 4 droplets are continuously discharged. Figure 10 (c) is the drive waveform 52-2 when two dr...

Embodiment approach 3

[0090] In Embodiments 1 and 2, the pulse width cp of the cancel pulse is larger than the pulse width AL of the first discharge pulse group G1. However, this pulse width cp may be smaller than the pulse width AL of the discharge pulse of the first discharge pulse group G1. Next, an inkjet recording device according to Embodiment 3 will be described. It should be noted that since the mechanical configuration of the inkjet recording apparatus is the same as that of Embodiments 1 and 2, description thereof will be omitted.

[0091] Figure 12 (a)~(c) are in Figure 10 An example of a driving waveform when the pulse width cp of the cancel pulse is reduced among the respective driving waveforms of (a) to (c). Figure 12 (a) is the drive waveform 53-7 when seven droplets are continuously discharged. Figure 12 (b) is the driving waveform 53-4 when 4 droplets are continuously discharged. Figure 12 (c) is the drive waveform 53-2 when two droplets are continuously discharged. Ill...

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PUM

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Abstract

An object of the present invention is to provide an inkjet head driving device and an inkjet head driving method having a high printing speed. The inkjet head driving device of the embodiment includes: a pressure chamber containing liquid; an actuator that expands or contracts the volume of the pressure chamber based on a driving signal; a driving signal output unit that outputs a driving signal to the actuator; and a nozzle that communicates with the The pressure chambers are connected, and the liquid is ejected according to the volume change of the pressure chambers. The drive signal includes a signal of a drive waveform in which the number of repetitions of the ejection pulse is 3 or more. When the number of repetitions of the discharge pulse is three or more, the drive waveform of the drive signal is composed of the first discharge pulse group and the second discharge pulse group subsequent to the first discharge pulse group. The first ejection pulse group consists of a plurality of ejection pulses with a first voltage amplitude, and the second ejection pulse group consists of one or more ejection pulses with a second voltage amplitude smaller than the first voltage amplitude.

Description

technical field [0001] Embodiments of the present invention relate to an inkjet head driving device and an inkjet head driving method. Background technique [0002] The multi-dot type inkjet head driving device adjusts the droplet volume by ejecting ink droplets multiple times per dot. This type of drive device includes a drive circuit that controls the ejection of liquid droplets. The drive circuit controls the ejection of liquid droplets by outputting a high-frequency drive signal to the actuator provided in the inkjet head. [0003] The drive signal is a high-frequency signal. Since the drive circuit repeatedly outputs high-frequency signals, it tends to become high in temperature. In order to suppress the temperature rise of the drive circuit, it is only necessary to add a waiting time for the drive circuit to dissipate heat between the discharge of one droplet and the discharge of the next droplet. In this case, however, since the dot frequency decreases, the printi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/045
CPCB41J2/04501B41J2/04541B41J2/04581B41J2/04588B41J2/04595B41J2/14209B41J2002/14491B41J2202/12B41J2/04586
Inventor 喜地保仁
Owner TOSHIBA TEC KK