Abstract: There is provided a liquid discharge apparatus including: a print head; a substrate unit; and a control circuit that controls operations of the print head and the substrate unit, in which the print head includes a first discharge section that has a first piezoelectric element that is displaced by receiving a first driving signal and discharges a liquid by displacement of the first piezoelectric element, and a first connector, the substrate unit includes a second connector that is electrically coupled to the print head by being fitted to the first connector, a first drive circuit that outputs the first driving signal, a temperature sensor that acquires environmental temperature, and a wiring substrate provided with the first drive circuit and the temperature sensor, and the control circuit controls the first drive circuit and the print head based on the environmental temperature acquired by the temperature sensor.

Abstract: There is provided a liquid discharge apparatus including a substrate unit, and includes a wiring substrate having a plurality of rigid members and flexible member, in which a first rigid member, and a second rigid member are positioned facing each other, a third rigid member laminated on a first surface of a third region of the flexible member is positioned such that a normal direction of a third front surface intersects a normal direction of a first front surface and a second front surface, the second connector is provided on a fourth rigid member laminated on a second surface of a third region of the flexible member, and a size of the third rigid member and a fourth rigid member is smaller than a size of the print head when a first discharge section is viewed from the first connector.

Abstract: There is provided a liquid discharge apparatus, in which a substrate unit having a first connector and a piezoelectric element, a reference voltage signal output circuit, an electrolytic capacitor, and a wiring substrate having a plurality of rigid members and a flexible member, the reference voltage signal output circuit has a first front surface and is provided on a first rigid member laminated on the first surface of the first region, the electrolytic capacitor has a second front surface and is provided on a second rigid member laminated on the first surface of the second region, the second connector is provided on a third rigid member laminated on the second surface of the second region, and the first rigid member and the second rigid member are positioned such that a normal direction of the first front surface and a normal direction of the second front surface intersect each other.

Abstract: There is provided a liquid discharge apparatus including: a first substrate and a second substrate are positioned such that the first substrate front surface and the second substrate front surface face each other along a fourth direction intersecting both a first direction and a second direction, the first drive circuit provided on the first substrate overlaps with at least a part of the second drive circuit provided on the first substrate, and a first integrated circuit included in the first drive circuit does not overlap with a second integrated circuit included in the second drive circuit, along the second direction, and the first drive circuit overlaps with at least a part of a third drive circuit provided on the second substrate, and the first integrated circuit included in the first drive circuit does not overlap with a third integrated circuit included in the third drive circuit, along the fourth direction.

Abstract: There is provided a liquid discharge apparatus including: a print head including a first connector; a substrate unit including a second connector fitted to the first connector and a third connector different from the second connector; and a relay substrate including a first cable through which a first voltage signal supplied to the substrate unit propagates, a second cable through which a second voltage signal supplied to the substrate unit propagates, a fourth connector fitted to the third connector, a relay substrate front surface, and a relay substrate back surface opposite to the relay substrate front surface, in which the first cable and the second cable are electrically coupled to the relay substrate front surface, the fourth connector is provided on the relay substrate back surface, and the first voltage signal and the second voltage signal propagate to the fourth connector.

Abstract: There is provided a liquid discharge apparatus including a substrate unit, in which the substrate unit includes a wiring substrate which is a rigid flexible substrate having a plurality of rigid members and flexible member, the flexible member includes a first surface, a second surface, a first region, a second region, and a third region, a first rigid member among the plurality of rigid members is laminated on the first surface of the first region such that a first front surface, the second rigid member among the plurality of rigid members is laminated on the first surface of the second region such that a second front surface, the flexible member includes a power supply voltage wiring, and the power supply voltage wiring is continuously provided over the first region, the second region, and the third region of the flexible member.

