Fluid ejection device, driving method of fluid ejection device, and operating instrument
First Claim
1. A fluid ejection device comprising:
- a fluid chamber whose capacity is variable;
an inlet flow path and an outlet flow path communicating with the fluid chamber;
a capacity changing unit which changes the capacity of the fluid chamber, the capacity changing unit including a piezoelectric element;
a fluid supplying unit which supplies fluid to the inlet flow path;
a nozzle including a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber;
a vibrating unit which vibrates a component in the vicinity of the fluid ejection opening;
a vibration detecting unit including a sensor which detects the level of vibration of the nozzle in the vicinity of the fluid ejection opening; and
an operation control unit which supplies drive signals that control operation of the capacity changing unit based on the level of the vibration detected by the vibration detecting unit, the drive signals causing the piezoelectric element to expand or contract to change the capacity of the fluid chamber.
2 Assignments
0 Petitions
Accused Products
Abstract
A fluid ejection device includes: a fluid chamber whose capacity is variable; an inlet flow path and an outlet flow path communicating with the fluid chamber; a capacity changing unit which changes the capacity of the fluid chamber; a fluid supplying unit which supplies fluid to the inlet flow path; a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber; a vibrating unit which vibrates a component in the vicinity of the fluid ejection opening; a vibration detecting unit which detects the level of vibration of the component in the vicinity of the fluid ejection opening; and an operation control unit which controls operation of the capacity changing unit based on the level of the vibration detected by the vibration detecting unit.
9 Citations
15 Claims
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1. A fluid ejection device comprising:
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a fluid chamber whose capacity is variable; an inlet flow path and an outlet flow path communicating with the fluid chamber; a capacity changing unit which changes the capacity of the fluid chamber, the capacity changing unit including a piezoelectric element; a fluid supplying unit which supplies fluid to the inlet flow path; a nozzle including a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber; a vibrating unit which vibrates a component in the vicinity of the fluid ejection opening; a vibration detecting unit including a sensor which detects the level of vibration of the nozzle in the vicinity of the fluid ejection opening; and an operation control unit which supplies drive signals that control operation of the capacity changing unit based on the level of the vibration detected by the vibration detecting unit, the drive signals causing the piezoelectric element to expand or contract to change the capacity of the fluid chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A driving method of a fluid ejection device comprising:
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the fluid ejection device including; a fluid chamber whose capacity is variable, an inlet flow path and an outlet flow path communicating with the fluid chamber, a capacity changing unit which changes the capacity of the fluid chamber, the capacity changing unit including a piezoelectric element, a fluid supplying unit which supplies fluid to the inlet flow path, a nozzle including a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber, a vibrating unit, a vibration detecting unit including a sensor, and an operation control unit; the method comprising; vibrating a component in the vicinity of the fluid ejection opening by the vibrating unit; detecting the level of vibration of the nozzle in the vicinity of the fluid ejection opening by the vibration detecting unit; and supplying drive signals that control operation of the capacity changing unit based on the level of the vibration detected in the vibration detecting step by the operation control unit, the drive signals causing the piezoelectric element to expand or contract to change the capacity of the fluid chamber.
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Specification