A droplet ejection apparatus includes a main power supply, power cutoff detecting means, a standby power supply, residual vibration detecting means, storage means, and ejection failure detecting means. When cutoff of the main power supply is detected, an actuator is driven by a driving circuit, the residual...http://www.google.com/patents/US7311373?utm_source=gb-gplus-sharePatent US7311373 - Droplet ejection apparatus including recovery processing with a standby power supply
