LIQUID EJECTING APPARATUS

• US 20120212531A1
• Filed: 02/22/2012
• Published: 08/23/2012
• Est. Priority Date: 02/23/2011
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Yamada, Yoichi, Kobashi, Masaru, Okada, Toshiya
• Granted Patent: US 8,632,164 B2
• Time in Patent Office: Days
• US Class Current: 347/10
• CPC Class Codes: B41J 2/14072 Electrical connections, e.g. details on electrodes, connecting the chip to the outside...

Abstract

A liquid ejecting apparatus includes a platen disposed with a gap from a nozzle plate of a recording head and supporting a recording medium in ejecting, and an platen application voltage generating unit generating an electric field having a direction different from an electric field generated between an individual external electrode of a piezoelectric vibrator and nozzles, between the nozzle plate and the platen, in which the intensity of the electric field generated by the applied-to-plate voltage generating unit is set in between the maximum electric field intensity and the minimum electric field intensity between the individual external electrode and the nozzles.

Claims

1. A liquid ejecting apparatus comprising:

a liquid ejecting head that has a nozzle formation surface where nozzles ejecting liquid are formed and a pressure generating unit driven by an applied driving signal and generating a pressure change in a liquid in a pressure chamber communicating with the nozzles, and ejects the liquid toward a landing target from the nozzle by driving the pressure generating unit;

a driving signal generating unit that generates a driving signal for driving the pressure generating unit;

a support unit that is disposed with a gap from the nozzle formation surface of the liquid ejecting head and supports the landing target in ejecting; and

an electric field generating unit that generates an electric field having a different direction from an electric field generated between the nozzles and a driving electrode of the pressure generating unit where the driving signal is supplied, between the nozzle formation surface and the support unit,

wherein the intensity of the electric field generated by the electric field generating unit is set in between the maximum electric field intensity and the minimum electric field intensity between the driving electrode and the nozzles.

2. The liquid ejecting apparatus according to claim 1,

wherein at least a portion of the support unit has a conductive member and the nozzle formation surface is grounded, and

the electric field generating unit charges the support unit with the same polarity as the driving electrode when the pressure generating unit is driven, by applying a voltage to the support unit.

3. The liquid ejecting apparatus according to claim 1,

wherein the nozzle formation surface has a conductive member and support unit is grounded, and

the electric field generating unit charges the nozzle formation surface with a polarity opposite to the driving electrode when the pressure generating unit is driven, by applying a voltage to the nozzle formation surface.