Liquid discharging apparatus and control method of liquid discharging apparatus

Abstract

The invention provides a liquid discharging apparatus and a control method of liquid discharging apparatus. A contraction portion (3) of a vibration pulse (DPC) includes a first contraction element (p31) which occurs subsequent to an expansion portion (p1), a contraction maintaining element (p32) which follows the first contraction element (p31), and a second contraction element (p33) which follows the contraction maintaining element (p32), and when a time from a start point time of the expansion portion (p1) to an end point time of the expansion portion (p1) is set as t1, a time from the end point time of the expansion portion (p1) to a start point time of the contraction portion (p3) is set as t2, and a natural vibration period of ink in an ink flow path including a pressure chamber is set as Tc, the start point time (t1+t2) of the contraction portion is set to be in the range of any one of the following expressions (1) and (2): (t1+t2)<t1 / 2+3Tc / 8 (1), (t1+t2)>t1 / 2+5Tc / 8 (2)..

Description

[0001] This application claims priority from Japanese Patent Application No. 2010-42598 filed on February 26, 2010, which is hereby incorporated by reference. technical field [0002] The present invention relates to a liquid ejection device such as an inkjet printer and a control method for the liquid ejection device. Background technique [0003] As a liquid ejection device, there is a device configured to generate a drive signal including a drive pulse (discharge pulse) by applying (supplying) the generated drive pulse to a pressure generating element (for example, a piezoelectric vibrator or a heating element, etc.). The pressure generating element is driven to cause pressure fluctuations in the liquid in the pressure generating chamber (a type of pressure chamber), and the pressure fluctuation is used to discharge the liquid from a nozzle opening communicating with the pressure generating chamber. And, in the liquid ejecting apparatus configured to generate a plurality ...

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Problems solved by technology

Therefore, it is conceivable to provide the pressure generating element with a micro-vibration waveform that only increases the amount of voltage change. The residual vibration of the liquid surface is added to the pressure fluctuation caused by the discharge element that occurs later, and the vibration of the meniscus is amplified, which may cause ink to be discharged from the nozzle opening by mistake.

In addition, in order to prevent the above-mentioned erroneous discharge, it is also conceivable to extend the time width of the discharge element that supplies the micro-vibration pulse, but since the overall waveform length of the micro-vibration pulse becomes longer, there is a possibility that high-frequency driving cannot be performed or the degree of freedom in waveform design is reduced. The problem

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