METHOD AND APPARATUS FOR DETECTING RESONANCE CONDITIONS OF DROPLET EJECTION HEAD

PROBLEM TO BE SOLVED: To reduce time for detecting resonance conditions of a droplet ejection head.SOLUTION: A method for detecting resonance conditions of a droplet ejection head that discharges functional liquid from a nozzle in communication with a pressure chamber by resonating the functional li...

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Bibliographische Detailangaben
Hauptverfasser:	TAKADA EMI, MASUO JUNICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To reduce time for detecting resonance conditions of a droplet ejection head.SOLUTION: A method for detecting resonance conditions of a droplet ejection head that discharges functional liquid from a nozzle in communication with a pressure chamber by resonating the functional liquid in the pressure chamber by giving a periodic external force to the pressure chamber in which the functional liquid is contained includes: an oscillation generating step of generating free oscillation of the functional liquid on a liquid surface at a discharge port of the nozzle without discharging the functional liquid from the nozzle by giving an instant external force to the pressure chamber in which the functional liquid is contained; and a frequency detecting step of detecting frequency of the free oscillation as frequency of the periodic external force based on a temporal response of a position on the liquid surface of the functional liquid that freely oscillates.