Substrate for liquid ejecting head, liquid ejecting head, and recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTatsuhito Goden, Yasuo Fujii
Life of this patent
Estimating the term…
Abstract
A substrate for a liquid ejecting head according to an exemplary embodiment of the present invention includes a first area having a plurality of ejection heaters and a driving circuit that is configured to supply electric energy to the plurality of ejection heaters disposed thereon, a second area having a signal supplying circuit that is configured to supply an electric signal to the driving circuit disposed thereon, and a heater that is configured to heat the substrate and that includes a first portion disposed in the first area and a second portion disposed in the second area. The magnitude of a current supplied to the first portion differs from the magnitude of a current supplied to the second portion.
Claims23
A substrate for a liquid ejecting head, the substrate comprising:
- a first area having a plurality of ejection heaters and a driving circuit disposed thereon, the driving circuit being configured to supply electric energy to the plurality of ejection heaters;
- a second area having a signal supplying circuit disposed thereon, the signal supplying circuit being configured to supply an electric signal to the driving circuit;
- and
- a substrate heater configured to heat the substrate, the substrate heater including a first portion disposed in the first area and a second portion disposed in the second area,
- wherein a magnitude of a current supplied to the first portion differs from a magnitude of a current supplied to the second portion.
A substrate for a liquid ejecting head, the substrate comprising:
- a first area having a plurality of ejection heaters and a driving circuit disposed thereon, the driving circuit being configured to supply electric energy to the plurality of ejection heaters;
- a second area having a signal supplying circuit disposed thereon, the signal supplying circuit being configured to supply an electric signal to the driving circuit;
- and
- a heater configured to heat the substrate, the heater including a first portion disposed in the first area and a second portion disposed in the second area,
- wherein a heat generation quantity of the first portion per unit area differs from a heat generation quantity of the second portion per unit area.
A recording apparatus, comprising:
- a substrate for a liquid ejecting head;
- and
- a controlling unit,
- wherein the substrate for the liquid ejecting head includes
- a first area having a plurality of ejection heaters and a driving circuit disposed thereon, the driving circuit being configured to supply electric energy to the plurality of ejection heaters,
- a second area having a signal supplying circuit disposed thereon, the signal supplying circuit being configured to supply an electric signal to the driving circuit, and
- a heater configured to heat the substrate, the heater including a first portion disposed in the first area and a second portion disposed in the second area, and
- wherein the controlling unit controls at least one of a current supplied to the first portion and a current supplied to the second portion independently from the other one of the current supplied to the first portion and the current supplied to the second portion.
Dependencies are inferred from the claim text.