Abstract: There is provided a liquid discharge apparatus, in which a substrate unit includes a first drive circuit that has a first coil, a second drive circuit that has a second coil, a cooling fan that generates an air flow, a wiring substrate having a plurality of rigid members and a flexible member, and a plate-shaped opening member having a first opening and a second opening, the cooling fan generates an air flow in a space where a first front surface of a first rigid member on which the first coil is provided and a second front surface of a second rigid member on which the second coil is provided, and when viewed along a normal direction of the opening member, the first opening overlaps with at least a part of the first coil, and the second opening overlaps with at least a part of the second coil.

Abstract: There is provided a liquid discharge apparatus, in which a substrate unit includes a first abnormality notification section that notifies an abnormality of the substrate unit, a wiring substrate having a plurality of rigid members and a flexible member, a first heat sink, and a second heat sink, the first heat sink is laminated on the second surface of the first region and positioned close to the second rigid member, the second heat sink is laminated on the second surface of the second region and positioned close to the fourth rigid member, and the first abnormality notification section is provided on a fourth rigid member.

Abstract: There is provided a liquid discharge apparatus including: a substrate unit; a compressor that sends out compressed air; and a tube, in which the substrate unit includes a first drive circuit, a second drive circuit, and a wiring substrate having a plurality of rigid members and a flexible member, a first rigid member provided with a first drive circuit, having a first front surface, and laminated on the first surface of the first region, and a second rigid member provided with a second drive circuit, having a second front surface, and laminated on the first surface of the second region are positioned facing each other, and the compressor supplies the compressed air to a region where the first front surface and the second front surface face each other.

Abstract: There is provide a liquid discharge apparatus including: a first substrate including a first substrate front surface and a first substrate back surface opposite to the first substrate front surface; a second substrate including a second substrate front surface and a second substrate back surface opposite to the second substrate front surface; a first circuit having a first electronic component provided on the first substrate front surface; a second circuit having a second electronic component provided on the second substrate front surface; a cooling fan that generates an air flow in a gas flow path configured by the first substrate front surface and the second substrate front surface; a first heat sink attached to the first substrate; and a second heat sink attached to the second substrate.

Abstract: The present disclosure is directed to a method of manufacturing an oscillator. The oscillator includes a resonator element, an oscillation circuit which outputs an oscillation signal by oscillating the resonator element, and a temperature compensation circuit which compensates for temperature characteristics of a frequency of the oscillation signal in a desired temperature range. The method includes a first temperature compensation adjustment step in which the frequency is measured at multiple temperatures, and first temperature compensation data is calculated based on a relationship between temperature and the frequency.

Abstract: A method of manufacturing an oscillator including a resonator element, an oscillation circuit which outputs an oscillation signal by oscillating the resonator element, a temperature compensation circuit which compensates for temperature characteristics of a frequency of the oscillation signal in a desired temperature range, includes a first temperature compensation adjustment step in which the frequency is measured at multiple temperatures, and first temperature compensation data is calculated based on a relationship between temperature and the frequency; and performing a second temperature compensation adjustment step in which, after the first temperature compensation adjustment step, the frequency that is obtained by performing temperature compensation by the temperature compensation circuit based on the first temperature compensation data is measured at multiple temperatures, and second temperature compensation data is calculated based on a relationship between temperature and the frequency.

Abstract: A receiver circuit, which is connected with a partner transmitter circuit through a signal line and receives a signal based on current which flows through the signal line, includes a current/voltage conversion circuit which converts the current which flows through the signal line into voltage, a power supply circuit which adjusts the current which flows through the signal line based on a bias voltage Vb and voltage of a node NDX connected with the signal line, and a bias voltage generation circuit which outputs the bias voltage Vb which is adjusted in connection with characteristics of the power supply circuit.

Abstract: A receiver circuit, which is connected with a partner transmitter circuit through a signal line and receives a signal based on current which flows through the signal line, includes a current/voltage conversion circuit which converts the current which flows through the signal line into voltage, a power supply circuit which adjusts the current which flows through the signal line based on a bias voltage Vb and voltage of a node NDX connected with the signal line, and a bias voltage generation circuit which outputs the bias voltage Vb which is adjusted in connection with characteristics of the power supply circuit.