US 10,864,720 B2Granted

Drive circuit and liquid ejecting apparatus

AssigneeSeiko Epson Corporation

InventorsHidehiko Yajima, Tetsuo Takagi

Life of this patent

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Abstract

There is a provided a drive circuit in which a first drive signal output circuit includes a first control circuit that controls an output of a first drive signal, and a first abnormality detection circuit that detects an abnormality in a first drive signal output circuit, a second drive signal output circuit includes a second control circuit that controls an output of a second drive signal, and a second abnormality detection circuit that detects an abnormality in a second drive signal output circuit, the first drive signal output circuit transmits an occurrence of abnormality to the second drive signal output circuit, when the first abnormality detection circuit detects the abnormality, and the second drive signal output circuit transmits an occurrence of abnormality to the first drive signal output circuit, when the second abnormality detection circuit detects the abnormality.

Claims8

Dependent claims

A drive circuit comprising:

a first drive signal output circuit that outputs a first drive signal for driving a first piezoelectric element;
and
a second drive signal output circuit that outputs a second drive signal for driving a second piezoelectric element, wherein
the first drive signal output circuit includes
a first control circuit that controls an output of the first drive signal, and
a first abnormality detection circuit that detects an abnormality in the first drive signal output circuit,
the second drive signal output circuit includes
a second control circuit that controls an output of the second drive signal, and
a second abnormality detection circuit that detects an abnormality in the second drive signal output circuit,
the first drive signal output circuit transmits an occurrence of abnormality to the second drive signal output circuit, when the first abnormality detection circuit detects the abnormality, and
the second drive signal output circuit transmits an occurrence of abnormality to the first drive signal output circuit, when the second abnormality detection circuit detects the abnormality.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/751,252Filed 24 Jan 2020
Priority: JP 2019-01096225 Jan 2019
Published: US 2020/0238688 A130 Jul 2020
Granted: 15 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B41J 2/04541
Control methods or devices therefor, e.g. driver circuits, control circuits: specific driving circuit
B41J 2/0451
Control methods or devices therefor, e.g. driver circuits, control circuits: for detecting failure, e.g. clogging, malfunctioning actuator
B41J 2/0452
Control methods or devices therefor, e.g. driver circuits, control circuits: reducing demand in current or voltage
B41J 2/04581
Control methods or devices therefor, e.g. driver circuits, control circuits: controlling heads based on piezoelectric elements

Family

US 2020/0238688 A1Pre-grant publication · published 30 Jul 2020
US 10,864,720 B2This patent

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

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