Liquid discharge apparatus, drive waveform generator, and head drive method

A drive waveform generator comprising:

• circuitry configured to:
• generate a drive waveform;
• and
• apply the drive waveform to a liquid discharge head to cause the liquid discharge head to discharge a liquid,
• the drive waveform including:
• a plurality of discharge pulses consisting of a first discharge pulse to cause the liquid discharge head to discharge the liquid and a second discharge pulse after the first discharge pulse to cause the liquid discharge head to discharge the liquid, the first discharge pulse and the second discharge pulse are in a nonresonant state;
• a pulse interval between the first discharge pulse and the second discharge pulse, the pulse interval is set to a time period in which the liquid is discharged by the second discharge pulse in the nonresonant state in which the second discharge pulse is nonresonant with a meniscus vibration generated by the first discharge pulse;
• and
• a non-discharge pulse between the first discharge pulse and the second discharge pulse, wherein the non-discharge pulse generates another meniscus vibration that does not cause the liquid discharge head to discharge the liquid.

A head drive method comprising:

• generating a drive waveform;
• and
• applying the drive waveform to a liquid discharge head to cause the liquid discharge head to discharge a liquid,
• the drive waveform including:
• a plurality of discharge pulses consisting of a first discharge pulse to cause the liquid discharge head to discharge the liquid and a second discharge pulse after the first discharge pulse to cause the liquid discharge head to discharge the liquid, the first discharge pulse and the second discharge pulse are in a nonresonant state;
• a pulse interval between the first discharge pulse and the second discharge pulse, the pulse interval is set to a time period in which the liquid is discharged by the second discharge pulse in the nonresonant state in which the second discharge pulse is nonresonant with a meniscus vibration generated by the first discharge pulse;
• and
• a non-discharge pulse between the first discharge pulse and the second discharge pulse, wherein the non-discharge pulse generates another meniscus vibration that does not cause the liquid discharge head to discharge the liquid.