Abstract: A liquid discharge apparatus includes a head unit, a carriage on which the head unit is mounted, a control unit including a drive circuit that generates a drive signal, and a drive signal supply line, in which the head unit includes a print head provided with a discharge section that discharges liquid, and a drive controller that controls the application of the drive signal to the discharge section, and a drive signal correction circuit electrically coupled to the drive signal supply line, and the drive signal correction circuit steps up the drive signal and supplies the drive signal to the drive controller when a voltage of the drive signal supplied from the control unit via the drive signal supply line is lower than a voltage of a reference waveform signal by a first voltage or more.

Abstract: A liquid ejection apparatus includes a drive signal output circuit that outputs a drive signal and a print head that ejects a liquid, in which the print head includes a temperature detection portion that detects temperature information, the drive signal output circuit includes an amplification circuit that outputs an amplification modulation signal, a smoothing circuit that outputs the drive signal, and a basic drive signal output circuit that outputs a basic drive signal that is corrected based on the temperature information, and a frequency of the amplification modulation signal when the temperature detection portion detects the temperature information used for the basic drive signal output circuit to correct the basic drive signal is higher than a frequency of the amplification modulation signal when the temperature detection portion detects the temperature information not used for the basic drive signal output circuit to correct the basic drive signal.

Abstract: In the liquid ejection apparatus, when first temperature information detected by a first ejection module includes information regarding a temperature in a first temperature range and first ejection data is a first value, a first switch circuit of the first ejection module outputs a first drive voltage signal including a second drive waveform, when second temperature information detected by a second ejection module includes the information regarding the temperature in the first temperature range and second ejection data is the first value, a second switch circuit of the second ejection module outputs a second drive voltage signal including a first drive waveform, and when the second temperature information includes information regarding a temperature in a second temperature range and the second ejection data is the first value, the second switch circuit outputs the second drive voltage signal including a second drive waveform.

Abstract: A liquid ejection apparatus includes a control circuit that outputs a control signal, a first drive signal output circuit that outputs a first drive signal, and a print head that ejects a liquid, in which the print head includes a piezoelectric element that is driven by receiving the first drive signal, a pressure chamber substrate that is provided with a plurality of pressure chambers of which volumes change due to deformation, a switch circuit that switches whether or not to supply the first drive signal to the piezoelectric element, a wiring substrate that is provided with the switch circuit, and a temperature detection portion that detects temperature information of the first pressure chamber, and the temperature information detected by the temperature detection portion is input to the control circuit in a period in which a voltage value of the first drive signal is constant.

Abstract: A liquid ejecting head control circuit controls a liquid ejecting head and a switching circuit. The liquid ejecting head control circuit includes a drive signal output circuit, and a switching control circuit. The switching control circuit outputs an ejection control signal defining an amount of a liquid to be ejected from a nozzle, a switching timing signal defining switching timing of the switching circuit, and a state selection signal defining a state of the switching circuit in a control period defined by the switching timing signal. The state selection signal for a first time period for which the liquid ejecting head is controlled so as to eject the liquid from the nozzle is different from the state selection signal for a second time period for which the liquid ejecting head is controlled so as not to eject the liquid from the nozzle.

Abstract: A liquid ejection apparatus includes a drive signal output circuit that outputs a drive signal and a print head that ejects a liquid, in which the print head includes a temperature detection portion that detects temperature information, the drive signal output circuit includes an amplification circuit that outputs an amplification modulation signal, a smoothing circuit that outputs the drive signal, and a basic drive signal output circuit that outputs a basic drive signal that is corrected based on the temperature information, and a frequency of the amplification modulation signal when the temperature detection portion detects the temperature information used for the basic drive signal output circuit to correct the basic drive signal is higher than a frequency of the amplification modulation signal when the temperature detection portion detects the temperature information not used for the basic drive signal output circuit to correct the basic drive signal.

Abstract: In the liquid ejection apparatus, when first temperature information detected by a first ejection module includes information regarding a temperature in a first temperature range and first ejection data is a first value, a first switch circuit of the first ejection module outputs a first drive voltage signal including a second drive waveform, when second temperature information detected by a second ejection module includes the information regarding the temperature in the first temperature range and second ejection data is the first value, a second switch circuit of the second ejection module outputs a second drive voltage signal including a first drive waveform, and when the second temperature information includes information regarding a temperature in a second temperature range and the second ejection data is the first value, the second switch circuit outputs the second drive voltage signal including a second drive waveform.

Abstract: A liquid ejection apparatus includes a control circuit that outputs a control signal, a first drive signal output circuit that outputs a first drive signal, and a print head that ejects a liquid, in which the print head includes a piezoelectric element that is driven by receiving the first drive signal, a pressure chamber substrate that is provided with a plurality of pressure chambers of which volumes change due to deformation, a switch circuit that switches whether or not to supply the first drive signal to the piezoelectric element, a wiring substrate that is provided with the switch circuit, and a temperature detection portion that detects temperature information of the first pressure chamber, and the temperature information detected by the temperature detection portion is input to the control circuit in a period in which a voltage value of the first drive signal is constant.

Abstract: A liquid ejection apparatus includes a control circuit, a drive signal output circuit that outputs a drive signal, and a print head that ejects a liquid, in which the print head includes a piezoelectric element that is driven by receiving the drive signal, a pressure chamber substrate that is provided with a plurality of pressure chambers of which volumes change due to deformation, a switch circuit that switches whether or not to supply the drive signal to the piezoelectric element, a wiring substrate that is provided with the switch circuit, and a temperature detection portion that detects temperature information of the pressure chamber, and the temperature information detected by the temperature detection portion in a period in which the switch circuit does not supply the drive signal to the piezoelectric element is input to the control circuit.

