US 12,280,595 B2
Liquid discharge head and liquid discharge device
Jingling Wang, Shiojiri (JP); Masaki Mori, Shiojiri (JP); and Yu Shiozawa, Shiojiri (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Nov. 29, 2022, as Appl. No. 18/059,609.
Claims priority of application No. 2021-193703 (JP), filed on Nov. 30, 2021.
Prior Publication US 2023/0166497 A1, Jun. 1, 2023
Int. Cl. B41J 2/045 (2006.01)
CPC B41J 2/04563 (2013.01) [B41J 2/04581 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A liquid discharge head comprising:
a pressure chamber substrate that is provided with a plurality of pressure chambers;
an individual electrode that is individually provided for the plurality of pressure chambers;
a common electrode that is commonly provided for the plurality of pressure chambers;
a piezoelectric body that is provided between the individual electrode and the common electrode for applying pressure to liquid in the pressure chambers;
a drive wiring that is electrically coupled to the individual electrode and the common electrode, and applies a voltage for driving the piezoelectric body;
a detection resistor that is formed of the same material as any of the individual electrode, the common electrode, and the drive wiring for detecting temperature of the liquid in the pressure chambers; and
a sealing substrate that has a wall portion and a ceiling portion, and protects the piezoelectric body by the wall portion and the ceiling portion, wherein
the detection resistor is provided so that a part overlapping the wall portion is shorter than a part not overlapping the wall portion when viewed along a lamination direction of the piezoelectric body, the individual electrode, and the common electrode.