LIQUID EJECTING DEVICE, REFILL TIME MEASURING DEVICE, AND REFILL TIME MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a liquid ejection device that can make an ejection port and a flow passage become high density, and to provide a refill time measuring device and a refill time measuring method.;SOLUTION: A refill time measuring method includes: ejecting at a plurality of frequencies to measure ejection speed of a droplet; detecting ejection frequency where ejection speed becomes an extreme value from variation in ejection speed in a plurality of frequencies; and obtaining refill frequency from the ejection frequency.;SELECTED DRAWING: Figure 12;COPYRIGHT: (C)2017,JPO&INPIT