Patent ID: 11884067
Assignee: SEIKO EPSON CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A liquid discharge apparatus comprising:
a discharge head that includes a piezoelectric element and discharges a liquid by driving the piezoelectric element; and
a driving signal output circuit that outputs a driving signal for driving the piezoelectric element, wherein
the driving signal output circuit includes
an integrated circuit that outputs a first control signal and a second control signal,
a first transistor to which the first control signal is input,
a second transistor to which the second control signal is input,
a coil that has one end electrically coupled to the first transistor and the second transistor, and the other end electrically coupled to the discharge head, and
a substrate,

the integrated circuit, the first transistor, the second transistor, and the coil are provided on the substrate,
the first transistor is a surface-mount type flat non-lead package, and in the first transistor, change in whether or not a second terminal and a third terminal are electrically coupled to each other is made according to the first control signal input to a first terminal,
the second transistor is a surface-mount type flat non-lead package, and in second transistor, change in whether or not a fifth terminal and a sixth terminal are electrically coupled to each other is made according to the second control signal input to a fourth terminal,
the coil is electrically coupled to the second terminal and the sixth terminal,
an area of a first contact portion where the first terminal is in contact with the substrate is smaller than that of a second contact portion where the second terminal is in contact with the substrate,
the area of the second contact portion where the second terminal is in contact with the substrate is smaller than that of a third contact portion where the third terminal is in contact with the substrate,
an area of a fourth contact portion where the fourth terminal is in contact with the substrate is smaller than that of a fifth contact portion where the fifth terminal is in contact with the substrate, and
the area of the fifth contact portion where the fifth terminal is in contact with the substrate is smaller than that of a sixth contact portion where the sixth terminal is in contact with the substrate.