US 2016/0355015 A1Published application

Liquid ejecting apparatus

AssigneeSeiko Epson Corporation

InventorsToru KASHIMURA, Hiroshi SUGITA

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Abstract

A liquid ejecting apparatus includes a signal modulation section that causes an original drive signal to be pulse-modulated to generate a modulation signal, a signal amplification section that amplifies the modulation signal to generate an amplification modulation signal, a coil that smooths the amplification modulation signal to generate a drive signal, a piezoelectric element that deforms when the drive signal is applied thereto, a cavity that expands or contracts due to deformation of the piezoelectric element, and a nozzle that communicates with the cavity and ejects a liquid in accordance with increase and decrease of a pressure inside the cavity. The coil is a metallic alloy type.

Claims5

Dependent claims

A liquid ejecting apparatus comprising:

a signal modulator that modulates a first drive signal to generate a modulation signal;
a signal amplifier that amplifies the modulation signal to generate an amplified modulation signal;
a coil that smoothes the amplified modulation signal to generate a second drive signal;
a piezoelectric element that deforms when the second drive signal is applied thereto;
a cavity that expands or contracts due to deformation of the piezoelectric element;
and
a nozzle that communicates with the cavity and ejects a liquid in accordance with increase and decrease of a pressure inside the cavity;
wherein the coil includes magnetic particles, and
wherein a product of a frequency of the amplified modulation signal measured in kHz and a size of a largest one of the magnetic particles measured in μm is equal to or less than 15,000.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/241,428Filed 19 Aug 2016
Priority: JP 2013-24499327 Nov 2013
Published: 8 Dec 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B41J 2/14201
Structure thereof only for on-demand ink jet heads: structure of print heads with piezoelectric elements
B41J 2/04541
Control methods or devices therefor, e.g. driver circuits, control circuits: specific driving circuit
B41J 2/04581
Control methods or devices therefor, e.g. driver circuits, control circuits: controlling heads based on piezoelectric elements
B41J 2/04593
Control methods or devices therefor, e.g. driver circuits, control circuits: dot-size modulation by changing the size of the drop

Family

Application14/520,680Division · filed 22 Oct 2014
Application15/241,428Division
US 2015/0145911 A1Published application
US 2016/0355015 A1This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

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