Patent ID: 11904605
Assignee: SEIKO EPSON CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 2:
3. The head unit according to claim 1, further comprising:
a second driving element group that discharges a liquid by being driven by a second driving signal; and
a second driving circuit disposed on the substrate and outputting the second driving signal, wherein
the second driving circuit includes a second integrated circuit that outputs a third gate signal based on a second reference driving signal that is a reference of the second driving signal, a second amplifier circuit having a third transistor driven by the third gate signal, and a second smoothing circuit that smoothes output from the second amplifier circuit and outputs the second driving signal,
a third heat conductive elastic body among the plurality of heat conductive elastic bodies is positioned between the heat sink and the second integrated circuit, and is in contact with the heat sink and the second integrated circuit,
a fourth heat conductive elastic body among the plurality of heat conductive elastic bodies is positioned between the heat sink and the third transistor, and is in contact with the heat sink and the third transistor,
a length of the third transistor in the normal direction is different from a length of the second integrated circuit in the normal direction,
lengths of the third heat conductive elastic body and the fourth heat conductive elastic body in the normal direction before the heat sink is fixed to the substrate are longer than lengths of the third heat conductive elastic body and the fourth heat conductive elastic body in the normal direction after the heat sink is fixed to the substrate, and
the third heat conductive elastic body and the fourth heat conductive elastic body are in a form of a gel having flame retardancy and electric insulation property.