Claims
- 1. An electrostatic ink jet head that includes a plurality of electrostatic actuators, each of said plurality of electrostatic actuators comprising:a nozzle; an ink liquid chamber that communicates with the nozzle; a diaphragm; and an electrode that faces the diaphragm, with a predetermined space being maintained between the electrode and the diaphragm, wherein a voltage is applied between the electrode and the diaphragm so as to deform the diaphragm due to static electricity, ink droplets are discharged by a mechanical recovering force of the deformed diaphragm, the electrode and the diaphragm form a non-parallel gap, and when the voltage is applied, a period of time during which the diaphragm is in contact with the electrode is 20% or less of a period of time required for forming one pixel.
- 2. An electrostatic ink jet head that includes a plurality of electrostatic actuators, each of said plurality of electrostatic actuators comprising:a nozzle; an ink liquid chamber that communicates with the nozzle; a diaphragm; and an electrode that faces the diaphragm, with a predetermined space being maintained between the electrode and the diaphragm, wherein a voltage is applied between the electrode and the diaphragm so as to deform the diaphragm due to static electricity, ink droplets are discharged by a mechanical recovering force of the deformed diaphragm, the electrode and the diaphragm form a non-parallel gap, a relationship, V1/V=0.7, is satisfied, a volume of the gap chamber formed by a space closed or approximately closed by the diaphragm and the electrode being V, and a volume of a diaphragm chamber being V1, the diaphragm chamber being partially the gap chamber and a space just under the diaphragm, and when the voltage is applied, a period of time during which the diaphragm is in contact with the electrode is 20% or less of a period of time required for forming one pixel.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2000-095378 |
Mar 2000 |
JP |
|
Parent Case Info
This is a divisional of application Ser. No. 09/793,478 filed Feb. 26, 2001 now U.S. Pat. No. 6,511,158. Priority of application No. 2000-095378 filed in Japan on Mar. 30, 2000. Applicant hereby claims priority under 35 U.S.C. §119.
Foreign Referenced Citations (1)
Number |
Date |
Country |
7299908 |
Nov 1995 |
JP |