| 摘要 |
The liquid ejection head has an ejection unit which includes: a nozzle ejecting a droplet of liquid; a pressure chamber connected to the nozzle; a displacement generating device which changes a volume of the pressure chamber; and a supply flow channel which is connected to the pressure chamber and supplies the liquid to the pressure chamber, wherein a resonance frequency f (kHz) of the ejection unit and an ejection speed v (m/s) of the droplet ejected by the nozzle satisfy a following relationship: f>31xv+80.
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