Print head control circuit, print head, and liquid discharge apparatus

A print head comprising:

• a driving element that drives based on a driving signal, so as to discharge a liquid from a nozzle;
• a driving signal selection circuit that controls a supply of the driving signal to the driving element;
• a diagnosis circuit that diagnoses whether or not normal discharge of the liquid is possible, based on a first diagnosis signal, a second diagnosis signal, a third diagnosis signal, and a fourth diagnosis signal;
• a first terminal to which the first diagnosis signal is input;
• a second terminal to which the second diagnosis signal is input;
• a third terminal to which the third diagnosis signal is input;
• a fourth terminal to which the fourth diagnosis signal is input;
• a fifth terminal to which a fifth diagnosis signal indicating a diagnosis result of the diagnosis circuit is input;
• a sixth terminal to which a first voltage signal to be supplied to the driving signal selection circuit is input;
• and
• a seventh terminal to which a second voltage signal is input, wherein
• the fifth terminal and the seventh terminal are electrically coupled to each other,
• the first terminal and the second terminal are located to be aligned, and
• the first terminal and the seventh terminal are located to be adjacent to each other in a direction in which the first terminal and the second terminal are aligned.

A liquid discharge apparatus comprising:

• a print head;
• and
• a print head control circuit that controls an operation of the print head, wherein
• the print head includes
• a driving element that drives based on a driving signal, so as to discharge a liquid from a nozzle,
• a driving signal selection circuit that controls a supply of the driving signal to the driving element,
• a diagnosis circuit that diagnoses whether or not normal discharge of the liquid is possible, based on a first diagnosis signal, a second diagnosis signal, a third diagnosis signal, and a fourth diagnosis signal,
• a first terminal to which the first diagnosis signal is input,
• a second terminal to which the second diagnosis signal is input,
• a third terminal to which the third diagnosis signal is input,
• a fourth terminal to which the fourth diagnosis signal is input,
• a fifth terminal to which a fifth diagnosis signal indicating a diagnosis result of the diagnosis circuit is input,
• a sixth terminal to which a first voltage signal to be supplied to the driving signal selection circuit is input, and
• a seventh terminal to which a second voltage signal is input,
• the print head control circuit includes
• a first diagnosis signal propagation wiring for propagating the first diagnosis signal,
• a second diagnosis signal propagation wiring for propagating the second diagnosis signal,
• a third diagnosis signal propagation wiring for propagating the third diagnosis signal,
• a fourth diagnosis signal propagation wiring for propagating the fourth diagnosis signal,
• a fifth diagnosis signal propagation wiring for propagating the fifth diagnosis signal,
• a first voltage signal propagation wiring for propagating the first voltage signal,
• a second voltage signal propagation wiring for propagating the second voltage signal,
• a diagnosis signal output circuit that outputs the first diagnosis signal, the second diagnosis signal, the third diagnosis signal, and the fourth diagnosis signal, and
• a driving signal output circuit that outputs the driving signal,
• the first diagnosis signal propagation wiring is electrically in contact with the first terminal at a first contact section,
• the second diagnosis signal propagation wiring is electrically in contact with the second terminal at a second contact section,
• the third diagnosis signal propagation wiring is electrically in contact with the third terminal at a third contact section,
• the fourth diagnosis signal propagation wiring is electrically in contact with the fourth terminal at a fourth contact section,
• the fifth diagnosis signal propagation wiring is electrically in contact with the fifth terminal at a fifth contact section,
• the first voltage signal propagation wiring is electrically in contact with the sixth terminal at a sixth contact section,
• the second voltage signal propagation wiring is electrically in contact with the seventh terminal at a seventh contact section,
• the fifth diagnosis signal propagation wiring and the second voltage signal propagation wiring are electrically coupled to each other via the fifth terminal, the fifth contact section, the seventh contact section, and the seventh terminal,
• the first contact section and the second contact section are located to be aligned, and
• the first contact section and the seventh contact section are located to be adjacent to each other in a direction in which the first contact section and the second contact section are aligned.