US 12,330,418 B2
Liquid discharge head and liquid discharge device
Masaki Mori, Shiojiri (JP); Yu Shiozawa, Shiojiri (JP); Motoki Takabe, Shiojiri (JP); Hitoshi Takaai, Azumino (JP); Eiju Hirai, Azumino (JP); and Michiya Kubokawa, Fujimi-machi (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jul. 13, 2022, as Appl. No. 17/812,302.
Claims priority of application No. 2021-116436 (JP), filed on Jul. 14, 2021.
Prior Publication US 2023/0020673 A1, Jan. 19, 2023
Int. Cl. B41J 2/14 (2006.01)
CPC B41J 2/14233 (2013.01) [B41J 2002/14491 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A liquid discharge head comprising:
a pressure chamber substrate that has a plurality of pressure chambers;
a piezoelectric element that is laminated at the pressure chamber substrate, and has an individual electrode individually provided for each of the plurality of pressure chambers, a common electrode commonly provided for the plurality of pressure chambers, and a piezoelectric body provided between the individual electrode and the common electrode in a lamination direction of the piezoelectric element and provided to apply pressure to a liquid in the pressure chamber;
a drive wiring that is electrically coupled to the individual electrode and the common electrode, and provided to apply a voltage for driving the piezoelectric body to the piezoelectric body;
a detection resistor that defects a temperature in the pressure chamber; and
a heating resistor that heats the liquid in the pressure chamber, wherein
the detection resistor is formed of the same material as any of the individual electrode, the common electrode, and the drive wiring,
the heating resistor is formed of the same material as any of the individual electrode, the common electrode, and the drive wiring, and
at least a part of the detection resistor and a part of the heating resistor are disposed at the same position as any of the individual electrode, the common electrode, and the drive wiring in the lamination direction.