Drive signal adjustment method of liquid ejecting head and liquid ejecting apparatus

A liquid ejecting apparatus comprising:

• a nozzle which ejects a liquid;
• a pressure generation chamber which communicates with the nozzle;
• a drive element which generates a pressure change in a liquid inside the pressure generation chamber due to a drive signal being applied;
• a drive signal generation unit which generates, as the drive signal, a drive signal which includes a drive pulse which includes an expansion element which expands a volume of the pressure generation chamber from a reference volume, an expansion maintenance element which maintains the volume of the pressure generation chamber which is expanded by the expansion element, a contraction element which contracts the volume of the pressure generation chamber, a contraction maintenance element which maintains the volume of the pressure generation chamber which is contracted by the contraction element, and an expansion restoration element which restores the volume of the pressure generation chamber to the reference volume;
• a control unit which controls the drive signal generation unit to generate a reference drive pulse which is the drive pulse which is generated using reference values in which a time of the contraction maintenance element and a period of the drive pulse are references, and a adjusting drive pulse which is the drive pulse which is generated using modification values in which the time and the period of the contraction maintenance element are different from the reference values, and drives the drive element using each of the reference drive pulse and the adjusting drive pulse which are generated to output a plurality of test patterns;
• and
• a presentation unit which presents a specific test pattern from the plurality of test patterns in a selectable manner,
• wherein the control unit sets the modification values which are used for the output of the specific test pattern based on the specific test pattern which is selected on the presentation unit.