Discharge element substrate, printhead, and printing apparatus

Patent metadata

Field	Value
Publication number	US-10040284-B2
Application number	US-201615190557-A
Country	US
Kind code	B2
Filing date	Jun 23, 2016
Priority date	Jul 2, 2015
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A discharge element substrate comprises a plurality of discharge elements each including a first electrical contact and a second electrical contact, a plurality of driving circuits arranged in a first direction and each connected to the plurality of discharge elements, and a plurality of driving wiring lines extending in a second direction that intersects with the first direction and configured to connect the plurality of driving circuits and the first electrical contact of the plurality of discharge elements. A length, in the second direction, of a first driving wiring line connecting the first driving circuit and the first electrical contact of the first discharge element is shorter than a length, in the second direction, of a second driving wiring line connecting the second driving circuit and the first electrical contact of the second discharge element.

First claim

What is claimed is:

1. A discharge element substrate comprising:
groups arranged along a first direction, each of the groups comprising a first discharge element, a first driving circuit electrically connected to the first discharge element, a second discharge element, a second driving circuit electrically connected to the second discharge element, and a power supply wiring line including a common portion, a first portion and a second portion;
a power supply electrode extending in the first direction; and
first supply ports arranged along the first direction, each of the first supply ports corresponding to one of the groups,
wherein, in each of the groups, the first driving circuit and the second driving circuit are arranged along the first direction,
wherein, in each of the groups, the second discharge element and the power supply electrode are connected via the common portion and the first portion of the power supply wiring line, and the first discharge element and the power supply electrode are connected via the common portion and the second portion of the power supply wiring line,
wherein, in each of the groups, a length of the first portion is smaller than a length of the second portion,
wherein, in each of the groups, in a second direction which intersects the first direction, a first distance from the first driving circuit to the first discharge element is smaller than a second distance from the second driving circuit to the second discharge element,
wherein, in each of the groups, in the second direction, a length of a first driving wiring line connecting the first driving circuit and the first discharge element is smaller than a length of a second driving wiring line connecting the second driving circuit and the second discharge element, and
wherein the common portion and the second portion are arranged between two first supply ports which are adjacent to each other in the first direction.

2. The substrate according to claim 1 , wherein the first discharge element and the second discharge element are aligned along the second direction.

3. The substrate according to claim 1 , wherein the first discharge element is arranged between the first driving circuit and the second discharge element.

4. The substrate according to claim 1 , further comprising second supply ports arranged along the first direction,
wherein a column of the first supply ports and a column of the second supply ports are arranged in the second direction.

5. The substrate according to claim 4 , wherein the second discharge element is arranged between the second driving circuit and one of the second supply ports.

6. The substrate according to claim 1 , wherein the first discharge element is arranged between the first driving circuit and one of the first supply ports.

7. The substrate according to claim 1 , wherein a contact portion of the second discharge element with the second driving circuit is arranged between a contact portion of the second discharge element with the power supply wiring line and the second driving circuit, and
wherein the second portion of the power supply wiring line is branched from the first portion and is connected to the first discharge element.

8. A printhead comprising:
the discharge element substrate cited in claim 1 ;
an orifice configured to discharge a liquid under control of the discharge element substrate; and
a liquid container configured to contain ink.

9. A printing apparatus comprising:
the printhead cited in claim 8 ; and
a supply unit configured to supply a driving signal for causing the printhead to discharge a liquid.

10. The discharge element substrate according to claim 1 , wherein the first discharge element is arranged between the power supply electrode and the second discharge element in the second direction.

11. The discharge element substrate according to claim 1 , wherein the first discharge element includes:
a first electrical contact connected to the first driving circuit; and
a second electrical contact connected to the power supply electrode,
wherein the first electrical contact and the second electrical contact are arranged along in the second direction.

12. The discharge element substrate according to claim 1 , wherein the first discharge elements included in the groups are arranged along the first direction.

13. The substrate according to claim 1 , wherein each of the first supply ports is arranged between the first discharge element and the second discharge element of corresponding one of the groups.

14. A discharge element substrate comprising:
groups arranged along a first direction, each of the groups comprising a first discharge element, a first driving circuit electrically connected to the first discharge element, a second discharge element, and a second driving circuit electrically connected to the second discharge element;
a power supply electrode extending in the first direction; and
first supply ports arranged along in the first direction, each of the first supply ports corresponding to one of the groups,
wherein, in each of the groups, the first driving circuit and the second driving circuit are arranged along the first direction,
wherein, in each of the groups, in a second direction which intersects the first direction, a first distance from the first driving circuit to the first discharge element in the second direction is smaller than a second distance from the second driving circuit to the second discharge element in the second direction,
wherein, in each of the groups, in the second direction, a length of a first driving wiring line connecting the first driving circuit and the first discharge element is smaller than a length of a second driving wiring line connecting the second driving circuit and the second discharge element,
wherein, in each of the groups, a first end of a power supply wiring line is connected to the power supply electrode and a second end of the power supply wiring line is connected to the second discharge element,
wherein, in each of the groups, the power supply wiring line further includes a branch line that branches from a branch point which is provided on a path between the first end and the second end of the power supply wiring line,
wherein, in each of the groups, one end of the branch line is connected to the first discharge element, and the power supply electrode and the first discharge element are connected to each other via the branch point and the branch line,
wherein, in each of the groups, the branch point is closer to the second discharge element than to the first discharge element, and
wherein the power supply wiring line and the branch line are arranged between two first supply ports which are adjacent to each other in the first direction.

15. A printhead comprising:
the discharge element substrate cited in claim 14 ;
an orifice configured to discharge a liquid under control of the discharge element substrate; and
a liquid container configured to contain ink.

16. A printing apparatus comprising:
the printhead cited in claim 15 ; and
a supply unit configured to supply a driving signal for causing the printhead to discharge a liquid.

17. The discharge element substrate according to claim 14 , wherein the first discharge element is arranged between the power supply electrode and the second discharge element in the second direction.

18. The discharge element substrate according to claim 14 , further comprising second supply ports arranged along in the first direction,
wherein a column of the first supply ports and a column of the

Assignees

• Canon Kk

Inventors

• Fujii Yasuo

Classifications

• B41J2/0458

  controlling heads based on heating elements forming bubbles · CPC title

• B41J2202/13

  Heads having an integrated circuit · CPC title

• B41J2/0455

  Details of switching sections of circuit, e.g. transistors · CPC title

• B41J2/04548

  Details of power line section of control circuit · CPC title

• B41J2/14072 Primary

  Electrical connections, e.g. details on electrodes, connecting the chip to the outside... · CPC title