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US 11,951,737 B2Granted
Liquid discharge head unit and liquid discharge device
AssigneeSeiko Epson Corporation
InventorsShoichiro Yokoo, Noritaka Ide, Eiju Hirai, Masaki Mori, Yu Shiozawa
Life of this patent
Estimating the term…
Abstract
A distance between the first circuit and the second circuit is a first distance, a distance between the first circuit and the temperature detection circuit is a second distance longer than the first distance, and a distance between the second circuit and the temperature detection circuit is a third distance longer than the first distance.
Claims19
A liquid discharge head unit comprising:
- a liquid discharge head provided with a pressure chamber substrate having a plurality of pressure chambers, a piezoelectric element laminated on the pressure chamber substrate to apply pressure to each of the plurality of pressure chambers, and a drive wiring for applying a voltage for driving the piezoelectric element to the piezoelectric element;
- and
- a wiring substrate electrically coupled to the liquid discharge head, wherein
- the liquid discharge head is provided with a detection resistor formed of the same material as the piezoelectric element or the drive wiring and used to detect a temperature of the pressure chamber,
- the wiring substrate is provided with a first circuit, a second circuit different from the first circuit, and a temperature detection circuit electrically coupled to the detection resistor, and
- the first circuit, the second circuit, and the temperature detection circuit are provided at the wiring substrate so that
- a distance between the first circuit and the second circuit is a first distance,
- a distance between the first circuit and the temperature detection circuit is a second distance longer than the first distance, and
- a distance between the second circuit and the temperature detection circuit is a third distance longer than the first distance.
6 more elements
Dependencies are inferred from the claim text.