Liquid ejecting head, liquid ejecting head unit, and liquid ejecting apparatus

Patent metadata

Field	Value
Publication number	US-9682557-B2
Application number	US-201514921818-A
Country	US
Kind code	B2
Filing date	Oct 23, 2015
Priority date	Oct 31, 2014
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A liquid ejecting head includes a first nozzle row in which nozzles which eject a liquid are juxtaposed along a first direction, first drive elements which cause the liquid to be ejected from each nozzle of the first nozzle row, a plurality of first individual wirings which are connected to the first drive elements, a first common wiring which is connected in common to the first drive elements, a second nozzle row in which nozzles are juxtaposed along the first direction, second drive elements which cause the liquid to be ejected from each nozzle of the second nozzle row, a plurality of second individual wirings which are connected to the second drive elements, and a second common wiring which is connected in common to the second drive elements and is not connected to the first common wiring. The plurality of first individual wirings, the first common wiring, the second individual wirings, and the second common wiring are connected to a common flexible cable.

First claim

What is claimed is:

1. A liquid ejecting head, comprising:
a first nozzle row in which nozzles which eject a liquid are juxtaposed along a first direction;
first drive elements which cause the liquid to be ejected from each nozzle of the first nozzle row;
a plurality of first individual wirings which are connected to the first drive elements;
a first common wiring which is connected in common to the first drive elements;
a second nozzle row in which nozzles are juxtaposed along the first direction;
second drive elements which cause the liquid to be ejected from each nozzle of the second nozzle row;
a plurality of second individual wirings which are connected to the second drive elements; and
a second common wiring which is connected in common to the second drive elements and is not connected to the first common wiring,
wherein the first common wiring are arranged along a plane where the second common wiring are arranged, and
wherein the plurality of first individual wirings, the first common wiring, the second individual wirings, and the second common wiring are connected to a common flexible cable.

2. The liquid ejecting head according to claim 1 ,
wherein the flexible cable includes a first common connection wiring which is connected to the first common wiring, and a second common connection wiring which is connected to the second common wiring, and
wherein the first common connection wiring and the second common connection wiring are provided independently without being connected to each other on the flexible cable.

3. A liquid ejecting apparatus, comprising:
the liquid ejecting head according to claim 2 ,
an intermediate substrate which is connected to the flexible cable;
a holding member which holds the intermediate substrate; and
an outer wiring substrate, one end of which is connected to the intermediate substrate, the other end of which is connected to a control device,
wherein the intermediate substrate moves reciprocally relative to the control device,
wherein the outer wiring substrate follows the reciprocal movement of the intermediate substrate, and
wherein A*B*C*D≧0.007, where A (V/μsec) is a total of values obtained by dividing each potential difference (V) of charging or discharging of drive waveforms which drive the first drive elements and the second drive elements by a respective charging or discharging time (μsec), B(m) is a length of the outer wiring substrate, C(m 2 ) is a sectional area of the outer wiring substrate, and D(number) is a number of the first drive elements and the second drive elements which are driven.

4. A liquid ejecting head unit, comprising:
the liquid ejecting head according to claim 2 ;
an intermediate substrate which is connected to the flexible cable;
a holding member which holds the intermediate substrate; and
an outer wiring substrate which is connected to the intermediate substrate,
wherein the flexible cable includes a first common connection wiring which is connected to the first common wiring, and a second common connection wiring which is connected to the second common wiring,
wherein the first common connection wiring and the second common connection wiring are provided independently without being connected to each other on the flexible cable,
wherein the intermediate substrate includes a first common intermediate wiring which is connected to the first common connection wiring, and a second common intermediate wiring which is connected to the second common connection wiring,
wherein the first common intermediate wiring and the second common intermediate wiring are provided independently without being connected to each other on the intermediate substrate,
wherein the outer wiring substrate includes a first common outer wiring which is connected to the first common intermediate wiring, and a second common outer wiring which is connected to the second common intermediate wiring, and
wherein the first common outer wiring and the second common outer wiring are provided independently without being connected to each other on the outer wiring substrate.

5. The liquid ejecting head according to claim 1 ,
wherein the first common wiring and the second common wiring each has a plurality of connection regions which are connected to the common flexible cable,
wherein a plurality of the first common wirings are disposed on one side in the first direction in relation to the plurality of first individual wirings and the plurality of second individual wirings, and
wherein a plurality of the second common wirings are disposed on another side in the first direction in relation to the plurality of first individual wirings and the plurality of second individual wirings.

6. A liquid ejecting apparatus, comprising:
the liquid ejecting head according to claim 5 ,
an intermediate substrate which is connected to the flexible cable;
a holding member which holds the intermediate substrate; and
an outer wiring substrate, one end of which is connected to the intermediate substrate, the other end of which is connected to a control device,
wherein the intermediate substrate moves reciprocally relative to the control device,
wherein the outer wiring substrate follows the reciprocal movement of the intermediate substrate, and
wherein A*B*C*D≧0.007, where A (V/μsec) is a total of values obtained by dividing each potential difference (V) of charging or discharging of drive waveforms which drive the first drive elements and the second drive elements by a respective charging or discharging time (μsec), B(m) is a length of the outer wiring substrate, C(m 2 ) is a sectional area of the outer wiring substrate, and D(number) is a number of the first drive elements and the second drive elements which are driven.

7. A liquid ejecting head unit, comprising:
the liquid ejecting head according to claim 5 ;
an intermediate substrate which is connected to the flexible cable;
a holding member which holds the intermediate substrate; and
an outer wiring substrate which is connected to the intermediate substrate,
wherein the flexible cable includes a first common connection wiring which is connected to the first common wiring, and a second common connection wiring which is connected to the second common wiring,
wherein the first common connection wiring and the second common connection wiring are provided independently without being connected to each other on the flexible cable,
wherein the intermediate substrate includes a first common intermediate wiring which is connected to the first common connection wiring, and a second common intermediate wiring which is connected to the second common connection wiring,
wherein the first common intermediate wiring and the second common intermediate wiring are provided independently without being connected to each other on the intermediate substrate,
wherein the outer wiring substrate includes a first common outer wiring which is connected to the first common intermediate wiring, and a second common outer wiring which is connected to the second common intermediate wiring, and
wherein the first common outer wiring and the second common outer wiring are provided independently without being connected to each other on the outer wiring substrate.

8. The liquid ejecting head according to claim 1 ,
wherein the first common wiring and the second common wiring each has a plurality of connection regions which are connected to the common flexible cable,
wherein a plurality of the first common wirings are disposed on both one side and another side in the first direction in relation to the plurality of first individual wirings and the plurality of second individual wirings, and
wherein a plurality of the second common wirings are disposed on both the one

Assignees

• Seiko Epson Corp

Inventors

• Owaki Hiroshige

Classifications

• B41J2202/18

  Electrical connection established using vias · CPC title

• B41J2002/14241

  having a cover around the piezoelectric thin film element · CPC title

• B41J2002/14491

  Electrical connection · CPC title

• B41J2/14233 Primary

  of film type, deformed by bending and disposed on a diaphragm · CPC title