Abstract: A liquid ejecting head control circuit controls a liquid ejecting head and a switching circuit. The liquid ejecting head control circuit includes a drive signal output circuit, and a switching control circuit. The switching control circuit outputs an ejection control signal defining an amount of a liquid to be ejected from a nozzle, a switching timing signal defining switching timing of the switching circuit, and a state selection signal defining a state of the switching circuit in a control period defined by the switching timing signal. The state selection signal for a first time period for which the liquid ejecting head is controlled so as to eject the liquid from the nozzle is different from the state selection signal for a second time period for which the liquid ejecting head is controlled so as not to eject the liquid from the nozzle.

Abstract: A liquid discharge head control circuit that includes a conversion circuit that converts a base diagnosis signal being a base of a first diagnosis signal into a pair of first differential signals, a first wiring, a second wiring for propagating a second reference voltage signal to be supplied to a restoration circuit, a third wiring for propagating the second reference voltage signal to be supplied to the restoration circuit, a fourth wiring for propagating one signal of a pair of first differential signals, and a fifth wiring for propagating the other signal of a pair of first differential signals. The fourth wiring and the second wiring are located to be adjacent to each other, the fifth wiring and the third wiring are located to be adjacent to each other, and the fourth wiring and the fifth wiring are located between the second wiring and the third wiring.

Abstract: A liquid discharge head control circuit includes a first wiring for propagating a first reference voltage signal to be supplied to a driving signal selection circuit, a second wiring for propagating a second reference voltage signal to be supplied to a restoration circuit, a third wiring for propagating the second reference voltage signal to be supplied to the restoration circuit, a fourth wiring for propagating one signal of a pair of first differential signals, and a fifth wiring for propagating the other signal of a pair of first differential signals. The fourth wiring and the fifth wiring are arranged side by side. The fourth wiring and the second wiring are located to be adjacent to each other, the fifth wiring and the third wiring are located to be adjacent to each other, and the fourth wiring and the fifth wiring are located between the second wiring and the third wiring.

Abstract: A liquid ejecting apparatus includes a drive circuit that outputs a drive signal, in which the drive circuit includes an amplifier circuit that outputs an amplified modulation signal, and the amplifier circuit includes a first driver circuit electrically coupled to a first node to which a first voltage is supplied, a second driver circuit electrically coupled to a second node to which a second voltage is supplied, a first transistor electrically coupled to an output point from which the amplified modulation signal is output, a second transistor electrically coupled to the output point, a power supply node to which a third voltage is supplied, a capacitor electrically coupled to the output point and the first node, a first diode electrically coupled to the power supply node and the first node, and a step-down circuit electrically coupled to the power supply node and the second node.

Abstract: The first cable and the second cable are disposed to at least partially overlap with each other in a direction orthogonal to a direction in which the first terminal and the second terminal are lined up. The second terminal and the fourth terminal are disposed between the first terminal and the third terminal.

Abstract: The second terminal is disposed between the first terminal and the third terminal. The fifth terminal is disposed between the fourth terminal and the sixth terminal. The first cable and the second cable are disposed to at least partially overlap with each other in a direction orthogonal to a direction in which the first terminal and the second terminal are lined up.

Abstract: A first wiring supplies a first driving signal to one end of a first piezoelectric elements; a second wiring supplies a first voltage to the other end of the first piezoelectric element to allow the first voltage to maintain the other end of the first piezoelectric element to a common electric potential; a third wiring supplies a second driving signal to one end of a second piezoelectric elements; and a fourth wiring supplies a second signal to the other end of the second piezoelectric element to allow the second signal to maintain the other end of the second piezoelectric element to the common electric potential. The second wiring is arranged between the first wiring and the fourth wiring, the fourth wiring is arranged between the second wiring and the third wiring, and the second wiring and the fourth wiring are arranged between the first wiring and the third wiring.

Abstract: A liquid discharge head control circuit includes a first wiring for propagating a first reference voltage signal to be supplied to a driving signal selection circuit, a second wiring for propagating a second reference voltage signal to be supplied to a restoration circuit, a third wiring for propagating the second reference voltage signal to be supplied to the restoration circuit, a fourth wiring for propagating one signal of a pair of first differential signals, and a fifth wiring for propagating the other signal of a pair of first differential signals. The fourth wiring and the fifth wiring are arranged side by side. The fourth wiring and the second wiring are located to be adjacent to each other, the fifth wiring and the third wiring are located to be adjacent to each other, and the fourth wiring and the fifth wiring are located between the second wiring and the third wiring.

Abstract: A liquid discharge head control circuit that includes a conversion circuit that converts a base diagnosis signal being a base of a first diagnosis signal into a pair of first differential signals, a first wiring, a second wiring for propagating a second reference voltage signal to be supplied to a restoration circuit, a third wiring for propagating the second reference voltage signal to be supplied to the restoration circuit, a fourth wiring for propagating one signal of a pair of first differential signals, and a fifth wiring for propagating the other signal of a pair of first differential signals. The fourth wiring and the second wiring are located to be adjacent to each other, the fifth wiring and the third wiring are located to be adjacent to each other, and the fourth wiring and the fifth wiring are located between the second wiring and the third wiring.

Abstract: The first cable and the second cable are disposed to at least partially overlap with each other in a direction orthogonal to a direction in which the first terminal and the second terminal are lined up. The second terminal and the fourth terminal are disposed between the first terminal and the third terminal.

Abstract: The second terminal is disposed between the first terminal and the third terminal. The fifth terminal is disposed between the fourth terminal and the sixth terminal. The first cable and the second cable are disposed to at least partially overlap with each other in a direction orthogonal to a direction in which the first terminal and the second terminal are lined up.